1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Reset driver for the StarFive JH7110 SoC
4 *
5 * Copyright (C) 2022 StarFive Technology Co., Ltd.
6 */
7
8#include <linux/auxiliary_bus.h>
9
10#include <soc/starfive/reset-starfive-jh71x0.h>
11
12#include "reset-starfive-jh71x0.h"
13
14#include <dt-bindings/reset/starfive,jh7110-crg.h>
15
16struct jh7110_reset_info {
17	unsigned int nr_resets;
18	unsigned int assert_offset;
19	unsigned int status_offset;
20};
21
22static const struct jh7110_reset_info jh7110_sys_info = {
23	.nr_resets = JH7110_SYSRST_END,
24	.assert_offset = 0x2F8,
25	.status_offset = 0x308,
26};
27
28static const struct jh7110_reset_info jh7110_aon_info = {
29	.nr_resets = JH7110_AONRST_END,
30	.assert_offset = 0x38,
31	.status_offset = 0x3C,
32};
33
34static const struct jh7110_reset_info jh7110_stg_info = {
35	.nr_resets = JH7110_STGRST_END,
36	.assert_offset = 0x74,
37	.status_offset = 0x78,
38};
39
40static const struct jh7110_reset_info jh7110_isp_info = {
41	.nr_resets = JH7110_ISPRST_END,
42	.assert_offset = 0x38,
43	.status_offset = 0x3C,
44};
45
46static const struct jh7110_reset_info jh7110_vout_info = {
47	.nr_resets = JH7110_VOUTRST_END,
48	.assert_offset = 0x48,
49	.status_offset = 0x4C,
50};
51
52static int jh7110_reset_probe(struct auxiliary_device *adev,
53			      const struct auxiliary_device_id *id)
54{
55	struct jh7110_reset_info *info = (struct jh7110_reset_info *)(id->driver_data);
56	struct jh71x0_reset_adev *rdev = to_jh71x0_reset_adev(adev);
57	void __iomem *base = rdev->base;
58
59	if (!info || !base)
60		return -ENODEV;
61
62	return reset_starfive_jh71x0_register(&adev->dev, adev->dev.parent->of_node,
63					      base + info->assert_offset,
64					      base + info->status_offset,
65					      NULL,
66					      info->nr_resets,
67					      NULL);
68}
69
70static const struct auxiliary_device_id jh7110_reset_ids[] = {
71	{
72		.name = "clk_starfive_jh7110_sys.rst-sys",
73		.driver_data = (kernel_ulong_t)&jh7110_sys_info,
74	},
75	{
76		.name = "clk_starfive_jh7110_sys.rst-aon",
77		.driver_data = (kernel_ulong_t)&jh7110_aon_info,
78	},
79	{
80		.name = "clk_starfive_jh7110_sys.rst-stg",
81		.driver_data = (kernel_ulong_t)&jh7110_stg_info,
82	},
83	{
84		.name = "clk_starfive_jh7110_sys.rst-isp",
85		.driver_data = (kernel_ulong_t)&jh7110_isp_info,
86	},
87	{
88		.name = "clk_starfive_jh7110_sys.rst-vo",
89		.driver_data = (kernel_ulong_t)&jh7110_vout_info,
90	},
91	{ /* sentinel */ }
92};
93MODULE_DEVICE_TABLE(auxiliary, jh7110_reset_ids);
94
95static struct auxiliary_driver jh7110_reset_driver = {
96	.probe		= jh7110_reset_probe,
97	.id_table	= jh7110_reset_ids,
98};
99module_auxiliary_driver(jh7110_reset_driver);
100
101MODULE_AUTHOR("Hal Feng <hal.feng@starfivetech.com>");
102MODULE_DESCRIPTION("StarFive JH7110 reset driver");
103MODULE_LICENSE("GPL");
104