On Sun, 2020-01-12 at 23:33 +0300, Dmitry Osipenko wrote:
> Hardware could be physically mounted in any possible direction and
> userpspace needs to be aware of the mounting orientation in order to
> process sensor's data correctly. In particular this helps iio-sensor-
> proxy
> to report display's orientation properly on a phone/tablet devices.
>
> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
> ---
> drivers/iio/accel/kxcjk-1013.c | 27 +++++++++++++++++++++++++-
> -
> include/linux/iio/accel/kxcjk_1013.h | 3 +++
> 2 files changed, 28 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iio/accel/kxcjk-1013.c
> b/drivers/iio/accel/kxcjk-1013.c
> index fee535d6e45b..c9924a65c32a 100644
> --- a/drivers/iio/accel/kxcjk-1013.c
> +++ b/drivers/iio/accel/kxcjk-1013.c
> @@ -130,6 +130,7 @@ struct kxcjk1013_data {
> struct i2c_client *client;
> struct iio_trigger *dready_trig;
> struct iio_trigger *motion_trig;
> + struct iio_mount_matrix orientation;
> struct mutex mutex;
> s16 buffer[8];
> u8 odr_bits;
> @@ -983,6 +984,20 @@ static const struct iio_event_spec
> kxcjk1013_event = {
> BIT(IIO_EV_INFO_PERIOD)
> };
>
> +static const struct iio_mount_matrix *
> +kxcjk1013_get_mount_matrix(const struct iio_dev *indio_dev,
> + const struct iio_chan_spec *chan)
> +{
> + struct kxcjk1013_data *data = iio_priv(indio_dev);
> +
> + return &data->orientation;
> +}
> +
> +static const struct iio_chan_spec_ext_info kxcjk1013_ext_info[] = {
> + IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE,
> kxcjk1013_get_mount_matrix),
> + { }
> +};
> +
> #define KXCJK1013_CHANNEL(_axis) {
> \
> .type = IIO_ACCEL,
> \
> .modified = 1,
> \
> @@ -999,6 +1014,7 @@ static const struct iio_event_spec
> kxcjk1013_event = {
> .endianness = IIO_LE,
> \
> },
> \
> .event_spec = &kxcjk1013_event, \
> + .ext_info = kxcjk1013_ext_info,
> \
> .num_event_specs = 1
> \
> }
>
> @@ -1267,11 +1283,18 @@ static int kxcjk1013_probe(struct i2c_client
> *client,
> data->client = client;
>
> pdata = dev_get_platdata(&client->dev);
> - if (pdata)
> + if (pdata) {
> data->active_high_intr = pdata->active_high_intr;
> - else
> + data->orientation = pdata->orientation;
> + } else {
> data->active_high_intr = true; /* default polarity */
>
> + ret = iio_read_mount_matrix(&client->dev, "mount-
> matrix",
> + &data->orientation);
> + if (ret)
> + return ret;
> + }
> +
> if (id) {
> data->chipset = (enum kx_chipset)(id->driver_data);
> name = id->name;
> diff --git a/include/linux/iio/accel/kxcjk_1013.h
> b/include/linux/iio/accel/kxcjk_1013.h
> index 8c3c78bc9f91..ea0ecb774371 100644
> --- a/include/linux/iio/accel/kxcjk_1013.h
> +++ b/include/linux/iio/accel/kxcjk_1013.h
> @@ -7,8 +7,11 @@
> #ifndef __IIO_KXCJK_1013_H__
> #define __IIO_KXCJK_1013_H__
>
> +#include <linux/iio/iio.h>
> +
> struct kxcjk_1013_platform_data {
> bool active_high_intr;
> + struct iio_mount_matrix orientation;
> };
>
> #endif
