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iio: magnetometer: hmc5843: 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 18:02:53 +01:00 committed by Jonathan Cameron
parent d9842c770a
commit 8d7ea73814
2 changed files with 19 additions and 2 deletions
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1
drivers/iio/magnetometer/hmc5843.h
View File

@ -43,6 +43,7 @@ struct hmc5843_data {
struct mutex lock;
struct regmap *regmap;
const struct hmc5843_chip_info *variant;
struct iio_mount_matrix orientation;
__be16 buffer[8];
};

20
drivers/iio/magnetometer/hmc5843_core.c
View File

@ -237,6 +237,15 @@ int hmc5843_set_measurement_configuration(struct iio_dev *indio_dev,
return hmc5843_set_meas_conf(data, meas_conf);
}
static const struct iio_mount_matrix *
hmc5843_get_mount_matrix(const struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct hmc5843_data *data = iio_priv(indio_dev);
return &data->orientation;
}
static const struct iio_enum hmc5843_meas_conf_enum = {
.items = hmc5843_meas_conf_modes,
.num_items = ARRAY_SIZE(hmc5843_meas_conf_modes),
@ -247,7 +256,8 @@ static const struct iio_enum hmc5843_meas_conf_enum = {
static const struct iio_chan_spec_ext_info hmc5843_ext_info[] = {
IIO_ENUM("meas_conf", true, &hmc5843_meas_conf_enum),
IIO_ENUM_AVAILABLE("meas_conf", &hmc5843_meas_conf_enum),
{ },
IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, hmc5843_get_mount_matrix),
{ }
};
static const struct iio_enum hmc5983_meas_conf_enum = {
@ -260,7 +270,8 @@ static const struct iio_enum hmc5983_meas_conf_enum = {
static const struct iio_chan_spec_ext_info hmc5983_ext_info[] = {
IIO_ENUM("meas_conf", true, &hmc5983_meas_conf_enum),
IIO_ENUM_AVAILABLE("meas_conf", &hmc5983_meas_conf_enum),
{ },
IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, hmc5843_get_mount_matrix),
{ }
};
static
@ -635,6 +646,11 @@ int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
data->variant = &hmc5843_chip_info_tbl[id];
mutex_init(&data->lock);
ret = iio_read_mount_matrix(dev, "mount-matrix",
&data->orientation);
if (ret)
return ret;
indio_dev->dev.parent = dev;
indio_dev->name = name;
indio_dev->info = &hmc5843_info;