aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mfd/sun6i-prcm.c
blob: 191173166d6532420c78b37735158204b2bd39a8 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
/*
 * Copyright (C) 2014 Free Electrons
 *
 * License Terms: GNU General Public License v2
 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
 *
 * Allwinner PRCM (Power/Reset/Clock Management) driver
 *
 */

#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>

struct prcm_data {
	int nsubdevs;
	const struct mfd_cell *subdevs;
};

static const struct resource sun6i_a31_ar100_clk_res[] = {
	{
		.start = 0x0,
		.end = 0x3,
		.flags = IORESOURCE_MEM,
	},
};

static const struct resource sun6i_a31_apb0_clk_res[] = {
	{
		.start = 0xc,
		.end = 0xf,
		.flags = IORESOURCE_MEM,
	},
};

static const struct resource sun6i_a31_apb0_gates_clk_res[] = {
	{
		.start = 0x28,
		.end = 0x2b,
		.flags = IORESOURCE_MEM,
	},
};

static const struct resource sun6i_a31_ir_clk_res[] = {
	{
		.start = 0x54,
		.end = 0x57,
		.flags = IORESOURCE_MEM,
	},
};

static const struct resource sun6i_a31_apb0_rstc_res[] = {
	{
		.start = 0xb0,
		.end = 0xb3,
		.flags = IORESOURCE_MEM,
	},
};

static const struct mfd_cell sun6i_a31_prcm_subdevs[] = {
	{
		.name = "sun6i-a31-ar100-clk",
		.of_compatible = "allwinner,sun6i-a31-ar100-clk",
		.num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res),
		.resources = sun6i_a31_ar100_clk_res,
	},
	{
		.name = "sun6i-a31-apb0-clk",
		.of_compatible = "allwinner,sun6i-a31-apb0-clk",
		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
		.resources = sun6i_a31_apb0_clk_res,
	},
	{
		.name = "sun6i-a31-apb0-gates-clk",
		.of_compatible = "allwinner,sun6i-a31-apb0-gates-clk",
		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
		.resources = sun6i_a31_apb0_gates_clk_res,
	},
	{
		.name = "sun6i-a31-ir-clk",
		.of_compatible = "allwinner,sun4i-a10-mod0-clk",
		.num_resources = ARRAY_SIZE(sun6i_a31_ir_clk_res),
		.resources = sun6i_a31_ir_clk_res,
	},
	{
		.name = "sun6i-a31-apb0-clock-reset",
		.of_compatible = "allwinner,sun6i-a31-clock-reset",
		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
		.resources = sun6i_a31_apb0_rstc_res,
	},
};

static const struct mfd_cell sun8i_a23_prcm_subdevs[] = {
	{
		.name = "sun8i-a23-apb0-clk",
		.of_compatible = "allwinner,sun8i-a23-apb0-clk",
		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res),
		.resources = sun6i_a31_apb0_clk_res,
	},
	{
		.name = "sun6i-a31-apb0-gates-clk",
		.of_compatible = "allwinner,sun8i-a23-apb0-gates-clk",
		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res),
		.resources = sun6i_a31_apb0_gates_clk_res,
	},
	{
		.name = "sun6i-a31-apb0-clock-reset",
		.of_compatible = "allwinner,sun6i-a31-clock-reset",
		.num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res),
		.resources = sun6i_a31_apb0_rstc_res,
	},
};

static const struct prcm_data sun6i_a31_prcm_data = {
	.nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs),
	.subdevs = sun6i_a31_prcm_subdevs,
};

static const struct prcm_data sun8i_a23_prcm_data = {
	.nsubdevs = ARRAY_SIZE(sun8i_a23_prcm_subdevs),
	.subdevs = sun8i_a23_prcm_subdevs,
};

static const struct of_device_id sun6i_prcm_dt_ids[] = {
	{
		.compatible = "allwinner,sun6i-a31-prcm",
		.data = &sun6i_a31_prcm_data,
	},
	{
		.compatible = "allwinner,sun8i-a23-prcm",
		.data = &sun8i_a23_prcm_data,
	},
	{ /* sentinel */ },
};

static int sun6i_prcm_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	const struct of_device_id *match;
	const struct prcm_data *data;
	struct resource *res;
	int ret;

	match = of_match_node(sun6i_prcm_dt_ids, np);
	if (!match)
		return -EINVAL;

	data = match->data;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "no prcm memory region provided\n");
		return -ENOENT;
	}

	ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs,
			      res, -1, NULL);
	if (ret) {
		dev_err(&pdev->dev, "failed to add subdevices\n");
		return ret;
	}

	return 0;
}

static struct platform_driver sun6i_prcm_driver = {
	.driver = {
		.name = "sun6i-prcm",
		.of_match_table = sun6i_prcm_dt_ids,
	},
	.probe = sun6i_prcm_probe,
};
module_platform_driver(sun6i_prcm_driver);

MODULE_AUTHOR("Boris BREZILLON <boris.brezillon@free-electrons.com>");
MODULE_DESCRIPTION("Allwinner sun6i PRCM driver");
MODULE_LICENSE("GPL v2");