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iio: accel: bma180: 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 18:02:49 +01:00 committed by Jonathan Cameron
parent 3c35e20a11
commit 587c2bea23
1 changed files with 17 additions and 1 deletions
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18
drivers/iio/accel/bma180.c
View File

@ -116,6 +116,7 @@ struct bma180_data {
struct i2c_client *client;
struct iio_trigger *trig;
const struct bma180_part_info *part_info;
struct iio_mount_matrix orientation;
struct mutex mutex;
bool sleep_state;
int scale;
@ -561,6 +562,15 @@ static int bma180_set_power_mode(struct iio_dev *indio_dev,
return ret;
}
static const struct iio_mount_matrix *
bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct bma180_data *data = iio_priv(indio_dev);
return &data->orientation;
}
static const struct iio_enum bma180_power_mode_enum = {
.items = bma180_power_modes,
.num_items = ARRAY_SIZE(bma180_power_modes),
@ -571,7 +581,8 @@ static const struct iio_enum bma180_power_mode_enum = {
static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
{ },
IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
{ }
};
#define BMA180_ACC_CHANNEL(_axis, _bits) { \
@ -722,6 +733,11 @@ static int bma180_probe(struct i2c_client *client,
chip = id->driver_data;
data->part_info = &bma180_part_info[chip];
ret = iio_read_mount_matrix(&client->dev, "mount-matrix",
&data->orientation);
if (ret)
return ret;
ret = data->part_info->chip_config(data);
if (ret < 0)
goto err_chip_disable;