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(matches: sun6i_prcm_dt_ids, node: 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(parent: &pdev->dev, id: 0, cells: data->subdevs, n_devs: data->nsubdevs, |
148 | mem_base: res, irq_base: -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); |
165 | |