1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2021 BAIKAL ELECTRONICS, JSC
4 *
5 * Baikal-T1 CCU Resets interface driver
6 */
7#ifndef __CLK_BT1_CCU_RST_H__
8#define __CLK_BT1_CCU_RST_H__
9
10#include <linux/of.h>
11#include <linux/regmap.h>
12#include <linux/reset-controller.h>
13
14struct ccu_rst_info;
15
16/*
17 * enum ccu_rst_type - CCU Reset types
18 * @CCU_RST_TRIG: Self-deasserted reset signal.
19 * @CCU_RST_DIR: Directly controlled reset signal.
20 */
21enum ccu_rst_type {
22	CCU_RST_TRIG,
23	CCU_RST_DIR,
24};
25
26/*
27 * struct ccu_rst_init_data - CCU Resets initialization data
28 * @sys_regs: Baikal-T1 System Controller registers map.
29 * @np: Pointer to the node with the System CCU block.
30 */
31struct ccu_rst_init_data {
32	struct regmap *sys_regs;
33	struct device_node *np;
34};
35
36/*
37 * struct ccu_rst - CCU Reset descriptor
38 * @rcdev: Reset controller descriptor.
39 * @sys_regs: Baikal-T1 System Controller registers map.
40 * @rsts_info: Reset flag info (base address and mask).
41 */
42struct ccu_rst {
43	struct reset_controller_dev rcdev;
44	struct regmap *sys_regs;
45	const struct ccu_rst_info *rsts_info;
46};
47#define to_ccu_rst(_rcdev) container_of(_rcdev, struct ccu_rst, rcdev)
48
49#ifdef CONFIG_CLK_BT1_CCU_RST
50
51struct ccu_rst *ccu_rst_hw_register(const struct ccu_rst_init_data *init);
52
53void ccu_rst_hw_unregister(struct ccu_rst *rst);
54
55#else
56
57static inline
58struct ccu_rst *ccu_rst_hw_register(const struct ccu_rst_init_data *init)
59{
60	return NULL;
61}
62
63static inline void ccu_rst_hw_unregister(struct ccu_rst *rst) {}
64
65#endif
66
67#endif /* __CLK_BT1_CCU_RST_H__ */
68