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iio: magnetometer: bmc150: 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>
hifive-unleashed-5.2
H. Nikolaus Schaller 2019-02-21 18:02:52 +01:00 committed by Jonathan Cameron
parent 70b5fdbb2e
commit d9842c770a
1 changed files with 21 additions and 0 deletions
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21
drivers/iio/magnetometer/bmc150_magn.c
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@ -143,6 +143,7 @@ struct bmc150_magn_data {
*/
struct mutex mutex;
struct regmap *regmap;
struct iio_mount_matrix orientation;
/* 4 x 32 bits for x, y z, 4 bytes align, 64 bits timestamp */
s32 buffer[6];
struct iio_trigger *dready_trig;
@ -612,6 +613,20 @@ static ssize_t bmc150_magn_show_samp_freq_avail(struct device *dev,
return len;
}
static const struct iio_mount_matrix *
bmc150_magn_get_mount_matrix(const struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct bmc150_magn_data *data = iio_priv(indio_dev);
return &data->orientation;
}
static const struct iio_chan_spec_ext_info bmc150_magn_ext_info[] = {
IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bmc150_magn_get_mount_matrix),
{ }
};
static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(bmc150_magn_show_samp_freq_avail);
static struct attribute *bmc150_magn_attributes[] = {
@ -638,6 +653,7 @@ static const struct attribute_group bmc150_magn_attrs_group = {
.storagebits = 32, \
.endianness = IIO_LE \
}, \
.ext_info = bmc150_magn_ext_info, \
}
static const struct iio_chan_spec bmc150_magn_channels[] = {
@ -861,6 +877,11 @@ int bmc150_magn_probe(struct device *dev, struct regmap *regmap,
data->irq = irq;
data->dev = dev;
ret = iio_read_mount_matrix(dev, "mount-matrix",
&data->orientation);
if (ret)
return ret;
if (!name && ACPI_HANDLE(dev))
name = bmc150_magn_match_acpi_device(dev);