iio:magn: introduce st_magn_get_settings() function

The function is introduced to retrieve magn device settings. It will be
used by probe in order to configure regmap.

Signed-off-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/magnetometer/st_magn.h b/drivers/iio/magnetometer/st_magn.h
index d69ef9b..204b285 100644 (file)
--- a/drivers/iio/magnetometer/st_magn.h
+++ b/drivers/iio/magnetometer/st_magn.h
@@ -22,6 +22,7 @@
 #define LIS2MDL_MAGN_DEV_NAME          "lis2mdl"
 #define LSM9DS1_MAGN_DEV_NAME          "lsm9ds1_magn"
 
+const struct st_sensor_settings *st_magn_get_settings(const char *name);
 int st_magn_common_probe(struct iio_dev *indio_dev);
 void st_magn_common_remove(struct iio_dev *indio_dev);
 

diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
index 2f7a1db..43a49a5 100644 (file)
--- a/drivers/iio/magnetometer/st_magn_core.c
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -470,6 +470,24 @@ static const struct iio_trigger_ops st_magn_trigger_ops = {
 #define ST_MAGN_TRIGGER_OPS NULL
 #endif
 
+/*
+ * st_magn_get_settings() - get sensor settings from device name
+ * @name: device name buffer reference.
+ *
+ * Return: valid reference on success, NULL otherwise.
+ */
+const struct st_sensor_settings *st_magn_get_settings(const char *name)
+{
+       int index = st_sensors_get_settings_index(name,
+                                       st_magn_sensors_settings,
+                                       ARRAY_SIZE(st_magn_sensors_settings));
+       if (index < 0)
+               return NULL;
+
+       return &st_magn_sensors_settings[index];
+}
+EXPORT_SYMBOL(st_magn_get_settings);
+
 int st_magn_common_probe(struct iio_dev *indio_dev)
 {
        struct st_sensor_data *mdata = iio_priv(indio_dev);