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	DEFINE_RES_MEM(0x0, 4)
24};
25
26static const struct resource sun6i_a31_apb0_clk_res[] = {
27	DEFINE_RES_MEM(0xc, 4)
28};
29
30static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
31	DEFINE_RES_MEM(0x28, 4)
32};
33
34static const struct resource sun6i_a31_ir_clk_res[] = {
35	DEFINE_RES_MEM(0x54, 4)
36};
37
38static const struct resource sun6i_a31_apb0_rstc_res[] = {
39	DEFINE_RES_MEM(0xb0, 4)
40};
41
42static const struct resource sun8i_codec_analog_res[] = {
43	DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE),
44};
45
46static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
47	{
48		.name = "sun6i-a31-ar100-clk",
49		.of_compatible = "allwinner,sun6i-a31-ar100-clk",
50		.num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
51		.resources = sun6i_a31_ar100_clk_res,
52	},
53	{
54		.name = "sun6i-a31-apb0-clk",
55		.of_compatible = "allwinner,sun6i-a31-apb0-clk",
56		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
57		.resources = sun6i_a31_apb0_clk_res,
58	},
59	{
60		.name = "sun6i-a31-apb0-gates-clk",
61		.of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
62		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
63		.resources = sun6i_a31_apb0_gates_clk_res,
64	},
65	{
66		.name = "sun6i-a31-ir-clk",
67		.of_compatible = "allwinner,sun4i-a10-mod0-clk",
68		.num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res),
69		.resources = sun6i_a31_ir_clk_res,
70	},
71	{
72		.name = "sun6i-a31-apb0-clock-reset",
73		.of_compatible = "allwinner,sun6i-a31-clock-reset",
74		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
75		.resources = sun6i_a31_apb0_rstc_res,
76	},
77};
78
79static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
80	{
81		.name = "sun8i-a23-apb0-clk",
82		.of_compatible = "allwinner,sun8i-a23-apb0-clk",
83		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
84		.resources = sun6i_a31_apb0_clk_res,
85	},
86	{
87		.name = "sun6i-a31-apb0-gates-clk",
88		.of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
89		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
90		.resources = sun6i_a31_apb0_gates_clk_res,
91	},
92	{
93		.name = "sun6i-a31-apb0-clock-reset",
94		.of_compatible = "allwinner,sun6i-a31-clock-reset",
95		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
96		.resources = sun6i_a31_apb0_rstc_res,
97	},
98	{
99		.name		= "sun8i-codec-analog",
100		.of_compatible	= "allwinner,sun8i-a23-codec-analog",
101		.num_resources	= ARRAY_SIZE(sun8i_codec_analog_res),
102		.resources	= sun8i_codec_analog_res,
103	},
104};
105
106static const struct prcm_data sun6i_a31_prcm_data = {
107	.nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
108	.subdevs = sun6i_a31_prcm_subdevs,
109};
110
111static const struct prcm_data sun8i_a23_prcm_data = {
112	.nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
113	.subdevs = sun8i_a23_prcm_subdevs,
114};
115
116static const struct of_device_id sun6i_prcm_dt_ids[] = {
117	{
118		.compatible = "allwinner,sun6i-a31-prcm",
119		.data = &sun6i_a31_prcm_data,
120	},
121	{
122		.compatible = "allwinner,sun8i-a23-prcm",
123		.data = &sun8i_a23_prcm_data,
124	},
125	{ /* sentinel */ },
126};
127
128static int sun6i_prcm_probe(struct platform_device *pdev)
129{
130	const struct of_device_id *match;
131	const struct prcm_data *data;
132	struct resource *res;
133	int ret;
134
135	match = of_match_node(sun6i_prcm_dt_ids, pdev->dev.of_node);
136	if (!match)
137		return -EINVAL;
138
139	data = match->data;
140
141	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
142	if (!res) {
143		dev_err(&pdev->dev, "no prcm memory region provided\n");
144		return -ENOENT;
145	}
146
147	ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
148			      res, -1, NULL);
149	if (ret) {
150		dev_err(&pdev->dev, "failed to add subdevices\n");
151		return ret;
152	}
153
154	return 0;
155}
156
157static struct platform_driver sun6i_prcm_driver = {
158	.driver = {
159		.name = "sun6i-prcm",
160		.of_match_table = sun6i_prcm_dt_ids,
161	},
162	.probe = sun6i_prcm_probe,
163};
164builtin_platform_driver(sun6i_prcm_driver);
165