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 
17 static 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 
23 static 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 
29 static 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 
35 static 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 
41 static 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 };
56 MODULE_DEVICE_TABLE(auxiliary, meson_reset_aux_ids);
57 
58 static 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 
72 static struct auxiliary_driver meson_reset_aux_driver = {
73 	.probe		= meson_reset_aux_probe,
74 	.id_table	= meson_reset_aux_ids,
75 };
76 module_auxiliary_driver(meson_reset_aux_driver);
77 
78 MODULE_DESCRIPTION("Amlogic Meson Reset Auxiliary driver");
79 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
80 MODULE_LICENSE("Dual BSD/GPL");
81 MODULE_IMPORT_NS("MESON_RESET");
82