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iio: accel: bmc150: add mount matrix support

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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 18:02:48 +01:00 committed by Jonathan Cameron
parent fb1589710e
commit 3c35e20a11
1 changed files with 21 additions and 0 deletions
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21
drivers/iio/accel/bmc150-accel-core.c
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@ -204,6 +204,7 @@ struct bmc150_accel_data {
int ev_enable_state;
int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
const struct bmc150_accel_chip_info *chip_info;
struct iio_mount_matrix orientation;
};
static const struct {
@ -796,6 +797,20 @@ static ssize_t bmc150_accel_get_fifo_state(struct device *dev,
return sprintf(buf, "%d\n", state);
}
static const struct iio_mount_matrix *
bmc150_accel_get_mount_matrix(const struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct bmc150_accel_data *data = iio_priv(indio_dev);
return &data->orientation;
}
static const struct iio_chan_spec_ext_info bmc150_accel_ext_info[] = {
IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bmc150_accel_get_mount_matrix),
{ }
};
static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
static IIO_CONST_ATTR(hwfifo_watermark_max,
__stringify(BMC150_ACCEL_FIFO_LENGTH));
@ -978,6 +993,7 @@ static const struct iio_event_spec bmc150_accel_event = {
.shift = 16 - (bits), \
.endianness = IIO_LE, \
}, \
.ext_info = bmc150_accel_ext_info, \
.event_spec = &bmc150_accel_event, \
.num_event_specs = 1 \
}
@ -1555,6 +1571,11 @@ int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
data->regmap = regmap;
ret = iio_read_mount_matrix(dev, "mount-matrix",
&data->orientation);
if (ret)
return ret;
ret = bmc150_accel_chip_init(data);
if (ret < 0)
return ret;