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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4c58063d HS |
2 | /* |
3 | * Rockchip Generic Register Files setup | |
4 | * | |
5 | * Copyright (c) 2016 Heiko Stuebner <heiko@sntech.de> | |
4c58063d HS |
6 | */ |
7 | ||
8 | #include <linux/err.h> | |
9 | #include <linux/mfd/syscon.h> | |
10 | #include <linux/of_device.h> | |
11 | #include <linux/platform_device.h> | |
12 | #include <linux/regmap.h> | |
13 | ||
14 | #define HIWORD_UPDATE(val, mask, shift) \ | |
15 | ((val) << (shift) | (mask) << ((shift) + 16)) | |
16 | ||
17 | struct rockchip_grf_value { | |
18 | const char *desc; | |
19 | u32 reg; | |
20 | u32 val; | |
21 | }; | |
22 | ||
23 | struct rockchip_grf_info { | |
24 | const struct rockchip_grf_value *values; | |
25 | int num_values; | |
26 | }; | |
27 | ||
28 | #define RK3036_GRF_SOC_CON0 0x140 | |
29 | ||
30 | static const struct rockchip_grf_value rk3036_defaults[] __initconst = { | |
31 | /* | |
32 | * Disable auto jtag/sdmmc switching that causes issues with the | |
33 | * clock-framework and the mmc controllers making them unreliable. | |
34 | */ | |
35 | { "jtag switching", RK3036_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 11) }, | |
36 | }; | |
37 | ||
38 | static const struct rockchip_grf_info rk3036_grf __initconst = { | |
39 | .values = rk3036_defaults, | |
40 | .num_values = ARRAY_SIZE(rk3036_defaults), | |
41 | }; | |
42 | ||
6e61c891 XY |
43 | #define RK3128_GRF_SOC_CON0 0x140 |
44 | ||
45 | static const struct rockchip_grf_value rk3128_defaults[] __initconst = { | |
46 | { "jtag switching", RK3128_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 8) }, | |
47 | }; | |
48 | ||
49 | static const struct rockchip_grf_info rk3128_grf __initconst = { | |
50 | .values = rk3128_defaults, | |
51 | .num_values = ARRAY_SIZE(rk3128_defaults), | |
52 | }; | |
53 | ||
e17ee5f0 SL |
54 | #define RK3228_GRF_SOC_CON6 0x418 |
55 | ||
56 | static const struct rockchip_grf_value rk3228_defaults[] __initconst = { | |
57 | { "jtag switching", RK3228_GRF_SOC_CON6, HIWORD_UPDATE(0, 1, 8) }, | |
58 | }; | |
59 | ||
60 | static const struct rockchip_grf_info rk3228_grf __initconst = { | |
61 | .values = rk3228_defaults, | |
62 | .num_values = ARRAY_SIZE(rk3228_defaults), | |
63 | }; | |
64 | ||
4c58063d | 65 | #define RK3288_GRF_SOC_CON0 0x244 |
bbdc00a7 | 66 | #define RK3288_GRF_SOC_CON2 0x24c |
4c58063d HS |
67 | |
68 | static const struct rockchip_grf_value rk3288_defaults[] __initconst = { | |
69 | { "jtag switching", RK3288_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 12) }, | |
bbdc00a7 | 70 | { "pwm select", RK3288_GRF_SOC_CON2, HIWORD_UPDATE(1, 1, 0) }, |
4c58063d HS |
71 | }; |
72 | ||
73 | static const struct rockchip_grf_info rk3288_grf __initconst = { | |
74 | .values = rk3288_defaults, | |
75 | .num_values = ARRAY_SIZE(rk3288_defaults), | |
76 | }; | |
77 | ||
887758c3 SL |
78 | #define RK3328_GRF_SOC_CON4 0x410 |
79 | ||
80 | static const struct rockchip_grf_value rk3328_defaults[] __initconst = { | |
81 | { "jtag switching", RK3328_GRF_SOC_CON4, HIWORD_UPDATE(0, 1, 12) }, | |
82 | }; | |
83 | ||
84 | static const struct rockchip_grf_info rk3328_grf __initconst = { | |
85 | .values = rk3328_defaults, | |
86 | .num_values = ARRAY_SIZE(rk3328_defaults), | |
87 | }; | |
88 | ||
4c58063d HS |
89 | #define RK3368_GRF_SOC_CON15 0x43c |
90 | ||
91 | static const struct rockchip_grf_value rk3368_defaults[] __initconst = { | |
92 | { "jtag switching", RK3368_GRF_SOC_CON15, HIWORD_UPDATE(0, 1, 13) }, | |
93 | }; | |
94 | ||
95 | static const struct rockchip_grf_info rk3368_grf __initconst = { | |
96 | .values = rk3368_defaults, | |
97 | .num_values = ARRAY_SIZE(rk3368_defaults), | |
98 | }; | |
99 | ||
100 | #define RK3399_GRF_SOC_CON7 0xe21c | |
101 | ||
102 | static const struct rockchip_grf_value rk3399_defaults[] __initconst = { | |
103 | { "jtag switching", RK3399_GRF_SOC_CON7, HIWORD_UPDATE(0, 1, 12) }, | |
104 | }; | |
105 | ||
106 | static const struct rockchip_grf_info rk3399_grf __initconst = { | |
107 | .values = rk3399_defaults, | |
108 | .num_values = ARRAY_SIZE(rk3399_defaults), | |
109 | }; | |
110 | ||
111 | static const struct of_device_id rockchip_grf_dt_match[] __initconst = { | |
112 | { | |
113 | .compatible = "rockchip,rk3036-grf", | |
114 | .data = (void *)&rk3036_grf, | |
6e61c891 XY |
115 | }, { |
116 | .compatible = "rockchip,rk3128-grf", | |
117 | .data = (void *)&rk3128_grf, | |
e17ee5f0 SL |
118 | }, { |
119 | .compatible = "rockchip,rk3228-grf", | |
120 | .data = (void *)&rk3228_grf, | |
4c58063d HS |
121 | }, { |
122 | .compatible = "rockchip,rk3288-grf", | |
123 | .data = (void *)&rk3288_grf, | |
887758c3 SL |
124 | }, { |
125 | .compatible = "rockchip,rk3328-grf", | |
126 | .data = (void *)&rk3328_grf, | |
4c58063d HS |
127 | }, { |
128 | .compatible = "rockchip,rk3368-grf", | |
129 | .data = (void *)&rk3368_grf, | |
130 | }, { | |
131 | .compatible = "rockchip,rk3399-grf", | |
132 | .data = (void *)&rk3399_grf, | |
133 | }, | |
134 | { /* sentinel */ }, | |
135 | }; | |
136 | ||
137 | static int __init rockchip_grf_init(void) | |
138 | { | |
139 | const struct rockchip_grf_info *grf_info; | |
140 | const struct of_device_id *match; | |
141 | struct device_node *np; | |
142 | struct regmap *grf; | |
143 | int ret, i; | |
144 | ||
145 | np = of_find_matching_node_and_match(NULL, rockchip_grf_dt_match, | |
146 | &match); | |
147 | if (!np) | |
148 | return -ENODEV; | |
149 | if (!match || !match->data) { | |
150 | pr_err("%s: missing grf data\n", __func__); | |
151 | return -EINVAL; | |
152 | } | |
153 | ||
154 | grf_info = match->data; | |
155 | ||
156 | grf = syscon_node_to_regmap(np); | |
157 | if (IS_ERR(grf)) { | |
158 | pr_err("%s: could not get grf syscon\n", __func__); | |
159 | return PTR_ERR(grf); | |
160 | } | |
161 | ||
162 | for (i = 0; i < grf_info->num_values; i++) { | |
163 | const struct rockchip_grf_value *val = &grf_info->values[i]; | |
164 | ||
165 | pr_debug("%s: adjusting %s in %#6x to %#10x\n", __func__, | |
166 | val->desc, val->reg, val->val); | |
167 | ret = regmap_write(grf, val->reg, val->val); | |
168 | if (ret < 0) | |
169 | pr_err("%s: write to %#6x failed with %d\n", | |
170 | __func__, val->reg, ret); | |
171 | } | |
172 | ||
173 | return 0; | |
174 | } | |
175 | postcore_initcall(rockchip_grf_init); |