1 #ifndef _LINUX_RESET_CONTROLLER_H_
2 #define _LINUX_RESET_CONTROLLER_H_
4 #include <linux/list.h>
6 struct reset_controller_dev;
9 * struct reset_control_ops
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
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);
21 int (*status)(struct reset_controller_dev *rcdev, unsigned long id);
26 struct of_phandle_args;
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 * @reset_control_head: head of internal list of requested reset controls
35 * @of_node: corresponding device tree node as phandle target
36 * @of_reset_n_cells: number of cells in reset line specifiers
37 * @of_xlate: translation function to translate from specifier as found in the
38 * device tree to id as given to the reset control ops
39 * @nr_resets: number of reset controls in this reset controller device
41 struct reset_controller_dev {
42 const struct reset_control_ops *ops;
44 struct list_head list;
45 struct list_head reset_control_head;
46 struct device_node *of_node;
48 int (*of_xlate)(struct reset_controller_dev *rcdev,
49 const struct of_phandle_args *reset_spec);
50 unsigned int nr_resets;
53 int reset_controller_register(struct reset_controller_dev *rcdev);
54 void reset_controller_unregister(struct reset_controller_dev *rcdev);
57 int devm_reset_controller_register(struct device *dev,
58 struct reset_controller_dev *rcdev);