summaryrefslogtreecommitdiffstats
path: root/drivers/soc/rockchip/grf.c
blob: 3b81e1d75a97e75fd579fcc38117f06e94d2450d (plain)
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
178
/*
 * Rockchip Generic Register Files setup
 *
 * Copyright (c) 2016 Heiko Stuebner <heiko@sntech.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/err.h>
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#define HIWORD_UPDATE(val, mask, shift) \
		((val) << (shift) | (mask) << ((shift) + 16))

struct rockchip_grf_value {
	const char *desc;
	u32 reg;
	u32 val;
};

struct rockchip_grf_info {
	const struct rockchip_grf_value *values;
	int num_values;
};

#define RK3036_GRF_SOC_CON0		0x140

static const struct rockchip_grf_value rk3036_defaults[] __initconst = {
	/*
	 * Disable auto jtag/sdmmc switching that causes issues with the
	 * clock-framework and the mmc controllers making them unreliable.
	 */
	{ "jtag switching", RK3036_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 11) },
};

static const struct rockchip_grf_info rk3036_grf __initconst = {
	.values = rk3036_defaults,
	.num_values = ARRAY_SIZE(rk3036_defaults),
};

#define RK3128_GRF_SOC_CON0		0x140

static const struct rockchip_grf_value rk3128_defaults[] __initconst = {
	{ "jtag switching", RK3128_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 8) },
};

static const struct rockchip_grf_info rk3128_grf __initconst = {
	.values = rk3128_defaults,
	.num_values = ARRAY_SIZE(rk3128_defaults),
};

#define RK3228_GRF_SOC_CON6		0x418

static const struct rockchip_grf_value rk3228_defaults[] __initconst = {
	{ "jtag switching", RK3228_GRF_SOC_CON6, HIWORD_UPDATE(0, 1, 8) },
};

static const struct rockchip_grf_info rk3228_grf __initconst = {
	.values = rk3228_defaults,
	.num_values = ARRAY_SIZE(rk3228_defaults),
};

#define RK3288_GRF_SOC_CON0		0x244
#define RK3288_GRF_SOC_CON2		0x24c

static const struct rockchip_grf_value rk3288_defaults[] __initconst = {
	{ "jtag switching", RK3288_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 12) },
	{ "pwm select", RK3288_GRF_SOC_CON2, HIWORD_UPDATE(1, 1, 0) },
};

static const struct rockchip_grf_info rk3288_grf __initconst = {
	.values = rk3288_defaults,
	.num_values = ARRAY_SIZE(rk3288_defaults),
};

#define RK3328_GRF_SOC_CON4		0x410

static const struct rockchip_grf_value rk3328_defaults[] __initconst = {
	{ "jtag switching", RK3328_GRF_SOC_CON4, HIWORD_UPDATE(0, 1, 12) },
};

static const struct rockchip_grf_info rk3328_grf __initconst = {
	.values = rk3328_defaults,
	.num_values = ARRAY_SIZE(rk3328_defaults),
};

#define RK3368_GRF_SOC_CON15		0x43c

static const struct rockchip_grf_value rk3368_defaults[] __initconst = {
	{ "jtag switching", RK3368_GRF_SOC_CON15, HIWORD_UPDATE(0, 1, 13) },
};

static const struct rockchip_grf_info rk3368_grf __initconst = {
	.values = rk3368_defaults,
	.num_values = ARRAY_SIZE(rk3368_defaults),
};

#define RK3399_GRF_SOC_CON7		0xe21c

static const struct rockchip_grf_value rk3399_defaults[] __initconst = {
	{ "jtag switching", RK3399_GRF_SOC_CON7, HIWORD_UPDATE(0, 1, 12) },
};

static const struct rockchip_grf_info rk3399_grf __initconst = {
	.values = rk3399_defaults,
	.num_values = ARRAY_SIZE(rk3399_defaults),
};

static const struct of_device_id rockchip_grf_dt_match[] __initconst = {
	{
		.compatible = "rockchip,rk3036-grf",
		.data = (void *)&rk3036_grf,
	}, {
		.compatible = "rockchip,rk3128-grf",
		.data = (void *)&rk3128_grf,
	}, {
		.compatible = "rockchip,rk3228-grf",
		.data = (void *)&rk3228_grf,
	}, {
		.compatible = "rockchip,rk3288-grf",
		.data = (void *)&rk3288_grf,
	}, {
		.compatible = "rockchip,rk3328-grf",
		.data = (void *)&rk3328_grf,
	}, {
		.compatible = "rockchip,rk3368-grf",
		.data = (void *)&rk3368_grf,
	}, {
		.compatible = "rockchip,rk3399-grf",
		.data = (void *)&rk3399_grf,
	},
	{ /* sentinel */ },
};

static int __init rockchip_grf_init(void)
{
	const struct rockchip_grf_info *grf_info;
	const struct of_device_id *match;
	struct device_node *np;
	struct regmap *grf;
	int ret, i;

	np = of_find_matching_node_and_match(NULL, rockchip_grf_dt_match,
					     &match);
	if (!np)
		return -ENODEV;
	if (!match || !match->data) {
		pr_err("%s: missing grf data\n", __func__);
		return -EINVAL;
	}

	grf_info = match->data;

	grf = syscon_node_to_regmap(np);
	if (IS_ERR(grf)) {
		pr_err("%s: could not get grf syscon\n", __func__);
		return PTR_ERR(grf);
	}

	for (i = 0; i < grf_info->num_values; i++) {
		const struct rockchip_grf_value *val = &grf_info->values[i];

		pr_debug("%s: adjusting %s in %#6x to %#10x\n", __func__,
			val->desc, val->reg, val->val);
		ret = regmap_write(grf, val->reg, val->val);
		if (ret < 0)
			pr_err("%s: write to %#6x failed with %d\n",
			       __func__, val->reg, ret);
	}

	return 0;
}
postcore_initcall(rockchip_grf_init);