From 0023e67dd8951737588b8af0469446df3ec52afe Mon Sep 17 00:00:00 2001 From: Matt Ranostay Date: Fri, 23 Sep 2016 23:04:07 -0700 Subject: iio: inkern: add iio_read_channel_offset helper Allow access to underlying channel IIO_CHAN_INFO_OFFSET from a consumer. Signed-off-by: Matt Ranostay Signed-off-by: Jonathan Cameron --- drivers/iio/inkern.c | 39 ++++++++++++++++++++++++++------------- 1 file changed, 26 insertions(+), 13 deletions(-) (limited to 'drivers/iio/inkern.c') diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index c4757e6..29df115 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -658,6 +658,31 @@ err_unlock: } EXPORT_SYMBOL_GPL(iio_convert_raw_to_processed); +static int iio_read_channel_attribute(struct iio_channel *chan, + int *val, int *val2, + enum iio_chan_info_enum attribute) +{ + int ret; + + mutex_lock(&chan->indio_dev->info_exist_lock); + if (chan->indio_dev->info == NULL) { + ret = -ENODEV; + goto err_unlock; + } + + ret = iio_channel_read(chan, val, val2, attribute); +err_unlock: + mutex_unlock(&chan->indio_dev->info_exist_lock); + + return ret; +} + +int iio_read_channel_offset(struct iio_channel *chan, int *val, int *val2) +{ + return iio_read_channel_attribute(chan, val, val2, IIO_CHAN_INFO_OFFSET); +} +EXPORT_SYMBOL_GPL(iio_read_channel_offset); + int iio_read_channel_processed(struct iio_channel *chan, int *val) { int ret; @@ -687,19 +712,7 @@ EXPORT_SYMBOL_GPL(iio_read_channel_processed); int iio_read_channel_scale(struct iio_channel *chan, int *val, int *val2) { - int ret; - - mutex_lock(&chan->indio_dev->info_exist_lock); - if (chan->indio_dev->info == NULL) { - ret = -ENODEV; - goto err_unlock; - } - - ret = iio_channel_read(chan, val, val2, IIO_CHAN_INFO_SCALE); -err_unlock: - mutex_unlock(&chan->indio_dev->info_exist_lock); - - return ret; + return iio_read_channel_attribute(chan, val, val2, IIO_CHAN_INFO_SCALE); } EXPORT_SYMBOL_GPL(iio_read_channel_scale); -- cgit v1.1