This patch allows to read a mount-matrix device tree property and report to user-space or in-kernel iio clients.
Signed-off-by: H. Nikolaus Schaller <[email protected]> --- drivers/iio/gyro/itg3200_core.c | 20 ++++++++++++++++++++ include/linux/iio/gyro/itg3200.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/iio/gyro/itg3200_core.c b/drivers/iio/gyro/itg3200_core.c index 7adecb562c81..203a6be33b70 100644 --- a/drivers/iio/gyro/itg3200_core.c +++ b/drivers/iio/gyro/itg3200_core.c @@ -242,6 +242,20 @@ static int itg3200_initial_setup(struct iio_dev *indio_dev) return ret; } +static const struct iio_mount_matrix * +itg3200_get_mount_matrix(const struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct itg3200 *data = iio_priv(indio_dev); + + return &data->orientation; +} + +static const struct iio_chan_spec_ext_info itg3200_ext_info[] = { + IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, itg3200_get_mount_matrix), + { } +}; + #define ITG3200_ST \ { .sign = 's', .realbits = 16, .storagebits = 16, .endianness = IIO_BE } @@ -255,6 +269,7 @@ static int itg3200_initial_setup(struct iio_dev *indio_dev) .address = ITG3200_REG_GYRO_ ## _mod ## OUT_H, \ .scan_index = ITG3200_SCAN_GYRO_ ## _mod, \ .scan_type = ITG3200_ST, \ + .ext_info = itg3200_ext_info, \ } static const struct iio_chan_spec itg3200_channels[] = { @@ -297,6 +312,11 @@ static int itg3200_probe(struct i2c_client *client, st = iio_priv(indio_dev); + ret = iio_read_mount_matrix(&client->dev, "mount-matrix", + &st->orientation); + if (ret) + return ret; + i2c_set_clientdata(client, indio_dev); st->i2c = client; diff --git a/include/linux/iio/gyro/itg3200.h b/include/linux/iio/gyro/itg3200.h index 2a820850f284..0a30fddccfb3 100644 --- a/include/linux/iio/gyro/itg3200.h +++ b/include/linux/iio/gyro/itg3200.h @@ -104,6 +104,7 @@ struct itg3200 { struct i2c_client *i2c; struct iio_trigger *trig; + struct iio_mount_matrix orientation; }; enum ITG3200_SCAN_INDEX { -- 2.19.1
