iio: imu: adis: create an unlocked version of adis_reset()

The reset routine may also be important to be protected by the state-lock
and grouped with other operations, so create an unlocked version, so that
this can be done.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/adis.c

@@ -309,23 +309,23 @@ int __adis_check_status(struct adis *adis)
 EXPORT_SYMBOL_GPL(__adis_check_status);
 
 /**
- * adis_reset() - Reset the device
+ * __adis_reset() - Reset the device (unlocked version)
  * @adis: The adis device
  *
  * Returns 0 on success, a negative error code otherwise
  */
-int adis_reset(struct adis *adis)
+int __adis_reset(struct adis *adis)
 {
 	int ret;
 
-	ret = adis_write_reg_8(adis, adis->data->glob_cmd_reg,
+	ret = __adis_write_reg_8(adis, adis->data->glob_cmd_reg,
 			ADIS_GLOB_CMD_SW_RESET);
 	if (ret)
 		dev_err(&adis->spi->dev, "Failed to reset device: %d\n", ret);
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(adis_reset);
+EXPORT_SYMBOL_GPL(__adis_reset);
 
 static int adis_self_test(struct adis *adis)
 {

include/linux/iio/imu/adis.h

@@ -73,7 +73,24 @@ struct adis {
 
 int adis_init(struct adis *adis, struct iio_dev *indio_dev,
 	struct spi_device *spi, const struct adis_data *data);
-int adis_reset(struct adis *adis);
+int __adis_reset(struct adis *adis);
+
+/**
+ * adis_reset() - Reset the device
+ * @adis: The adis device
+ *
+ * Returns 0 on success, a negative error code otherwise
+ */
+static inline int adis_reset(struct adis *adis)
+{
+	int ret;
+
+	mutex_lock(&adis->state_lock);
+	ret = __adis_reset(adis);
+	mutex_unlock(&adis->state_lock);
+
+	return ret;
+}
 
 int __adis_write_reg(struct adis *adis, unsigned int reg,
 	unsigned int val, unsigned int size);