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iio: imu: st_lsm6dsx: add mount matrix support
Allow to read the mount-matrix device tree property and provide the mount_matrix file for userspace to read. Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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2 changed files with 23 additions and 0 deletions
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@ -76,6 +76,7 @@ enum st_lsm6dsx_hw_id {
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.endianness = IIO_LE, \
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}, \
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.event_spec = &st_lsm6dsx_event, \
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.ext_info = st_lsm6dsx_accel_ext_info, \
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.num_event_specs = 1, \
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}
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@ -378,6 +379,7 @@ struct st_lsm6dsx_sensor {
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* @enable_event: enabled event bitmask.
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* @iio_devs: Pointers to acc/gyro iio_dev instances.
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* @settings: Pointer to the specific sensor settings in use.
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* @orientation: sensor chip orientation relative to main hardware.
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*/
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struct st_lsm6dsx_hw {
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struct device *dev;
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@ -404,6 +406,8 @@ struct st_lsm6dsx_hw {
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struct iio_dev *iio_devs[ST_LSM6DSX_ID_MAX];
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const struct st_lsm6dsx_settings *settings;
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struct iio_mount_matrix orientation;
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};
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static __maybe_unused const struct iio_event_spec st_lsm6dsx_event = {
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@ -477,4 +481,19 @@ st_lsm6dsx_write_locked(struct st_lsm6dsx_hw *hw, unsigned int addr,
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return err;
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}
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static const inline struct iio_mount_matrix *
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st_lsm6dsx_get_mount_matrix(const struct iio_dev *iio_dev,
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const struct iio_chan_spec *chan)
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{
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struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
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struct st_lsm6dsx_hw *hw = sensor->hw;
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return &hw->orientation;
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}
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static const struct iio_chan_spec_ext_info st_lsm6dsx_accel_ext_info[] = {
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IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, st_lsm6dsx_get_mount_matrix),
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{ }
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};
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#endif /* ST_LSM6DSX_H */
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@ -2337,6 +2337,10 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
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return err;
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}
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err = iio_read_mount_matrix(hw->dev, "mount-matrix", &hw->orientation);
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if (err)
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return err;
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for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
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if (!hw->iio_devs[i])
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continue;
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