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iio: gyro: bmg160: 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: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
H. Nikolaus Schaller 2019-02-21 18:02:50 +01:00 committed by Jonathan Cameron
parent 587c2bea23
commit 3a6049f6db
1 changed files with 21 additions and 0 deletions
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21
drivers/iio/gyro/bmg160_core.c
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@ -102,6 +102,7 @@ struct bmg160_data {
struct regmap *regmap;
struct iio_trigger *dready_trig;
struct iio_trigger *motion_trig;
struct iio_mount_matrix orientation;
struct mutex mutex;
s16 buffer[8];
u32 dps_range;
@ -794,6 +795,20 @@ static int bmg160_write_event_config(struct iio_dev *indio_dev,
return 0;
}
static const struct iio_mount_matrix *
bmg160_get_mount_matrix(const struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct bmg160_data *data = iio_priv(indio_dev);
return &data->orientation;
}
static const struct iio_chan_spec_ext_info bmg160_ext_info[] = {
IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bmg160_get_mount_matrix),
{ }
};
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("100 200 400 1000 2000");
static IIO_CONST_ATTR(in_anglvel_scale_available,
@ -831,6 +846,7 @@ static const struct iio_event_spec bmg160_event = {
.storagebits = 16, \
.endianness = IIO_LE, \
}, \
.ext_info = bmg160_ext_info, \
.event_spec = &bmg160_event, \
.num_event_specs = 1 \
}
@ -1075,6 +1091,11 @@ int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
data->irq = irq;
data->regmap = regmap;
ret = iio_read_mount_matrix(dev, "mount-matrix",
&data->orientation);
if (ret)
return ret;
ret = bmg160_chip_init(data);
if (ret < 0)
return ret;