iio: amplifiers: ad8366: Add write_raw_get_fmt function

This patch add write_raw_get_fmt function to specify conversion for
hardware gain.

Signed-off-by: Beniamin Bia <beniamin.bia@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c
index 0176d3d8cc9cc40314f1dd326e3e13adade46d74..95972ab60f42e6ce6d30a79cc1f45813bbba6fbb 100644 (file)
--- a/drivers/iio/amplifiers/ad8366.c
+++ b/drivers/iio/amplifiers/ad8366.c
@@ -180,9 +180,22 @@ static int ad8366_write_raw(struct iio_dev *indio_dev,
        return ret;
 }
 
+static int ad8366_write_raw_get_fmt(struct iio_dev *indio_dev,
+                                   struct iio_chan_spec const *chan,
+                                   long mask)
+{
+       switch (mask) {
+       case IIO_CHAN_INFO_HARDWAREGAIN:
+               return IIO_VAL_INT_PLUS_MICRO_DB;
+       default:
+               return -EINVAL;
+       }
+}
+
 static const struct iio_info ad8366_info = {
        .read_raw = &ad8366_read_raw,
        .write_raw = &ad8366_write_raw,
+       .write_raw_get_fmt = &ad8366_write_raw_get_fmt,
 };
 
 #define AD8366_CHAN(_channel) {                                \