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Commit 3c35e20a authored by H. Nikolaus Schaller's avatar H. Nikolaus Schaller Committed by Jonathan Cameron
Browse files

iio: accel: 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: default avatarH. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent fb158971

drivers/iio/accel/bmc150-accel-core.c

+21 −0
Original line number Diff line number Diff line
@@ -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;