tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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");