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authorMatt Ranostay <mranostay@gmail.com>2016-09-23 23:04:07 -0700
committerJonathan Cameron <jic23@kernel.org>2016-09-27 20:33:02 +0100
commit0023e67dd8951737588b8af0469446df3ec52afe (patch)
tree2d7fdc82668d9964f2b406f7d604e6f37f361ded /drivers
parent2a20af722dde611b6b060af18dff651a8db96073 (diff)
downloadlinux-0023e67dd8951737588b8af0469446df3ec52afe.tar.bz2
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 <matt@ranostay.consulting> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/iio/inkern.c39
1 files changed, 26 insertions, 13 deletions
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index c4757e6367e7..29df11572858 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);