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iio: gyro: itg3200: add mount matrix support 

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 <hns@goldelico.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
H. Nikolaus Schaller 2019-02-21 18:02:51 +01:00 committed by Jonathan Cameron
parent 3a6049f6db
commit 70b5fdbb2e
2 changed files with 21 additions and 0 deletions
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20
drivers/iio/gyro/itg3200_core.c
View File

@ -242,6 +242,20 @@ err_ret:
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 @@ err_ret:
.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;

1
include/linux/iio/gyro/itg3200.h
View File

@ -104,6 +104,7 @@
struct itg3200 {
struct i2c_client *i2c;
struct iio_trigger *trig;
struct iio_mount_matrix orientation;
};
enum ITG3200_SCAN_INDEX {