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/accel/bma180.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c index cb9765a3de60..248be67e4f41 100644 --- a/drivers/iio/accel/bma180.c +++ b/drivers/iio/accel/bma180.c @@ -116,6 +116,7 @@ struct bma180_data { struct i2c_client *client; struct iio_trigger *trig; const struct bma180_part_info *part_info; + struct iio_mount_matrix orientation; struct mutex mutex; bool sleep_state; int scale; @@ -561,6 +562,13 @@ static int bma180_set_power_mode(struct iio_dev *indio_dev, return ret; } +static const struct iio_mount_matrix * +bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + return &((struct bma180_data *)iio_priv(indio_dev))->orientation; +} + static const struct iio_enum bma180_power_mode_enum = { .items = bma180_power_modes, .num_items = ARRAY_SIZE(bma180_power_modes), @@ -571,6 +579,7 @@ static const struct iio_enum bma180_power_mode_enum = { static const struct iio_chan_spec_ext_info bma180_ext_info[] = { IIO_ENUM("power_mode", true, &bma180_power_mode_enum), IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum), + IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix), { }, }; @@ -722,6 +731,11 @@ static int bma180_probe(struct i2c_client *client, chip = id->driver_data; data->part_info = &bma180_part_info[chip]; + ret = of_iio_read_mount_matrix(&client->dev, "mount-matrix", + &data->orientation); + if (ret) + return ret; + ret = data->part_info->chip_config(data); if (ret < 0) goto err_chip_disable; -- 2.19.1
