GNU Linux-libre 5.19-rc6-gnu
[releases.git] / drivers / mfd / sun6i-prcm.c
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
17 struct prcm_data {
18         int nsubdevs;
19         const struct mfd_cell *subdevs;
20 };
21
22 static const struct resource sun6i_a31_ar100_clk_res[] = {
23         DEFINE_RES_MEM(0x0, 4)
24 };
25
26 static const struct resource sun6i_a31_apb0_clk_res[] = {
27         DEFINE_RES_MEM(0xc, 4)
28 };
29
30 static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
31         DEFINE_RES_MEM(0x28, 4)
32 };
33
34 static const struct resource sun6i_a31_ir_clk_res[] = {
35         DEFINE_RES_MEM(0x54, 4)
36 };
37
38 static const struct resource sun6i_a31_apb0_rstc_res[] = {
39         DEFINE_RES_MEM(0xb0, 4)
40 };
41
42 static const struct resource sun8i_codec_analog_res[] = {
43         DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE),
44 };
45
46 static 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
79 static 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
106 static const struct prcm_data sun6i_a31_prcm_data = {
107         .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
108         .subdevs = sun6i_a31_prcm_subdevs,
109 };
110
111 static const struct prcm_data sun8i_a23_prcm_data = {
112         .nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
113         .subdevs = sun8i_a23_prcm_subdevs,
114 };
115
116 static 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
128 static 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
157 static 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 };
164 builtin_platform_driver(sun6i_prcm_driver);