reset: add of_reset_control_get_by_index()

EXPORT_SYMBOL_GPL(reset_control_status);

/**

 * of_reset_control_get - Lookup and obtain a reference to a reset controller.

 * of_reset_control_get_by_index - Lookup and obtain a reference to a reset

 * controller by index.

 * @node: device to be reset by the controller

 * @id: reset line name

 *

 * Returns a struct reset_control or IS_ERR() condition containing errno.

 * @index: index of the reset controller

 *

 * Use of id names is optional.

 * This is to be used to perform a list of resets for a device or power domain

 * in whatever order. Returns a struct reset_control or IS_ERR() condition

 * containing errno.

 */

struct reset_control *of_reset_control_get(struct device_node *node,

					   const char *id)

struct reset_control *of_reset_control_get_by_index(struct device_node *node,

					   int index)

{

	struct reset_control *rstc = ERR_PTR(-EPROBE_DEFER);

	struct reset_controller_dev *r, *rcdev;

	struct of_phandle_args args;

	int index = 0;

	int rstc_id;

	int ret;

	if (id)

		index = of_property_match_string(node,

						 "reset-names", id);

	ret = of_parse_phandle_with_args(node, "resets", "#reset-cells",

					 index, &args);

	if (ret)

	return rstc;

}

EXPORT_SYMBOL_GPL(of_reset_control_get_by_index);

/**

 * of_reset_control_get - Lookup and obtain a reference to a reset controller.

 * @node: device to be reset by the controller

 * @id: reset line name

 *

 * Returns a struct reset_control or IS_ERR() condition containing errno.

 *

 * Use of id names is optional.

 */

struct reset_control *of_reset_control_get(struct device_node *node,

					   const char *id)

{

	int index = 0;

	if (id)

		index = of_property_match_string(node,

						 "reset-names", id);

	return of_reset_control_get_by_index(node, index);

}

EXPORT_SYMBOL_GPL(of_reset_control_get);

/**

struct reset_control *of_reset_control_get(struct device_node *node,

					   const char *id);

struct reset_control *of_reset_control_get_by_index(

					struct device_node *node, int index);

#else

static inline int reset_control_reset(struct reset_control *rstc)

	return ERR_PTR(-ENOSYS);

}

static inline struct reset_control *of_reset_control_get_by_index(

				struct device_node *node, int index)

{

	return ERR_PTR(-ENOTSUPP);

}

#endif /* CONFIG_RESET_CONTROLLER */

#endif