[PATCH v2 05/10] iio: gyro: bmg160: add mount matrix support

H. Nikolaus Schaller
2019-02-21T17:03:19Z

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>
---
drivers/iio/gyro/bmg160_core.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/drivers/iio/gyro/bmg160_core.c b/drivers/iio/gyro/bmg160_core.c
index 63ca31628a93..e7b38adee39a 100644
--- a/drivers/iio/gyro/bmg160_core.c
+++ b/drivers/iio/gyro/bmg160_core.c
@@ -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;
--
2.19.1