1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Rockchip Generic Register Files setup 4 * 5 * Copyright (c) 2016 Heiko Stuebner <heiko@sntech.de> 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 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 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 65 #define RK3288_GRF_SOC_CON0 0x244 66 #define RK3288_GRF_SOC_CON2 0x24c 67 68 static const struct rockchip_grf_value rk3288_defaults[] __initconst = { 69 { "jtag switching", RK3288_GRF_SOC_CON0, HIWORD_UPDATE(0, 1, 12) }, 70 { "pwm select", RK3288_GRF_SOC_CON2, HIWORD_UPDATE(1, 1, 0) }, 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 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 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, 115 }, { 116 .compatible = "rockchip,rk3128-grf", 117 .data = (void *)&rk3128_grf, 118 }, { 119 .compatible = "rockchip,rk3228-grf", 120 .data = (void *)&rk3228_grf, 121 }, { 122 .compatible = "rockchip,rk3288-grf", 123 .data = (void *)&rk3288_grf, 124 }, { 125 .compatible = "rockchip,rk3328-grf", 126 .data = (void *)&rk3328_grf, 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 of_node_put(np); 152 return -EINVAL; 153 } 154 155 grf_info = match->data; 156 157 grf = syscon_node_to_regmap(np); 158 of_node_put(np); 159 if (IS_ERR(grf)) { 160 pr_err("%s: could not get grf syscon\n", __func__); 161 return PTR_ERR(grf); 162 } 163 164 for (i = 0; i < grf_info->num_values; i++) { 165 const struct rockchip_grf_value *val = &grf_info->values[i]; 166 167 pr_debug("%s: adjusting %s in %#6x to %#10x\n", __func__, 168 val->desc, val->reg, val->val); 169 ret = regmap_write(grf, val->reg, val->val); 170 if (ret < 0) 171 pr_err("%s: write to %#6x failed with %d\n", 172 __func__, val->reg, ret); 173 } 174 175 return 0; 176 } 177 postcore_initcall(rockchip_grf_init); 178