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d58603cc BB |
1 | /* |
2 | * Copyright (C) 2014 Free Electrons | |
3 | * | |
4 | * License Terms: GNU General Public License v2 | |
5 | * Author: Boris BREZILLON <boris.brezillon@free-electrons.com> | |
6 | * | |
7 | * Allwinner PRCM (Power/Reset/Clock Management) driver | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <linux/mfd/core.h> | |
391cd33a | 12 | #include <linux/init.h> |
d58603cc BB |
13 | #include <linux/of.h> |
14 | ||
ea1628e8 CYT |
15 | #define SUN8I_CODEC_ANALOG_BASE 0x1c0 |
16 | #define SUN8I_CODEC_ANALOG_SIZE 0x4 | |
17 | ||
d58603cc BB |
18 | struct prcm_data { |
19 | int nsubdevs; | |
20 | const struct mfd_cell *subdevs; | |
21 | }; | |
22 | ||
23 | static const struct resource sun6i_a31_ar100_clk_res[] = { | |
24 | { | |
25 | .start = 0x0, | |
26 | .end = 0x3, | |
27 | .flags = IORESOURCE_MEM, | |
28 | }, | |
29 | }; | |
30 | ||
31 | static const struct resource sun6i_a31_apb0_clk_res[] = { | |
32 | { | |
33 | .start = 0xc, | |
34 | .end = 0xf, | |
35 | .flags = IORESOURCE_MEM, | |
36 | }, | |
37 | }; | |
38 | ||
39 | static const struct resource sun6i_a31_apb0_gates_clk_res[] = { | |
40 | { | |
41 | .start = 0x28, | |
42 | .end = 0x2b, | |
43 | .flags = IORESOURCE_MEM, | |
44 | }, | |
45 | }; | |
46 | ||
6f262ecf HG |
47 | static const struct resource sun6i_a31_ir_clk_res[] = { |
48 | { | |
49 | .start = 0x54, | |
50 | .end = 0x57, | |
51 | .flags = IORESOURCE_MEM, | |
52 | }, | |
53 | }; | |
54 | ||
d58603cc BB |
55 | static const struct resource sun6i_a31_apb0_rstc_res[] = { |
56 | { | |
57 | .start = 0xb0, | |
58 | .end = 0xb3, | |
59 | .flags = IORESOURCE_MEM, | |
60 | }, | |
61 | }; | |
62 | ||
ea1628e8 CYT |
63 | static const struct resource sun8i_codec_analog_res[] = { |
64 | DEFINE_RES_MEM(SUN8I_CODEC_ANALOG_BASE, SUN8I_CODEC_ANALOG_SIZE), | |
65 | }; | |
66 | ||
d58603cc BB |
67 | static const struct mfd_cell sun6i_a31_prcm_subdevs[] = { |
68 | { | |
69 | .name = "sun6i-a31-ar100-clk", | |
70 | .of_compatible = "allwinner,sun6i-a31-ar100-clk", | |
71 | .num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res), | |
72 | .resources = sun6i_a31_ar100_clk_res, | |
73 | }, | |
74 | { | |
75 | .name = "sun6i-a31-apb0-clk", | |
76 | .of_compatible = "allwinner,sun6i-a31-apb0-clk", | |
77 | .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res), | |
78 | .resources = sun6i_a31_apb0_clk_res, | |
79 | }, | |
80 | { | |
81 | .name = "sun6i-a31-apb0-gates-clk", | |
82 | .of_compatible = "allwinner,sun6i-a31-apb0-gates-clk", | |
83 | .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res), | |
84 | .resources = sun6i_a31_apb0_gates_clk_res, | |
85 | }, | |
6f262ecf HG |
86 | { |
87 | .name = "sun6i-a31-ir-clk", | |
88 | .of_compatible = "allwinner,sun4i-a10-mod0-clk", | |
89 | .num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res), | |
90 | .resources = sun6i_a31_ir_clk_res, | |
91 | }, | |
d58603cc BB |
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 | ||
4eb9560b CYT |
100 | static const struct mfd_cell sun8i_a23_prcm_subdevs[] = { |
101 | { | |
102 | .name = "sun8i-a23-apb0-clk", | |
103 | .of_compatible = "allwinner,sun8i-a23-apb0-clk", | |
104 | .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res), | |
105 | .resources = sun6i_a31_apb0_clk_res, | |
106 | }, | |
107 | { | |
108 | .name = "sun6i-a31-apb0-gates-clk", | |
109 | .of_compatible = "allwinner,sun8i-a23-apb0-gates-clk", | |
110 | .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res), | |
111 | .resources = sun6i_a31_apb0_gates_clk_res, | |
112 | }, | |
113 | { | |
114 | .name = "sun6i-a31-apb0-clock-reset", | |
115 | .of_compatible = "allwinner,sun6i-a31-clock-reset", | |
116 | .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res), | |
117 | .resources = sun6i_a31_apb0_rstc_res, | |
118 | }, | |
ea1628e8 CYT |
119 | { |
120 | .name = "sun8i-codec-analog", | |
121 | .of_compatible = "allwinner,sun8i-a23-codec-analog", | |
122 | .num_resources = ARRAY_SIZE(sun8i_codec_analog_res), | |
123 | .resources = sun8i_codec_analog_res, | |
124 | }, | |
4eb9560b CYT |
125 | }; |
126 | ||
d58603cc BB |
127 | static const struct prcm_data sun6i_a31_prcm_data = { |
128 | .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs), | |
129 | .subdevs = sun6i_a31_prcm_subdevs, | |
130 | }; | |
131 | ||
4eb9560b CYT |
132 | static const struct prcm_data sun8i_a23_prcm_data = { |
133 | .nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs), | |
134 | .subdevs = sun8i_a23_prcm_subdevs, | |
135 | }; | |
136 | ||
d58603cc BB |
137 | static const struct of_device_id sun6i_prcm_dt_ids[] = { |
138 | { | |
139 | .compatible = "allwinner,sun6i-a31-prcm", | |
140 | .data = &sun6i_a31_prcm_data, | |
141 | }, | |
4eb9560b CYT |
142 | { |
143 | .compatible = "allwinner,sun8i-a23-prcm", | |
144 | .data = &sun8i_a23_prcm_data, | |
145 | }, | |
d58603cc BB |
146 | { /* sentinel */ }, |
147 | }; | |
148 | ||
149 | static int sun6i_prcm_probe(struct platform_device *pdev) | |
150 | { | |
151 | struct device_node *np = pdev->dev.of_node; | |
152 | const struct of_device_id *match; | |
153 | const struct prcm_data *data; | |
154 | struct resource *res; | |
155 | int ret; | |
156 | ||
157 | match = of_match_node(sun6i_prcm_dt_ids, np); | |
158 | if (!match) | |
159 | return -EINVAL; | |
160 | ||
161 | data = match->data; | |
162 | ||
163 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
164 | if (!res) { | |
165 | dev_err(&pdev->dev, "no prcm memory region provided\n"); | |
166 | return -ENOENT; | |
167 | } | |
168 | ||
169 | ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs, | |
170 | res, -1, NULL); | |
171 | if (ret) { | |
172 | dev_err(&pdev->dev, "failed to add subdevices\n"); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static struct platform_driver sun6i_prcm_driver = { | |
180 | .driver = { | |
181 | .name = "sun6i-prcm", | |
d58603cc BB |
182 | .of_match_table = sun6i_prcm_dt_ids, |
183 | }, | |
184 | .probe = sun6i_prcm_probe, | |
185 | }; | |
391cd33a | 186 | builtin_platform_driver(sun6i_prcm_driver); |