iio:gyro: introduce st_gyro_get_settings() function

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

Signed-off-by: Denis Ciocca <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/gyro/st_gyro.h

···
 	.drdy_int_pin = 2,
 };
 
+const struct st_sensor_settings *st_gyro_get_settings(const char *name);
 int st_gyro_common_probe(struct iio_dev *indio_dev);
 void st_gyro_common_remove(struct iio_dev *indio_dev);
 

drivers/iio/gyro/st_gyro_core.c

···
 #define ST_GYRO_TRIGGER_OPS NULL
 #endif
 
+/*
+ * st_gyro_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_gyro_get_settings(const char *name)
+{
+	int index = st_sensors_get_settings_index(name,
+					st_gyro_sensors_settings,
+					ARRAY_SIZE(st_gyro_sensors_settings));
+	if (index < 0)
+		return NULL;
+
+	return &st_gyro_sensors_settings[index];
+}
+EXPORT_SYMBOL(st_gyro_get_settings);
+
 int st_gyro_common_probe(struct iio_dev *indio_dev)
 {
 	struct st_sensor_data *gdata = iio_priv(indio_dev);