1#ifndef _LINUX_RESET_CONTROLLER_H_
2#define _LINUX_RESET_CONTROLLER_H_
3
4#include <linux/list.h>
5
6struct reset_controller_dev;
7
8/**
9 * struct reset_control_ops
10 *
11 * @reset: for self-deasserting resets, does all necessary
12 *         things to reset the device
13 * @assert: manually assert the reset line, if supported
14 * @deassert: manually deassert the reset line, if supported
15 * @status: return the status of the reset line, if supported
16 */
17struct reset_control_ops {
18	int (*reset)(struct reset_controller_dev *rcdev, unsigned long id);
19	int (*assert)(struct reset_controller_dev *rcdev, unsigned long id);
20	int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id);
21	int (*status)(struct reset_controller_dev *rcdev, unsigned long id);
22};
23
24struct module;
25struct device_node;
26struct of_phandle_args;
27
28/**
29 * struct reset_controller_dev - reset controller entity that might
30 *                               provide multiple reset controls
31 * @ops: a pointer to device specific struct reset_control_ops
32 * @owner: kernel module of the reset controller driver
33 * @list: internal list of reset controller devices
34 * @of_node: corresponding device tree node as phandle target
35 * @of_reset_n_cells: number of cells in reset line specifiers
36 * @of_xlate: translation function to translate from specifier as found in the
37 *            device tree to id as given to the reset control ops
38 * @nr_resets: number of reset controls in this reset controller device
39 */
40struct reset_controller_dev {
41	struct reset_control_ops *ops;
42	struct module *owner;
43	struct list_head list;
44	struct device_node *of_node;
45	int of_reset_n_cells;
46	int (*of_xlate)(struct reset_controller_dev *rcdev,
47			const struct of_phandle_args *reset_spec);
48	unsigned int nr_resets;
49};
50
51int reset_controller_register(struct reset_controller_dev *rcdev);
52void reset_controller_unregister(struct reset_controller_dev *rcdev);
53
54#endif
55