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Philipp Zabel61fc4132012-11-19 17:23:13 +01001#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 */
16struct reset_control_ops {
17 int (*reset)(struct reset_controller_dev *rcdev, unsigned long id);
18 int (*assert)(struct reset_controller_dev *rcdev, unsigned long id);
19 int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id);
20};
21
22struct module;
23struct device_node;
24
25/**
26 * struct reset_controller_dev - reset controller entity that might
27 * provide multiple reset controls
28 * @ops: a pointer to device specific struct reset_control_ops
29 * @owner: kernel module of the reset controller driver
30 * @list: internal list of reset controller devices
31 * @of_node: corresponding device tree node as phandle target
32 * @of_reset_n_cells: number of cells in reset line specifiers
33 * @of_xlate: translation function to translate from specifier as found in the
34 * device tree to id as given to the reset control ops
35 * @nr_resets: number of reset controls in this reset controller device
36 */
37struct reset_controller_dev {
38 struct reset_control_ops *ops;
39 struct module *owner;
40 struct list_head list;
41 struct device_node *of_node;
42 int of_reset_n_cells;
43 int (*of_xlate)(struct reset_controller_dev *rcdev,
44 const struct of_phandle_args *reset_spec);
45 unsigned int nr_resets;
46};
47
48int reset_controller_register(struct reset_controller_dev *rcdev);
49void reset_controller_unregister(struct reset_controller_dev *rcdev);
50
51#endif