iio: sensors-core: st: Allow full-scale to be an optional feature

Some chips either don't support it or fail to provide adequate documentation,
so sometimes it's impossible to enable the feature even if it is supported.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
index ceebd3c27892..16cfbc530769 100644
--- a/drivers/iio/pressure/st_pressure_core.c
+++ b/drivers/iio/pressure/st_pressure_core.c
@@ -226,8 +226,10 @@ int st_press_common_probe(struct iio_dev *indio_dev,
         indio_dev->channels = pdata->sensor->ch;
         indio_dev->num_channels = ARRAY_SIZE(st_press_channels);
 
-        pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
-                                                &pdata->sensor->fs.fs_avl[0];
+        if (pdata->sensor->fs.addr != 0)
+                pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
+                        &pdata->sensor->fs.fs_avl[0];
+
         pdata->odr = pdata->sensor->odr.odr_avl[0].hz;
 
         if (!plat_data)