@@ -17,6 +17,8 @@
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/trigger_consumer.h>
+#include "acpi-helpers.h"
+
#define MXC4005_DRV_NAME "mxc4005"
#define MXC4005_IRQ_NAME "mxc4005_event"
#define MXC4005_REGMAP_NAME "mxc4005_regmap"
@@ -65,6 +67,7 @@ struct mxc4005_data {
struct mutex mutex;
struct regmap *regmap;
struct iio_trigger *dready_trig;
+ struct iio_mount_matrix orientation;
/* Ensure timestamp is naturally aligned */
struct {
__be16 chans[3];
@@ -272,6 +275,20 @@ static int mxc4005_write_raw(struct iio_dev *indio_dev,
}
}
+static const struct iio_mount_matrix *
+mxc4005_get_mount_matrix(const struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct mxc4005_data *data = iio_priv(indio_dev);
+
+ return &data->orientation;
+}
+
+static const struct iio_chan_spec_ext_info mxc4005_ext_info[] = {
+ IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE, mxc4005_get_mount_matrix),
+ { }
+};
+
static const struct iio_info mxc4005_info = {
.read_raw = mxc4005_read_raw,
.write_raw = mxc4005_write_raw,
@@ -298,6 +315,7 @@ static const unsigned long mxc4005_scan_masks[] = {
.shift = 4, \
.endianness = IIO_BE, \
}, \
+ .ext_info = mxc4005_ext_info, \
}
static const struct iio_chan_spec mxc4005_channels[] = {
@@ -440,6 +458,12 @@ static int mxc4005_probe(struct i2c_client *client)
mutex_init(&data->mutex);
+ if (!acpi_read_mount_matrix(&client->dev, &data->orientation, "ROTM")) {
+ ret = iio_read_mount_matrix(&client->dev, &data->orientation);
+ if (ret)
+ return ret;
+ }
+
indio_dev->channels = mxc4005_channels;
indio_dev->num_channels = ARRAY_SIZE(mxc4005_channels);
indio_dev->available_scan_masks = mxc4005_scan_masks;
Some devices use the semi-standard ACPI "ROTM" method to store the accelerometers orientation matrix. Add support for this using the new acpi_read_mount_matrix() helper, if the helper fails to read the matrix fall back to iio_read_mount_matrix() which will try to get it from device-properties (devicetree) and if that fails it will fill the matrix with the identity matrix. Link: https://bugzilla.kernel.org/show_bug.cgi?id=218578 Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- drivers/iio/accel/mxc4005.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)