1 #ifndef _LINUX_RESET_CONTROLLER_H_
2 #define _LINUX_RESET_CONTROLLER_H_
3 
4 #include <linux/list.h>
5 
6 struct 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  */
16 struct 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 
22 struct module;
23 struct 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  */
37 struct 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 
48 int reset_controller_register(struct reset_controller_dev *rcdev);
49 void reset_controller_unregister(struct reset_controller_dev *rcdev);
50 
51 #endif
52