1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2014 Free Electrons
4 *
5 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
6 *
7 * Allwinner PRCM (Power/Reset/Clock Management) driver
8 */
9
10#include <linux/mfd/core.h>
11#include <linux/init.h>
12#include <linux/of.h>
13
14#define SUN8I_CODEC_ANALOG_BASE	0x1c0
15#define SUN8I_CODEC_ANALOG_SIZE	0x4
16
17struct prcm_data {
18	int nsubdevs;
19	const struct mfd_cell *subdevs;
20};
21
22static const struct resource sun6i_a31_ar100_clk_res[] = {
23	{
24		.start = 0x0,
25		.end = 0x3,
26		.flags = IORESOURCE_MEM,
27	},
28};
29
30static const struct resource sun6i_a31_apb0_clk_res[] = {
31	{
32		.start = 0xc,
33		.end = 0xf,
34		.flags = IORESOURCE_MEM,
35	},
36};
37
38static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
39	{
40		.start = 0x28,
41		.end = 0x2b,
42		.flags = IORESOURCE_MEM,
43	},
44};
45
46static const struct resource sun6i_a31_ir_clk_res[] = {
47	{
48		.start = 0x54,
49		.end = 0x57,
50		.flags = IORESOURCE_MEM,
51	},
52};
53
54static const struct resource sun6i_a31_apb0_rstc_res[] = {
55	{
56		.start = 0xb0,
57		.end = 0xb3,
58		.flags = IORESOURCE_MEM,
59	},
60};
61
62static const struct resource sun8i_codec_analog_res[] = {
63	DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE),
64};
65
66static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
67	{
68		.name = "sun6i-a31-ar100-clk",
69		.of_compatible = "allwinner,sun6i-a31-ar100-clk",
70		.num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
71		.resources = sun6i_a31_ar100_clk_res,
72	},
73	{
74		.name = "sun6i-a31-apb0-clk",
75		.of_compatible = "allwinner,sun6i-a31-apb0-clk",
76		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
77		.resources = sun6i_a31_apb0_clk_res,
78	},
79	{
80		.name = "sun6i-a31-apb0-gates-clk",
81		.of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
82		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
83		.resources = sun6i_a31_apb0_gates_clk_res,
84	},
85	{
86		.name = "sun6i-a31-ir-clk",
87		.of_compatible = "allwinner,sun4i-a10-mod0-clk",
88		.num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res),
89		.resources = sun6i_a31_ir_clk_res,
90	},
91	{
92		.name = "sun6i-a31-apb0-clock-reset",
93		.of_compatible = "allwinner,sun6i-a31-clock-reset",
94		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
95		.resources = sun6i_a31_apb0_rstc_res,
96	},
97};
98
99static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
100	{
101		.name = "sun8i-a23-apb0-clk",
102		.of_compatible = "allwinner,sun8i-a23-apb0-clk",
103		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
104		.resources = sun6i_a31_apb0_clk_res,
105	},
106	{
107		.name = "sun6i-a31-apb0-gates-clk",
108		.of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
109		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
110		.resources = sun6i_a31_apb0_gates_clk_res,
111	},
112	{
113		.name = "sun6i-a31-apb0-clock-reset",
114		.of_compatible = "allwinner,sun6i-a31-clock-reset",
115		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
116		.resources = sun6i_a31_apb0_rstc_res,
117	},
118	{
119		.name		= "sun8i-codec-analog",
120		.of_compatible	= "allwinner,sun8i-a23-codec-analog",
121		.num_resources	= ARRAY_SIZE(sun8i_codec_analog_res),
122		.resources	= sun8i_codec_analog_res,
123	},
124};
125
126static const struct prcm_data sun6i_a31_prcm_data = {
127	.nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
128	.subdevs = sun6i_a31_prcm_subdevs,
129};
130
131static const struct prcm_data sun8i_a23_prcm_data = {
132	.nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
133	.subdevs = sun8i_a23_prcm_subdevs,
134};
135
136static const struct of_device_id sun6i_prcm_dt_ids[] = {
137	{
138		.compatible = "allwinner,sun6i-a31-prcm",
139		.data = &sun6i_a31_prcm_data,
140	},
141	{
142		.compatible = "allwinner,sun8i-a23-prcm",
143		.data = &sun8i_a23_prcm_data,
144	},
145	{ /* sentinel */ },
146};
147
148static int sun6i_prcm_probe(struct platform_device *pdev)
149{
150	const struct of_device_id *match;
151	const struct prcm_data *data;
152	struct resource *res;
153	int ret;
154
155	match = of_match_node(sun6i_prcm_dt_ids, pdev->dev.of_node);
156	if (!match)
157		return -EINVAL;
158
159	data = match->data;
160
161	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
162	if (!res) {
163		dev_err(&pdev->dev, "no prcm memory region provided\n");
164		return -ENOENT;
165	}
166
167	ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
168			      res, -1, NULL);
169	if (ret) {
170		dev_err(&pdev->dev, "failed to add subdevices\n");
171		return ret;
172	}
173
174	return 0;
175}
176
177static struct platform_driver sun6i_prcm_driver = {
178	.driver = {
179		.name = "sun6i-prcm",
180		.of_match_table = sun6i_prcm_dt_ids,
181	},
182	.probe = sun6i_prcm_probe,
183};
184builtin_platform_driver(sun6i_prcm_driver);
185