Re: [PATCH 08/11] Input: synaptics-rmi4 - use rmi_read/rmi_write in F01

From: Christopher Heiny
Date: Thu Feb 13 2014 - 16:33:23 EST

On 02/12/2014 09:27 PM, Dmitry Torokhov wrote:
Use rmi_read()/rmi_write() for reading/writing single-byte data. Also print
error code when IO fails.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>

Acked-by: Christopher Heiny <cheiny@xxxxxxxxxxxxx>

---
drivers/input/rmi4/rmi_f01.c | 170 ++++++++++++++++++++++---------------------
1 file changed, 88 insertions(+), 82 deletions(-)

diff --git a/drivers/input/rmi4/rmi_f01.c b/drivers/input/rmi4/rmi_f01.c
index 1219e0c..a2f05bc 100644
--- a/drivers/input/rmi4/rmi_f01.c
+++ b/drivers/input/rmi4/rmi_f01.c
@@ -171,8 +171,9 @@ static int rmi_f01_read_properties(struct rmi_device *rmi_dev,

error = rmi_read_block(rmi_dev, query_base_addr,
basic_query, sizeof(basic_query));
- if (error < 0) {
- dev_err(&rmi_dev->dev, "Failed to read device query registers.\n");
+ if (error) {
+ dev_err(&rmi_dev->dev,
+ "Failed to read device query registers: %d\n", error);
return error;
}

@@ -205,25 +206,25 @@ static int rmi_f01_initialize(struct rmi_function *fn)
{
u8 temp;
int error;
- u16 ctrl_base_addr;
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *driver_data = dev_get_drvdata(&rmi_dev->dev);
struct f01_data *f01 = fn->data;
- struct rmi_device_platform_data *pdata = to_rmi_platform_data(rmi_dev);
+ const struct rmi_device_platform_data *pdata = to_rmi_platform_data(rmi_dev);
+ u16 ctrl_base_addr = fn->fd.control_base_addr;
u8 device_status;

/*
* Set the configured bit and (optionally) other important stuff
* in the device control register.
*/
- ctrl_base_addr = fn->fd.control_base_addr;
- error = rmi_read_block(rmi_dev, fn->fd.control_base_addr,
- &f01->device_control.ctrl0,
- sizeof(f01->device_control.ctrl0));
- if (error < 0) {
- dev_err(&fn->dev, "Failed to read F01 control.\n");
+
+ error = rmi_read(rmi_dev, fn->fd.control_base_addr,
+ &f01->device_control.ctrl0);
+ if (error) {
+ dev_err(&fn->dev, "Failed to read F01 control: %d\n", error);
return error;
}
+
switch (pdata->power_management.nosleep) {
case RMI_F01_NOSLEEP_DEFAULT:
break;
@@ -249,11 +250,10 @@ static int rmi_f01_initialize(struct rmi_function *fn)

f01->device_control.ctrl0 |= RMI_F01_CRTL0_CONFIGURED_BIT;

- error = rmi_write_block(rmi_dev, fn->fd.control_base_addr,
- &f01->device_control.ctrl0,
- sizeof(f01->device_control.ctrl0));
- if (error < 0) {
- dev_err(&fn->dev, "Failed to write F01 control.\n");
+ error = rmi_write(rmi_dev, fn->fd.control_base_addr,
+ f01->device_control.ctrl0);
+ if (error) {
+ dev_err(&fn->dev, "Failed to write F01 control: %d\n", error);
return error;
}

@@ -265,9 +265,10 @@ static int rmi_f01_initialize(struct rmi_function *fn)
error = rmi_read_block(rmi_dev, ctrl_base_addr,
f01->device_control.interrupt_enable,
sizeof(u8) * (f01->num_of_irq_regs));
- if (error < 0) {
+ if (error) {
dev_err(&fn->dev,
- "Failed to read F01 control interrupt enable register.\n");
+ "Failed to read F01 control interrupt enable register: %d\n",
+ error);
return error;
}

@@ -302,8 +303,10 @@ static int rmi_f01_initialize(struct rmi_function *fn)
} else {
error = rmi_read(rmi_dev, f01->doze_interval_addr,
&f01->device_control.doze_interval);
- if (error < 0) {
- dev_err(&fn->dev, "Failed to read F01 doze interval register.\n");
+ if (error) {
+ dev_err(&fn->dev,
+ "Failed to read F01 doze interval register: %d\n",
+ error);
return error;
}
}
@@ -318,7 +321,9 @@ static int rmi_f01_initialize(struct rmi_function *fn)
error = rmi_read(rmi_dev, f01->wakeup_threshold_addr,
&f01->device_control.wakeup_threshold);
if (error < 0) {
- dev_err(&fn->dev, "Failed to read F01 wakeup threshold register.\n");
+ dev_err(&fn->dev,
+ "Failed to read F01 wakeup threshold register: %d\n",
+ error);
return error;
}
}
@@ -337,17 +342,19 @@ static int rmi_f01_initialize(struct rmi_function *fn)
} else {
error = rmi_read(rmi_dev, f01->doze_holdoff_addr,
&f01->device_control.doze_holdoff);
- if (error < 0) {
- dev_err(&fn->dev, "Failed to read F01 doze holdoff register.\n");
+ if (error) {
+ dev_err(&fn->dev,
+ "Failed to read F01 doze holdoff register: %d\n",
+ error);
return error;
}
}
}

- error = rmi_read_block(rmi_dev, fn->fd.data_base_addr,
- &device_status, sizeof(device_status));
+ error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
if (error < 0) {
- dev_err(&fn->dev, "Failed to read device status.\n");
+ dev_err(&fn->dev,
+ "Failed to read device status: %d\n", error);
return error;
}

@@ -364,50 +371,53 @@ static int rmi_f01_initialize(struct rmi_function *fn)
static int rmi_f01_config(struct rmi_function *fn)
{
struct f01_data *f01 = fn->data;
- int retval;
-
- retval = rmi_write_block(fn->rmi_dev, fn->fd.control_base_addr,
- &f01->device_control.ctrl0,
- sizeof(f01->device_control.ctrl0));
- if (retval < 0) {
- dev_err(&fn->dev, "Failed to write device_control.reg.\n");
- return retval;
+ int error;
+
+ error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
+ f01->device_control.ctrl0);
+ if (error) {
+ dev_err(&fn->dev,
+ "Failed to write device_control register: %d\n", error);
+ return error;
}

- retval = rmi_write_block(fn->rmi_dev, f01->interrupt_enable_addr,
- f01->device_control.interrupt_enable,
- sizeof(u8) * f01->num_of_irq_regs);
- if (retval < 0) {
- dev_err(&fn->dev, "Failed to write interrupt enable.\n");
- return retval;
+ error = rmi_write_block(fn->rmi_dev, f01->interrupt_enable_addr,
+ f01->device_control.interrupt_enable,
+ sizeof(u8) * f01->num_of_irq_regs);
+ if (error) {
+ dev_err(&fn->dev,
+ "Failed to write interrupt enable: %d\n", error);
+ return error;
}

if (f01->properties.has_adjustable_doze) {
- retval = rmi_write_block(fn->rmi_dev, f01->doze_interval_addr,
- &f01->device_control.doze_interval,
- sizeof(u8));
- if (retval < 0) {
- dev_err(&fn->dev, "Failed to write doze interval.\n");
- return retval;
+ error = rmi_write(fn->rmi_dev, f01->doze_interval_addr,
+ f01->device_control.doze_interval);
+ if (error) {
+ dev_err(&fn->dev,
+ "Failed to write doze interval: %d\n", error);
+ return error;
}

- retval = rmi_write_block(fn->rmi_dev,
+ error = rmi_write_block(fn->rmi_dev,
f01->wakeup_threshold_addr,
&f01->device_control.wakeup_threshold,
sizeof(u8));
- if (retval < 0) {
- dev_err(&fn->dev, "Failed to write wakeup threshold.\n");
- return retval;
+ if (error) {
+ dev_err(&fn->dev,
+ "Failed to write wakeup threshold: %d\n",
+ error);
+ return error;
}
}

if (f01->properties.has_adjustable_doze_holdoff) {
- retval = rmi_write_block(fn->rmi_dev, f01->doze_holdoff_addr,
- &f01->device_control.doze_holdoff,
- sizeof(u8));
- if (retval < 0) {
- dev_err(&fn->dev, "Failed to write doze holdoff.\n");
- return retval;
+ error = rmi_write(fn->rmi_dev, f01->doze_holdoff_addr,
+ f01->device_control.doze_holdoff);
+ if (error) {
+ dev_err(&fn->dev,
+ "Failed to write doze holdoff: %d\n", error);
+ return error;
}
}

@@ -439,23 +449,19 @@ static int rmi_f01_suspend(struct device *dev)
struct f01_data *f01 = fn->data;
int error;

- f01->old_nosleep = f01->device_control.ctrl0 &
- RMI_F01_CRTL0_NOSLEEP_BIT;
+ f01->old_nosleep =
+ f01->device_control.ctrl0 & RMI_F01_CRTL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CRTL0_NOSLEEP_BIT;

f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_SENSOR_SLEEP;

- error = rmi_write_block(rmi_dev,
- fn->fd.control_base_addr,
- &f01->device_control.ctrl0,
- sizeof(f01->device_control.ctrl0));
- if (error < 0) {
- dev_err(&fn->dev, "Failed to write sleep mode. Code: %d.\n",
- error);
+ error = rmi_write(rmi_dev, fn->fd.control_base_addr,
+ f01->device_control.ctrl0);
+ if (error) {
+ dev_err(&fn->dev, "Failed to write sleep mode: %d.\n", error);
if (f01->old_nosleep)
- f01->device_control.ctrl0 |=
- RMI_F01_CRTL0_NOSLEEP_BIT;
+ f01->device_control.ctrl0 |= RMI_F01_CRTL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
return error;
@@ -477,13 +483,11 @@ static int rmi_f01_resume(struct device *dev)
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;

- error = rmi_write_block(rmi_dev, fn->fd.control_base_addr,
- &f01->device_control.ctrl0,
- sizeof(f01->device_control.ctrl0));
- if (error < 0) {
+ error = rmi_write(rmi_dev, fn->fd.control_base_addr,
+ f01->device_control.ctrl0);
+ if (error) {
dev_err(&fn->dev,
- "Failed to restore normal operation. Code: %d.\n",
- error);
+ "Failed to restore normal operation: %d.\n", error);
return error;
}

@@ -497,23 +501,25 @@ static int rmi_f01_attention(struct rmi_function *fn,
unsigned long *irq_bits)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
- int retval;
+ int error;
u8 device_status;

- retval = rmi_read_block(rmi_dev, fn->fd.data_base_addr,
- &device_status, sizeof(device_status));
- if (retval < 0) {
- dev_err(&fn->dev, "Failed to read device status, code: %d.\n",
- retval);
- return retval;
+ error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
+ if (error) {
+ dev_err(&fn->dev,
+ "Failed to read device status: %d.\n", error);
+ return error;
}

if (RMI_F01_STATUS_UNCONFIGURED(device_status)) {
dev_warn(&fn->dev, "Device reset detected.\n");
- retval = rmi_dev->driver->reset_handler(rmi_dev);
- if (retval < 0)
- return retval;
+ error = rmi_dev->driver->reset_handler(rmi_dev);
+ if (error) {
+ dev_err(&fn->dev, "Device reset failed: %d\n", error);
+ return error;
+ }
}
+
return 0;
}




--

Christopher Heiny
Senior Staff Firmware Engineer
Synaptics Incorporated
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