reset-meson-aux.c

 1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 2/*
 3 * Amlogic Meson Reset Auxiliary driver
 4 *
 5 * Copyright (c) 2024 BayLibre, SAS.
 6 * Author: Jerome Brunet <jbrunet@baylibre.com>
 7 */
 8
 9#include <linux/err.h>
10#include <linux/module.h>
11#include <linux/auxiliary_bus.h>
12#include <linux/regmap.h>
13#include <linux/reset-controller.h>
14
15#include "reset-meson.h"
16
17static const struct meson_reset_param meson_a1_audio_param = {
18	.reset_ops	= &meson_reset_toggle_ops,
19	.reset_num	= 32,
20	.level_offset	= 0x28,
21};
22
23static const struct meson_reset_param meson_a1_audio_vad_param = {
24	.reset_ops	= &meson_reset_toggle_ops,
25	.reset_num	= 6,
26	.level_offset	= 0x8,
27};
28
29static const struct meson_reset_param meson_g12a_audio_param = {
30	.reset_ops	= &meson_reset_toggle_ops,
31	.reset_num	= 26,
32	.level_offset	= 0x24,
33};
34
35static const struct meson_reset_param meson_sm1_audio_param = {
36	.reset_ops	= &meson_reset_toggle_ops,
37	.reset_num	= 39,
38	.level_offset	= 0x28,
39};
40
41static const struct auxiliary_device_id meson_reset_aux_ids[] = {
42	{
43		.name = "a1-audio-clkc.rst-a1",
44		.driver_data = (kernel_ulong_t)&meson_a1_audio_param,
45	}, {
46		.name = "a1-audio-clkc.rst-a1-vad",
47		.driver_data = (kernel_ulong_t)&meson_a1_audio_vad_param,
48	}, {
49		.name = "axg-audio-clkc.rst-g12a",
50		.driver_data = (kernel_ulong_t)&meson_g12a_audio_param,
51	}, {
52		.name = "axg-audio-clkc.rst-sm1",
53		.driver_data = (kernel_ulong_t)&meson_sm1_audio_param,
54	}, {}
55};
56MODULE_DEVICE_TABLE(auxiliary, meson_reset_aux_ids);
57
58static int meson_reset_aux_probe(struct auxiliary_device *adev,
59				 const struct auxiliary_device_id *id)
60{
61	const struct meson_reset_param *param =
62		(const struct meson_reset_param *)(id->driver_data);
63	struct regmap *map;
64
65	map = dev_get_regmap(adev->dev.parent, NULL);
66	if (!map)
67		return -EINVAL;
68
69	return meson_reset_controller_register(&adev->dev, map, param);
70}
71
72static struct auxiliary_driver meson_reset_aux_driver = {
73	.probe		= meson_reset_aux_probe,
74	.id_table	= meson_reset_aux_ids,
75};
76module_auxiliary_driver(meson_reset_aux_driver);
77
78MODULE_DESCRIPTION("Amlogic Meson Reset Auxiliary driver");
79MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
80MODULE_LICENSE("Dual BSD/GPL");
81MODULE_IMPORT_NS("MESON_RESET");