Commit f9380e71 authored by Dmitry Eremin-Solenikov's avatar Dmitry Eremin-Solenikov Committed by Jonathan Cameron
Browse files

iio: inkern: add iio_write_channel_raw 



Introduce API for easy in-kernel setting of DAC values.

Signed-off-by: default avatarDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent c75b8dc8

drivers/iio/inkern.c

+25 −0
Original line number Diff line number Diff line
@@ -631,3 +631,28 @@ int iio_get_channel_type(struct iio_channel *chan, enum iio_chan_type *type) 
	return ret;

}

EXPORT_SYMBOL_GPL(iio_get_channel_type);



static int iio_channel_write(struct iio_channel *chan, int val, int val2,

			     enum iio_chan_info_enum info)

{

	return chan->indio_dev->info->write_raw(chan->indio_dev,

						chan->channel, val, val2, info);

}



int iio_write_channel_raw(struct iio_channel *chan, int val)

{

	int ret;



	mutex_lock(&chan->indio_dev->info_exist_lock);

	if (chan->indio_dev->info == NULL) {

		ret = -ENODEV;

		goto err_unlock;

	}



	ret = iio_channel_write(chan, val, 0, IIO_CHAN_INFO_RAW);

err_unlock:

	mutex_unlock(&chan->indio_dev->info_exist_lock);



	return ret;

}

EXPORT_SYMBOL_GPL(iio_write_channel_raw);

include/linux/iio/consumer.h

+10 −0
Original line number Diff line number Diff line
@@ -150,6 +150,16 @@ int iio_read_channel_average_raw(struct iio_channel *chan, int *val); 
 */

int iio_read_channel_processed(struct iio_channel *chan, int *val);



/**

 * iio_write_channel_raw() - write to a given channel

 * @chan:		The channel being queried.

 * @val:		Value being written.

 *

 * Note raw writes to iio channels are in dac counts and hence

 * scale will need to be applied if standard units required.

 */

int iio_write_channel_raw(struct iio_channel *chan, int val);



/**

 * iio_get_channel_type() - get the type of a channel

 * @channel:		The channel being queried.