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61fc4131 PZ |
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 | |
729de41b | 15 | * @status: return the status of the reset line, if supported |
61fc4131 PZ |
16 | */ |
17 | struct 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); | |
729de41b | 21 | int (*status)(struct reset_controller_dev *rcdev, unsigned long id); |
61fc4131 PZ |
22 | }; |
23 | ||
24 | struct module; | |
25 | struct device_node; | |
d0d44dd4 | 26 | struct of_phandle_args; |
61fc4131 PZ |
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 | */ | |
40 | struct 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 | ||
51 | int reset_controller_register(struct reset_controller_dev *rcdev); | |
52 | void reset_controller_unregister(struct reset_controller_dev *rcdev); | |
53 | ||
54 | #endif |