Add support for the standard "mount-matrix" device property to
the mma8452 driver.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
Note this applies on top of the following recent patch from me:
"iio: mma8452: Fix probe failing when an i2c_device_id is used"
---
drivers/iio/accel/mma8452.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index c82841c0a7b3..c03f65a061c8 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -104,6 +104,7 @@
struct mma8452_data {
struct i2c_client *client;
struct mutex lock;
+ struct iio_mount_matrix orientation;
u8 ctrl_reg1;
u8 data_cfg;
const struct mma_chip_info *chip_info;
@@ -1189,6 +1190,20 @@ static const struct attribute_group mma8452_event_attribute_group = {
.attrs = mma8452_event_attributes,
};
+static const struct iio_mount_matrix *
+mma8452_get_mount_matrix(const struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct mma8452_data *data = iio_priv(indio_dev);
+
+ return &data->orientation;
+}
+
+static const struct iio_chan_spec_ext_info mma8452_ext_info[] = {
+ IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE, mma8452_get_mount_matrix),
+ { }
+};
+
#define MMA8452_FREEFALL_CHANNEL(modifier) { \
.type = IIO_ACCEL, \
.modified = 1, \
@@ -1227,6 +1242,7 @@ static const struct attribute_group mma8452_event_attribute_group = {
}, \
.event_spec = mma8452_transient_event, \
.num_event_specs = ARRAY_SIZE(mma8452_transient_event), \
+ .ext_info = mma8452_ext_info, \
}
#define MMA8652_CHANNEL(axis, idx, bits) { \
@@ -1248,6 +1264,7 @@ static const struct attribute_group mma8452_event_attribute_group = {
}, \
.event_spec = mma8452_motion_event, \
.num_event_specs = ARRAY_SIZE(mma8452_motion_event), \
+ .ext_info = mma8452_ext_info, \
}
static const struct iio_chan_spec mma8451_channels[] = {
@@ -1546,6 +1563,10 @@ static int mma8452_probe(struct i2c_client *client,
data->chip_info = match->data;
}
+ ret = iio_read_mount_matrix(&client->dev, &data->orientation);
+ if (ret)
+ return ret;
+
data->vdd_reg = devm_regulator_get(&client->dev, "vdd");
if (IS_ERR(data->vdd_reg))
return dev_err_probe(&client->dev, PTR_ERR(data->vdd_reg),
--
2.33.1
