[PATCH 1/4] counter: Internalize sysfs interface code

From: William Breathitt Gray
Date: Wed Apr 29 2020 - 14:12:22 EST

Next message: Andy Shevchenko: "Re: [PATCH v4 0/4] Add XHCI, EHCI and OHCI support for Broadcom STB SoS's"
Previous message: William Breathitt Gray: "[PATCH 3/4] counter: Add character device interface"
In reply to: kbuild test robot: "Re: [PATCH 3/4] counter: Add character device interface"
Next in thread: kbuild test robot: "Re: [PATCH 1/4] counter: Internalize sysfs interface code"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This is a reimplementation of the Generic Counter driver interface.
There are no modifications to the Counter subsystem userspace interface,
so existing userspace applications should continue to run seamlessly.

Overview
========

The purpose of this patch is to internalize the sysfs interface code
among the various counter drivers into a shared module. Counter drivers
pass and take data natively (i.e. unsigned long, bool, size_t, etc.) and
the shared counter module handles the translation between the sysfs
interface. This gurantees a standard userspace interface for all counter
drivers, and helps generalize the Generic Counter driver ABI in order to
support the Generic Counter chardev interface (introduced in a
subsequent patch) without changes to the existing counter drivers.

A high-level view of how a count value is passed down from a counter
driver can be exemplified by the following:

----------------------
/ Counter device \
+----------------------+
| Count register: 0x28 |
+----------------------+
|
-----------------
/ raw count data /
-----------------
|
V
+----------------------------+
| Counter device driver |----------+
+----------------------------+ |
| Processes data from device | -------------------
|----------------------------| / driver callbacks /
| Type: unsigned long | -------------------
| Value: 42 | |
+----------------------------+ |
| |
---------------- |
/ unsigned long / |
---------------- |
| |
| V
| +----------------------+
| | Counter core |
| +----------------------+
| | Routes device driver |
| | callbacks to the |
| | userspace interfaces |
| +----------------------+
| |
| -------------------
| / driver callbacks /
| -------------------
| |
+-------+ |
| |
| +---------------+
| |
V |
+--------------------+ |
| Counter sysfs |<-+
+--------------------+
| Translates to the |
| standard Counter |
| sysfs output |
|--------------------|
| Type: const char * |
| Value: "42" |
+--------------------+
|
---------------
/ const char * /
---------------
|
V
+--------------------------------------------------+
| `/sys/bus/counter/devices/counterX/countY/count` |
+--------------------------------------------------+
\ Count: "42" /
--------------------------------------------------

There are three primary components involved:

Counter device driver
---------------------
Communicates with the hardware device to read/write data; e.g.
counter drivers for 104-quad-8, stm32-timer, etc.

Counter core
------------
Registers the counter device driver to the system so that the
respective callbacks are called during userspace interaction

Counter sysfs
-------------
Translates counter data to the standard Counter sysfs interface
format and vice versa

Driver ABI
==========

This reimplementation entails several changes to the driver ABI. In
particular, the device driver callbacks are now expected to handle
standard C datatypes rather than translating the sysfs I/O directly.

To that end, the struct counter_data structure is introduced to
establish counter extensions for Signals, Synapses, and Counts:

struct counter_data {
enum counter_data_type type;
const char *name;
void *read;
void *write;
void *priv;
};

The "type" member specifies the type of data (e.g. unsigned long,
boolean, etc.) handled by this extension. The "read" and "write" members
can then be set by the counter device driver with callbacks to handle
that data.

Convenience macros such as COUNTER_DATA_UNSIGNED_LONG are provided for
use by driver authors. In particular, driver authors are expected to use
the provided macros for standard Counter subsystem attributes in order
to maintain a consistent interface for userspace. For example, a counter
device driver may define several standard attributes like so:

struct counter_data count_ext[] = {
COUNTER_DATA_DIRECTION(count_direction_read),
COUNTER_DATA_ENABLE(count_enable_read, count_enable_write),
COUNTER_DATA_CEILING(count_ceiling_read, count_ceiling_write),
};

This makes it intuitive to see, add, and modify the attributes that are
supported by this driver ("direction", "enable", and "ceiling") and to
maintain this code without getting lost in a web of struct braces.

Callbacks must match the function type expected for the respective
component or extension. These types are defined in the
drivers/counter/counter-function-types.h file.

The corresponding prototypes for the callbacks would be:

int count_direction_read(struct counter_device *counter,
struct counter_count *count,
enum counter_count_direction *direction);
int count_enable_read(struct counter_device *counter,
struct counter_count *count, bool *enable);
int count_enable_write(struct counter_device *counter,
struct counter_count *count, bool enable);
int count_ceiling_read(struct counter_device *counter,
struct counter_count *count,
unsigned long *ceiling);
int count_ceiling_write(struct counter_device *counter,
struct counter_count *count,
unsigned long ceiling);

In this way, driver authors no longer need to mess with sysfs strings
and are instead able to focus on what they actually care about doing --
getting data to/from the devices -- while the Generic Counter interface
handles the translation of that data for them between the various
userspace interfaces (e.g. sysfs and chardev).

Architecture
============

Counter device registration is the same as before: drivers populate a
struct counter_device with components and callbacks, then pass the
structure to the devm_counter_register function. However, what's
different now is how the Counter subsystem code handles this
registration internally.

Whereas before callbacks would interact directly with sysfs data, this
interaction is now abstracted and instead callbacks interact with native
C data types. The counter_data structure forms the basis for Counter
extentions.

The counter-sysfs.c file contains the code to parse through the
counter_device structure and register the requested components and
extensions. Attributes are created and populated based on type, with
respective translation functions to handle the mapping between sysfs and
the counter driver callbacks.

The counter-sysfs-callbacks.c file contains the code to map between the
abstract read and write callbacks of the counter driver and the more
specific show and store callbacks expected for sysfs. This mapping is
represented by the counter_data_sysfs_show and counter_data_sysfs_store
arrays, which point to the show and store translation functions for each
attribute.

The translation performed for each attribute is straightforward: the
attribute type and data is parsed from the counter_attribute structure,
the respective counter driver read/write callback is cast, and sysfs
I/O is handled before or after the driver read/write function is called.

The counter-function-types.h file contains the typedefs to simplify this
casting code. The counter-strings.h file contains the standard Counter
sysfs I/O string constants to maintain a consistent interface for
userspace.

Cc: Syed Nayyar Waris <syednwaris@xxxxxxxxx>
Cc: Patrick Havelange <patrick.havelange@xxxxxxxxxxxxx>
Cc: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: Alexandre Torgue <alexandre.torgue@xxxxxx>
Cc: David Lechner <david@xxxxxxxxxxxxxx>
Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
---
MAINTAINERS | 2 +-
drivers/counter/104-quad-8.c | 437 +++---
drivers/counter/Makefile | 1 +
drivers/counter/counter-core.c | 190 +++
drivers/counter/counter-function-types.h | 81 ++
drivers/counter/counter-strings.h | 46 +
drivers/counter/counter-sysfs-callbacks.c | 566 ++++++++
drivers/counter/counter-sysfs-callbacks.h | 28 +
drivers/counter/counter-sysfs.c | 524 ++++++++
drivers/counter/counter-sysfs.h | 14 +
drivers/counter/counter.c | 1496 ---------------------
drivers/counter/ftm-quaddec.c | 46 +-
drivers/counter/stm32-lptimer-cnt.c | 159 +--
drivers/counter/stm32-timer-cnt.c | 132 +-
drivers/counter/ti-eqep.c | 170 +--
include/linux/counter.h | 545 +++-----
include/linux/counter_enum.h | 45 -
include/uapi/linux/counter-types.h | 67 +
18 files changed, 2130 insertions(+), 2419 deletions(-)
create mode 100644 drivers/counter/counter-core.c
create mode 100644 drivers/counter/counter-function-types.h
create mode 100644 drivers/counter/counter-strings.h
create mode 100644 drivers/counter/counter-sysfs-callbacks.c
create mode 100644 drivers/counter/counter-sysfs-callbacks.h
create mode 100644 drivers/counter/counter-sysfs.c
create mode 100644 drivers/counter/counter-sysfs.h
delete mode 100644 drivers/counter/counter.c
delete mode 100644 include/linux/counter_enum.h
create mode 100644 include/uapi/linux/counter-types.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 10eb348c801c..89def3fe1c76 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4367,7 +4367,7 @@ F: Documentation/ABI/testing/sysfs-bus-counter*
F: Documentation/driver-api/generic-counter.rst
F: drivers/counter/
F: include/linux/counter.h
-F: include/linux/counter_enum.h
+F: include/uapi/linux/counter-types.h

CPMAC ETHERNET DRIVER
M: Florian Fainelli <f.fainelli@xxxxxxxxx>
diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
index 9dab190c49b0..bc1801e1bce9 100644
--- a/drivers/counter/104-quad-8.c
+++ b/drivers/counter/104-quad-8.c
@@ -651,21 +651,22 @@ static int quad8_count_write(struct counter_device *counter,
}

enum quad8_count_function {
- QUAD8_COUNT_FUNCTION_PULSE_DIRECTION = 0,
- QUAD8_COUNT_FUNCTION_QUADRATURE_X1,
- QUAD8_COUNT_FUNCTION_QUADRATURE_X2,
- QUAD8_COUNT_FUNCTION_QUADRATURE_X4
+ QUAD8_COUNT_FUNCTION_PULSE_DIRECTION = COUNTER_COUNT_FUNCTION_PULSE_DIRECTION,
+ QUAD8_COUNT_FUNCTION_QUADRATURE_X1 = COUNTER_COUNT_FUNCTION_QUADRATURE_X1_A,
+ QUAD8_COUNT_FUNCTION_QUADRATURE_X2 = COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A,
+ QUAD8_COUNT_FUNCTION_QUADRATURE_X4 = COUNTER_COUNT_FUNCTION_QUADRATURE_X4,
};

-static enum counter_count_function quad8_count_functions_list[] = {
- [QUAD8_COUNT_FUNCTION_PULSE_DIRECTION] = COUNTER_COUNT_FUNCTION_PULSE_DIRECTION,
- [QUAD8_COUNT_FUNCTION_QUADRATURE_X1] = COUNTER_COUNT_FUNCTION_QUADRATURE_X1_A,
- [QUAD8_COUNT_FUNCTION_QUADRATURE_X2] = COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A,
- [QUAD8_COUNT_FUNCTION_QUADRATURE_X4] = COUNTER_COUNT_FUNCTION_QUADRATURE_X4
+static const enum counter_count_function quad8_count_functions_list[] = {
+ QUAD8_COUNT_FUNCTION_PULSE_DIRECTION,
+ QUAD8_COUNT_FUNCTION_QUADRATURE_X1,
+ QUAD8_COUNT_FUNCTION_QUADRATURE_X2,
+ QUAD8_COUNT_FUNCTION_QUADRATURE_X4,
};

-static int quad8_function_get(struct counter_device *counter,
- struct counter_count *count, size_t *function)
+static int quad8_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_function *function)
{
const struct quad8_iio *const priv = counter->priv;
const int id = count->id;
@@ -690,11 +691,13 @@ static int quad8_function_get(struct counter_device *counter,
return 0;
}

-static int quad8_function_set(struct counter_device *counter,
- struct counter_count *count, size_t function)
+static int quad8_function_write(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_function function)
{
struct quad8_iio *const priv = counter->priv;
const int id = count->id;
+ const enum quad8_count_function cnt_function = function;
unsigned int *const quadrature_mode = priv->quadrature_mode + id;
unsigned int *const scale = priv->quadrature_scale + id;
unsigned int mode_cfg = priv->count_mode[id] << 1;
@@ -702,7 +705,7 @@ static int quad8_function_set(struct counter_device *counter,
const unsigned int idr_cfg = priv->index_polarity[id] << 1;
const int base_offset = priv->base + 2 * id + 1;

- if (function == QUAD8_COUNT_FUNCTION_PULSE_DIRECTION) {
+ if (cnt_function == QUAD8_COUNT_FUNCTION_PULSE_DIRECTION) {
*quadrature_mode = 0;

/* Quadrature scaling only available in quadrature mode */
@@ -717,7 +720,7 @@ static int quad8_function_set(struct counter_device *counter,
} else {
*quadrature_mode = 1;

- switch (function) {
+ switch (cnt_function) {
case QUAD8_COUNT_FUNCTION_QUADRATURE_X1:
*scale = 0;
mode_cfg |= QUAD8_CMR_QUADRATURE_X1;
@@ -730,6 +733,7 @@ static int quad8_function_set(struct counter_device *counter,
*scale = 2;
mode_cfg |= QUAD8_CMR_QUADRATURE_X4;
break;
+ default: return -EINVAL;
}
}

@@ -739,8 +743,9 @@ static int quad8_function_set(struct counter_device *counter,
return 0;
}

-static void quad8_direction_get(struct counter_device *counter,
- struct counter_count *count, enum counter_count_direction *direction)
+static int quad8_direction_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_direction *direction)
{
const struct quad8_iio *const priv = counter->priv;
unsigned int ud_flag;
@@ -751,91 +756,81 @@ static void quad8_direction_get(struct counter_device *counter,

*direction = (ud_flag) ? COUNTER_COUNT_DIRECTION_FORWARD :
COUNTER_COUNT_DIRECTION_BACKWARD;
-}

-enum quad8_synapse_action {
- QUAD8_SYNAPSE_ACTION_NONE = 0,
- QUAD8_SYNAPSE_ACTION_RISING_EDGE,
- QUAD8_SYNAPSE_ACTION_FALLING_EDGE,
- QUAD8_SYNAPSE_ACTION_BOTH_EDGES
-};
+ return 0;
+}

-static enum counter_synapse_action quad8_index_actions_list[] = {
- [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
- [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE
+static const enum counter_synapse_action quad8_index_actions_list[] = {
+ COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
};

-static enum counter_synapse_action quad8_synapse_actions_list[] = {
- [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
- [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE,
- [QUAD8_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
- [QUAD8_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES
+static const enum counter_synapse_action quad8_synapse_actions_list[] = {
+ COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+ COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
};

-static int quad8_action_get(struct counter_device *counter,
- struct counter_count *count, struct counter_synapse *synapse,
- size_t *action)
+static int quad8_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
struct quad8_iio *const priv = counter->priv;
int err;
- size_t function = 0;
+ enum counter_count_function function = 0;
const size_t signal_a_id = count->synapses[0].signal->id;
enum counter_count_direction direction;

/* Handle Index signals */
if (synapse->signal->id >= 16) {
if (priv->preset_enable[count->id])
- *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
else
- *action = QUAD8_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;

return 0;
}

- err = quad8_function_get(counter, count, &function);
+ err = quad8_function_read(counter, count, &function);
if (err)
return err;

/* Default action mode */
- *action = QUAD8_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;

/* Determine action mode based on current count function mode */
switch (function) {
case QUAD8_COUNT_FUNCTION_PULSE_DIRECTION:
if (synapse->signal->id == signal_a_id)
- *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
break;
case QUAD8_COUNT_FUNCTION_QUADRATURE_X1:
if (synapse->signal->id == signal_a_id) {
- quad8_direction_get(counter, count, &direction);
+ err = quad8_direction_read(counter, count, &direction);
+ if (err)
+ return err;

if (direction == COUNTER_COUNT_DIRECTION_FORWARD)
- *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
else
- *action = QUAD8_SYNAPSE_ACTION_FALLING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_FALLING_EDGE;
}
break;
case QUAD8_COUNT_FUNCTION_QUADRATURE_X2:
if (synapse->signal->id == signal_a_id)
- *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
break;
case QUAD8_COUNT_FUNCTION_QUADRATURE_X4:
- *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
break;
+ default: return -EINVAL;
}

return 0;
}

-static const struct counter_ops quad8_ops = {
- .signal_read = quad8_signal_read,
- .count_read = quad8_count_read,
- .count_write = quad8_count_write,
- .function_get = quad8_function_get,
- .function_set = quad8_function_set,
- .action_get = quad8_action_get
-};
-
static int quad8_index_polarity_get(struct counter_device *counter,
struct counter_signal *signal, size_t *index_polarity)
{
@@ -864,12 +859,7 @@ static int quad8_index_polarity_set(struct counter_device *counter,
return 0;
}

-static struct counter_signal_enum_ext quad8_index_pol_enum = {
- .items = quad8_index_polarity_modes,
- .num_items = ARRAY_SIZE(quad8_index_polarity_modes),
- .get = quad8_index_polarity_get,
- .set = quad8_index_polarity_set
-};
+static DEFINE_COUNTER_ENUM(quad8_index_pol_enum, quad8_index_polarity_modes);

static int quad8_synchronous_mode_get(struct counter_device *counter,
struct counter_signal *signal, size_t *synchronous_mode)
@@ -903,22 +893,21 @@ static int quad8_synchronous_mode_set(struct counter_device *counter,
return 0;
}

-static struct counter_signal_enum_ext quad8_syn_mode_enum = {
- .items = quad8_synchronous_modes,
- .num_items = ARRAY_SIZE(quad8_synchronous_modes),
- .get = quad8_synchronous_mode_get,
- .set = quad8_synchronous_mode_set
-};
+static DEFINE_COUNTER_ENUM(quad8_syn_mode_enum, quad8_synchronous_modes);

-static ssize_t quad8_count_floor_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_floor_read(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long *floor)
{
/* Only a floor of 0 is supported */
- return sprintf(buf, "0\n");
+ *floor = 0;
+
+ return 0;
}

-static int quad8_count_mode_get(struct counter_device *counter,
- struct counter_count *count, size_t *cnt_mode)
+static int quad8_count_mode_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_mode *cnt_mode)
{
const struct quad8_iio *const priv = counter->priv;

@@ -941,33 +930,35 @@ static int quad8_count_mode_get(struct counter_device *counter,
return 0;
}

-static int quad8_count_mode_set(struct counter_device *counter,
- struct counter_count *count, size_t cnt_mode)
+static int quad8_count_mode_write(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_mode cnt_mode)
{
struct quad8_iio *const priv = counter->priv;
+ unsigned int count_mode = 0;
unsigned int mode_cfg;
const int base_offset = priv->base + 2 * count->id + 1;

/* Map Generic Counter count mode to 104-QUAD-8 count mode */
switch (cnt_mode) {
case COUNTER_COUNT_MODE_NORMAL:
- cnt_mode = 0;
+ count_mode = 0;
break;
case COUNTER_COUNT_MODE_RANGE_LIMIT:
- cnt_mode = 1;
+ count_mode = 1;
break;
case COUNTER_COUNT_MODE_NON_RECYCLE:
- cnt_mode = 2;
+ count_mode = 2;
break;
case COUNTER_COUNT_MODE_MODULO_N:
- cnt_mode = 3;
+ count_mode = 3;
break;
}

- priv->count_mode[count->id] = cnt_mode;
+ priv->count_mode[count->id] = count_mode;

/* Set count mode configuration value */
- mode_cfg = cnt_mode << 1;
+ mode_cfg = count_mode << 1;

/* Add quadrature mode configuration */
if (priv->quadrature_mode[count->id])
@@ -979,92 +970,89 @@ static int quad8_count_mode_set(struct counter_device *counter,
return 0;
}

-static struct counter_count_enum_ext quad8_cnt_mode_enum = {
- .items = counter_count_mode_str,
- .num_items = ARRAY_SIZE(counter_count_mode_str),
- .get = quad8_count_mode_get,
- .set = quad8_count_mode_set
+static enum counter_count_mode quad8_cnt_modes[] = {
+ COUNTER_COUNT_MODE_NORMAL,
+ COUNTER_COUNT_MODE_RANGE_LIMIT,
+ COUNTER_COUNT_MODE_NON_RECYCLE,
+ COUNTER_COUNT_MODE_MODULO_N,
};

-static ssize_t quad8_count_direction_read(struct counter_device *counter,
- struct counter_count *count, void *priv, char *buf)
-{
- enum counter_count_direction dir;
-
- quad8_direction_get(counter, count, &dir);
-
- return sprintf(buf, "%s\n", counter_count_direction_str[dir]);
-}
+static DEFINE_COUNTER_AVAILABLE(quad8_count_mode_available, quad8_cnt_modes);

-static ssize_t quad8_count_enable_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_enable_read(struct counter_device *counter,
+ struct counter_count *count, bool *enable)
{
const struct quad8_iio *const priv = counter->priv;

- return sprintf(buf, "%u\n", priv->ab_enable[count->id]);
+ *enable = priv->ab_enable[count->id];
+
+ return 0;
}

-static ssize_t quad8_count_enable_write(struct counter_device *counter,
- struct counter_count *count, void *private, const char *buf, size_t len)
+static int quad8_count_enable_write(struct counter_device *counter,
+ struct counter_count *count, bool enable)
{
struct quad8_iio *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
- int err;
- bool ab_enable;
unsigned int ior_cfg;

- err = kstrtobool(buf, &ab_enable);
- if (err)
- return err;
+ priv->ab_enable[count->id] = enable;

- priv->ab_enable[count->id] = ab_enable;
-
- ior_cfg = ab_enable | priv->preset_enable[count->id] << 1;
+ ior_cfg = enable | priv->preset_enable[count->id] << 1;

/* Load I/O control configuration */
outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1);

- return len;
+ return 0;
}

-static int quad8_error_noise_get(struct counter_device *counter,
- struct counter_count *count, size_t *noise_error)
+static ssize_t quad8_error_noise_read(struct counter_device *counter,
+ struct counter_count *count, char *buf,
+ size_t size)
{
const struct quad8_iio *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id + 1;
+ size_t noise_error;

- *noise_error = !!(inb(base_offset) & QUAD8_FLAG_E);
+ noise_error = !!(inb(base_offset) & QUAD8_FLAG_E);

- return 0;
+ return snprintf(buf, size, "%s\n",
+ quad8_noise_error_states[noise_error]);
}

-static struct counter_count_enum_ext quad8_error_noise_enum = {
- .items = quad8_noise_error_states,
- .num_items = ARRAY_SIZE(quad8_noise_error_states),
- .get = quad8_error_noise_get
-};
+static ssize_t quad8_error_noise_available_read(struct counter_device *counter,
+ struct counter_count *count,
+ char *buf, size_t size)
+{
+ size_t i;
+ size_t len = 0;

-static ssize_t quad8_count_preset_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+ for (i = 0; i < ARRAY_SIZE(quad8_noise_error_states) && size > 1; i++)
+ len += scnprintf(buf + len, size - len, "%s\n",
+ quad8_noise_error_states[i]);
+
+ return len;
+}
+
+static int quad8_count_preset_read(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long *preset)
{
const struct quad8_iio *const priv = counter->priv;

- return sprintf(buf, "%u\n", priv->preset[count->id]);
+ *preset = priv->preset[count->id];
+
+ return 0;
}

-static ssize_t quad8_count_preset_write(struct counter_device *counter,
- struct counter_count *count, void *private, const char *buf, size_t len)
+static int quad8_count_preset_write(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long preset)
{
struct quad8_iio *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
- unsigned int preset;
- int ret;
int i;

- ret = kstrtouint(buf, 0, &preset);
- if (ret)
- return ret;
-
/* Only 24-bit values are supported */
if (preset > 0xFFFFFF)
return -EINVAL;
@@ -1078,11 +1066,12 @@ static ssize_t quad8_count_preset_write(struct counter_device *counter,
for (i = 0; i < 3; i++)
outb(preset >> (8 * i), base_offset);

- return len;
+ return 0;
}

-static ssize_t quad8_count_ceiling_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_ceiling_read(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long *ceiling)
{
const struct quad8_iio *const priv = counter->priv;

@@ -1090,15 +1079,18 @@ static ssize_t quad8_count_ceiling_read(struct counter_device *counter,
switch (priv->count_mode[count->id]) {
case 1:
case 3:
- return quad8_count_preset_read(counter, count, private, buf);
+ return quad8_count_preset_read(counter, count, ceiling);
}

/* By default 0x1FFFFFF (25 bits unsigned) is maximum count */
- return sprintf(buf, "33554431\n");
+ *ceiling = 0x1FFFFFF;
+
+ return 0;
}

-static ssize_t quad8_count_ceiling_write(struct counter_device *counter,
- struct counter_count *count, void *private, const char *buf, size_t len)
+static int quad8_count_ceiling_write(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long ceiling)
{
struct quad8_iio *const priv = counter->priv;

@@ -1106,34 +1098,31 @@ static ssize_t quad8_count_ceiling_write(struct counter_device *counter,
switch (priv->count_mode[count->id]) {
case 1:
case 3:
- return quad8_count_preset_write(counter, count, private, buf,
- len);
+ return quad8_count_preset_write(counter, count, ceiling);
}

- return len;
+ return -EINVAL;
}

-static ssize_t quad8_count_preset_enable_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_preset_enable_read(struct counter_device *counter,
+ struct counter_count *count,
+ bool *preset_enable)
{
const struct quad8_iio *const priv = counter->priv;

- return sprintf(buf, "%u\n", !priv->preset_enable[count->id]);
+ *preset_enable = !priv->preset_enable[count->id];
+
+ return 0;
}

-static ssize_t quad8_count_preset_enable_write(struct counter_device *counter,
- struct counter_count *count, void *private, const char *buf, size_t len)
+static int quad8_count_preset_enable_write(struct counter_device *counter,
+ struct counter_count *count,
+ bool preset_enable)
{
struct quad8_iio *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id + 1;
- bool preset_enable;
- int ret;
unsigned int ior_cfg;

- ret = kstrtobool(buf, &preset_enable);
- if (ret)
- return ret;
-
/* Preset enable is active low in Input/Output Control register */
preset_enable = !preset_enable;

@@ -1144,18 +1133,16 @@ static ssize_t quad8_count_preset_enable_write(struct counter_device *counter,
/* Load I/O control configuration to Input / Output Control Register */
outb(QUAD8_CTR_IOR | ior_cfg, base_offset);

- return len;
+ return 0;
}

-static ssize_t quad8_signal_cable_fault_read(struct counter_device *counter,
- struct counter_signal *signal,
- void *private, char *buf)
+static int quad8_signal_cable_fault_read(struct counter_device *counter,
+ struct counter_signal *signal, bool *cable_fault)
{
const struct quad8_iio *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
const bool disabled = !(priv->cable_fault_enable & BIT(channel_id));
unsigned int status;
- unsigned int fault;

if (disabled)
return -EINVAL;
@@ -1164,36 +1151,29 @@ static ssize_t quad8_signal_cable_fault_read(struct counter_device *counter,
status = inb(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS);

/* Mask respective channel and invert logic */
- fault = !(status & BIT(channel_id));
+ *cable_fault = !(status & BIT(channel_id));

- return sprintf(buf, "%u\n", fault);
+ return 0;
}

-static ssize_t quad8_signal_cable_fault_enable_read(
- struct counter_device *counter, struct counter_signal *signal,
- void *private, char *buf)
+static int quad8_signal_cable_fault_enable_read(struct counter_device *counter,
+ struct counter_signal *signal, bool *enable)
{
const struct quad8_iio *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
- const unsigned int enb = !!(priv->cable_fault_enable & BIT(channel_id));

- return sprintf(buf, "%u\n", enb);
+ *enable = !!(priv->cable_fault_enable & BIT(channel_id));
+
+ return 0;
}

-static ssize_t quad8_signal_cable_fault_enable_write(
- struct counter_device *counter, struct counter_signal *signal,
- void *private, const char *buf, size_t len)
+static int quad8_signal_cable_fault_enable_write(struct counter_device *counter,
+ struct counter_signal *signal, bool enable)
{
struct quad8_iio *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
- bool enable;
- int ret;
unsigned int cable_fault_enable;

- ret = kstrtobool(buf, &enable);
- if (ret)
- return ret;
-
if (enable)
priv->cable_fault_enable |= BIT(channel_id);
else
@@ -1204,31 +1184,29 @@ static ssize_t quad8_signal_cable_fault_enable_write(

outb(cable_fault_enable, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS);

- return len;
+ return 0;
}

-static ssize_t quad8_signal_fck_prescaler_read(struct counter_device *counter,
- struct counter_signal *signal, void *private, char *buf)
+static int quad8_signal_fck_prescaler_read(struct counter_device *counter,
+ struct counter_signal *signal, unsigned long *prescaler)
{
const struct quad8_iio *const priv = counter->priv;
- const size_t channel_id = signal->id / 2;

- return sprintf(buf, "%u\n", priv->fck_prescaler[channel_id]);
+ *prescaler = priv->fck_prescaler[signal->id / 2];
+
+ return 0;
}

-static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter,
- struct counter_signal *signal, void *private, const char *buf,
- size_t len)
+static int quad8_signal_fck_prescaler_write(struct counter_device *counter,
+ struct counter_signal *signal, unsigned long prescaler)
{
struct quad8_iio *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
const int base_offset = priv->base + 2 * channel_id;
- u8 prescaler;
- int ret;

- ret = kstrtou8(buf, 0, &prescaler);
- if (ret)
- return ret;
+ /* prescaler is an 8-bit value */
+ if (prescaler > 255)
+ return -ERANGE;

priv->fck_prescaler[channel_id] = prescaler;

@@ -1240,31 +1218,28 @@ static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter,
outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC,
base_offset + 1);

- return len;
+ return 0;
}

-static const struct counter_signal_ext quad8_signal_ext[] = {
- {
- .name = "cable_fault",
- .read = quad8_signal_cable_fault_read
- },
- {
- .name = "cable_fault_enable",
- .read = quad8_signal_cable_fault_enable_read,
- .write = quad8_signal_cable_fault_enable_write
- },
- {
- .name = "filter_clock_prescaler",
- .read = quad8_signal_fck_prescaler_read,
- .write = quad8_signal_fck_prescaler_write
- }
+static struct counter_data quad8_signal_ext[] = {
+ COUNTER_DATA_BOOL("cable_fault", quad8_signal_cable_fault_read, NULL),
+ COUNTER_DATA_BOOL("cable_fault_enable",
+ quad8_signal_cable_fault_enable_read,
+ quad8_signal_cable_fault_enable_write),
+ COUNTER_DATA_UNSIGNED_LONG("filter_clock_prescaler",
+ quad8_signal_fck_prescaler_read,
+ quad8_signal_fck_prescaler_write)
};

-static const struct counter_signal_ext quad8_index_ext[] = {
- COUNTER_SIGNAL_ENUM("index_polarity", &quad8_index_pol_enum),
- COUNTER_SIGNAL_ENUM_AVAILABLE("index_polarity", &quad8_index_pol_enum),
- COUNTER_SIGNAL_ENUM("synchronous_mode", &quad8_syn_mode_enum),
- COUNTER_SIGNAL_ENUM_AVAILABLE("synchronous_mode", &quad8_syn_mode_enum)
+static struct counter_data quad8_index_ext[] = {
+ COUNTER_DATA_ENUM_AND_AVAILABLE("index_polarity",
+ quad8_index_polarity_get,
+ quad8_index_polarity_set,
+ quad8_index_pol_enum),
+ COUNTER_DATA_ENUM_AND_AVAILABLE("synchronous_mode",
+ quad8_synchronous_mode_get,
+ quad8_synchronous_mode_set,
+ quad8_syn_mode_enum),
};

#define QUAD8_QUAD_SIGNAL(_id, _name) { \
@@ -1333,39 +1308,20 @@ static struct counter_synapse quad8_count_synapses[][3] = {
QUAD8_COUNT_SYNAPSES(6), QUAD8_COUNT_SYNAPSES(7)
};

-static const struct counter_count_ext quad8_count_ext[] = {
- {
- .name = "ceiling",
- .read = quad8_count_ceiling_read,
- .write = quad8_count_ceiling_write
- },
- {
- .name = "floor",
- .read = quad8_count_floor_read
- },
- COUNTER_COUNT_ENUM("count_mode", &quad8_cnt_mode_enum),
- COUNTER_COUNT_ENUM_AVAILABLE("count_mode", &quad8_cnt_mode_enum),
- {
- .name = "direction",
- .read = quad8_count_direction_read
- },
- {
- .name = "enable",
- .read = quad8_count_enable_read,
- .write = quad8_count_enable_write
- },
- COUNTER_COUNT_ENUM("error_noise", &quad8_error_noise_enum),
- COUNTER_COUNT_ENUM_AVAILABLE("error_noise", &quad8_error_noise_enum),
- {
- .name = "preset",
- .read = quad8_count_preset_read,
- .write = quad8_count_preset_write
- },
- {
- .name = "preset_enable",
- .read = quad8_count_preset_enable_read,
- .write = quad8_count_preset_enable_write
- }
+static struct counter_data quad8_count_ext[] = {
+ COUNTER_DATA_CEILING(quad8_count_ceiling_read,
+ quad8_count_ceiling_write),
+ COUNTER_DATA_FLOOR(quad8_count_floor_read, NULL),
+ COUNTER_DATA_COUNT_MODE_AND_AVAILABLE(quad8_count_mode_read,
+ quad8_count_mode_write,
+ quad8_count_mode_available),
+ COUNTER_DATA_DIRECTION(quad8_direction_read),
+ COUNTER_DATA_ENABLE(quad8_count_enable_read, quad8_count_enable_write),
+ COUNTER_DATA_ERROR_NOISE_AND_AVAILABLE(quad8_error_noise_read,
+ quad8_error_noise_available_read),
+ COUNTER_DATA_PRESET(quad8_count_preset_read, quad8_count_preset_write),
+ COUNTER_DATA_PRESET_ENABLE(quad8_count_preset_enable_read,
+ quad8_count_preset_enable_write),
};

#define QUAD8_COUNT(_id, _cntname) { \
@@ -1421,7 +1377,12 @@ static int quad8_probe(struct device *dev, unsigned int id)
quad8iio = iio_priv(indio_dev);
quad8iio->counter.name = dev_name(dev);
quad8iio->counter.parent = dev;
- quad8iio->counter.ops = &quad8_ops;
+ quad8iio->counter.signal_read = quad8_signal_read;
+ quad8iio->counter.count_read = quad8_count_read;
+ quad8iio->counter.count_write = quad8_count_write;
+ quad8iio->counter.function_read = quad8_function_read;
+ quad8iio->counter.function_write = quad8_function_write;
+ quad8iio->counter.action_read = quad8_action_read;
quad8iio->counter.counts = quad8_counts;
quad8iio->counter.num_counts = ARRAY_SIZE(quad8_counts);
quad8iio->counter.signals = quad8_signals;
diff --git a/drivers/counter/Makefile b/drivers/counter/Makefile
index 55142d1f4c43..2d2644bd7777 100644
--- a/drivers/counter/Makefile
+++ b/drivers/counter/Makefile
@@ -4,6 +4,7 @@
#

obj-$(CONFIG_COUNTER) += counter.o
+counter-y := counter-core.o counter-sysfs.o counter-sysfs-callbacks.o

obj-$(CONFIG_104_QUAD_8) += 104-quad-8.o
obj-$(CONFIG_STM32_TIMER_CNT) += stm32-timer-cnt.o
diff --git a/drivers/counter/counter-core.c b/drivers/counter/counter-core.c
new file mode 100644
index 000000000000..008d51284a2c
--- /dev/null
+++ b/drivers/counter/counter-core.c
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic Counter interface
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#include <linux/counter.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/gfp.h>
+#include <linux/idr.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "counter-sysfs.h"
+
+/* Provides a unique ID for each counter device */
+static DEFINE_IDA(counter_ida);
+
+static void counter_device_release(struct device *dev)
+{
+ struct counter_device *const counter = dev_get_drvdata(dev);
+
+ counter_sysfs_free(counter);
+ kfree(&counter->dev);
+ ida_simple_remove(&counter_ida, counter->id);
+}
+
+static struct device_type counter_device_type = {
+ .name = "counter_device",
+ .release = counter_device_release
+};
+
+static struct bus_type counter_bus_type = {
+ .name = "counter"
+};
+
+/**
+ * counter_register - register Counter to the system
+ * @counter: pointer to Counter to register
+ *
+ * This function registers a Counter to the system. A sysfs "counter" directory
+ * will be created and populated with sysfs attributes correlating with the
+ * Counter Signals, Synapses, and Counts respectively.
+ */
+int counter_register(struct counter_device *const counter)
+{
+ struct device *const dev = &counter->dev;
+ int err;
+
+ /* Acquire unique ID */
+ counter->id = ida_simple_get(&counter_ida, 0, 0, GFP_KERNEL);
+ if (counter->id < 0)
+ return counter->id;
+
+ /* Configure device structure for Counter */
+ dev->type = &counter_device_type;
+ dev->bus = &counter_bus_type;
+ if (counter->parent) {
+ dev->parent = counter->parent;
+ dev->of_node = counter->parent->of_node;
+ }
+ dev_set_name(dev, "counter%d", counter->id);
+ device_initialize(dev);
+ dev_set_drvdata(dev, counter);
+
+ /* Add Counter sysfs attributes */
+ err = counter_sysfs_add(counter);
+ if (err)
+ goto err_free_id;
+
+ /* Add device to system */
+ err = device_add(dev);
+ if (err)
+ goto err_free_sysfs;
+
+ return 0;
+
+err_free_sysfs:
+ counter_sysfs_free(counter);
+err_free_id:
+ ida_simple_remove(&counter_ida, counter->id);
+ return err;
+}
+EXPORT_SYMBOL_GPL(counter_register);
+
+/**
+ * counter_unregister - unregister Counter from the system
+ * @counter: pointer to Counter to unregister
+ *
+ * The Counter is unregistered from the system; all allocated memory is freed.
+ */
+void counter_unregister(struct counter_device *const counter)
+{
+ if (counter) {
+ device_del(&counter->dev);
+ counter_sysfs_free(counter);
+ }
+}
+EXPORT_SYMBOL_GPL(counter_unregister);
+
+static void devm_counter_unreg(struct device *dev, void *res)
+{
+ counter_unregister(*(struct counter_device **)res);
+}
+
+/**
+ * devm_counter_register - Resource-managed counter_register
+ * @dev: device to allocate counter_device for
+ * @counter: pointer to Counter to register
+ *
+ * Managed counter_register. The Counter registered with this function is
+ * automatically unregistered on driver detach. This function calls
+ * counter_register internally. Refer to that function for more information.
+ *
+ * If an Counter registered with this function needs to be unregistered
+ * separately, devm_counter_unregister must be used.
+ *
+ * RETURNS:
+ * 0 on success, negative error number on failure.
+ */
+int devm_counter_register(struct device *dev,
+ struct counter_device *const counter)
+{
+ struct counter_device **ptr;
+ int ret;
+
+ ptr = devres_alloc(devm_counter_unreg, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return -ENOMEM;
+
+ ret = counter_register(counter);
+ if (!ret) {
+ *ptr = counter;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devm_counter_register);
+
+static int devm_counter_match(struct device *dev, void *res, void *data)
+{
+ struct counter_device **r = res;
+
+ if (!r || !*r) {
+ WARN_ON(!r || !*r);
+ return 0;
+ }
+
+ return *r == data;
+}
+
+/**
+ * devm_counter_unregister - Resource-managed counter_unregister
+ * @dev: device this counter_device belongs to
+ * @counter: pointer to Counter associated with the device
+ *
+ * Unregister Counter registered with devm_counter_register.
+ */
+void devm_counter_unregister(struct device *dev,
+ struct counter_device *const counter)
+{
+ int rc;
+
+ rc = devres_release(dev, devm_counter_unreg, devm_counter_match,
+ counter);
+ WARN_ON(rc);
+}
+EXPORT_SYMBOL_GPL(devm_counter_unregister);
+
+static int __init counter_init(void)
+{
+ return bus_register(&counter_bus_type);
+}
+
+static void __exit counter_exit(void)
+{
+ bus_unregister(&counter_bus_type);
+}
+
+subsys_initcall(counter_init);
+module_exit(counter_exit);
+
+MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@xxxxxxxxx>");
+MODULE_DESCRIPTION("Generic Counter interface");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/counter/counter-function-types.h b/drivers/counter/counter-function-types.h
new file mode 100644
index 000000000000..1a67b3904193
--- /dev/null
+++ b/drivers/counter/counter-function-types.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Counter callback function types
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#ifndef _COUNTER_FUNCTION_TYPES_H_
+#define _COUNTER_FUNCTION_TYPES_H_
+
+#include <linux/counter.h>
+#include <linux/types.h>
+
+#define COUNTER_DATA_CALLBACKS(_name, _type) \
+ typedef int (*counter_count_##_name##_read)(struct counter_device *, \
+ struct counter_count *, \
+ _type *); \
+ typedef int (*counter_count_##_name##_write)(struct counter_device *, \
+ struct counter_count *, \
+ _type); \
+ typedef int (*counter_device_##_name##_read)(struct counter_device *, \
+ _type *); \
+ typedef int (*counter_device_##_name##_write)(struct counter_device *, \
+ _type); \
+ typedef int (*counter_signal_##_name##_read)(struct counter_device *, \
+ struct counter_signal *, \
+ _type *); \
+ typedef int (*counter_signal_##_name##_write)(struct counter_device *, \
+ struct counter_signal *, \
+ _type)
+
+COUNTER_DATA_CALLBACKS(bool, bool);
+COUNTER_DATA_CALLBACKS(lu, unsigned long);
+COUNTER_DATA_CALLBACKS(zu, size_t);
+
+typedef ssize_t (*counter_count_s_read)(struct counter_device *,
+ struct counter_count *, char *, size_t);
+typedef ssize_t (*counter_count_s_write)(struct counter_device *,
+ struct counter_count *, const char *,
+ size_t);
+typedef ssize_t (*counter_device_s_read)(struct counter_device *, char *,
+ size_t);
+typedef ssize_t (*counter_device_s_write)(struct counter_device *, const char *,
+ size_t);
+typedef ssize_t (*counter_signal_s_read)(struct counter_device *,
+ struct counter_signal *, char *,
+ size_t);
+typedef ssize_t (*counter_signal_s_write)(struct counter_device *,
+ struct counter_signal *, const char *,
+ size_t);
+
+typedef int (*counter_count_function_read)(struct counter_device *,
+ struct counter_count *,
+ enum counter_count_function *);
+typedef int (*counter_count_function_write)(struct counter_device *,
+ struct counter_count *,
+ enum counter_count_function);
+
+typedef int (*counter_signal_signal_read)(struct counter_device *,
+ struct counter_signal *,
+ enum counter_signal_value *);
+
+typedef int (*counter_synapse_action_read)(struct counter_device *,
+ struct counter_count *,
+ struct counter_synapse *,
+ enum counter_synapse_action *);
+typedef int (*counter_synapse_action_write)(struct counter_device *,
+ struct counter_count *,
+ struct counter_synapse *,
+ enum counter_synapse_action);
+
+typedef int (*counter_count_direction_read)(struct counter_device *,
+ struct counter_count *,
+ enum counter_count_direction *);
+
+typedef int (*counter_count_mode_read)(struct counter_device *,
+ struct counter_count *,
+ enum counter_count_mode *);
+typedef int (*counter_count_mode_write)(struct counter_device *,
+ struct counter_count *,
+ enum counter_count_mode);
+
+#endif /* _COUNTER_FUNCTION_TYPES_H_ */
diff --git a/drivers/counter/counter-strings.h b/drivers/counter/counter-strings.h
new file mode 100644
index 000000000000..d67788e01bb9
--- /dev/null
+++ b/drivers/counter/counter-strings.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Generic Counter strings
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#ifndef _COUNTER_STRINGS_H_
+#define _COUNTER_STRINGS_H_
+
+#include <linux/counter.h>
+
+const char *const counter_count_direction_str[] = {
+ [COUNTER_COUNT_DIRECTION_FORWARD] = "forward",
+ [COUNTER_COUNT_DIRECTION_BACKWARD] = "backward"
+};
+
+const char *const counter_count_function_str[] = {
+ [COUNTER_COUNT_FUNCTION_INCREASE] = "increase",
+ [COUNTER_COUNT_FUNCTION_DECREASE] = "decrease",
+ [COUNTER_COUNT_FUNCTION_PULSE_DIRECTION] = "pulse-direction",
+ [COUNTER_COUNT_FUNCTION_QUADRATURE_X1_A] = "quadrature x1 a",
+ [COUNTER_COUNT_FUNCTION_QUADRATURE_X1_B] = "quadrature x1 b",
+ [COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A] = "quadrature x2 a",
+ [COUNTER_COUNT_FUNCTION_QUADRATURE_X2_B] = "quadrature x2 b",
+ [COUNTER_COUNT_FUNCTION_QUADRATURE_X4] = "quadrature x4"
+};
+
+const char *const counter_count_mode_str[] = {
+ [COUNTER_COUNT_MODE_NORMAL] = "normal",
+ [COUNTER_COUNT_MODE_RANGE_LIMIT] = "range limit",
+ [COUNTER_COUNT_MODE_NON_RECYCLE] = "non-recycle",
+ [COUNTER_COUNT_MODE_MODULO_N] = "modulo-n"
+};
+
+const char *const counter_signal_value_str[] = {
+ [COUNTER_SIGNAL_LOW] = "low",
+ [COUNTER_SIGNAL_HIGH] = "high"
+};
+
+const char *const counter_synapse_action_str[] = {
+ [COUNTER_SYNAPSE_ACTION_NONE] = "none",
+ [COUNTER_SYNAPSE_ACTION_RISING_EDGE] = "rising edge",
+ [COUNTER_SYNAPSE_ACTION_FALLING_EDGE] = "falling edge",
+ [COUNTER_SYNAPSE_ACTION_BOTH_EDGES] = "both edges"
+};
+
+#endif /* _COUNTER_STRINGS_H_ */
diff --git a/drivers/counter/counter-sysfs-callbacks.c b/drivers/counter/counter-sysfs-callbacks.c
new file mode 100644
index 000000000000..5740d61e999b
--- /dev/null
+++ b/drivers/counter/counter-sysfs-callbacks.c
@@ -0,0 +1,566 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic Counter sysfs callbacks
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#include <linux/counter.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+#include "counter-function-types.h"
+#include "counter-strings.h"
+#include "counter-sysfs-callbacks.h"
+
+#define to_counter_attribute(_dev_attr) \
+ container_of(_dev_attr, struct counter_attribute, dev_attr)
+
+static ssize_t counter_data_bool_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_bool_read count_bool_read = a->data.read;
+ const counter_device_bool_read device_bool_read = a->data.read;
+ const counter_signal_bool_read signal_bool_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ void *const owner = a->owner;
+ int err = 0;
+ bool data;
+
+ switch (a->type) {
+ case COUNTER_OWNER_TYPE_COUNT:
+ err = count_bool_read(counter, owner, &data);
+ break;
+ case COUNTER_OWNER_TYPE_DEVICE:
+ err = device_bool_read(counter, &data);
+ break;
+ case COUNTER_OWNER_TYPE_SIGNAL:
+ err = signal_bool_read(counter, owner, &data);
+ break;
+ }
+ if (err)
+ return err;
+
+ return sprintf(buf, "%u\n", (unsigned int)data);
+}
+
+static ssize_t counter_data_bool_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_bool_write count_bool_write = a->data.write;
+ const counter_device_bool_write device_bool_write = a->data.write;
+ const counter_signal_bool_write signal_bool_write = a->data.write;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ void *const owner = a->owner;
+ int err;
+ bool data;
+
+ err = kstrtobool(buf, &data);
+ if (err)
+ return err;
+
+ switch (a->type) {
+ case COUNTER_OWNER_TYPE_COUNT:
+ err = count_bool_write(counter, owner, data);
+ break;
+ case COUNTER_OWNER_TYPE_DEVICE:
+ err = device_bool_write(counter, data);
+ break;
+ case COUNTER_OWNER_TYPE_SIGNAL:
+ err = signal_bool_write(counter, owner, data);
+ break;
+ }
+ if (err)
+ return err;
+
+ return len;
+}
+
+static ssize_t counter_data_lu_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_lu_read count_lu_read = a->data.read;
+ const counter_device_lu_read device_lu_read = a->data.read;
+ const counter_signal_lu_read signal_lu_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ void *const owner = a->owner;
+ int err = 0;
+ unsigned long data;
+
+ switch (a->type) {
+ case COUNTER_OWNER_TYPE_COUNT:
+ err = count_lu_read(counter, owner, &data);
+ break;
+ case COUNTER_OWNER_TYPE_DEVICE:
+ err = device_lu_read(counter, &data);
+ break;
+ case COUNTER_OWNER_TYPE_SIGNAL:
+ err = signal_lu_read(counter, owner, &data);
+ break;
+ }
+ if (err)
+ return err;
+
+ return sprintf(buf, "%lu\n", data);
+}
+
+static ssize_t counter_data_lu_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_lu_write count_lu_write = a->data.write;
+ const counter_device_lu_write device_lu_write = a->data.write;
+ const counter_signal_lu_write signal_lu_write = a->data.write;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ void *const owner = a->owner;
+ int err;
+ unsigned long data;
+
+ err = kstrtoul(buf, 0, &data);
+ if (err)
+ return err;
+
+ switch (a->type) {
+ case COUNTER_OWNER_TYPE_COUNT:
+ err = count_lu_write(counter, owner, data);
+ break;
+ case COUNTER_OWNER_TYPE_DEVICE:
+ err = device_lu_write(counter, data);
+ break;
+ case COUNTER_OWNER_TYPE_SIGNAL:
+ err = signal_lu_write(counter, owner, data);
+ break;
+ }
+ if (err)
+ return err;
+
+ return len;
+}
+
+static ssize_t counter_data_zu_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_device_zu_read zu_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ int err;
+ size_t data;
+
+ err = zu_read(counter, &data);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%zu\n", data);
+}
+
+static ssize_t counter_data_s_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_s_read count_s_read = a->data.read;
+ const counter_device_s_read device_s_read = a->data.read;
+ const counter_signal_s_read signal_s_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ void *const owner = a->owner;
+
+ switch (a->type) {
+ case COUNTER_OWNER_TYPE_COUNT:
+ return count_s_read(counter, owner, buf, PAGE_SIZE);
+ case COUNTER_OWNER_TYPE_DEVICE:
+ return device_s_read(counter, buf, PAGE_SIZE);
+ case COUNTER_OWNER_TYPE_SIGNAL:
+ return signal_s_read(counter, owner, buf, PAGE_SIZE);
+ }
+
+ return -EINVAL;
+}
+
+static ssize_t counter_data_s_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_s_write count_s_write = a->data.write;
+ const counter_device_s_write device_s_write = a->data.write;
+ const counter_signal_s_write signal_s_write = a->data.write;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ void *const owner = a->owner;
+
+ switch (a->type) {
+ case COUNTER_OWNER_TYPE_COUNT:
+ return count_s_write(counter, owner, buf, len);
+ case COUNTER_OWNER_TYPE_DEVICE:
+ return device_s_write(counter, buf, len);
+ case COUNTER_OWNER_TYPE_SIGNAL:
+ return signal_s_write(counter, owner, buf, len);
+ }
+
+ return -EINVAL;
+}
+
+static ssize_t counter_data_count_function_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_function_read function_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_count *const count = a->owner;
+ int err;
+ enum counter_count_function function;
+
+ err = function_read(counter, count, &function);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%s\n", counter_count_function_str[function]);
+}
+
+static ssize_t counter_data_count_function_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_function_write function_write = a->data.write;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_count *const count = a->owner;
+ const size_t num_functions = count->num_functions;
+ int err;
+ size_t index;
+ enum counter_count_function function;
+
+ /* Find requested function mode */
+ for (index = 0; index < num_functions; index++) {
+ function = count->functions_list[index];
+ if (sysfs_streq(buf, counter_count_function_str[function]))
+ break;
+ }
+ /* If requested function mode not found */
+ if (index >= num_functions)
+ return -EINVAL;
+
+ err = function_write(counter, count, function);
+ if (err)
+ return err;
+
+ return len;
+}
+
+static ssize_t counter_data_count_function_available_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const struct counter_count *const count = a->owner;
+ size_t i;
+ enum counter_count_function function;
+ ssize_t len = 0;
+
+ for (i = 0; i < count->num_functions; i++) {
+ function = count->functions_list[i];
+ len += sprintf(buf + len, "%s\n",
+ counter_count_function_str[function]);
+ }
+
+ return len;
+}
+
+static ssize_t counter_data_signal_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_signal_signal_read signal_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_signal *const signal = a->owner;
+ int err;
+ enum counter_signal_value value;
+
+ err = signal_read(counter, signal, &value);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%s\n", counter_signal_value_str[value]);
+}
+
+static ssize_t counter_data_synapse_action_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_synapse_action_read action_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_count *const count = a->owner;
+ struct counter_synapse *const synapse = a->data.priv;
+ int err;
+ enum counter_synapse_action action;
+
+ err = action_read(counter, count, synapse, &action);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%s\n", counter_synapse_action_str[action]);
+}
+
+static ssize_t counter_data_synapse_action_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_synapse_action_write action_write = a->data.write;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_count *const count = a->owner;
+ struct counter_synapse *const synapse = a->data.priv;
+ const size_t num_actions = synapse->num_actions;
+ int err;
+ size_t index;
+ enum counter_synapse_action action;
+
+ /* Find requested action mode */
+ for (index = 0; index < num_actions; index++) {
+ action = synapse->actions_list[index];
+ if (sysfs_streq(buf, counter_synapse_action_str[action]))
+ break;
+ }
+ /* If requested action mode not found */
+ if (index >= num_actions)
+ return -EINVAL;
+
+ err = action_write(counter, count, synapse, action);
+ if (err)
+ return err;
+
+ return len;
+}
+
+static ssize_t counter_data_synapse_action_available_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const struct counter_synapse *const synapse = a->data.priv;
+ size_t i;
+ enum counter_synapse_action action;
+ ssize_t len = 0;
+
+ for (i = 0; i < synapse->num_actions; i++) {
+ action = synapse->actions_list[i];
+ len += sprintf(buf + len, "%s\n",
+ counter_synapse_action_str[action]);
+ }
+
+ return len;
+}
+
+static ssize_t counter_data_enum_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_zu_read count_enum_read = a->data.read;
+ const counter_device_zu_read device_enum_read = a->data.read;
+ const counter_signal_zu_read signal_enum_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ void *const owner = a->owner;
+ struct counter_enum *const cntr_enum = a->data.priv;
+ int err = 0;
+ size_t index;
+
+ switch (a->type) {
+ case COUNTER_OWNER_TYPE_COUNT:
+ err = count_enum_read(counter, owner, &index);
+ break;
+ case COUNTER_OWNER_TYPE_DEVICE:
+ err = device_enum_read(counter, &index);
+ break;
+ case COUNTER_OWNER_TYPE_SIGNAL:
+ err = signal_enum_read(counter, owner, &index);
+ break;
+ }
+ if (err)
+ return err;
+
+ if (index >= cntr_enum->num_items)
+ return -EINVAL;
+
+ return sprintf(buf, "%s\n", cntr_enum->items[index]);
+}
+
+static ssize_t counter_data_enum_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ struct counter_enum *const cntr_enum = a->data.priv;
+ const size_t num_items = cntr_enum->num_items;
+ const counter_count_zu_write count_enum_write = a->data.write;
+ const counter_device_zu_write device_enum_write = a->data.write;
+ const counter_signal_zu_write signal_enum_write = a->data.write;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ void *const owner = a->owner;
+ ssize_t index;
+ int err = 0;
+
+ index = __sysfs_match_string(cntr_enum->items, num_items, buf);
+ if (index < 0)
+ return index;
+
+ switch (a->type) {
+ case COUNTER_OWNER_TYPE_COUNT:
+ err = count_enum_write(counter, owner, index);
+ break;
+ case COUNTER_OWNER_TYPE_DEVICE:
+ err = device_enum_write(counter, index);
+ break;
+ case COUNTER_OWNER_TYPE_SIGNAL:
+ err = signal_enum_write(counter, owner, index);
+ break;
+ }
+ if (err)
+ return err;
+
+ return len;
+}
+
+static ssize_t counter_data_enum_available_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ struct counter_enum *const cntr_enum = a->data.priv;
+ size_t i;
+ size_t len = 0;
+
+ for (i = 0; i < cntr_enum->num_items; i++)
+ len += sprintf(buf + len, "%s\n", cntr_enum->items[i]);
+
+ return len;
+}
+
+static ssize_t counter_data_count_direction_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_direction_read direction_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_count *const count = a->owner;
+ int err;
+ enum counter_count_direction direction;
+
+ err = direction_read(counter, count, &direction);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%s\n", counter_count_direction_str[direction]);
+}
+
+static ssize_t counter_data_count_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_mode_read count_mode_read = a->data.read;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_count *const count = a->owner;
+ int err;
+ enum counter_count_mode count_mode;
+
+ err = count_mode_read(counter, count, &count_mode);
+ if (err)
+ return err;
+
+ return sprintf(buf, "%s\n", counter_count_mode_str[count_mode]);
+}
+
+static ssize_t counter_data_count_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const counter_count_mode_write count_mode_write = a->data.write;
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_count *const count = a->owner;
+ const struct counter_available *const available = a->data.priv;
+ const enum counter_count_mode *const items = available->items;
+ const size_t num_count_modes = available->num_items;
+ int err;
+ size_t index;
+ enum counter_count_mode count_mode;
+
+ /* Find requested count mode */
+ for (index = 0; index < num_count_modes; index++) {
+ count_mode = items[index];
+ if (sysfs_streq(buf, counter_count_mode_str[count_mode]))
+ break;
+ }
+ /* If requested count mode not found */
+ if (index >= num_count_modes)
+ return -EINVAL;
+
+ err = count_mode_write(counter, count, count_mode);
+ if (err)
+ return err;
+
+ return len;
+}
+
+static ssize_t counter_data_count_mode_available_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const struct counter_available *const available = a->data.priv;
+ const enum counter_count_mode *const items = available->items;
+ size_t i;
+ enum counter_count_mode count_mode;
+ ssize_t len = 0;
+
+ for (i = 0; i < available->num_items; i++) {
+ count_mode = items[i];
+ len += sprintf(buf + len, "%s\n",
+ counter_count_mode_str[count_mode]);
+ }
+
+ return len;
+}
+
+ssize_t (*counter_data_sysfs_show[])(struct device *, struct device_attribute *,
+ char *) = {
+ [COUNTER_DATA_TYPE_BOOL] = counter_data_bool_show,
+ [COUNTER_DATA_TYPE_UNSIGNED_LONG] = counter_data_lu_show,
+ [COUNTER_DATA_TYPE_SIZE] = counter_data_zu_show,
+ [COUNTER_DATA_TYPE_STRING] = counter_data_s_show,
+ [COUNTER_DATA_TYPE_COUNT_FUNCTION] = counter_data_count_function_show,
+ [COUNTER_DATA_TYPE_COUNT_FUNCTION_AVAILABLE] = counter_data_count_function_available_show,
+ [COUNTER_DATA_TYPE_SIGNAL] = counter_data_signal_show,
+ [COUNTER_DATA_TYPE_SYNAPSE_ACTION] = counter_data_synapse_action_show,
+ [COUNTER_DATA_TYPE_SYNAPSE_ACTION_AVAILABLE] = counter_data_synapse_action_available_show,
+ [COUNTER_DATA_TYPE_ENUM] = counter_data_enum_show,
+ [COUNTER_DATA_TYPE_ENUM_AVAILABLE] = counter_data_enum_available_show,
+ [COUNTER_DATA_TYPE_COUNT_DIRECTION] = counter_data_count_direction_show,
+ [COUNTER_DATA_TYPE_COUNT_MODE] = counter_data_count_mode_show,
+ [COUNTER_DATA_TYPE_COUNT_MODE_AVAILABLE] = counter_data_count_mode_available_show,
+};
+
+ssize_t (*counter_data_sysfs_store[])(struct device *,
+ struct device_attribute *, const char *,
+ size_t) = {
+ [COUNTER_DATA_TYPE_BOOL] = counter_data_bool_store,
+ [COUNTER_DATA_TYPE_UNSIGNED_LONG] = counter_data_lu_store,
+ [COUNTER_DATA_TYPE_SIZE] = NULL,
+ [COUNTER_DATA_TYPE_STRING] = counter_data_s_store,
+ [COUNTER_DATA_TYPE_COUNT_FUNCTION] = counter_data_count_function_store,
+ [COUNTER_DATA_TYPE_COUNT_FUNCTION_AVAILABLE] = NULL,
+ [COUNTER_DATA_TYPE_SIGNAL] = NULL,
+ [COUNTER_DATA_TYPE_SYNAPSE_ACTION] = counter_data_synapse_action_store,
+ [COUNTER_DATA_TYPE_SYNAPSE_ACTION_AVAILABLE] = NULL,
+ [COUNTER_DATA_TYPE_ENUM] = counter_data_enum_store,
+ [COUNTER_DATA_TYPE_ENUM_AVAILABLE] = NULL,
+ [COUNTER_DATA_TYPE_COUNT_DIRECTION] = NULL,
+ [COUNTER_DATA_TYPE_COUNT_MODE] = counter_data_count_mode_store,
+ [COUNTER_DATA_TYPE_COUNT_MODE_AVAILABLE] = NULL,
+};
diff --git a/drivers/counter/counter-sysfs-callbacks.h b/drivers/counter/counter-sysfs-callbacks.h
new file mode 100644
index 000000000000..cf44e7c6ed18
--- /dev/null
+++ b/drivers/counter/counter-sysfs-callbacks.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Generic Counter sysfs callbacks
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#ifndef _COUNTER_SYSFS_CALLBACKS_H_
+#define _COUNTER_SYSFS_CALLBACKS_H_
+
+#include <linux/counter.h>
+#include <linux/types.h>
+
+struct counter_attribute {
+ struct device_attribute dev_attr;
+ struct list_head l;
+
+ struct counter_data data;
+ enum counter_owner_type type;
+ void *owner;
+};
+
+extern ssize_t (*counter_data_sysfs_show[])(struct device *,
+ struct device_attribute *, char *);
+
+extern ssize_t (*counter_data_sysfs_store[])(struct device *,
+ struct device_attribute *,
+ const char *, size_t);
+
+#endif /* _COUNTER_SYSFS_CALLBACKS_H_ */
diff --git a/drivers/counter/counter-sysfs.c b/drivers/counter/counter-sysfs.c
new file mode 100644
index 000000000000..ed56c6b52490
--- /dev/null
+++ b/drivers/counter/counter-sysfs.c
@@ -0,0 +1,524 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic Counter sysfs interface
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#include <linux/counter.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gfp.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/types.h>
+
+#include "counter-sysfs-callbacks.h"
+
+static int counter_attribute_create(struct counter_attribute_group *const group,
+ const struct counter_data *const data,
+ const enum counter_owner_type type,
+ void *const owner)
+{
+ struct counter_attribute *counter_attr;
+ struct device_attribute *dev_attr;
+
+ /* Allocate and initialize Counter attribute */
+ counter_attr = kzalloc(sizeof(*counter_attr), GFP_KERNEL);
+ if (!counter_attr)
+ return -ENOMEM;
+ counter_attr->data = *data;
+ counter_attr->type = type;
+ counter_attr->owner = owner;
+
+ /* Configure device attribute */
+ dev_attr = &counter_attr->dev_attr;
+ sysfs_attr_init(&dev_attr->attr);
+ dev_attr->attr.name = data->name;
+ if (data->read) {
+ dev_attr->attr.mode |= 0444;
+ dev_attr->show = counter_data_sysfs_show[data->type];
+ }
+ if (data->write) {
+ dev_attr->attr.mode |= 0200;
+ dev_attr->store = counter_data_sysfs_store[data->type];
+ }
+
+ /* Keep track of the attribute for later cleanup */
+ list_add(&counter_attr->l, &group->attr_list);
+ group->num_attr++;
+
+ return 0;
+}
+
+static struct counter_data counter_signal_data = {
+ .type = COUNTER_DATA_TYPE_SIGNAL,
+ .name = "signal",
+};
+
+static struct counter_data counter_name_data =
+ COUNTER_DATA_STRING("name", NULL, NULL);
+
+static ssize_t counter_signal_name_read(struct counter_device *counter,
+ struct counter_signal *signal,
+ char *buf, size_t size)
+{
+ return snprintf(buf, size, "%s\n", signal->name);
+}
+
+static int counter_signal_attributes_create(
+ struct counter_attribute_group *const group,
+ struct counter_signal *const signal, void *const signal_read)
+{
+ const enum counter_owner_type type = COUNTER_OWNER_TYPE_SIGNAL;
+ int err;
+ struct counter_data data;
+ size_t i;
+ const struct counter_data *ext;
+
+ /* Create main Signal attribute */
+ data = counter_signal_data;
+ data.read = signal_read;
+ err = counter_attribute_create(group, &data, type, signal);
+ if (err)
+ return err;
+
+ /* Create Signal name attribute */
+ data = counter_name_data;
+ data.read = counter_signal_name_read;
+ err = counter_attribute_create(group, &data, type, signal);
+ if (err)
+ return err;
+
+ /* Create an attribute for each extension */
+ for (i = 0; i < signal->num_ext; i++) {
+ ext = signal->ext + i;
+ err = counter_attribute_create(group, ext, type, signal);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int counter_signals_register(
+ struct counter_attribute_group *const groups_list,
+ const struct counter_device *const counter)
+{
+ void *const signal_read = counter->signal_read;
+ size_t i;
+ struct counter_signal *signal;
+ const char *name;
+ int err;
+
+ /* Register each Signal */
+ for (i = 0; i < counter->num_signals; i++) {
+ signal = counter->signals + i;
+
+ /* Generate Signal attribute directory name */
+ name = kasprintf(GFP_KERNEL, "signal%d", signal->id);
+ if (!name)
+ return -ENOMEM;
+ groups_list[i].attr_group.name = name;
+
+ /* Create all attributes associated with Signal */
+ err = counter_signal_attributes_create(groups_list + i, signal,
+ signal_read);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+struct counter_synapse_name {
+ struct list_head l;
+ const char *name;
+};
+
+static int counter_synapses_register(
+ struct counter_attribute_group *const group,
+ struct counter_device *const counter, struct counter_count *const count)
+{
+ const enum counter_owner_type type = COUNTER_OWNER_TYPE_COUNT;
+ size_t i;
+ struct counter_synapse *synapse;
+ int id;
+ struct counter_synapse_name *name;
+ struct counter_data data;
+ int err;
+
+ /* Register each Synapse */
+ for (i = 0; i < count->num_synapses; i++) {
+ synapse = count->synapses + i;
+ id = synapse->signal->id;
+
+ /* Generate Synapse name list item */
+ name = kmalloc(sizeof(*name), GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
+ list_add(&name->l, &counter->synapse_names_list);
+
+ /* Generate Synapse action name */
+ name->name = kasprintf(GFP_KERNEL, "signal%d_action", id);
+ if (!name->name)
+ return -ENOMEM;
+
+ /* Create action attribute */
+ data.type = COUNTER_DATA_TYPE_SYNAPSE_ACTION;
+ data.name = name->name;
+ data.read = counter->action_read;
+ data.write = counter->action_write;
+ data.priv = synapse;
+ err = counter_attribute_create(group, &data, type, count);
+ if (err)
+ return err;
+
+ /* Generate Synapse action_available name */
+ name->name = kasprintf(GFP_KERNEL, "signal%d_action_available",
+ id);
+ if (!name->name)
+ return -ENOMEM;
+
+ /* Create action_available attribute */
+ data.type = COUNTER_DATA_TYPE_SYNAPSE_ACTION_AVAILABLE;
+ data.name = name->name;
+ data.read = counter->action_read;
+ data.priv = synapse;
+ err = counter_attribute_create(group, &data, type, count);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static struct counter_data counter_count_data =
+ COUNTER_DATA_UNSIGNED_LONG("count", NULL, NULL);
+
+static ssize_t counter_count_name_read(struct counter_device *counter,
+ struct counter_count *count, char *buf,
+ size_t size)
+{
+ return snprintf(buf, size, "%s\n", count->name);
+}
+
+static struct counter_data counter_count_function_data = {
+ .type = COUNTER_DATA_TYPE_COUNT_FUNCTION,
+ .name = "function",
+};
+
+static struct counter_data counter_count_function_available_data = {
+ .type = COUNTER_DATA_TYPE_COUNT_FUNCTION_AVAILABLE,
+ .name = "function_available",
+};
+
+static int counter_count_attributes_create(
+ struct counter_attribute_group *const group,
+ const struct counter_device *const counter,
+ struct counter_count *const count)
+{
+ const enum counter_owner_type type = COUNTER_OWNER_TYPE_COUNT;
+ int err;
+ struct counter_data data;
+ size_t i;
+ const struct counter_data *ext;
+
+ /* Create main Count attribute */
+ data = counter_count_data;
+ data.read = counter->count_read;
+ data.write = counter->count_write;
+ err = counter_attribute_create(group, &data, type, count);
+ if (err)
+ return err;
+
+ /* Create Count name attribute */
+ data = counter_name_data;
+ data.read = counter_count_name_read;
+ err = counter_attribute_create(group, &data, type, count);
+ if (err)
+ return err;
+
+ /* Create Count function attribute */
+ data = counter_count_function_data;
+ data.read = counter->function_read;
+ data.write = counter->function_write;
+ err = counter_attribute_create(group, &data, type, count);
+ if (err)
+ return err;
+
+ /* Create Count function_available attribute */
+ data = counter_count_function_available_data;
+ data.read = counter->function_read;
+ err = counter_attribute_create(group, &data, type, count);
+ if (err)
+ return err;
+
+ /* Create an attribute for each extension */
+ for (i = 0; i < count->num_ext; i++) {
+ ext = count->ext + i;
+ err = counter_attribute_create(group, ext, type, count);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int counter_counts_register(
+ struct counter_attribute_group *const groups_list,
+ struct counter_device *const counter)
+{
+ size_t i;
+ struct counter_count *count;
+ const char *name;
+ int err;
+
+ /* Register each Count */
+ for (i = 0; i < counter->num_counts; i++) {
+ count = counter->counts + i;
+
+ /* Generate Count attribute directory name */
+ name = kasprintf(GFP_KERNEL, "count%d", count->id);
+ if (!name)
+ return -ENOMEM;
+ groups_list[i].attr_group.name = name;
+
+ /* Register the Synapses associated with each Count */
+ err = counter_synapses_register(groups_list + i, counter,
+ count);
+ if (err)
+ return err;
+
+ /* Create all attributes associated with Count */
+ err = counter_count_attributes_create(groups_list + i, counter,
+ count);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static ssize_t counter_name_read(struct counter_device *counter, char *buf,
+ size_t size)
+{
+ return snprintf(buf, size, "%s\n", counter->name);
+}
+
+static int counter_num_signals_read(struct counter_device *counter, size_t *val)
+{
+ *val = counter->num_signals;
+ return 0;
+}
+
+static int counter_num_counts_read(struct counter_device *counter, size_t *val)
+{
+ *val = counter->num_counts;
+ return 0;
+}
+
+#define COUNTER_DATA_SIZE(_name, _read) \
+{ \
+ .type = COUNTER_DATA_TYPE_SIZE, \
+ .name = (_name), \
+ .read = (_read), \
+}
+
+static struct counter_data counter_num_signals_data =
+ COUNTER_DATA_SIZE("num_signals", counter_num_signals_read);
+
+static struct counter_data counter_num_counts_data =
+ COUNTER_DATA_SIZE("num_counts", counter_num_counts_read);
+
+static void counter_groups_list_free(struct counter_device *const counter)
+{
+ struct counter_attribute_group *group;
+ struct counter_attribute *p, *n;
+
+ /* Loop through all attribute groups (signals, counts, device, etc.) */
+ while (counter->num_groups--) {
+ group = counter->groups_list + counter->num_groups;
+
+ /* Free all attribute group and associated attributes memory */
+ kfree(group->attr_group.name);
+ kfree(group->attr_group.attrs);
+
+ /* Free attribute list */
+ list_for_each_entry_safe(p, n, &group->attr_list, l)
+ kfree(p);
+ }
+
+ kfree(counter->groups_list);
+}
+
+static int counter_device_register(struct counter_attribute_group *group,
+ struct counter_device *const counter)
+{
+ const enum counter_owner_type type = COUNTER_OWNER_TYPE_DEVICE;
+ struct counter_data data;
+ int err;
+ size_t i;
+ const struct counter_data *ext;
+
+ /* Register Signals */
+ err = counter_signals_register(group, counter);
+ if (err)
+ goto err_free_groups_list;
+ group += counter->num_signals;
+
+ /* Register Counts and respective Synapses */
+ err = counter_counts_register(group, counter);
+ if (err)
+ goto err_free_groups_list;
+ group += counter->num_counts;
+
+ /* Create name attribute */
+ data = counter_name_data;
+ data.read = counter_name_read;
+ err = counter_attribute_create(group, &data, type, NULL);
+ if (err)
+ goto err_free_groups_list;
+
+ /* Create num_signals attribute */
+ data = counter_num_signals_data;
+ err = counter_attribute_create(group, &data, type, NULL);
+ if (err)
+ goto err_free_groups_list;
+
+ /* Create num_counts attribute */
+ data = counter_num_counts_data;
+ err = counter_attribute_create(group, &data, type, NULL);
+ if (err)
+ goto err_free_groups_list;
+
+ /* Create an attribute for each extension */
+ for (i = 0; i < counter->num_ext; i++) {
+ ext = counter->ext + i;
+ err = counter_attribute_create(group, ext, type, NULL);
+ if (err)
+ goto err_free_groups_list;
+ }
+
+ return 0;
+
+err_free_groups_list:
+ counter_groups_list_free(counter);
+ return err;
+}
+
+static int counter_groups_list_prepare(struct counter_device *const counter)
+{
+ const size_t num_grps = counter->num_signals + counter->num_counts + 1;
+ struct counter_attribute_group *groups_list;
+ size_t i;
+ int err;
+
+ /* Allocate space for attribute groups (signals, counts, and ext) */
+ groups_list = kcalloc(num_grps, sizeof(*groups_list), GFP_KERNEL);
+ if (!groups_list)
+ return -ENOMEM;
+
+ /* Store groups_list in counter structure */
+ counter->groups_list = groups_list;
+ counter->num_groups = num_grps;
+
+ /* Initialize attribute lists */
+ for (i = 0; i < num_grps; i++)
+ INIT_LIST_HEAD(&groups_list[i].attr_list);
+
+ /* Register Counter device attributes */
+ err = counter_device_register(groups_list, counter);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int counter_groups_prepare(struct counter_device *const counter)
+{
+ size_t i, j;
+ struct counter_attribute_group *group;
+ struct attribute **attrs;
+ int err;
+ struct counter_attribute *p;
+
+ /* Allocate attribute groups for association with device */
+ counter->groups = kcalloc(counter->num_groups + 1,
+ sizeof(*counter->groups), GFP_KERNEL);
+ if (!counter->groups)
+ return -ENOMEM;
+
+ /* Prepare each group of attributes for association */
+ for (i = 0; i < counter->num_groups; i++) {
+ group = counter->groups_list + i;
+
+ /* Allocate space for attribute pointers */
+ attrs = kcalloc(group->num_attr + 1, sizeof(*attrs),
+ GFP_KERNEL);
+ if (!attrs) {
+ err = -ENOMEM;
+ goto err_free_groups;
+ }
+ group->attr_group.attrs = attrs;
+
+ /* Add attribute pointers to attribute group */
+ j = 0;
+ list_for_each_entry(p, &group->attr_list, l)
+ attrs[j++] = &p->dev_attr.attr;
+
+ /* Group attributes in attribute group */
+ counter->groups[i] = &group->attr_group;
+ }
+ /* Associate attributes with device */
+ counter->dev.groups = counter->groups;
+
+ return 0;
+
+err_free_groups:
+ kfree(counter->groups);
+ return err;
+}
+
+static void counter_synapse_names_free(struct list_head *const names_list)
+{
+ struct counter_synapse_name *p, *n;
+
+ list_for_each_entry_safe(p, n, names_list, l) {
+ kfree(p->name);
+ kfree(p);
+ }
+}
+
+int counter_sysfs_add(struct counter_device *const counter)
+{
+ int err;
+
+ /* Initialize Synapse names list */
+ INIT_LIST_HEAD(&counter->synapse_names_list);
+
+ /* Prepare device attributes */
+ err = counter_groups_list_prepare(counter);
+ if (err)
+ goto err_free_synapse_names;
+
+ /* Organize device attributes to groups and match to device */
+ err = counter_groups_prepare(counter);
+ if (err)
+ goto err_free_groups_list;
+
+ return 0;
+
+err_free_groups_list:
+ counter_groups_list_free(counter);
+err_free_synapse_names:
+ counter_synapse_names_free(&counter->synapse_names_list);
+ return err;
+}
+
+void counter_sysfs_free(struct counter_device *const counter)
+{
+ kfree(counter->groups);
+ counter_groups_list_free(counter);
+ counter_synapse_names_free(&counter->synapse_names_list);
+}
diff --git a/drivers/counter/counter-sysfs.h b/drivers/counter/counter-sysfs.h
new file mode 100644
index 000000000000..00e7cd6ea083
--- /dev/null
+++ b/drivers/counter/counter-sysfs.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Counter sysfs interface
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#ifndef _COUNTER_SYSFS_H_
+#define _COUNTER_SYSFS_H_
+
+#include <linux/counter.h>
+
+int counter_sysfs_add(struct counter_device *const counter);
+void counter_sysfs_free(struct counter_device *const counter);
+
+#endif /* _COUNTER_SYSFS_H_ */
diff --git a/drivers/counter/counter.c b/drivers/counter/counter.c
deleted file mode 100644
index 6a683d086008..000000000000
--- a/drivers/counter/counter.c
+++ /dev/null
@@ -1,1496 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Generic Counter interface
- * Copyright (C) 2018 William Breathitt Gray
- */
-#include <linux/counter.h>
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/export.h>
-#include <linux/fs.h>
-#include <linux/gfp.h>
-#include <linux/idr.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/printk.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/sysfs.h>
-#include <linux/types.h>
-
-const char *const counter_count_direction_str[2] = {
- [COUNTER_COUNT_DIRECTION_FORWARD] = "forward",
- [COUNTER_COUNT_DIRECTION_BACKWARD] = "backward"
-};
-EXPORT_SYMBOL_GPL(counter_count_direction_str);
-
-const char *const counter_count_mode_str[4] = {
- [COUNTER_COUNT_MODE_NORMAL] = "normal",
- [COUNTER_COUNT_MODE_RANGE_LIMIT] = "range limit",
- [COUNTER_COUNT_MODE_NON_RECYCLE] = "non-recycle",
- [COUNTER_COUNT_MODE_MODULO_N] = "modulo-n"
-};
-EXPORT_SYMBOL_GPL(counter_count_mode_str);
-
-ssize_t counter_signal_enum_read(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- char *buf)
-{
- const struct counter_signal_enum_ext *const e = priv;
- int err;
- size_t index;
-
- if (!e->get)
- return -EINVAL;
-
- err = e->get(counter, signal, &index);
- if (err)
- return err;
-
- if (index >= e->num_items)
- return -EINVAL;
-
- return sprintf(buf, "%s\n", e->items[index]);
-}
-EXPORT_SYMBOL_GPL(counter_signal_enum_read);
-
-ssize_t counter_signal_enum_write(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- const char *buf, size_t len)
-{
- const struct counter_signal_enum_ext *const e = priv;
- ssize_t index;
- int err;
-
- if (!e->set)
- return -EINVAL;
-
- index = __sysfs_match_string(e->items, e->num_items, buf);
- if (index < 0)
- return index;
-
- err = e->set(counter, signal, index);
- if (err)
- return err;
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_signal_enum_write);
-
-ssize_t counter_signal_enum_available_read(struct counter_device *counter,
- struct counter_signal *signal,
- void *priv, char *buf)
-{
- const struct counter_signal_enum_ext *const e = priv;
- size_t i;
- size_t len = 0;
-
- if (!e->num_items)
- return 0;
-
- for (i = 0; i < e->num_items; i++)
- len += sprintf(buf + len, "%s\n", e->items[i]);
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_signal_enum_available_read);
-
-ssize_t counter_count_enum_read(struct counter_device *counter,
- struct counter_count *count, void *priv,
- char *buf)
-{
- const struct counter_count_enum_ext *const e = priv;
- int err;
- size_t index;
-
- if (!e->get)
- return -EINVAL;
-
- err = e->get(counter, count, &index);
- if (err)
- return err;
-
- if (index >= e->num_items)
- return -EINVAL;
-
- return sprintf(buf, "%s\n", e->items[index]);
-}
-EXPORT_SYMBOL_GPL(counter_count_enum_read);
-
-ssize_t counter_count_enum_write(struct counter_device *counter,
- struct counter_count *count, void *priv,
- const char *buf, size_t len)
-{
- const struct counter_count_enum_ext *const e = priv;
- ssize_t index;
- int err;
-
- if (!e->set)
- return -EINVAL;
-
- index = __sysfs_match_string(e->items, e->num_items, buf);
- if (index < 0)
- return index;
-
- err = e->set(counter, count, index);
- if (err)
- return err;
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_count_enum_write);
-
-ssize_t counter_count_enum_available_read(struct counter_device *counter,
- struct counter_count *count,
- void *priv, char *buf)
-{
- const struct counter_count_enum_ext *const e = priv;
- size_t i;
- size_t len = 0;
-
- if (!e->num_items)
- return 0;
-
- for (i = 0; i < e->num_items; i++)
- len += sprintf(buf + len, "%s\n", e->items[i]);
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_count_enum_available_read);
-
-ssize_t counter_device_enum_read(struct counter_device *counter, void *priv,
- char *buf)
-{
- const struct counter_device_enum_ext *const e = priv;
- int err;
- size_t index;
-
- if (!e->get)
- return -EINVAL;
-
- err = e->get(counter, &index);
- if (err)
- return err;
-
- if (index >= e->num_items)
- return -EINVAL;
-
- return sprintf(buf, "%s\n", e->items[index]);
-}
-EXPORT_SYMBOL_GPL(counter_device_enum_read);
-
-ssize_t counter_device_enum_write(struct counter_device *counter, void *priv,
- const char *buf, size_t len)
-{
- const struct counter_device_enum_ext *const e = priv;
- ssize_t index;
- int err;
-
- if (!e->set)
- return -EINVAL;
-
- index = __sysfs_match_string(e->items, e->num_items, buf);
- if (index < 0)
- return index;
-
- err = e->set(counter, index);
- if (err)
- return err;
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_device_enum_write);
-
-ssize_t counter_device_enum_available_read(struct counter_device *counter,
- void *priv, char *buf)
-{
- const struct counter_device_enum_ext *const e = priv;
- size_t i;
- size_t len = 0;
-
- if (!e->num_items)
- return 0;
-
- for (i = 0; i < e->num_items; i++)
- len += sprintf(buf + len, "%s\n", e->items[i]);
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_device_enum_available_read);
-
-struct counter_attr_parm {
- struct counter_device_attr_group *group;
- const char *prefix;
- const char *name;
- ssize_t (*show)(struct device *dev, struct device_attribute *attr,
- char *buf);
- ssize_t (*store)(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t len);
- void *component;
-};
-
-struct counter_device_attr {
- struct device_attribute dev_attr;
- struct list_head l;
- void *component;
-};
-
-static int counter_attribute_create(const struct counter_attr_parm *const parm)
-{
- struct counter_device_attr *counter_attr;
- struct device_attribute *dev_attr;
- int err;
- struct list_head *const attr_list = &parm->group->attr_list;
-
- /* Allocate a Counter device attribute */
- counter_attr = kzalloc(sizeof(*counter_attr), GFP_KERNEL);
- if (!counter_attr)
- return -ENOMEM;
- dev_attr = &counter_attr->dev_attr;
-
- sysfs_attr_init(&dev_attr->attr);
-
- /* Configure device attribute */
- dev_attr->attr.name = kasprintf(GFP_KERNEL, "%s%s", parm->prefix,
- parm->name);
- if (!dev_attr->attr.name) {
- err = -ENOMEM;
- goto err_free_counter_attr;
- }
- if (parm->show) {
- dev_attr->attr.mode |= 0444;
- dev_attr->show = parm->show;
- }
- if (parm->store) {
- dev_attr->attr.mode |= 0200;
- dev_attr->store = parm->store;
- }
-
- /* Store associated Counter component with attribute */
- counter_attr->component = parm->component;
-
- /* Keep track of the attribute for later cleanup */
- list_add(&counter_attr->l, attr_list);
- parm->group->num_attr++;
-
- return 0;
-
-err_free_counter_attr:
- kfree(counter_attr);
- return err;
-}
-
-#define to_counter_attr(_dev_attr) \
- container_of(_dev_attr, struct counter_device_attr, dev_attr)
-
-struct counter_signal_unit {
- struct counter_signal *signal;
-};
-
-static const char *const counter_signal_value_str[] = {
- [COUNTER_SIGNAL_LOW] = "low",
- [COUNTER_SIGNAL_HIGH] = "high"
-};
-
-static ssize_t counter_signal_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_signal_unit *const component = devattr->component;
- struct counter_signal *const signal = component->signal;
- int err;
- enum counter_signal_value val;
-
- err = counter->ops->signal_read(counter, signal, &val);
- if (err)
- return err;
-
- return sprintf(buf, "%s\n", counter_signal_value_str[val]);
-}
-
-struct counter_name_unit {
- const char *name;
-};
-
-static ssize_t counter_device_attr_name_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- const struct counter_name_unit *const comp = to_counter_attr(attr)->component;
-
- return sprintf(buf, "%s\n", comp->name);
-}
-
-static int counter_name_attribute_create(
- struct counter_device_attr_group *const group,
- const char *const name)
-{
- struct counter_name_unit *name_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Skip if no name */
- if (!name)
- return 0;
-
- /* Allocate name attribute component */
- name_comp = kmalloc(sizeof(*name_comp), GFP_KERNEL);
- if (!name_comp)
- return -ENOMEM;
- name_comp->name = name;
-
- /* Allocate Signal name attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "name";
- parm.show = counter_device_attr_name_show;
- parm.store = NULL;
- parm.component = name_comp;
- err = counter_attribute_create(&parm);
- if (err)
- goto err_free_name_comp;
-
- return 0;
-
-err_free_name_comp:
- kfree(name_comp);
- return err;
-}
-
-struct counter_signal_ext_unit {
- struct counter_signal *signal;
- const struct counter_signal_ext *ext;
-};
-
-static ssize_t counter_signal_ext_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_signal_ext_unit *const comp = devattr->component;
- const struct counter_signal_ext *const ext = comp->ext;
-
- return ext->read(dev_get_drvdata(dev), comp->signal, ext->priv, buf);
-}
-
-static ssize_t counter_signal_ext_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_signal_ext_unit *const comp = devattr->component;
- const struct counter_signal_ext *const ext = comp->ext;
-
- return ext->write(dev_get_drvdata(dev), comp->signal, ext->priv, buf,
- len);
-}
-
-static void counter_device_attr_list_free(struct list_head *attr_list)
-{
- struct counter_device_attr *p, *n;
-
- list_for_each_entry_safe(p, n, attr_list, l) {
- /* free attribute name and associated component memory */
- kfree(p->dev_attr.attr.name);
- kfree(p->component);
- list_del(&p->l);
- kfree(p);
- }
-}
-
-static int counter_signal_ext_register(
- struct counter_device_attr_group *const group,
- struct counter_signal *const signal)
-{
- const size_t num_ext = signal->num_ext;
- size_t i;
- const struct counter_signal_ext *ext;
- struct counter_signal_ext_unit *signal_ext_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Create an attribute for each extension */
- for (i = 0 ; i < num_ext; i++) {
- ext = signal->ext + i;
-
- /* Allocate signal_ext attribute component */
- signal_ext_comp = kmalloc(sizeof(*signal_ext_comp), GFP_KERNEL);
- if (!signal_ext_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
- signal_ext_comp->signal = signal;
- signal_ext_comp->ext = ext;
-
- /* Allocate a Counter device attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = ext->name;
- parm.show = (ext->read) ? counter_signal_ext_show : NULL;
- parm.store = (ext->write) ? counter_signal_ext_store : NULL;
- parm.component = signal_ext_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(signal_ext_comp);
- goto err_free_attr_list;
- }
- }
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static int counter_signal_attributes_create(
- struct counter_device_attr_group *const group,
- const struct counter_device *const counter,
- struct counter_signal *const signal)
-{
- struct counter_signal_unit *signal_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Allocate Signal attribute component */
- signal_comp = kmalloc(sizeof(*signal_comp), GFP_KERNEL);
- if (!signal_comp)
- return -ENOMEM;
- signal_comp->signal = signal;
-
- /* Create main Signal attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "signal";
- parm.show = (counter->ops->signal_read) ? counter_signal_show : NULL;
- parm.store = NULL;
- parm.component = signal_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(signal_comp);
- return err;
- }
-
- /* Create Signal name attribute */
- err = counter_name_attribute_create(group, signal->name);
- if (err)
- goto err_free_attr_list;
-
- /* Register Signal extension attributes */
- err = counter_signal_ext_register(group, signal);
- if (err)
- goto err_free_attr_list;
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static int counter_signals_register(
- struct counter_device_attr_group *const groups_list,
- const struct counter_device *const counter)
-{
- const size_t num_signals = counter->num_signals;
- size_t i;
- struct counter_signal *signal;
- const char *name;
- int err;
-
- /* Register each Signal */
- for (i = 0; i < num_signals; i++) {
- signal = counter->signals + i;
-
- /* Generate Signal attribute directory name */
- name = kasprintf(GFP_KERNEL, "signal%d", signal->id);
- if (!name) {
- err = -ENOMEM;
- goto err_free_attr_groups;
- }
- groups_list[i].attr_group.name = name;
-
- /* Create all attributes associated with Signal */
- err = counter_signal_attributes_create(groups_list + i, counter,
- signal);
- if (err)
- goto err_free_attr_groups;
- }
-
- return 0;
-
-err_free_attr_groups:
- do {
- kfree(groups_list[i].attr_group.name);
- counter_device_attr_list_free(&groups_list[i].attr_list);
- } while (i--);
- return err;
-}
-
-static const char *const counter_synapse_action_str[] = {
- [COUNTER_SYNAPSE_ACTION_NONE] = "none",
- [COUNTER_SYNAPSE_ACTION_RISING_EDGE] = "rising edge",
- [COUNTER_SYNAPSE_ACTION_FALLING_EDGE] = "falling edge",
- [COUNTER_SYNAPSE_ACTION_BOTH_EDGES] = "both edges"
-};
-
-struct counter_action_unit {
- struct counter_synapse *synapse;
- struct counter_count *count;
-};
-
-static ssize_t counter_action_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- int err;
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_action_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- struct counter_synapse *const synapse = component->synapse;
- size_t action_index;
- enum counter_synapse_action action;
-
- err = counter->ops->action_get(counter, count, synapse, &action_index);
- if (err)
- return err;
-
- synapse->action = action_index;
-
- action = synapse->actions_list[action_index];
- return sprintf(buf, "%s\n", counter_synapse_action_str[action]);
-}
-
-static ssize_t counter_action_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_action_unit *const component = devattr->component;
- struct counter_synapse *const synapse = component->synapse;
- size_t action_index;
- const size_t num_actions = synapse->num_actions;
- enum counter_synapse_action action;
- int err;
- struct counter_device *const counter = dev_get_drvdata(dev);
- struct counter_count *const count = component->count;
-
- /* Find requested action mode */
- for (action_index = 0; action_index < num_actions; action_index++) {
- action = synapse->actions_list[action_index];
- if (sysfs_streq(buf, counter_synapse_action_str[action]))
- break;
- }
- /* If requested action mode not found */
- if (action_index >= num_actions)
- return -EINVAL;
-
- err = counter->ops->action_set(counter, count, synapse, action_index);
- if (err)
- return err;
-
- synapse->action = action_index;
-
- return len;
-}
-
-struct counter_action_avail_unit {
- const enum counter_synapse_action *actions_list;
- size_t num_actions;
-};
-
-static ssize_t counter_synapse_action_available_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_action_avail_unit *const component = devattr->component;
- size_t i;
- enum counter_synapse_action action;
- ssize_t len = 0;
-
- for (i = 0; i < component->num_actions; i++) {
- action = component->actions_list[i];
- len += sprintf(buf + len, "%s\n",
- counter_synapse_action_str[action]);
- }
-
- return len;
-}
-
-static int counter_synapses_register(
- struct counter_device_attr_group *const group,
- const struct counter_device *const counter,
- struct counter_count *const count, const char *const count_attr_name)
-{
- size_t i;
- struct counter_synapse *synapse;
- const char *prefix;
- struct counter_action_unit *action_comp;
- struct counter_attr_parm parm;
- int err;
- struct counter_action_avail_unit *avail_comp;
-
- /* Register each Synapse */
- for (i = 0; i < count->num_synapses; i++) {
- synapse = count->synapses + i;
-
- /* Generate attribute prefix */
- prefix = kasprintf(GFP_KERNEL, "signal%d_",
- synapse->signal->id);
- if (!prefix) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
-
- /* Allocate action attribute component */
- action_comp = kmalloc(sizeof(*action_comp), GFP_KERNEL);
- if (!action_comp) {
- err = -ENOMEM;
- goto err_free_prefix;
- }
- action_comp->synapse = synapse;
- action_comp->count = count;
-
- /* Create action attribute */
- parm.group = group;
- parm.prefix = prefix;
- parm.name = "action";
- parm.show = (counter->ops->action_get) ? counter_action_show : NULL;
- parm.store = (counter->ops->action_set) ? counter_action_store : NULL;
- parm.component = action_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(action_comp);
- goto err_free_prefix;
- }
-
- /* Allocate action available attribute component */
- avail_comp = kmalloc(sizeof(*avail_comp), GFP_KERNEL);
- if (!avail_comp) {
- err = -ENOMEM;
- goto err_free_prefix;
- }
- avail_comp->actions_list = synapse->actions_list;
- avail_comp->num_actions = synapse->num_actions;
-
- /* Create action_available attribute */
- parm.group = group;
- parm.prefix = prefix;
- parm.name = "action_available";
- parm.show = counter_synapse_action_available_show;
- parm.store = NULL;
- parm.component = avail_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(avail_comp);
- goto err_free_prefix;
- }
-
- kfree(prefix);
- }
-
- return 0;
-
-err_free_prefix:
- kfree(prefix);
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-struct counter_count_unit {
- struct counter_count *count;
-};
-
-static ssize_t counter_count_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- int err;
- unsigned long val;
-
- err = counter->ops->count_read(counter, count, &val);
- if (err)
- return err;
-
- return sprintf(buf, "%lu\n", val);
-}
-
-static ssize_t counter_count_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- int err;
- unsigned long val;
-
- err = kstrtoul(buf, 0, &val);
- if (err)
- return err;
-
- err = counter->ops->count_write(counter, count, val);
- if (err)
- return err;
-
- return len;
-}
-
-static const char *const counter_count_function_str[] = {
- [COUNTER_COUNT_FUNCTION_INCREASE] = "increase",
- [COUNTER_COUNT_FUNCTION_DECREASE] = "decrease",
- [COUNTER_COUNT_FUNCTION_PULSE_DIRECTION] = "pulse-direction",
- [COUNTER_COUNT_FUNCTION_QUADRATURE_X1_A] = "quadrature x1 a",
- [COUNTER_COUNT_FUNCTION_QUADRATURE_X1_B] = "quadrature x1 b",
- [COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A] = "quadrature x2 a",
- [COUNTER_COUNT_FUNCTION_QUADRATURE_X2_B] = "quadrature x2 b",
- [COUNTER_COUNT_FUNCTION_QUADRATURE_X4] = "quadrature x4"
-};
-
-static ssize_t counter_function_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int err;
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- size_t func_index;
- enum counter_count_function function;
-
- err = counter->ops->function_get(counter, count, &func_index);
- if (err)
- return err;
-
- count->function = func_index;
-
- function = count->functions_list[func_index];
- return sprintf(buf, "%s\n", counter_count_function_str[function]);
-}
-
-static ssize_t counter_function_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- const size_t num_functions = count->num_functions;
- size_t func_index;
- enum counter_count_function function;
- int err;
- struct counter_device *const counter = dev_get_drvdata(dev);
-
- /* Find requested Count function mode */
- for (func_index = 0; func_index < num_functions; func_index++) {
- function = count->functions_list[func_index];
- if (sysfs_streq(buf, counter_count_function_str[function]))
- break;
- }
- /* Return error if requested Count function mode not found */
- if (func_index >= num_functions)
- return -EINVAL;
-
- err = counter->ops->function_set(counter, count, func_index);
- if (err)
- return err;
-
- count->function = func_index;
-
- return len;
-}
-
-struct counter_count_ext_unit {
- struct counter_count *count;
- const struct counter_count_ext *ext;
-};
-
-static ssize_t counter_count_ext_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_ext_unit *const comp = devattr->component;
- const struct counter_count_ext *const ext = comp->ext;
-
- return ext->read(dev_get_drvdata(dev), comp->count, ext->priv, buf);
-}
-
-static ssize_t counter_count_ext_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_ext_unit *const comp = devattr->component;
- const struct counter_count_ext *const ext = comp->ext;
-
- return ext->write(dev_get_drvdata(dev), comp->count, ext->priv, buf,
- len);
-}
-
-static int counter_count_ext_register(
- struct counter_device_attr_group *const group,
- struct counter_count *const count)
-{
- size_t i;
- const struct counter_count_ext *ext;
- struct counter_count_ext_unit *count_ext_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Create an attribute for each extension */
- for (i = 0 ; i < count->num_ext; i++) {
- ext = count->ext + i;
-
- /* Allocate count_ext attribute component */
- count_ext_comp = kmalloc(sizeof(*count_ext_comp), GFP_KERNEL);
- if (!count_ext_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
- count_ext_comp->count = count;
- count_ext_comp->ext = ext;
-
- /* Allocate count_ext attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = ext->name;
- parm.show = (ext->read) ? counter_count_ext_show : NULL;
- parm.store = (ext->write) ? counter_count_ext_store : NULL;
- parm.component = count_ext_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(count_ext_comp);
- goto err_free_attr_list;
- }
- }
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-struct counter_func_avail_unit {
- const enum counter_count_function *functions_list;
- size_t num_functions;
-};
-
-static ssize_t counter_count_function_available_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_func_avail_unit *const component = devattr->component;
- const enum counter_count_function *const func_list = component->functions_list;
- const size_t num_functions = component->num_functions;
- size_t i;
- enum counter_count_function function;
- ssize_t len = 0;
-
- for (i = 0; i < num_functions; i++) {
- function = func_list[i];
- len += sprintf(buf + len, "%s\n",
- counter_count_function_str[function]);
- }
-
- return len;
-}
-
-static int counter_count_attributes_create(
- struct counter_device_attr_group *const group,
- const struct counter_device *const counter,
- struct counter_count *const count)
-{
- struct counter_count_unit *count_comp;
- struct counter_attr_parm parm;
- int err;
- struct counter_count_unit *func_comp;
- struct counter_func_avail_unit *avail_comp;
-
- /* Allocate count attribute component */
- count_comp = kmalloc(sizeof(*count_comp), GFP_KERNEL);
- if (!count_comp)
- return -ENOMEM;
- count_comp->count = count;
-
- /* Create main Count attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "count";
- parm.show = (counter->ops->count_read) ? counter_count_show : NULL;
- parm.store = (counter->ops->count_write) ? counter_count_store : NULL;
- parm.component = count_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(count_comp);
- return err;
- }
-
- /* Allocate function attribute component */
- func_comp = kmalloc(sizeof(*func_comp), GFP_KERNEL);
- if (!func_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
- func_comp->count = count;
-
- /* Create Count function attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "function";
- parm.show = (counter->ops->function_get) ? counter_function_show : NULL;
- parm.store = (counter->ops->function_set) ? counter_function_store : NULL;
- parm.component = func_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(func_comp);
- goto err_free_attr_list;
- }
-
- /* Allocate function available attribute component */
- avail_comp = kmalloc(sizeof(*avail_comp), GFP_KERNEL);
- if (!avail_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
- avail_comp->functions_list = count->functions_list;
- avail_comp->num_functions = count->num_functions;
-
- /* Create Count function_available attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "function_available";
- parm.show = counter_count_function_available_show;
- parm.store = NULL;
- parm.component = avail_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(avail_comp);
- goto err_free_attr_list;
- }
-
- /* Create Count name attribute */
- err = counter_name_attribute_create(group, count->name);
- if (err)
- goto err_free_attr_list;
-
- /* Register Count extension attributes */
- err = counter_count_ext_register(group, count);
- if (err)
- goto err_free_attr_list;
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static int counter_counts_register(
- struct counter_device_attr_group *const groups_list,
- const struct counter_device *const counter)
-{
- size_t i;
- struct counter_count *count;
- const char *name;
- int err;
-
- /* Register each Count */
- for (i = 0; i < counter->num_counts; i++) {
- count = counter->counts + i;
-
- /* Generate Count attribute directory name */
- name = kasprintf(GFP_KERNEL, "count%d", count->id);
- if (!name) {
- err = -ENOMEM;
- goto err_free_attr_groups;
- }
- groups_list[i].attr_group.name = name;
-
- /* Register the Synapses associated with each Count */
- err = counter_synapses_register(groups_list + i, counter, count,
- name);
- if (err)
- goto err_free_attr_groups;
-
- /* Create all attributes associated with Count */
- err = counter_count_attributes_create(groups_list + i, counter,
- count);
- if (err)
- goto err_free_attr_groups;
- }
-
- return 0;
-
-err_free_attr_groups:
- do {
- kfree(groups_list[i].attr_group.name);
- counter_device_attr_list_free(&groups_list[i].attr_list);
- } while (i--);
- return err;
-}
-
-struct counter_size_unit {
- size_t size;
-};
-
-static ssize_t counter_device_attr_size_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- const struct counter_size_unit *const comp = to_counter_attr(attr)->component;
-
- return sprintf(buf, "%zu\n", comp->size);
-}
-
-static int counter_size_attribute_create(
- struct counter_device_attr_group *const group,
- const size_t size, const char *const name)
-{
- struct counter_size_unit *size_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Allocate size attribute component */
- size_comp = kmalloc(sizeof(*size_comp), GFP_KERNEL);
- if (!size_comp)
- return -ENOMEM;
- size_comp->size = size;
-
- parm.group = group;
- parm.prefix = "";
- parm.name = name;
- parm.show = counter_device_attr_size_show;
- parm.store = NULL;
- parm.component = size_comp;
- err = counter_attribute_create(&parm);
- if (err)
- goto err_free_size_comp;
-
- return 0;
-
-err_free_size_comp:
- kfree(size_comp);
- return err;
-}
-
-struct counter_ext_unit {
- const struct counter_device_ext *ext;
-};
-
-static ssize_t counter_device_ext_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_ext_unit *const component = devattr->component;
- const struct counter_device_ext *const ext = component->ext;
-
- return ext->read(dev_get_drvdata(dev), ext->priv, buf);
-}
-
-static ssize_t counter_device_ext_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_ext_unit *const component = devattr->component;
- const struct counter_device_ext *const ext = component->ext;
-
- return ext->write(dev_get_drvdata(dev), ext->priv, buf, len);
-}
-
-static int counter_device_ext_register(
- struct counter_device_attr_group *const group,
- struct counter_device *const counter)
-{
- size_t i;
- struct counter_ext_unit *ext_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Create an attribute for each extension */
- for (i = 0 ; i < counter->num_ext; i++) {
- /* Allocate extension attribute component */
- ext_comp = kmalloc(sizeof(*ext_comp), GFP_KERNEL);
- if (!ext_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
-
- ext_comp->ext = counter->ext + i;
-
- /* Allocate extension attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = counter->ext[i].name;
- parm.show = (counter->ext[i].read) ? counter_device_ext_show : NULL;
- parm.store = (counter->ext[i].write) ? counter_device_ext_store : NULL;
- parm.component = ext_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(ext_comp);
- goto err_free_attr_list;
- }
- }
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static int counter_global_attr_register(
- struct counter_device_attr_group *const group,
- struct counter_device *const counter)
-{
- int err;
-
- /* Create name attribute */
- err = counter_name_attribute_create(group, counter->name);
- if (err)
- return err;
-
- /* Create num_counts attribute */
- err = counter_size_attribute_create(group, counter->num_counts,
- "num_counts");
- if (err)
- goto err_free_attr_list;
-
- /* Create num_signals attribute */
- err = counter_size_attribute_create(group, counter->num_signals,
- "num_signals");
- if (err)
- goto err_free_attr_list;
-
- /* Register Counter device extension attributes */
- err = counter_device_ext_register(group, counter);
- if (err)
- goto err_free_attr_list;
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static void counter_device_groups_list_free(
- struct counter_device_attr_group *const groups_list,
- const size_t num_groups)
-{
- struct counter_device_attr_group *group;
- size_t i;
-
- /* loop through all attribute groups (signals, counts, global, etc.) */
- for (i = 0; i < num_groups; i++) {
- group = groups_list + i;
-
- /* free all attribute group and associated attributes memory */
- kfree(group->attr_group.name);
- kfree(group->attr_group.attrs);
- counter_device_attr_list_free(&group->attr_list);
- }
-
- kfree(groups_list);
-}
-
-static int counter_device_groups_list_prepare(
- struct counter_device *const counter)
-{
- const size_t total_num_groups =
- counter->num_signals + counter->num_counts + 1;
- struct counter_device_attr_group *groups_list;
- size_t i;
- int err;
- size_t num_groups = 0;
-
- /* Allocate space for attribute groups (signals, counts, and ext) */
- groups_list = kcalloc(total_num_groups, sizeof(*groups_list),
- GFP_KERNEL);
- if (!groups_list)
- return -ENOMEM;
-
- /* Initialize attribute lists */
- for (i = 0; i < total_num_groups; i++)
- INIT_LIST_HEAD(&groups_list[i].attr_list);
-
- /* Register Signals */
- err = counter_signals_register(groups_list, counter);
- if (err)
- goto err_free_groups_list;
- num_groups += counter->num_signals;
-
- /* Register Counts and respective Synapses */
- err = counter_counts_register(groups_list + num_groups, counter);
- if (err)
- goto err_free_groups_list;
- num_groups += counter->num_counts;
-
- /* Register Counter global attributes */
- err = counter_global_attr_register(groups_list + num_groups, counter);
- if (err)
- goto err_free_groups_list;
- num_groups++;
-
- /* Store groups_list in device_state */
- counter->device_state->groups_list = groups_list;
- counter->device_state->num_groups = num_groups;
-
- return 0;
-
-err_free_groups_list:
- counter_device_groups_list_free(groups_list, num_groups);
- return err;
-}
-
-static int counter_device_groups_prepare(
- struct counter_device_state *const device_state)
-{
- size_t i, j;
- struct counter_device_attr_group *group;
- int err;
- struct counter_device_attr *p;
-
- /* Allocate attribute groups for association with device */
- device_state->groups = kcalloc(device_state->num_groups + 1,
- sizeof(*device_state->groups),
- GFP_KERNEL);
- if (!device_state->groups)
- return -ENOMEM;
-
- /* Prepare each group of attributes for association */
- for (i = 0; i < device_state->num_groups; i++) {
- group = device_state->groups_list + i;
-
- /* Allocate space for attribute pointers in attribute group */
- group->attr_group.attrs = kcalloc(group->num_attr + 1,
- sizeof(*group->attr_group.attrs), GFP_KERNEL);
- if (!group->attr_group.attrs) {
- err = -ENOMEM;
- goto err_free_groups;
- }
-
- /* Add attribute pointers to attribute group */
- j = 0;
- list_for_each_entry(p, &group->attr_list, l)
- group->attr_group.attrs[j++] = &p->dev_attr.attr;
-
- /* Group attributes in attribute group */
- device_state->groups[i] = &group->attr_group;
- }
- /* Associate attributes with device */
- device_state->dev.groups = device_state->groups;
-
- return 0;
-
-err_free_groups:
- do {
- group = device_state->groups_list + i;
- kfree(group->attr_group.attrs);
- group->attr_group.attrs = NULL;
- } while (i--);
- kfree(device_state->groups);
- return err;
-}
-
-/* Provides a unique ID for each counter device */
-static DEFINE_IDA(counter_ida);
-
-static void counter_device_release(struct device *dev)
-{
- struct counter_device *const counter = dev_get_drvdata(dev);
- struct counter_device_state *const device_state = counter->device_state;
-
- kfree(device_state->groups);
- counter_device_groups_list_free(device_state->groups_list,
- device_state->num_groups);
- ida_simple_remove(&counter_ida, device_state->id);
- kfree(device_state);
-}
-
-static struct device_type counter_device_type = {
- .name = "counter_device",
- .release = counter_device_release
-};
-
-static struct bus_type counter_bus_type = {
- .name = "counter"
-};
-
-/**
- * counter_register - register Counter to the system
- * @counter: pointer to Counter to register
- *
- * This function registers a Counter to the system. A sysfs "counter" directory
- * will be created and populated with sysfs attributes correlating with the
- * Counter Signals, Synapses, and Counts respectively.
- */
-int counter_register(struct counter_device *const counter)
-{
- struct counter_device_state *device_state;
- int err;
-
- /* Allocate internal state container for Counter device */
- device_state = kzalloc(sizeof(*device_state), GFP_KERNEL);
- if (!device_state)
- return -ENOMEM;
- counter->device_state = device_state;
-
- /* Acquire unique ID */
- device_state->id = ida_simple_get(&counter_ida, 0, 0, GFP_KERNEL);
- if (device_state->id < 0) {
- err = device_state->id;
- goto err_free_device_state;
- }
-
- /* Configure device structure for Counter */
- device_state->dev.type = &counter_device_type;
- device_state->dev.bus = &counter_bus_type;
- if (counter->parent) {
- device_state->dev.parent = counter->parent;
- device_state->dev.of_node = counter->parent->of_node;
- }
- dev_set_name(&device_state->dev, "counter%d", device_state->id);
- device_initialize(&device_state->dev);
- dev_set_drvdata(&device_state->dev, counter);
-
- /* Prepare device attributes */
- err = counter_device_groups_list_prepare(counter);
- if (err)
- goto err_free_id;
-
- /* Organize device attributes to groups and match to device */
- err = counter_device_groups_prepare(device_state);
- if (err)
- goto err_free_groups_list;
-
- /* Add device to system */
- err = device_add(&device_state->dev);
- if (err)
- goto err_free_groups;
-
- return 0;
-
-err_free_groups:
- kfree(device_state->groups);
-err_free_groups_list:
- counter_device_groups_list_free(device_state->groups_list,
- device_state->num_groups);
-err_free_id:
- ida_simple_remove(&counter_ida, device_state->id);
-err_free_device_state:
- kfree(device_state);
- return err;
-}
-EXPORT_SYMBOL_GPL(counter_register);
-
-/**
- * counter_unregister - unregister Counter from the system
- * @counter: pointer to Counter to unregister
- *
- * The Counter is unregistered from the system; all allocated memory is freed.
- */
-void counter_unregister(struct counter_device *const counter)
-{
- if (counter)
- device_del(&counter->device_state->dev);
-}
-EXPORT_SYMBOL_GPL(counter_unregister);
-
-static void devm_counter_unreg(struct device *dev, void *res)
-{
- counter_unregister(*(struct counter_device **)res);
-}
-
-/**
- * devm_counter_register - Resource-managed counter_register
- * @dev: device to allocate counter_device for
- * @counter: pointer to Counter to register
- *
- * Managed counter_register. The Counter registered with this function is
- * automatically unregistered on driver detach. This function calls
- * counter_register internally. Refer to that function for more information.
- *
- * If an Counter registered with this function needs to be unregistered
- * separately, devm_counter_unregister must be used.
- *
- * RETURNS:
- * 0 on success, negative error number on failure.
- */
-int devm_counter_register(struct device *dev,
- struct counter_device *const counter)
-{
- struct counter_device **ptr;
- int ret;
-
- ptr = devres_alloc(devm_counter_unreg, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return -ENOMEM;
-
- ret = counter_register(counter);
- if (!ret) {
- *ptr = counter;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(devm_counter_register);
-
-static int devm_counter_match(struct device *dev, void *res, void *data)
-{
- struct counter_device **r = res;
-
- if (!r || !*r) {
- WARN_ON(!r || !*r);
- return 0;
- }
-
- return *r == data;
-}
-
-/**
- * devm_counter_unregister - Resource-managed counter_unregister
- * @dev: device this counter_device belongs to
- * @counter: pointer to Counter associated with the device
- *
- * Unregister Counter registered with devm_counter_register.
- */
-void devm_counter_unregister(struct device *dev,
- struct counter_device *const counter)
-{
- int rc;
-
- rc = devres_release(dev, devm_counter_unreg, devm_counter_match,
- counter);
- WARN_ON(rc);
-}
-EXPORT_SYMBOL_GPL(devm_counter_unregister);
-
-static int __init counter_init(void)
-{
- return bus_register(&counter_bus_type);
-}
-
-static void __exit counter_exit(void)
-{
- bus_unregister(&counter_bus_type);
-}
-
-subsys_initcall(counter_init);
-module_exit(counter_exit);
-
-MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@xxxxxxxxx>");
-MODULE_DESCRIPTION("Generic Counter interface");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/counter/ftm-quaddec.c b/drivers/counter/ftm-quaddec.c
index c2b3fdfd8b77..450353f495a2 100644
--- a/drivers/counter/ftm-quaddec.c
+++ b/drivers/counter/ftm-quaddec.c
@@ -151,29 +151,19 @@ static const char * const ftm_quaddec_prescaler[] = {
"1", "2", "4", "8", "16", "32", "64", "128"
};

-static struct counter_count_enum_ext ftm_quaddec_prescaler_enum = {
- .items = ftm_quaddec_prescaler,
- .num_items = ARRAY_SIZE(ftm_quaddec_prescaler),
- .get = ftm_quaddec_get_prescaler,
- .set = ftm_quaddec_set_prescaler
-};
-
-enum ftm_quaddec_synapse_action {
- FTM_QUADDEC_SYNAPSE_ACTION_BOTH_EDGES,
-};
+static DEFINE_COUNTER_ENUM(ftm_quaddec_prescaler_enum, ftm_quaddec_prescaler);

-static enum counter_synapse_action ftm_quaddec_synapse_actions[] = {
- [FTM_QUADDEC_SYNAPSE_ACTION_BOTH_EDGES] =
+static const enum counter_synapse_action ftm_quaddec_synapse_actions[] = {
COUNTER_SYNAPSE_ACTION_BOTH_EDGES
};

enum ftm_quaddec_count_function {
- FTM_QUADDEC_COUNT_ENCODER_MODE_1,
+ FTM_QUADDEC_COUNT_ENCODER_MODE_1 =
+ COUNTER_COUNT_FUNCTION_QUADRATURE_X4
};

static const enum counter_count_function ftm_quaddec_count_functions[] = {
- [FTM_QUADDEC_COUNT_ENCODER_MODE_1] =
- COUNTER_COUNT_FUNCTION_QUADRATURE_X4
+ FTM_QUADDEC_COUNT_ENCODER_MODE_1
};

static int ftm_quaddec_count_read(struct counter_device *counter,
@@ -208,7 +198,7 @@ static int ftm_quaddec_count_write(struct counter_device *counter,

static int ftm_quaddec_count_function_get(struct counter_device *counter,
struct counter_count *count,
- size_t *function)
+ enum counter_count_function *function)
{
*function = FTM_QUADDEC_COUNT_ENCODER_MODE_1;

@@ -218,20 +208,13 @@ static int ftm_quaddec_count_function_get(struct counter_device *counter,
static int ftm_quaddec_action_get(struct counter_device *counter,
struct counter_count *count,
struct counter_synapse *synapse,
- size_t *action)
+ enum counter_synapse_action *action)
{
- *action = FTM_QUADDEC_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;

return 0;
}

-static const struct counter_ops ftm_quaddec_cnt_ops = {
- .count_read = ftm_quaddec_count_read,
- .count_write = ftm_quaddec_count_write,
- .function_get = ftm_quaddec_count_function_get,
- .action_get = ftm_quaddec_action_get,
-};
-
static struct counter_signal ftm_quaddec_signals[] = {
{
.id = 0,
@@ -256,9 +239,11 @@ static struct counter_synapse ftm_quaddec_count_synapses[] = {
}
};

-static const struct counter_count_ext ftm_quaddec_count_ext[] = {
- COUNTER_COUNT_ENUM("prescaler", &ftm_quaddec_prescaler_enum),
- COUNTER_COUNT_ENUM_AVAILABLE("prescaler", &ftm_quaddec_prescaler_enum),
+static struct counter_data ftm_quaddec_count_ext[] = {
+ COUNTER_DATA_ENUM_AND_AVAILABLE("prescaler",
+ ftm_quaddec_get_prescaler,
+ ftm_quaddec_set_prescaler,
+ ftm_quaddec_prescaler_enum),
};

static struct counter_count ftm_quaddec_counts = {
@@ -302,7 +287,10 @@ static int ftm_quaddec_probe(struct platform_device *pdev)
}
ftm->counter.name = dev_name(&pdev->dev);
ftm->counter.parent = &pdev->dev;
- ftm->counter.ops = &ftm_quaddec_cnt_ops;
+ ftm->counter.count_read = ftm_quaddec_count_read;
+ ftm->counter.count_write = ftm_quaddec_count_write;
+ ftm->counter.function_read = ftm_quaddec_count_function_get;
+ ftm->counter.action_read = ftm_quaddec_action_get;
ftm->counter.counts = &ftm_quaddec_counts;
ftm->counter.num_counts = 1;
ftm->counter.signals = ftm_quaddec_signals;
diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c
index 8e276eb655f5..53ca88533831 100644
--- a/drivers/counter/stm32-lptimer-cnt.c
+++ b/drivers/counter/stm32-lptimer-cnt.c
@@ -352,30 +352,44 @@ static const struct iio_chan_spec stm32_lptim_cnt_channels = {
* @STM32_LPTIM_ENCODER_BOTH_EDGE: count on both edges (IN1 & IN2 quadrature)
*/
enum stm32_lptim_cnt_function {
- STM32_LPTIM_COUNTER_INCREASE,
- STM32_LPTIM_ENCODER_BOTH_EDGE,
+ STM32_LPTIM_COUNTER_INCREASE = COUNTER_COUNT_FUNCTION_INCREASE,
+ STM32_LPTIM_ENCODER_BOTH_EDGE = COUNTER_COUNT_FUNCTION_QUADRATURE_X4,
};

static enum counter_count_function stm32_lptim_cnt_functions[] = {
- [STM32_LPTIM_COUNTER_INCREASE] = COUNTER_COUNT_FUNCTION_INCREASE,
- [STM32_LPTIM_ENCODER_BOTH_EDGE] = COUNTER_COUNT_FUNCTION_QUADRATURE_X4,
+ STM32_LPTIM_COUNTER_INCREASE,
+ STM32_LPTIM_ENCODER_BOTH_EDGE,
};

enum stm32_lptim_synapse_action {
+ /* Index must match with stm32_lptim_cnt_polarity[] (priv->polarity) */
STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE,
STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE,
STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES,
STM32_LPTIM_SYNAPSE_ACTION_NONE,
};

-static enum counter_synapse_action stm32_lptim_cnt_synapse_actions[] = {
- /* Index must match with stm32_lptim_cnt_polarity[] (priv->polarity) */
+static const enum stm32_lptim_synapse_action stm32_lptim_c2l_actions_map[] = {
+ [COUNTER_SYNAPSE_ACTION_RISING_EDGE] = STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE,
+ [COUNTER_SYNAPSE_ACTION_FALLING_EDGE] = STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE,
+ [COUNTER_SYNAPSE_ACTION_BOTH_EDGES] = STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES,
+ [COUNTER_SYNAPSE_ACTION_NONE] = STM32_LPTIM_SYNAPSE_ACTION_NONE,
+};
+
+static const enum counter_synapse_action stm32_lptim_l2c_actions_map[] = {
[STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE,
[STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
[STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
[STM32_LPTIM_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
};

+static const enum counter_synapse_action stm32_lptim_cnt_synapse_actions[] = {
+ stm32_lptim_l2c_actions_map[STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE],
+ stm32_lptim_l2c_actions_map[STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE],
+ stm32_lptim_l2c_actions_map[STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES],
+ stm32_lptim_l2c_actions_map[STM32_LPTIM_SYNAPSE_ACTION_NONE],
+};
+
static int stm32_lptim_cnt_read(struct counter_device *counter,
struct counter_count *count, unsigned long *val)
{
@@ -394,7 +408,7 @@ static int stm32_lptim_cnt_read(struct counter_device *counter,

static int stm32_lptim_cnt_function_get(struct counter_device *counter,
struct counter_count *count,
- size_t *function)
+ enum counter_count_function *function)
{
struct stm32_lptim_cnt *const priv = counter->priv;

@@ -413,7 +427,7 @@ static int stm32_lptim_cnt_function_get(struct counter_device *counter,

static int stm32_lptim_cnt_function_set(struct counter_device *counter,
struct counter_count *count,
- size_t function)
+ enum counter_count_function function)
{
struct stm32_lptim_cnt *const priv = counter->priv;

@@ -423,19 +437,20 @@ static int stm32_lptim_cnt_function_set(struct counter_device *counter,
switch (function) {
case STM32_LPTIM_COUNTER_INCREASE:
priv->quadrature_mode = 0;
- return 0;
+ break;
case STM32_LPTIM_ENCODER_BOTH_EDGE:
priv->quadrature_mode = 1;
priv->polarity = STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES;
- return 0;
+ break;
+ default: return -EINVAL;
}

- return -EINVAL;
+ return 0;
}

-static ssize_t stm32_lptim_cnt_enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int stm32_lptim_cnt_enable_read(struct counter_device *counter,
+ struct counter_count *count,
+ bool *enable)
{
struct stm32_lptim_cnt *const priv = counter->priv;
int ret;
@@ -444,22 +459,18 @@ static ssize_t stm32_lptim_cnt_enable_read(struct counter_device *counter,
if (ret < 0)
return ret;

- return scnprintf(buf, PAGE_SIZE, "%u\n", ret);
+ *enable = ret;
+
+ return 0;
}

-static ssize_t stm32_lptim_cnt_enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *private,
- const char *buf, size_t len)
+static int stm32_lptim_cnt_enable_write(struct counter_device *counter,
+ struct counter_count *count,
+ bool enable)
{
struct stm32_lptim_cnt *const priv = counter->priv;
- bool enable;
int ret;

- ret = kstrtobool(buf, &enable);
- if (ret)
- return ret;
-
/* Check nobody uses the timer, or already disabled/enabled */
ret = stm32_lptim_is_enabled(priv);
if ((ret < 0) || (!ret && !enable))
@@ -475,48 +486,51 @@ static ssize_t stm32_lptim_cnt_enable_write(struct counter_device *counter,
if (ret)
return ret;

- return len;
+ return 0;
}

-static ssize_t stm32_lptim_cnt_ceiling_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int stm32_lptim_cnt_ceiling_read(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long *ceiling)
{
struct stm32_lptim_cnt *const priv = counter->priv;

- return stm32_lptim_cnt_get_ceiling(priv, buf);
+ *ceiling = priv->ceiling;
+
+ return 0;
}

-static ssize_t stm32_lptim_cnt_ceiling_write(struct counter_device *counter,
- struct counter_count *count,
- void *private,
- const char *buf, size_t len)
+static int stm32_lptim_cnt_ceiling_write(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long ceiling)
{
struct stm32_lptim_cnt *const priv = counter->priv;

- return stm32_lptim_cnt_set_ceiling(priv, buf, len);
+ if (stm32_lptim_is_enabled(priv))
+ return -EBUSY;
+
+ priv->ceiling = ceiling;
+
+ if (ceiling > STM32_LPTIM_MAX_ARR)
+ return -EINVAL;
+
+ return 0;
}

-static const struct counter_count_ext stm32_lptim_cnt_ext[] = {
- {
- .name = "enable",
- .read = stm32_lptim_cnt_enable_read,
- .write = stm32_lptim_cnt_enable_write
- },
- {
- .name = "ceiling",
- .read = stm32_lptim_cnt_ceiling_read,
- .write = stm32_lptim_cnt_ceiling_write
- },
+static struct counter_data stm32_lptim_cnt_ext[] = {
+ COUNTER_DATA_ENABLE(stm32_lptim_cnt_enable_read,
+ stm32_lptim_cnt_enable_write),
+ COUNTER_DATA_CEILING(stm32_lptim_cnt_ceiling_read,
+ stm32_lptim_cnt_ceiling_write),
};

static int stm32_lptim_cnt_action_get(struct counter_device *counter,
struct counter_count *count,
struct counter_synapse *synapse,
- size_t *action)
+ enum counter_synapse_action *action)
{
struct stm32_lptim_cnt *const priv = counter->priv;
- size_t function;
+ enum counter_count_function function;
int err;

err = stm32_lptim_cnt_function_get(counter, count, &function);
@@ -527,25 +541,27 @@ static int stm32_lptim_cnt_action_get(struct counter_device *counter,
case STM32_LPTIM_COUNTER_INCREASE:
/* LP Timer acts as up-counter on input 1 */
if (synapse->signal->id == count->synapses[0].signal->id)
- *action = priv->polarity;
+ *action = stm32_lptim_l2c_actions_map[priv->polarity];
else
- *action = STM32_LPTIM_SYNAPSE_ACTION_NONE;
- return 0;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
+ break;
case STM32_LPTIM_ENCODER_BOTH_EDGE:
- *action = priv->polarity;
- return 0;
+ *action = stm32_lptim_l2c_actions_map[priv->polarity];
+ break;
+ default: return -EINVAL;
}

- return -EINVAL;
+ return 0;
}

static int stm32_lptim_cnt_action_set(struct counter_device *counter,
struct counter_count *count,
struct counter_synapse *synapse,
- size_t action)
+ enum counter_synapse_action action)
{
struct stm32_lptim_cnt *const priv = counter->priv;
- size_t function;
+ enum counter_count_function function;
+ enum stm32_lptim_cnt_function cnt_function;
int err;

if (stm32_lptim_is_enabled(priv))
@@ -554,29 +570,18 @@ static int stm32_lptim_cnt_action_set(struct counter_device *counter,
err = stm32_lptim_cnt_function_get(counter, count, &function);
if (err)
return err;
+ cnt_function = function;

/* only set polarity when in counter mode (on input 1) */
- if (function == STM32_LPTIM_COUNTER_INCREASE
- && synapse->signal->id == count->synapses[0].signal->id) {
- switch (action) {
- case STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE:
- case STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE:
- case STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES:
- priv->polarity = action;
- return 0;
- }
- }
+ if (cnt_function != STM32_LPTIM_COUNTER_INCREASE
+ || synapse->signal->id != count->synapses[0].signal->id
+ || action == COUNTER_SYNAPSE_ACTION_NONE)
+ return -EINVAL;

- return -EINVAL;
-}
+ priv->polarity = stm32_lptim_c2l_actions_map[action];

-static const struct counter_ops stm32_lptim_cnt_ops = {
- .count_read = stm32_lptim_cnt_read,
- .function_get = stm32_lptim_cnt_function_get,
- .function_set = stm32_lptim_cnt_function_set,
- .action_get = stm32_lptim_cnt_action_get,
- .action_set = stm32_lptim_cnt_action_set,
-};
+ return 0;
+}

static struct counter_signal stm32_lptim_cnt_signals[] = {
{
@@ -660,7 +665,11 @@ static int stm32_lptim_cnt_probe(struct platform_device *pdev)
/* Initialize Counter device */
priv->counter.name = dev_name(&pdev->dev);
priv->counter.parent = &pdev->dev;
- priv->counter.ops = &stm32_lptim_cnt_ops;
+ priv->counter.count_read = stm32_lptim_cnt_read;
+ priv->counter.function_read = stm32_lptim_cnt_function_get;
+ priv->counter.function_write = stm32_lptim_cnt_function_set;
+ priv->counter.action_read = stm32_lptim_cnt_action_get;
+ priv->counter.action_write = stm32_lptim_cnt_action_set;
if (ddata->has_encoder) {
priv->counter.counts = &stm32_lptim_enc_counts;
priv->counter.num_signals = ARRAY_SIZE(stm32_lptim_cnt_signals);
diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c
index ef2a974a2f10..09e87cf79ce9 100644
--- a/drivers/counter/stm32-timer-cnt.c
+++ b/drivers/counter/stm32-timer-cnt.c
@@ -45,17 +45,17 @@ struct stm32_timer_cnt {
*/
enum stm32_count_function {
STM32_COUNT_SLAVE_MODE_DISABLED = -1,
+ STM32_COUNT_ENCODER_MODE_1 = COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A,
+ STM32_COUNT_ENCODER_MODE_2 = COUNTER_COUNT_FUNCTION_QUADRATURE_X2_B,
+ STM32_COUNT_ENCODER_MODE_3 = COUNTER_COUNT_FUNCTION_QUADRATURE_X4,
+};
+
+static const enum counter_count_function stm32_count_functions[] = {
STM32_COUNT_ENCODER_MODE_1,
STM32_COUNT_ENCODER_MODE_2,
STM32_COUNT_ENCODER_MODE_3,
};

-static enum counter_count_function stm32_count_functions[] = {
- [STM32_COUNT_ENCODER_MODE_1] = COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A,
- [STM32_COUNT_ENCODER_MODE_2] = COUNTER_COUNT_FUNCTION_QUADRATURE_X2_B,
- [STM32_COUNT_ENCODER_MODE_3] = COUNTER_COUNT_FUNCTION_QUADRATURE_X4,
-};
-
static int stm32_count_read(struct counter_device *counter,
struct counter_count *count, unsigned long *val)
{
@@ -82,7 +82,7 @@ static int stm32_count_write(struct counter_device *counter,

static int stm32_count_function_get(struct counter_device *counter,
struct counter_count *count,
- size_t *function)
+ enum counter_count_function *function)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 smcr;
@@ -106,7 +106,7 @@ static int stm32_count_function_get(struct counter_device *counter,

static int stm32_count_function_set(struct counter_device *counter,
struct counter_count *count,
- size_t function)
+ enum counter_count_function function)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 cr1, sms;
@@ -146,78 +146,66 @@ static int stm32_count_function_set(struct counter_device *counter,
return 0;
}

-static ssize_t stm32_count_direction_read(struct counter_device *counter,
+static int stm32_count_direction_read(struct counter_device *counter,
struct counter_count *count,
- void *private, char *buf)
+ enum counter_count_direction *direction)
{
struct stm32_timer_cnt *const priv = counter->priv;
- const char *direction;
u32 cr1;

regmap_read(priv->regmap, TIM_CR1, &cr1);
- direction = (cr1 & TIM_CR1_DIR) ? "backward" : "forward";
+ *direction = (cr1 & TIM_CR1_DIR) ? COUNTER_COUNT_DIRECTION_BACKWARD :
+ COUNTER_COUNT_DIRECTION_FORWARD;

- return scnprintf(buf, PAGE_SIZE, "%s\n", direction);
+ return 0;
}

-static ssize_t stm32_count_ceiling_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int stm32_count_ceiling_read(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long *ceiling)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 arr;

regmap_read(priv->regmap, TIM_ARR, &arr);

- return snprintf(buf, PAGE_SIZE, "%u\n", arr);
+ *ceiling = arr;
+
+ return 0;
}

-static ssize_t stm32_count_ceiling_write(struct counter_device *counter,
- struct counter_count *count,
- void *private,
- const char *buf, size_t len)
+static int stm32_count_ceiling_write(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long ceiling)
{
struct stm32_timer_cnt *const priv = counter->priv;
- unsigned int ceiling;
- int ret;
-
- ret = kstrtouint(buf, 0, &ceiling);
- if (ret)
- return ret;

/* TIMx_ARR register shouldn't be buffered (ARPE=0) */
regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0);
regmap_write(priv->regmap, TIM_ARR, ceiling);

priv->ceiling = ceiling;
- return len;
+ return 0;
}

-static ssize_t stm32_count_enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int stm32_count_enable_read(struct counter_device *counter,
+ struct counter_count *count, bool *enable)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 cr1;

regmap_read(priv->regmap, TIM_CR1, &cr1);

- return scnprintf(buf, PAGE_SIZE, "%d\n", (bool)(cr1 & TIM_CR1_CEN));
+ *enable = cr1 & TIM_CR1_CEN;
+
+ return 0;
}

-static ssize_t stm32_count_enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *private,
- const char *buf, size_t len)
+static int stm32_count_enable_write(struct counter_device *counter,
+ struct counter_count *count, bool enable)
{
struct stm32_timer_cnt *const priv = counter->priv;
- int err;
u32 cr1;
- bool enable;
-
- err = kstrtobool(buf, &enable);
- if (err)
- return err;

if (enable) {
regmap_read(priv->regmap, TIM_CR1, &cr1);
@@ -236,46 +224,31 @@ static ssize_t stm32_count_enable_write(struct counter_device *counter,
/* Keep enabled state to properly handle low power states */
priv->enabled = enable;

- return len;
+ return 0;
}

-static const struct counter_count_ext stm32_count_ext[] = {
- {
- .name = "direction",
- .read = stm32_count_direction_read,
- },
- {
- .name = "enable",
- .read = stm32_count_enable_read,
- .write = stm32_count_enable_write
- },
- {
- .name = "ceiling",
- .read = stm32_count_ceiling_read,
- .write = stm32_count_ceiling_write
- },
-};
-
-enum stm32_synapse_action {
- STM32_SYNAPSE_ACTION_NONE,
- STM32_SYNAPSE_ACTION_BOTH_EDGES
+static struct counter_data stm32_count_ext[] = {
+ COUNTER_DATA_DIRECTION(stm32_count_direction_read),
+ COUNTER_DATA_ENABLE(stm32_count_enable_read, stm32_count_enable_write),
+ COUNTER_DATA_CEILING(stm32_count_ceiling_read,
+ stm32_count_ceiling_write),
};

-static enum counter_synapse_action stm32_synapse_actions[] = {
- [STM32_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
- [STM32_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES
+static const enum counter_synapse_action stm32_synapse_actions[] = {
+ COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES
};

static int stm32_action_get(struct counter_device *counter,
struct counter_count *count,
struct counter_synapse *synapse,
- size_t *action)
+ enum counter_synapse_action *action)
{
- size_t function;
+ enum counter_count_function function;
int err;

/* Default action mode (e.g. STM32_COUNT_SLAVE_MODE_DISABLED) */
- *action = STM32_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;

err = stm32_count_function_get(counter, count, &function);
if (err)
@@ -285,30 +258,23 @@ static int stm32_action_get(struct counter_device *counter,
case STM32_COUNT_ENCODER_MODE_1:
/* counts up/down on TI1FP1 edge depending on TI2FP2 level */
if (synapse->signal->id == count->synapses[0].signal->id)
- *action = STM32_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
break;
case STM32_COUNT_ENCODER_MODE_2:
/* counts up/down on TI2FP2 edge depending on TI1FP1 level */
if (synapse->signal->id == count->synapses[1].signal->id)
- *action = STM32_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
break;
case STM32_COUNT_ENCODER_MODE_3:
/* counts up/down on both TI1FP1 and TI2FP2 edges */
- *action = STM32_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
break;
+ default: return -EINVAL;
}

return 0;
}

-static const struct counter_ops stm32_timer_cnt_ops = {
- .count_read = stm32_count_read,
- .count_write = stm32_count_write,
- .function_get = stm32_count_function_get,
- .function_set = stm32_count_function_set,
- .action_get = stm32_action_get,
-};
-
static struct counter_signal stm32_signals[] = {
{
.id = 0,
@@ -363,7 +329,11 @@ static int stm32_timer_cnt_probe(struct platform_device *pdev)

priv->counter.name = dev_name(dev);
priv->counter.parent = dev;
- priv->counter.ops = &stm32_timer_cnt_ops;
+ priv->counter.count_read = stm32_count_read;
+ priv->counter.count_write = stm32_count_write;
+ priv->counter.function_read = stm32_count_function_get;
+ priv->counter.function_write = stm32_count_function_set;
+ priv->counter.action_read = stm32_action_get;
priv->counter.counts = &stm32_counts;
priv->counter.num_counts = 1;
priv->counter.signals = stm32_signals;
diff --git a/drivers/counter/ti-eqep.c b/drivers/counter/ti-eqep.c
index 1ff07faef27f..b1fac22a0a4f 100644
--- a/drivers/counter/ti-eqep.c
+++ b/drivers/counter/ti-eqep.c
@@ -74,16 +74,10 @@ enum {

/* Position Counter Input Modes */
enum {
- TI_EQEP_COUNT_FUNC_QUAD_COUNT,
- TI_EQEP_COUNT_FUNC_DIR_COUNT,
- TI_EQEP_COUNT_FUNC_UP_COUNT,
- TI_EQEP_COUNT_FUNC_DOWN_COUNT,
-};
-
-enum {
- TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES,
- TI_EQEP_SYNAPSE_ACTION_RISING_EDGE,
- TI_EQEP_SYNAPSE_ACTION_NONE,
+ TI_EQEP_COUNT_FUNC_QUAD_COUNT = COUNTER_COUNT_FUNCTION_QUADRATURE_X4,
+ TI_EQEP_COUNT_FUNC_DIR_COUNT = COUNTER_COUNT_FUNCTION_PULSE_DIRECTION,
+ TI_EQEP_COUNT_FUNC_UP_COUNT = COUNTER_COUNT_FUNCTION_INCREASE,
+ TI_EQEP_COUNT_FUNC_DOWN_COUNT = COUNTER_COUNT_FUNCTION_DECREASE,
};

struct ti_eqep_cnt {
@@ -118,7 +112,8 @@ static int ti_eqep_count_write(struct counter_device *counter,
}

static int ti_eqep_function_get(struct counter_device *counter,
- struct counter_count *count, size_t *function)
+ struct counter_count *count,
+ enum counter_count_function *function)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 qdecctl;
@@ -130,7 +125,8 @@ static int ti_eqep_function_get(struct counter_device *counter,
}

static int ti_eqep_function_set(struct counter_device *counter,
- struct counter_count *count, size_t function)
+ struct counter_count *count,
+ enum counter_count_function function)
{
struct ti_eqep_cnt *priv = counter->priv;

@@ -140,10 +136,11 @@ static int ti_eqep_function_set(struct counter_device *counter,

static int ti_eqep_action_get(struct counter_device *counter,
struct counter_count *count,
- struct counter_synapse *synapse, size_t *action)
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
struct ti_eqep_cnt *priv = counter->priv;
- size_t function;
+ enum counter_count_function function;
u32 qdecctl;
int err;

@@ -156,7 +153,7 @@ static int ti_eqep_action_get(struct counter_device *counter,
/* In quadrature mode, the rising and falling edge of both
* QEPA and QEPB trigger QCLK.
*/
- *action = TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
break;
case TI_EQEP_COUNT_FUNC_DIR_COUNT:
/* In direction-count mode only rising edge of QEPA is counted
@@ -164,10 +161,10 @@ static int ti_eqep_action_get(struct counter_device *counter,
*/
switch (synapse->signal->id) {
case TI_EQEP_SIGNAL_QEPA:
- *action = TI_EQEP_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
break;
default:
- *action = TI_EQEP_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
break;
}
break;
@@ -183,134 +180,103 @@ static int ti_eqep_action_get(struct counter_device *counter,
return err;

if (qdecctl & QDECCTL_XCR)
- *action = TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
else
- *action = TI_EQEP_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
break;
default:
- *action = TI_EQEP_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
break;
}
break;
+ default: return -EINVAL;
}

return 0;
}

-static const struct counter_ops ti_eqep_counter_ops = {
- .count_read = ti_eqep_count_read,
- .count_write = ti_eqep_count_write,
- .function_get = ti_eqep_function_get,
- .function_set = ti_eqep_function_set,
- .action_get = ti_eqep_action_get,
-};
-
-static ssize_t ti_eqep_position_ceiling_read(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, char *buf)
+static int ti_eqep_position_ceiling_read(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long *ceiling)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 qposmax;

regmap_read(priv->regmap32, QPOSMAX, &qposmax);

- return sprintf(buf, "%u\n", qposmax);
+ *ceiling = qposmax;
+
+ return 0;
}

-static ssize_t ti_eqep_position_ceiling_write(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, const char *buf,
- size_t len)
+static int ti_eqep_position_ceiling_write(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long ceiling)
{
struct ti_eqep_cnt *priv = counter->priv;
- int err;
- u32 res;

- err = kstrtouint(buf, 0, &res);
- if (err < 0)
- return err;
+ regmap_write(priv->regmap32, QPOSMAX, ceiling);

- regmap_write(priv->regmap32, QPOSMAX, res);
-
- return len;
+ return 0;
}

-static ssize_t ti_eqep_position_floor_read(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, char *buf)
+static int ti_eqep_position_floor_read(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long *floor)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 qposinit;

regmap_read(priv->regmap32, QPOSINIT, &qposinit);

- return sprintf(buf, "%u\n", qposinit);
+ *floor = qposinit;
+
+ return 0;
}

-static ssize_t ti_eqep_position_floor_write(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, const char *buf,
- size_t len)
+static int ti_eqep_position_floor_write(struct counter_device *counter,
+ struct counter_count *count,
+ unsigned long floor)
{
struct ti_eqep_cnt *priv = counter->priv;
- int err;
- u32 res;

- err = kstrtouint(buf, 0, &res);
- if (err < 0)
- return err;
+ regmap_write(priv->regmap32, QPOSINIT, floor);

- regmap_write(priv->regmap32, QPOSINIT, res);
-
- return len;
+ return 0;
}

-static ssize_t ti_eqep_position_enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, char *buf)
+static int ti_eqep_position_enable_read(struct counter_device *counter,
+ struct counter_count *count,
+ bool *enable)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 qepctl;

regmap_read(priv->regmap16, QEPCTL, &qepctl);

- return sprintf(buf, "%u\n", !!(qepctl & QEPCTL_PHEN));
+ *enable = !!(qepctl & QEPCTL_PHEN);
+
+ return 0;
}

-static ssize_t ti_eqep_position_enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, const char *buf,
- size_t len)
+static int ti_eqep_position_enable_write(struct counter_device *counter,
+ struct counter_count *count,
+ bool enable)
{
struct ti_eqep_cnt *priv = counter->priv;
- int err;
- bool res;

- err = kstrtobool(buf, &res);
- if (err < 0)
- return err;
-
- regmap_write_bits(priv->regmap16, QEPCTL, QEPCTL_PHEN, res ? -1 : 0);
+ regmap_write_bits(priv->regmap16, QEPCTL, QEPCTL_PHEN, enable ? -1 : 0);

- return len;
+ return 0;
}

-static struct counter_count_ext ti_eqep_position_ext[] = {
- {
- .name = "ceiling",
- .read = ti_eqep_position_ceiling_read,
- .write = ti_eqep_position_ceiling_write,
- },
- {
- .name = "floor",
- .read = ti_eqep_position_floor_read,
- .write = ti_eqep_position_floor_write,
- },
- {
- .name = "enable",
- .read = ti_eqep_position_enable_read,
- .write = ti_eqep_position_enable_write,
- },
+static struct counter_data ti_eqep_position_ext[] = {
+ COUNTER_DATA_CEILING(ti_eqep_position_ceiling_read,
+ ti_eqep_position_ceiling_write),
+ COUNTER_DATA_FLOOR(ti_eqep_position_floor_read,
+ ti_eqep_position_floor_write),
+ COUNTER_DATA_ENABLE(ti_eqep_position_enable_read,
+ ti_eqep_position_enable_write),
};

static struct counter_signal ti_eqep_signals[] = {
@@ -325,16 +291,16 @@ static struct counter_signal ti_eqep_signals[] = {
};

static const enum counter_count_function ti_eqep_position_functions[] = {
- [TI_EQEP_COUNT_FUNC_QUAD_COUNT] = COUNTER_COUNT_FUNCTION_QUADRATURE_X4,
- [TI_EQEP_COUNT_FUNC_DIR_COUNT] = COUNTER_COUNT_FUNCTION_PULSE_DIRECTION,
- [TI_EQEP_COUNT_FUNC_UP_COUNT] = COUNTER_COUNT_FUNCTION_INCREASE,
- [TI_EQEP_COUNT_FUNC_DOWN_COUNT] = COUNTER_COUNT_FUNCTION_DECREASE,
+ TI_EQEP_COUNT_FUNC_QUAD_COUNT,
+ TI_EQEP_COUNT_FUNC_DIR_COUNT,
+ TI_EQEP_COUNT_FUNC_UP_COUNT,
+ TI_EQEP_COUNT_FUNC_DOWN_COUNT,
};

static const enum counter_synapse_action ti_eqep_position_synapse_actions[] = {
- [TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
- [TI_EQEP_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE,
- [TI_EQEP_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+ COUNTER_SYNAPSE_ACTION_NONE,
};

static struct counter_synapse ti_eqep_position_synapses[] = {
@@ -406,7 +372,11 @@ static int ti_eqep_probe(struct platform_device *pdev)

priv->counter.name = dev_name(dev);
priv->counter.parent = dev;
- priv->counter.ops = &ti_eqep_counter_ops;
+ priv->counter.count_read = ti_eqep_count_read;
+ priv->counter.count_write = ti_eqep_count_write;
+ priv->counter.function_read = ti_eqep_function_get;
+ priv->counter.function_write = ti_eqep_function_set;
+ priv->counter.action_read = ti_eqep_action_get;
priv->counter.counts = ti_eqep_counts;
priv->counter.num_counts = ARRAY_SIZE(ti_eqep_counts);
priv->counter.signals = ti_eqep_signals;
diff --git a/include/linux/counter.h b/include/linux/counter.h
index 9dbd5df4cd34..d628c7eaf754 100644
--- a/include/linux/counter.h
+++ b/include/linux/counter.h
@@ -6,449 +6,286 @@
#ifndef _COUNTER_H_
#define _COUNTER_H_

-#include <linux/counter_enum.h>
#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
#include <linux/types.h>
+#include <uapi/linux/counter-types.h>

-enum counter_count_direction {
- COUNTER_COUNT_DIRECTION_FORWARD = 0,
- COUNTER_COUNT_DIRECTION_BACKWARD
-};
-extern const char *const counter_count_direction_str[2];
-
-enum counter_count_mode {
- COUNTER_COUNT_MODE_NORMAL = 0,
- COUNTER_COUNT_MODE_RANGE_LIMIT,
- COUNTER_COUNT_MODE_NON_RECYCLE,
- COUNTER_COUNT_MODE_MODULO_N
-};
-extern const char *const counter_count_mode_str[4];
-
-struct counter_device;
-struct counter_signal;
-
-/**
- * struct counter_signal_ext - Counter Signal extensions
- * @name: attribute name
- * @read: read callback for this attribute; may be NULL
- * @write: write callback for this attribute; may be NULL
- * @priv: data private to the driver
- */
-struct counter_signal_ext {
+struct counter_data {
+ enum counter_data_type type;
const char *name;
- ssize_t (*read)(struct counter_device *counter,
- struct counter_signal *signal, void *priv, char *buf);
- ssize_t (*write)(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- const char *buf, size_t len);
+ void *read;
+ void *write;
void *priv;
};

/**
* struct counter_signal - Counter Signal node
- * @id: unique ID used to identify signal
- * @name: device-specific Signal name; ideally, this should match the name
- * as it appears in the datasheet documentation
- * @ext: optional array of Counter Signal extensions
- * @num_ext: number of Counter Signal extensions specified in @ext
- * @priv: optional private data supplied by driver
+ * @id: unique ID used to identify the Signal
+ * @name: device-specific Signal name
+ * @ext: optional array of Signal extensions
+ * @num_ext: number of Signal extensions specified in @ext
*/
struct counter_signal {
int id;
const char *name;

- const struct counter_signal_ext *ext;
+ struct counter_data *ext;
size_t num_ext;
-
- void *priv;
-};
-
-/**
- * struct counter_signal_enum_ext - Signal enum extension attribute
- * @items: Array of strings
- * @num_items: Number of items specified in @items
- * @set: Set callback function; may be NULL
- * @get: Get callback function; may be NULL
- *
- * The counter_signal_enum_ext structure can be used to implement enum style
- * Signal extension attributes. Enum style attributes are those which have a set
- * of strings that map to unsigned integer values. The Generic Counter Signal
- * enum extension helper code takes care of mapping between value and string, as
- * well as generating a "_available" file which contains a list of all available
- * items. The get callback is used to query the currently active item; the index
- * of the item within the respective items array is returned via the 'item'
- * parameter. The set callback is called when the attribute is updated; the
- * 'item' parameter contains the index of the newly activated item within the
- * respective items array.
- */
-struct counter_signal_enum_ext {
- const char * const *items;
- size_t num_items;
- int (*get)(struct counter_device *counter,
- struct counter_signal *signal, size_t *item);
- int (*set)(struct counter_device *counter,
- struct counter_signal *signal, size_t item);
-};
-
-/**
- * COUNTER_SIGNAL_ENUM() - Initialize Signal enum extension
- * @_name: Attribute name
- * @_e: Pointer to a counter_signal_enum_ext structure
- *
- * This should usually be used together with COUNTER_SIGNAL_ENUM_AVAILABLE()
- */
-#define COUNTER_SIGNAL_ENUM(_name, _e) \
-{ \
- .name = (_name), \
- .read = counter_signal_enum_read, \
- .write = counter_signal_enum_write, \
- .priv = (_e) \
-}
-
-/**
- * COUNTER_SIGNAL_ENUM_AVAILABLE() - Initialize Signal enum available extension
- * @_name: Attribute name ("_available" will be appended to the name)
- * @_e: Pointer to a counter_signal_enum_ext structure
- *
- * Creates a read only attribute that lists all the available enum items in a
- * newline separated list. This should usually be used together with
- * COUNTER_SIGNAL_ENUM()
- */
-#define COUNTER_SIGNAL_ENUM_AVAILABLE(_name, _e) \
-{ \
- .name = (_name "_available"), \
- .read = counter_signal_enum_available_read, \
- .priv = (_e) \
-}
-
-enum counter_synapse_action {
- COUNTER_SYNAPSE_ACTION_NONE = 0,
- COUNTER_SYNAPSE_ACTION_RISING_EDGE,
- COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
- COUNTER_SYNAPSE_ACTION_BOTH_EDGES
};

/**
* struct counter_synapse - Counter Synapse node
- * @action: index of current action mode
* @actions_list: array of available action modes
* @num_actions: number of action modes specified in @actions_list
- * @signal: pointer to associated signal
+ * @signal: pointer to the associated Signal
*/
struct counter_synapse {
- size_t action;
const enum counter_synapse_action *actions_list;
size_t num_actions;

struct counter_signal *signal;
};

-struct counter_count;
-
-/**
- * struct counter_count_ext - Counter Count extension
- * @name: attribute name
- * @read: read callback for this attribute; may be NULL
- * @write: write callback for this attribute; may be NULL
- * @priv: data private to the driver
- */
-struct counter_count_ext {
- const char *name;
- ssize_t (*read)(struct counter_device *counter,
- struct counter_count *count, void *priv, char *buf);
- ssize_t (*write)(struct counter_device *counter,
- struct counter_count *count, void *priv,
- const char *buf, size_t len);
- void *priv;
-};
-
-enum counter_count_function {
- COUNTER_COUNT_FUNCTION_INCREASE = 0,
- COUNTER_COUNT_FUNCTION_DECREASE,
- COUNTER_COUNT_FUNCTION_PULSE_DIRECTION,
- COUNTER_COUNT_FUNCTION_QUADRATURE_X1_A,
- COUNTER_COUNT_FUNCTION_QUADRATURE_X1_B,
- COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A,
- COUNTER_COUNT_FUNCTION_QUADRATURE_X2_B,
- COUNTER_COUNT_FUNCTION_QUADRATURE_X4
-};
-
/**
* struct counter_count - Counter Count node
- * @id: unique ID used to identify Count
- * @name: device-specific Count name; ideally, this should match
- * the name as it appears in the datasheet documentation
- * @function: index of current function mode
- * @functions_list: array available function modes
+ * @id: unique ID used to identify the Count
+ * @name: device-specific Count name
+ * @functions_list: array of available function modes
* @num_functions: number of function modes specified in @functions_list
- * @synapses: array of synapses for initialization
- * @num_synapses: number of synapses specified in @synapses
- * @ext: optional array of Counter Count extensions
- * @num_ext: number of Counter Count extensions specified in @ext
- * @priv: optional private data supplied by driver
+ * @synapses: array of Synapses for initialization
+ * @num_synapses: number of Synapses specified in @synapses
+ * @ext: optional array of Count extensions
+ * @num_ext: number of Count extensions specified in @ext
*/
struct counter_count {
int id;
const char *name;

- size_t function;
const enum counter_count_function *functions_list;
size_t num_functions;

struct counter_synapse *synapses;
size_t num_synapses;

- const struct counter_count_ext *ext;
+ struct counter_data *ext;
size_t num_ext;
-
- void *priv;
-};
-
-/**
- * struct counter_count_enum_ext - Count enum extension attribute
- * @items: Array of strings
- * @num_items: Number of items specified in @items
- * @set: Set callback function; may be NULL
- * @get: Get callback function; may be NULL
- *
- * The counter_count_enum_ext structure can be used to implement enum style
- * Count extension attributes. Enum style attributes are those which have a set
- * of strings that map to unsigned integer values. The Generic Counter Count
- * enum extension helper code takes care of mapping between value and string, as
- * well as generating a "_available" file which contains a list of all available
- * items. The get callback is used to query the currently active item; the index
- * of the item within the respective items array is returned via the 'item'
- * parameter. The set callback is called when the attribute is updated; the
- * 'item' parameter contains the index of the newly activated item within the
- * respective items array.
- */
-struct counter_count_enum_ext {
- const char * const *items;
- size_t num_items;
- int (*get)(struct counter_device *counter, struct counter_count *count,
- size_t *item);
- int (*set)(struct counter_device *counter, struct counter_count *count,
- size_t item);
};

/**
- * COUNTER_COUNT_ENUM() - Initialize Count enum extension
- * @_name: Attribute name
- * @_e: Pointer to a counter_count_enum_ext structure
- *
- * This should usually be used together with COUNTER_COUNT_ENUM_AVAILABLE()
- */
-#define COUNTER_COUNT_ENUM(_name, _e) \
-{ \
- .name = (_name), \
- .read = counter_count_enum_read, \
- .write = counter_count_enum_write, \
- .priv = (_e) \
-}
-
-/**
- * COUNTER_COUNT_ENUM_AVAILABLE() - Initialize Count enum available extension
- * @_name: Attribute name ("_available" will be appended to the name)
- * @_e: Pointer to a counter_count_enum_ext structure
- *
- * Creates a read only attribute that lists all the available enum items in a
- * newline separated list. This should usually be used together with
- * COUNTER_COUNT_ENUM()
- */
-#define COUNTER_COUNT_ENUM_AVAILABLE(_name, _e) \
-{ \
- .name = (_name "_available"), \
- .read = counter_count_enum_available_read, \
- .priv = (_e) \
-}
-
-/**
- * struct counter_device_attr_group - internal container for attribute group
+ * struct counter_attribute_group - internal container for attribute group
* @attr_group: Counter sysfs attributes group
* @attr_list: list to keep track of created Counter sysfs attributes
* @num_attr: number of Counter sysfs attributes
*/
-struct counter_device_attr_group {
+struct counter_attribute_group {
struct attribute_group attr_group;
struct list_head attr_list;
size_t num_attr;
};

/**
- * struct counter_device_state - internal state container for a Counter device
+ * struct counter_device - Counter data structure
+ * @name: name of the device
+ * @parent: optional parent device providing the counters
+ * @signal_read: optional read callback for Signals. The read value of
+ * the respective Signal should be passed back via the
+ * value parameter.
+ * @count_read: optional read callback for Counts. The read value of the
+ * respective Count should be passed back via the value
+ * parameter.
+ * @count_write: optional write callback for Counts. The write value for
+ * the respective Count is passed in via the value
+ * parameter.
+ * @function_read: optional read callback the Count function modes. The
+ * read function mode of the respective Count should be
+ * passed back via the function parameter.
+ * @function_write: option write callback for Count function modes. The
+ * function mode to write for the respective Count is
+ * passed in via the function parameter.
+ * @action_read: optional read callback the Synapse action modes. The
+ * read action mode of the respective Synapse should be
+ * passed back via the action parameter.
+ * @action_write: option write callback for Synapse action modes. The
+ * action mode to write for the respective Synapse is
+ * passed in via the action parameter.
+ * @signals: array of Signals
+ * @num_signals: number of Signals specified in @signals
+ * @counts: array of Counts
+ * @num_counts: number of Counts specified in @counts
+ * @ext: optional array of Counter device extensions
+ * @num_ext: number of Counter device extensions specified in @ext
+ * @priv: optional private data supplied by driver
* @id: unique ID used to identify the Counter
* @dev: internal device structure
+ * @synapse_names_list: Synapse names list
* @groups_list: attribute groups list (for Signals, Counts, and ext)
* @num_groups: number of attribute groups containers
* @groups: Counter sysfs attribute groups (to populate @dev.groups)
*/
-struct counter_device_state {
+struct counter_device {
+ const char *name;
+ struct device *parent;
+
+ int (*signal_read)(struct counter_device *counter,
+ struct counter_signal *signal,
+ enum counter_signal_value *value);
+ int (*count_read)(struct counter_device *counter,
+ struct counter_count *count, unsigned long *value);
+ int (*count_write)(struct counter_device *counter,
+ struct counter_count *count, unsigned long value);
+ int (*function_read)(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_function *function);
+ int (*function_write)(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_function function);
+ int (*action_read)(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action);
+ int (*action_write)(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action action);
+
+ struct counter_signal *signals;
+ size_t num_signals;
+ struct counter_count *counts;
+ size_t num_counts;
+
+ struct counter_data *ext;
+ size_t num_ext;
+
+ void *priv;
+
int id;
struct device dev;
- struct counter_device_attr_group *groups_list;
+ struct list_head synapse_names_list;
+ struct counter_attribute_group *groups_list;
size_t num_groups;
const struct attribute_group **groups;
};

-enum counter_signal_value {
- COUNTER_SIGNAL_LOW = 0,
- COUNTER_SIGNAL_HIGH
-};
+int counter_register(struct counter_device *const counter);
+void counter_unregister(struct counter_device *const counter);
+int devm_counter_register(struct device *dev,
+ struct counter_device *const counter);
+void devm_counter_unregister(struct device *dev,
+ struct counter_device *const counter);

-/**
- * struct counter_ops - Callbacks from driver
- * @signal_read: optional read callback for Signal attribute. The read
- * value of the respective Signal should be passed back via
- * the val parameter.
- * @count_read: optional read callback for Count attribute. The read
- * value of the respective Count should be passed back via
- * the val parameter.
- * @count_write: optional write callback for Count attribute. The write
- * value for the respective Count is passed in via the val
- * parameter.
- * @function_get: function to get the current count function mode. Returns
- * 0 on success and negative error code on error. The index
- * of the respective Count's returned function mode should
- * be passed back via the function parameter.
- * @function_set: function to set the count function mode. function is the
- * index of the requested function mode from the respective
- * Count's functions_list array.
- * @action_get: function to get the current action mode. Returns 0 on
- * success and negative error code on error. The index of
- * the respective Synapse's returned action mode should be
- * passed back via the action parameter.
- * @action_set: function to set the action mode. action is the index of
- * the requested action mode from the respective Synapse's
- * actions_list array.
- */
-struct counter_ops {
- int (*signal_read)(struct counter_device *counter,
- struct counter_signal *signal,
- enum counter_signal_value *val);
- int (*count_read)(struct counter_device *counter,
- struct counter_count *count, unsigned long *val);
- int (*count_write)(struct counter_device *counter,
- struct counter_count *count, unsigned long val);
- int (*function_get)(struct counter_device *counter,
- struct counter_count *count, size_t *function);
- int (*function_set)(struct counter_device *counter,
- struct counter_count *count, size_t function);
- int (*action_get)(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse, size_t *action);
- int (*action_set)(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse, size_t action);
-};
+#define COUNTER_DATA_BOOL(_name, _read, _write) \
+{ \
+ .type = COUNTER_DATA_TYPE_BOOL, \
+ .name = (_name), \
+ .read = (_read), \
+ .write = (_write), \
+}

-/**
- * struct counter_device_ext - Counter device extension
- * @name: attribute name
- * @read: read callback for this attribute; may be NULL
- * @write: write callback for this attribute; may be NULL
- * @priv: data private to the driver
- */
-struct counter_device_ext {
- const char *name;
- ssize_t (*read)(struct counter_device *counter, void *priv, char *buf);
- ssize_t (*write)(struct counter_device *counter, void *priv,
- const char *buf, size_t len);
- void *priv;
+#define COUNTER_DATA_UNSIGNED_LONG(_name, _read, _write) \
+{ \
+ .type = COUNTER_DATA_TYPE_UNSIGNED_LONG, \
+ .name = (_name), \
+ .read = (_read), \
+ .write = (_write), \
+}
+
+#define COUNTER_DATA_STRING(_name, _read, _write) \
+{ \
+ .type = COUNTER_DATA_TYPE_STRING, \
+ .name = (_name), \
+ .read = (_read), \
+ .write = (_write), \
+}
+
+struct counter_available {
+ void *items;
+ size_t num_items;
};

-/**
- * struct counter_device_enum_ext - Counter enum extension attribute
- * @items: Array of strings
- * @num_items: Number of items specified in @items
- * @set: Set callback function; may be NULL
- * @get: Get callback function; may be NULL
- *
- * The counter_device_enum_ext structure can be used to implement enum style
- * Counter extension attributes. Enum style attributes are those which have a
- * set of strings that map to unsigned integer values. The Generic Counter enum
- * extension helper code takes care of mapping between value and string, as well
- * as generating a "_available" file which contains a list of all available
- * items. The get callback is used to query the currently active item; the index
- * of the item within the respective items array is returned via the 'item'
- * parameter. The set callback is called when the attribute is updated; the
- * 'item' parameter contains the index of the newly activated item within the
- * respective items array.
- */
-struct counter_device_enum_ext {
+#define DEFINE_COUNTER_AVAILABLE(_name, _items) \
+ struct counter_available _name = { \
+ .items = (_items), \
+ .num_items = ARRAY_SIZE(_items), \
+ }
+
+struct counter_enum {
const char * const *items;
size_t num_items;
- int (*get)(struct counter_device *counter, size_t *item);
- int (*set)(struct counter_device *counter, size_t item);
};

-/**
- * COUNTER_DEVICE_ENUM() - Initialize Counter enum extension
- * @_name: Attribute name
- * @_e: Pointer to a counter_device_enum_ext structure
- *
- * This should usually be used together with COUNTER_DEVICE_ENUM_AVAILABLE()
- */
-#define COUNTER_DEVICE_ENUM(_name, _e) \
+#define DEFINE_COUNTER_ENUM(_name, _items) \
+ struct counter_enum _name = { \
+ .items = (_items), \
+ .num_items = ARRAY_SIZE(_items), \
+ }
+
+#define COUNTER_DATA_ENUM(_name, _get, _set, _enum) \
{ \
+ .type = COUNTER_DATA_TYPE_ENUM, \
.name = (_name), \
- .read = counter_device_enum_read, \
- .write = counter_device_enum_write, \
- .priv = (_e) \
+ .read = (_get), \
+ .write = (_set), \
+ .priv = &(_enum), \
}

-/**
- * COUNTER_DEVICE_ENUM_AVAILABLE() - Initialize Counter enum available extension
- * @_name: Attribute name ("_available" will be appended to the name)
- * @_e: Pointer to a counter_device_enum_ext structure
- *
- * Creates a read only attribute that lists all the available enum items in a
- * newline separated list. This should usually be used together with
- * COUNTER_DEVICE_ENUM()
- */
-#define COUNTER_DEVICE_ENUM_AVAILABLE(_name, _e) \
+#define COUNTER_DATA_ENUM_AVAILABLE(_name, _read, _enum) \
{ \
+ .type = COUNTER_DATA_TYPE_ENUM_AVAILABLE, \
.name = (_name "_available"), \
- .read = counter_device_enum_available_read, \
- .priv = (_e) \
+ .read = (_read), \
+ .priv = &(_enum), \
}

-/**
- * struct counter_device - Counter data structure
- * @name: name of the device as it appears in the datasheet
- * @parent: optional parent device providing the counters
- * @device_state: internal device state container
- * @ops: callbacks from driver
- * @signals: array of Signals
- * @num_signals: number of Signals specified in @signals
- * @counts: array of Counts
- * @num_counts: number of Counts specified in @counts
- * @ext: optional array of Counter device extensions
- * @num_ext: number of Counter device extensions specified in @ext
- * @priv: optional private data supplied by driver
- */
-struct counter_device {
- const char *name;
- struct device *parent;
- struct counter_device_state *device_state;
+#define COUNTER_DATA_ENUM_AND_AVAILABLE(_name, _get, _set, _enum) \
+ COUNTER_DATA_ENUM(_name, _get, _set, _enum), \
+ COUNTER_DATA_ENUM_AVAILABLE(_name, _get, _enum)

- const struct counter_ops *ops;
+#define COUNTER_DATA_CEILING(_read, _write) \
+ COUNTER_DATA_UNSIGNED_LONG("ceiling", _read, _write)

- struct counter_signal *signals;
- size_t num_signals;
- struct counter_count *counts;
- size_t num_counts;
+#define COUNTER_DATA_COUNT_MODE(_read, _write) \
+{ \
+ .type = COUNTER_DATA_TYPE_COUNT_MODE, \
+ .name = "count_mode", \
+ .read = (_read), \
+ .write = (_write), \
+}

- const struct counter_device_ext *ext;
- size_t num_ext;
+#define COUNTER_DATA_COUNT_MODE_AVAILABLE(_read, _available) \
+{ \
+ .type = COUNTER_DATA_TYPE_COUNT_MODE_AVAILABLE, \
+ .name = "count_mode_available", \
+ .read = (_read), \
+ .priv = &(_available), \
+}

- void *priv;
-};
+#define COUNTER_DATA_COUNT_MODE_AND_AVAILABLE(_read, _write, _available) \
+ COUNTER_DATA_COUNT_MODE(_read, _write), \
+ COUNTER_DATA_COUNT_MODE_AVAILABLE(_read, _available)

-int counter_register(struct counter_device *const counter);
-void counter_unregister(struct counter_device *const counter);
-int devm_counter_register(struct device *dev,
- struct counter_device *const counter);
-void devm_counter_unregister(struct device *dev,
- struct counter_device *const counter);
+#define COUNTER_DATA_DIRECTION(_read) \
+{ \
+ .type = COUNTER_DATA_TYPE_COUNT_DIRECTION, \
+ .name = "direction", \
+ .read = (_read), \
+}
+
+#define COUNTER_DATA_ENABLE(_read, _write) \
+ COUNTER_DATA_BOOL("enable", _read, _write)
+
+#define COUNTER_DATA_ERROR_NOISE_AND_AVAILABLE(_read, _available) \
+ COUNTER_DATA_STRING("error_noise", _read, NULL), \
+ COUNTER_DATA_STRING("error_noise_available", _available, NULL)
+
+#define COUNTER_DATA_FLOOR(_read, _write) \
+ COUNTER_DATA_UNSIGNED_LONG("floor", _read, _write)
+
+#define COUNTER_DATA_PRESET(_read, _write) \
+ COUNTER_DATA_UNSIGNED_LONG("preset", _read, _write)
+
+#define COUNTER_DATA_PRESET_ENABLE(_read, _write) \
+ COUNTER_DATA_BOOL("preset_enable", _read, _write)

#endif /* _COUNTER_H_ */
diff --git a/include/linux/counter_enum.h b/include/linux/counter_enum.h
deleted file mode 100644
index 9f917298a88f..000000000000
--- a/include/linux/counter_enum.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Counter interface enum functions
- * Copyright (C) 2018 William Breathitt Gray
- */
-#ifndef _COUNTER_ENUM_H_
-#define _COUNTER_ENUM_H_
-
-#include <linux/types.h>
-
-struct counter_device;
-struct counter_signal;
-struct counter_count;
-
-ssize_t counter_signal_enum_read(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- char *buf);
-ssize_t counter_signal_enum_write(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- const char *buf, size_t len);
-
-ssize_t counter_signal_enum_available_read(struct counter_device *counter,
- struct counter_signal *signal,
- void *priv, char *buf);
-
-ssize_t counter_count_enum_read(struct counter_device *counter,
- struct counter_count *count, void *priv,
- char *buf);
-ssize_t counter_count_enum_write(struct counter_device *counter,
- struct counter_count *count, void *priv,
- const char *buf, size_t len);
-
-ssize_t counter_count_enum_available_read(struct counter_device *counter,
- struct counter_count *count,
- void *priv, char *buf);
-
-ssize_t counter_device_enum_read(struct counter_device *counter, void *priv,
- char *buf);
-ssize_t counter_device_enum_write(struct counter_device *counter, void *priv,
- const char *buf, size_t len);
-
-ssize_t counter_device_enum_available_read(struct counter_device *counter,
- void *priv, char *buf);
-
-#endif /* _COUNTER_ENUM_H_ */
diff --git a/include/uapi/linux/counter-types.h b/include/uapi/linux/counter-types.h
new file mode 100644
index 000000000000..757256775949
--- /dev/null
+++ b/include/uapi/linux/counter-types.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Counter interface data types
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#ifndef _UAPI_COUNTER_TYPES_H_
+#define _UAPI_COUNTER_TYPES_H_
+
+enum counter_count_direction {
+ COUNTER_COUNT_DIRECTION_FORWARD = 0,
+ COUNTER_COUNT_DIRECTION_BACKWARD
+};
+
+enum counter_count_mode {
+ COUNTER_COUNT_MODE_NORMAL = 0,
+ COUNTER_COUNT_MODE_RANGE_LIMIT,
+ COUNTER_COUNT_MODE_NON_RECYCLE,
+ COUNTER_COUNT_MODE_MODULO_N
+};
+
+enum counter_count_function {
+ COUNTER_COUNT_FUNCTION_INCREASE = 0,
+ COUNTER_COUNT_FUNCTION_DECREASE,
+ COUNTER_COUNT_FUNCTION_PULSE_DIRECTION,
+ COUNTER_COUNT_FUNCTION_QUADRATURE_X1_A,
+ COUNTER_COUNT_FUNCTION_QUADRATURE_X1_B,
+ COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A,
+ COUNTER_COUNT_FUNCTION_QUADRATURE_X2_B,
+ COUNTER_COUNT_FUNCTION_QUADRATURE_X4
+};
+
+enum counter_signal_value {
+ COUNTER_SIGNAL_LOW = 0,
+ COUNTER_SIGNAL_HIGH
+};
+
+enum counter_synapse_action {
+ COUNTER_SYNAPSE_ACTION_NONE = 0,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+ COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES
+};
+
+enum counter_data_type {
+ COUNTER_DATA_TYPE_BOOL = 0,
+ COUNTER_DATA_TYPE_UNSIGNED_LONG,
+ COUNTER_DATA_TYPE_SIZE,
+ COUNTER_DATA_TYPE_STRING,
+ COUNTER_DATA_TYPE_COUNT_FUNCTION,
+ COUNTER_DATA_TYPE_COUNT_FUNCTION_AVAILABLE,
+ COUNTER_DATA_TYPE_SIGNAL,
+ COUNTER_DATA_TYPE_SYNAPSE_ACTION,
+ COUNTER_DATA_TYPE_SYNAPSE_ACTION_AVAILABLE,
+ COUNTER_DATA_TYPE_ENUM,
+ COUNTER_DATA_TYPE_ENUM_AVAILABLE,
+ COUNTER_DATA_TYPE_COUNT_DIRECTION,
+ COUNTER_DATA_TYPE_COUNT_MODE,
+ COUNTER_DATA_TYPE_COUNT_MODE_AVAILABLE,
+};
+
+enum counter_owner_type {
+ COUNTER_OWNER_TYPE_DEVICE,
+ COUNTER_OWNER_TYPE_SIGNAL,
+ COUNTER_OWNER_TYPE_COUNT,
+};
+
+#endif /* _UAPI_COUNTER_TYPES_H_ */
--
2.26.2

Next message: Andy Shevchenko: "Re: [PATCH v4 0/4] Add XHCI, EHCI and OHCI support for Broadcom STB SoS's"
Previous message: William Breathitt Gray: "[PATCH 3/4] counter: Add character device interface"
In reply to: kbuild test robot: "Re: [PATCH 3/4] counter: Add character device interface"
Next in thread: kbuild test robot: "Re: [PATCH 1/4] counter: Internalize sysfs interface code"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]