[PATCH 1/2] iio: mma8452: add support for 3 more accelerometer chips
From: Martin Kepplinger
Date: Tue Jun 30 2015 - 07:29:10 EST
The one that supports the existing event interrupt settings, uses it. The
others use their motion detection interrupts.
This is tested on the MMA8653FC.
Signed-off-by: Martin Kepplinger <martin.kepplinger@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Christoph Muellner <christoph.muellner@xxxxxxxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/iio/accel/mma8452.txt | 21 ++
drivers/iio/accel/Kconfig | 6 +-
drivers/iio/accel/mma8452.c | 328 +++++++++++++++++----
3 files changed, 290 insertions(+), 65 deletions(-)
create mode 100644 Documentation/devicetree/bindings/iio/accel/mma8452.txt
diff --git a/Documentation/devicetree/bindings/iio/accel/mma8452.txt b/Documentation/devicetree/bindings/iio/accel/mma8452.txt
new file mode 100644
index 0000000..8d98e05
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/accel/mma8452.txt
@@ -0,0 +1,21 @@
+Freescale MMA8452Q, MMA8453Q, MMA8652FC or MMA8653FC triaxial accelerometer
+
+Required properties:
+
+ - compatible: should be "fsl,mma8653", "fsl,mma8652", "fsl,mma8453" or
+ "fsl,mma8452" respectively.
+ - reg: the I2C address of the chip
+
+Optional properties:
+
+ - interrupt-parent: should be the phandle for the interrupt controller
+ - interrupts: interrupt mapping for GPIO IRQ
+
+Example:
+
+ mma8653fc@1d {
+ compatible = "fsl,mma8653";
+ reg = <0x1d>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <5 0>;
+ };
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 00e7bcb..684c8b5 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -87,13 +87,13 @@ config KXSD9
will be called kxsd9.
config MMA8452
- tristate "Freescale MMA8452Q Accelerometer Driver"
+ tristate "Freescale MMA8452 Accelerometer Driver"
depends on I2C
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
help
- Say yes here to build support for the Freescale MMA8452Q 3-axis
- accelerometer.
+ Say yes here to build support for the following Freescale 3-axis
+ accelerometers: MMA8452Q, MMA8453Q, MMA8652FC, MMA8653FC.
To compile this driver as a module, choose M here: the module
will be called mma8452.
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index e8e2077..a5fd3ff 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -1,6 +1,12 @@
/*
- * mma8452.c - Support for Freescale MMA8452Q 3-axis 12-bit accelerometer
+ * mma8452.c - Support for following Freescale 3-axis accelerometers:
*
+ * MMA8452Q
+ * MMA8453Q
+ * MMA8652FC
+ * MMA8653FC
+ *
+ * Copyright 2015 Martin Kepplinger <martin.kepplinger@xxxxxxxxxxxxxxxxxxxxx>
* Copyright 2014 Peter Meerwald <pmeerw@xxxxxxxxxx>
*
* This file is subject to the terms and conditions of version 2 of
@@ -23,9 +29,12 @@
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/events.h>
#include <linux/delay.h>
+#include <linux/of_device.h>
+
+#define DRIVER_NAME "mma8452"
#define MMA8452_STATUS 0x00
-#define MMA8452_OUT_X 0x01 /* MSB first, 12-bit */
+#define MMA8452_OUT_X 0x01 /* MSB first, 10 or 12-bit */
#define MMA8452_OUT_Y 0x03
#define MMA8452_OUT_Z 0x05
#define MMA8452_INT_SRC 0x0c
@@ -33,9 +42,18 @@
#define MMA8452_DATA_CFG 0x0e
#define MMA8452_HP_FILTER_CUTOFF 0x0f
#define MMA8452_HP_FILTER_CUTOFF_SEL_MASK (BIT(0) | BIT(1))
+#define MMA8452_FF_MT_CFG 0x15
+#define MMA8452_FF_MT_CFG_OAE BIT(6)
+#define MMA8452_FF_MT_CFG_ELE BIT(7)
+#define MMA8452_FF_MT_SRC 0x16
+#define MMA8452_FF_MT_SRC_XHE BIT(1)
+#define MMA8452_FF_MT_SRC_YHE BIT(3)
+#define MMA8452_FF_MT_SRC_ZHE BIT(5)
+#define MMA8452_FF_MT_THS 0x17
+#define MMA8452_FF_MT_THS_MASK 0x7f
+#define MMA8452_FF_MT_COUNT 0x18
#define MMA8452_TRANSIENT_CFG 0x1d
#define MMA8452_TRANSIENT_CFG_ELE BIT(4)
-#define MMA8452_TRANSIENT_CFG_CHAN(chan) BIT(chan + 1)
#define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0)
#define MMA8452_TRANSIENT_SRC 0x1e
#define MMA8452_TRANSIENT_SRC_XTRANSE BIT(1)
@@ -69,15 +87,38 @@
#define MMA8452_DATA_CFG_HPF_MASK BIT(4)
#define MMA8452_INT_DRDY BIT(0)
+#define MMA8452_INT_FF_MT BIT(2)
#define MMA8452_INT_TRANS BIT(5)
#define MMA8452_DEVICE_ID 0x2a
+#define MMA8453_DEVICE_ID 0x3a
+#define MMA8652_DEVICE_ID 0x4a
+#define MMA8653_DEVICE_ID 0x5a
struct mma8452_data {
struct i2c_client *client;
struct mutex lock;
u8 ctrl_reg1;
u8 data_cfg;
+ const struct mma_chip_info *chip_info;
+};
+
+struct mma_chip_info {
+ u8 chip_id;
+ const struct iio_chan_spec *channels;
+ int num_channels;
+ /* 3 modes: 2g, 4g, 8g; 2 ints: m/s^2 and micro m/s^2 */
+ const int mma_scales[3][2];
+ u8 ev_cfg;
+ u8 ev_cfg_ele;
+ u8 ev_cfg_chan_shift;
+ u8 ev_src;
+ u8 ev_src_xe;
+ u8 ev_src_ye;
+ u8 ev_src_ze;
+ u8 ev_ths;
+ u8 ev_ths_mask;
+ u8 ev_count;
};
static int mma8452_drdy(struct mma8452_data *data)
@@ -143,16 +184,6 @@ static const int mma8452_samp_freq[8][2] = {
{6, 250000}, {1, 560000}
};
-/*
- * Hardware has fullscale of -2G, -4G, -8G corresponding to raw value -2048
- * The userspace interface uses m/s^2 and we declare micro units
- * So scale factor is given by:
- * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665
- */
-static const int mma8452_scales[3][2] = {
- {0, 9577}, {0, 19154}, {0, 38307}
-};
-
/* Datasheet table 35 (step time vs sample frequency) */
static const int mma8452_transient_time_step_us[8] = {
1250,
@@ -187,8 +218,11 @@ static ssize_t mma8452_show_samp_freq_avail(struct device *dev,
static ssize_t mma8452_show_scale_avail(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return mma8452_show_int_plus_micros(buf, mma8452_scales,
- ARRAY_SIZE(mma8452_scales));
+ struct mma8452_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+
+ return mma8452_show_int_plus_micros(buf, data->chip_info->mma_scales,
+ ARRAY_SIZE(data->chip_info->mma_scales));
}
static ssize_t mma8452_show_hp_cutoff_avail(struct device *dev,
@@ -219,8 +253,8 @@ static int mma8452_get_samp_freq_index(struct mma8452_data *data,
static int mma8452_get_scale_index(struct mma8452_data *data,
int val, int val2)
{
- return mma8452_get_int_plus_micros_index(mma8452_scales,
- ARRAY_SIZE(mma8452_scales), val, val2);
+ return mma8452_get_int_plus_micros_index(data->chip_info->mma_scales,
+ ARRAY_SIZE(data->chip_info->mma_scales), val, val2);
}
static int mma8452_get_hp_filter_index(struct mma8452_data *data,
@@ -229,7 +263,7 @@ static int mma8452_get_hp_filter_index(struct mma8452_data *data,
int i = mma8452_get_odr_index(data);
return mma8452_get_int_plus_micros_index(mma8452_hp_filter_cutoff[i],
- ARRAY_SIZE(mma8452_scales[0]), val, val2);
+ ARRAY_SIZE(data->chip_info->mma_scales[0]), val, val2);
}
static int mma8452_read_hp_filter(struct mma8452_data *data, int *hz, int *uHz)
@@ -266,13 +300,14 @@ static int mma8452_read_raw(struct iio_dev *indio_dev,
mutex_unlock(&data->lock);
if (ret < 0)
return ret;
- *val = sign_extend32(
- be16_to_cpu(buffer[chan->scan_index]) >> 4, 11);
+ *val = sign_extend32(be16_to_cpu(
+ buffer[chan->scan_index]) >> chan->scan_type.shift,
+ chan->scan_type.realbits - 1);
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
i = data->data_cfg & MMA8452_DATA_CFG_FS_MASK;
- *val = mma8452_scales[i][0];
- *val2 = mma8452_scales[i][1];
+ *val = data->chip_info->mma_scales[i][0];
+ *val2 = data->chip_info->mma_scales[i][1];
return IIO_VAL_INT_PLUS_MICRO;
case IIO_CHAN_INFO_SAMP_FREQ:
i = mma8452_get_odr_index(data);
@@ -420,16 +455,16 @@ static int mma8452_read_thresh(struct iio_dev *indio_dev,
switch (info) {
case IIO_EV_INFO_VALUE:
ret = i2c_smbus_read_byte_data(data->client,
- MMA8452_TRANSIENT_THS);
+ data->chip_info->ev_ths);
if (ret < 0)
return ret;
- *val = ret & MMA8452_TRANSIENT_THS_MASK;
+ *val = ret & data->chip_info->ev_ths_mask;
return IIO_VAL_INT;
case IIO_EV_INFO_PERIOD:
ret = i2c_smbus_read_byte_data(data->client,
- MMA8452_TRANSIENT_COUNT);
+ data->chip_info->ev_count);
if (ret < 0)
return ret;
@@ -472,8 +507,11 @@ static int mma8452_write_thresh(struct iio_dev *indio_dev,
switch (info) {
case IIO_EV_INFO_VALUE:
- return mma8452_change_config(data, MMA8452_TRANSIENT_THS,
- val & MMA8452_TRANSIENT_THS_MASK);
+ if (val < 0 || val > 127) /* LSB 0.6178 m/s^2 */
+ return -EINVAL;
+
+ return mma8452_change_config(data, data->chip_info->ev_ths,
+ val);
case IIO_EV_INFO_PERIOD:
steps = (val * USEC_PER_SEC + val2) /
@@ -483,8 +521,9 @@ static int mma8452_write_thresh(struct iio_dev *indio_dev,
if (steps > 0xff)
return -EINVAL;
- return mma8452_change_config(data, MMA8452_TRANSIENT_COUNT,
+ return mma8452_change_config(data, data->chip_info->ev_count,
steps);
+
case IIO_EV_INFO_HIGH_PASS_FILTER_3DB:
reg = i2c_smbus_read_byte_data(data->client,
MMA8452_TRANSIENT_CFG);
@@ -512,13 +551,15 @@ static int mma8452_read_event_config(struct iio_dev *indio_dev,
enum iio_event_direction dir)
{
struct mma8452_data *data = iio_priv(indio_dev);
+ const struct mma_chip_info *chip = data->chip_info;
int ret;
- ret = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_CFG);
+ ret = i2c_smbus_read_byte_data(data->client,
+ data->chip_info->ev_cfg);
if (ret < 0)
return ret;
- return ret & MMA8452_TRANSIENT_CFG_CHAN(chan->scan_index) ? 1 : 0;
+ return ret & BIT(chan->scan_index + chip->ev_cfg_chan_shift) ? 1 : 0;
}
static int mma8452_write_event_config(struct iio_dev *indio_dev,
@@ -528,47 +569,53 @@ static int mma8452_write_event_config(struct iio_dev *indio_dev,
int state)
{
struct mma8452_data *data = iio_priv(indio_dev);
+ const struct mma_chip_info *chip = data->chip_info;
int val;
- val = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_CFG);
+ val = i2c_smbus_read_byte_data(data->client, chip->ev_cfg);
if (val < 0)
return val;
if (state)
- val |= MMA8452_TRANSIENT_CFG_CHAN(chan->scan_index);
+ val |= BIT(chan->scan_index + chip->ev_cfg_chan_shift);
else
- val &= ~MMA8452_TRANSIENT_CFG_CHAN(chan->scan_index);
+ val &= ~BIT(chan->scan_index + chip->ev_cfg_chan_shift);
- val |= MMA8452_TRANSIENT_CFG_ELE;
+ val |= chip->ev_cfg_ele;
+ val |= MMA8452_FF_MT_CFG_OAE; /* motion mode */
- return mma8452_change_config(data, MMA8452_TRANSIENT_CFG, val);
+ return mma8452_change_config(data, chip->ev_cfg, val);
}
static void mma8452_transient_interrupt(struct iio_dev *indio_dev)
{
struct mma8452_data *data = iio_priv(indio_dev);
s64 ts = iio_get_time_ns();
- int src;
+ int src, ff;
- src = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_SRC);
+ src = i2c_smbus_read_byte_data(data->client, data->chip_info->ev_src);
if (src < 0)
return;
- if (src & MMA8452_TRANSIENT_SRC_XTRANSE)
+ ff = i2c_smbus_read_byte_data(data->client, data->chip_info->ev_cfg);
+ if (ff < 0)
+ return;
+
+ if (src & data->chip_info->ev_src_xe)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_RISING),
ts);
- if (src & MMA8452_TRANSIENT_SRC_YTRANSE)
+ if (src & data->chip_info->ev_src_ye)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Y,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_RISING),
ts);
- if (src & MMA8452_TRANSIENT_SRC_ZTRANSE)
+ if (src & data->chip_info->ev_src_ze)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Z,
IIO_EV_TYPE_THRESH,
@@ -580,6 +627,7 @@ static irqreturn_t mma8452_interrupt(int irq, void *p)
{
struct iio_dev *indio_dev = p;
struct mma8452_data *data = iio_priv(indio_dev);
+ const struct mma_chip_info *chip = data->chip_info;
int ret = IRQ_NONE;
int src;
@@ -592,7 +640,10 @@ static irqreturn_t mma8452_interrupt(int irq, void *p)
ret = IRQ_HANDLED;
}
- if (src & MMA8452_INT_TRANS) {
+ if ((src & MMA8452_INT_TRANS &&
+ chip->ev_src == MMA8452_TRANSIENT_SRC) ||
+ (src & MMA8452_INT_FF_MT &&
+ chip->ev_src == MMA8452_FF_MT_SRC)) {
mma8452_transient_interrupt(indio_dev);
ret = IRQ_HANDLED;
}
@@ -653,6 +704,16 @@ static const struct iio_event_spec mma8452_transient_event[] = {
},
};
+static const struct iio_event_spec mma8452_motion_event[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_PERIOD)
+ },
+};
+
/*
* Threshold is configured in fixed 8G/127 steps regardless of
* currently selected scale for measurement.
@@ -666,10 +727,9 @@ static struct attribute *mma8452_event_attributes[] = {
static struct attribute_group mma8452_event_attribute_group = {
.attrs = mma8452_event_attributes,
- .name = "events",
};
-#define MMA8452_CHANNEL(axis, idx) { \
+#define MMA8452_CHANNEL(axis, idx, bits) { \
.type = IIO_ACCEL, \
.modified = 1, \
.channel2 = IIO_MOD_##axis, \
@@ -681,22 +741,145 @@ static struct attribute_group mma8452_event_attribute_group = {
.scan_index = idx, \
.scan_type = { \
.sign = 's', \
- .realbits = 12, \
+ .realbits = (bits), \
.storagebits = 16, \
- .shift = 4, \
+ .shift = 16 - (bits), \
.endianness = IIO_BE, \
}, \
.event_spec = mma8452_transient_event, \
.num_event_specs = ARRAY_SIZE(mma8452_transient_event), \
}
+#define MMA8652_CHANNEL(axis, idx, bits) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .scan_index = idx, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 16 - (bits), \
+ .endianness = IIO_BE, \
+ }, \
+ .event_spec = mma8452_motion_event, \
+ .num_event_specs = ARRAY_SIZE(mma8452_motion_event), \
+}
+
static const struct iio_chan_spec mma8452_channels[] = {
- MMA8452_CHANNEL(X, 0),
- MMA8452_CHANNEL(Y, 1),
- MMA8452_CHANNEL(Z, 2),
+ MMA8452_CHANNEL(X, 0, 12),
+ MMA8452_CHANNEL(Y, 1, 12),
+ MMA8452_CHANNEL(Z, 2, 12),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_chan_spec mma8453_channels[] = {
+ MMA8452_CHANNEL(X, 0, 10),
+ MMA8452_CHANNEL(Y, 1, 10),
+ MMA8452_CHANNEL(Z, 2, 10),
IIO_CHAN_SOFT_TIMESTAMP(3),
};
+static const struct iio_chan_spec mma8652_channels[] = {
+ MMA8652_CHANNEL(X, 0, 12),
+ MMA8652_CHANNEL(Y, 1, 12),
+ MMA8652_CHANNEL(Z, 2, 12),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_chan_spec mma8653_channels[] = {
+ MMA8652_CHANNEL(X, 0, 10),
+ MMA8652_CHANNEL(Y, 1, 10),
+ MMA8652_CHANNEL(Z, 2, 10),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+enum {
+ mma8452,
+ mma8453,
+ mma8652,
+ mma8653,
+};
+
+/*
+ * Hardware has fullscale of -2G, -4G, -8G corresponding to raw value -2048
+ * for 12 bit or -512 for 10 bit.
+ * The userspace interface uses m/s^2 and we declare micro units
+ * So scale factor is given by:
+ * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665
+ */
+
+static const struct mma_chip_info mma_chip_info_table[] = {
+ [mma8452] = {
+ .chip_id = MMA8452_DEVICE_ID,
+ .channels = mma8452_channels,
+ .num_channels = ARRAY_SIZE(mma8452_channels),
+ .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
+ .ev_cfg = MMA8452_TRANSIENT_CFG,
+ .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
+ .ev_cfg_chan_shift = 1,
+ .ev_src = MMA8452_TRANSIENT_SRC,
+ .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE,
+ .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE,
+ .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE,
+ .ev_ths = MMA8452_TRANSIENT_THS,
+ .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
+ .ev_count = MMA8452_TRANSIENT_COUNT,
+ },
+ [mma8453] = {
+ .chip_id = MMA8453_DEVICE_ID,
+ .channels = mma8453_channels,
+ .num_channels = ARRAY_SIZE(mma8452_channels),
+ .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
+ .ev_cfg = MMA8452_TRANSIENT_CFG,
+ .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
+ .ev_cfg_chan_shift = 1,
+ .ev_src = MMA8452_TRANSIENT_SRC,
+ .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE,
+ .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE,
+ .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE,
+ .ev_ths = MMA8452_TRANSIENT_THS,
+ .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
+ .ev_count = MMA8452_TRANSIENT_COUNT,
+ },
+ [mma8652] = {
+ .chip_id = MMA8652_DEVICE_ID,
+ .channels = mma8652_channels,
+ .num_channels = ARRAY_SIZE(mma8452_channels),
+ .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
+ .ev_cfg = MMA8452_FF_MT_CFG,
+ .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
+ .ev_cfg_chan_shift = 3,
+ .ev_src = MMA8452_FF_MT_SRC,
+ .ev_src_xe = MMA8452_FF_MT_SRC_XHE,
+ .ev_src_ye = MMA8452_FF_MT_SRC_YHE,
+ .ev_src_ze = MMA8452_FF_MT_SRC_ZHE,
+ .ev_ths = MMA8452_FF_MT_THS,
+ .ev_ths_mask = MMA8452_FF_MT_THS_MASK,
+ .ev_count = MMA8452_FF_MT_COUNT,
+ },
+ [mma8653] = {
+ .chip_id = MMA8653_DEVICE_ID,
+ .channels = mma8653_channels,
+ .num_channels = ARRAY_SIZE(mma8452_channels),
+ .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
+ .ev_cfg = MMA8452_FF_MT_CFG,
+ .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
+ .ev_cfg_chan_shift = 3,
+ .ev_src = MMA8452_FF_MT_SRC,
+ .ev_src_xe = MMA8452_FF_MT_SRC_XHE,
+ .ev_src_ye = MMA8452_FF_MT_SRC_YHE,
+ .ev_src_ze = MMA8452_FF_MT_SRC_ZHE,
+ .ev_ths = MMA8452_FF_MT_THS,
+ .ev_ths_mask = MMA8452_FF_MT_THS_MASK,
+ .ev_count = MMA8452_FF_MT_COUNT,
+ },
+};
+
static struct attribute *mma8452_attributes[] = {
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
@@ -813,19 +996,35 @@ static int mma8452_reset(struct i2c_client *client)
return -ETIMEDOUT;
}
+static const struct of_device_id mma8452_dt_ids[] = {
+ { .compatible = "fsl,mma8452", .data = &mma_chip_info_table[mma8452] },
+ { .compatible = "fsl,mma8453", .data = &mma_chip_info_table[mma8453] },
+ { .compatible = "fsl,mma8652", .data = &mma_chip_info_table[mma8652] },
+ { .compatible = "fsl,mma8653", .data = &mma_chip_info_table[mma8653] },
+ { }
+};
+
static int mma8452_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mma8452_data *data;
struct iio_dev *indio_dev;
int ret;
+ const struct of_device_id *match;
ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
if (ret < 0)
return ret;
- if (ret != MMA8452_DEVICE_ID)
+ if (ret != MMA8452_DEVICE_ID && ret != MMA8453_DEVICE_ID &&
+ ret != MMA8652_DEVICE_ID && ret != MMA8653_DEVICE_ID)
return -ENODEV;
+ match = of_match_device(mma8452_dt_ids, &client->dev);
+ if (!match) {
+ dev_err(&client->dev, "unknown device model\n");
+ return -ENODEV;
+ }
+
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
return -ENOMEM;
@@ -834,13 +1033,17 @@ static int mma8452_probe(struct i2c_client *client,
data->client = client;
mutex_init(&data->lock);
+ data->chip_info = match->data;
+ dev_info(&client->dev, "registering %s accelerometer, ID 0x%x\n",
+ match->compatible, data->chip_info->chip_id);
+
i2c_set_clientdata(client, indio_dev);
indio_dev->info = &mma8452_info;
- indio_dev->name = id->name;
+ indio_dev->name = DRIVER_NAME;
indio_dev->dev.parent = &client->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
- indio_dev->channels = mma8452_channels;
- indio_dev->num_channels = ARRAY_SIZE(mma8452_channels);
+ indio_dev->channels = data->chip_info->channels;
+ indio_dev->num_channels = data->chip_info->num_channels;
indio_dev->available_scan_masks = mma8452_scan_masks;
ret = mma8452_reset(client);
@@ -864,13 +1067,16 @@ static int mma8452_probe(struct i2c_client *client,
if (client->irq) {
/*
- * Although we enable the transient interrupt source once and
+ * Although we enable the interrupt sources once and
* for all here the transient event detection itself is not
* enabled until userspace asks for it by
* mma8452_write_event_config()
*/
- int supported_interrupts = MMA8452_INT_DRDY | MMA8452_INT_TRANS;
- int enabled_interrupts = MMA8452_INT_TRANS;
+ int supported_interrupts = MMA8452_INT_DRDY |
+ MMA8452_INT_TRANS |
+ MMA8452_INT_FF_MT;
+ int enabled_interrupts = MMA8452_INT_TRANS |
+ MMA8452_INT_FF_MT;
/* Assume wired to INT1 pin */
ret = i2c_smbus_write_byte_data(client,
@@ -959,19 +1165,17 @@ static SIMPLE_DEV_PM_OPS(mma8452_pm_ops, mma8452_suspend, mma8452_resume);
#endif
static const struct i2c_device_id mma8452_id[] = {
- { "mma8452", 0 },
+ { "mma8452", mma8452 },
+ { "mma8453", mma8453 },
+ { "mma8652", mma8652 },
+ { "mma8653", mma8653 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mma8452_id);
-static const struct of_device_id mma8452_dt_ids[] = {
- { .compatible = "fsl,mma8452" },
- { }
-};
-
static struct i2c_driver mma8452_driver = {
.driver = {
- .name = "mma8452",
+ .name = DRIVER_NAME,
.of_match_table = of_match_ptr(mma8452_dt_ids),
.pm = MMA8452_PM_OPS,
},
--
2.1.4
--
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