iio: st-sensors: add support for single full scale device

gbarba-stm · jic23 · commit bb602f8c61e2 · 2015-07-23T20:43:10.000+01:00
Some sensors could have only one full scale value. This means that the
sensor hasn't a full scale register. This commit add a check on the
configured full scale address to support such kind of sensors.

Signed-off-by: Giuseppe Barba &lt;giuseppe.barba@st.com&gt;
Acked-by: Denis Ciocca &lt;denis.ciocca@st.com&gt;
Signed-off-by: Jonathan Cameron &lt;jic23@kernel.org&gt;
diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
@@ -126,6 +126,9 @@ static int st_sensors_set_fullscale(struct iio_dev *indio_dev, unsigned int fs)
 	int err, i = 0;
 	struct st_sensor_data *sdata = iio_priv(indio_dev);
 
+	if (sdata->sensor_settings->fs.addr == 0)
+		return 0;
+
 	err = st_sensors_match_fs(sdata->sensor_settings, fs, &i);
 	if (err < 0)
 		goto st_accel_set_fullscale_error;
