1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2016 Linaro. 4 * Viresh Kumar <viresh.kumar@linaro.org> 5 */ 6 7 #include <linux/err.h> 8 #include <linux/of.h> 9 #include <linux/platform_device.h> 10 11 #include "cpufreq-dt.h" 12 13 /* 14 * Machines for which the cpufreq device is *always* created, mostly used for 15 * platforms using "operating-points" (V1) property. 16 */ 17 static const struct of_device_id allowlist[] __initconst = { 18 { .compatible = "allwinner,sun4i-a10", }, 19 { .compatible = "allwinner,sun5i-a10s", }, 20 { .compatible = "allwinner,sun5i-a13", }, 21 { .compatible = "allwinner,sun5i-r8", }, 22 { .compatible = "allwinner,sun6i-a31", }, 23 { .compatible = "allwinner,sun6i-a31s", }, 24 { .compatible = "allwinner,sun7i-a20", }, 25 { .compatible = "allwinner,sun8i-a23", }, 26 { .compatible = "allwinner,sun8i-a83t", }, 27 { .compatible = "allwinner,sun8i-h3", }, 28 29 { .compatible = "apm,xgene-shadowcat", }, 30 31 { .compatible = "arm,integrator-ap", }, 32 { .compatible = "arm,integrator-cp", }, 33 34 { .compatible = "hisilicon,hi3660", }, 35 36 { .compatible = "fsl,imx27", }, 37 { .compatible = "fsl,imx51", }, 38 { .compatible = "fsl,imx53", }, 39 40 { .compatible = "marvell,berlin", }, 41 { .compatible = "marvell,pxa250", }, 42 { .compatible = "marvell,pxa270", }, 43 44 { .compatible = "samsung,exynos3250", }, 45 { .compatible = "samsung,exynos4210", }, 46 { .compatible = "samsung,exynos5250", }, 47 #ifndef CONFIG_BL_SWITCHER 48 { .compatible = "samsung,exynos5800", }, 49 #endif 50 51 { .compatible = "renesas,emev2", }, 52 { .compatible = "renesas,r7s72100", }, 53 { .compatible = "renesas,r8a73a4", }, 54 { .compatible = "renesas,r8a7740", }, 55 { .compatible = "renesas,r8a7742", }, 56 { .compatible = "renesas,r8a7743", }, 57 { .compatible = "renesas,r8a7744", }, 58 { .compatible = "renesas,r8a7745", }, 59 { .compatible = "renesas,r8a7778", }, 60 { .compatible = "renesas,r8a7779", }, 61 { .compatible = "renesas,r8a7790", }, 62 { .compatible = "renesas,r8a7791", }, 63 { .compatible = "renesas,r8a7792", }, 64 { .compatible = "renesas,r8a7793", }, 65 { .compatible = "renesas,r8a7794", }, 66 { .compatible = "renesas,sh73a0", }, 67 68 { .compatible = "rockchip,rk2928", }, 69 { .compatible = "rockchip,rk3036", }, 70 { .compatible = "rockchip,rk3066a", }, 71 { .compatible = "rockchip,rk3066b", }, 72 { .compatible = "rockchip,rk3188", }, 73 { .compatible = "rockchip,rk3228", }, 74 { .compatible = "rockchip,rk3288", }, 75 { .compatible = "rockchip,rk3328", }, 76 { .compatible = "rockchip,rk3366", }, 77 { .compatible = "rockchip,rk3368", }, 78 { .compatible = "rockchip,rk3399", 79 .data = &(struct cpufreq_dt_platform_data) 80 { .have_governor_per_policy = true, }, 81 }, 82 83 { .compatible = "st-ericsson,u8500", }, 84 { .compatible = "st-ericsson,u8540", }, 85 { .compatible = "st-ericsson,u9500", }, 86 { .compatible = "st-ericsson,u9540", }, 87 88 { .compatible = "ti,omap2", }, 89 { .compatible = "ti,omap4", }, 90 { .compatible = "ti,omap5", }, 91 92 { .compatible = "xlnx,zynq-7000", }, 93 { .compatible = "xlnx,zynqmp", }, 94 95 { } 96 }; 97 98 /* 99 * Machines for which the cpufreq device is *not* created, mostly used for 100 * platforms using "operating-points-v2" property. 101 */ 102 static const struct of_device_id blocklist[] __initconst = { 103 { .compatible = "allwinner,sun50i-h6", }, 104 105 { .compatible = "apple,arm-platform", }, 106 107 { .compatible = "arm,vexpress", }, 108 109 { .compatible = "calxeda,highbank", }, 110 { .compatible = "calxeda,ecx-2000", }, 111 112 { .compatible = "fsl,imx7ulp", }, 113 { .compatible = "fsl,imx7d", }, 114 { .compatible = "fsl,imx7s", }, 115 { .compatible = "fsl,imx8mq", }, 116 { .compatible = "fsl,imx8mm", }, 117 { .compatible = "fsl,imx8mn", }, 118 { .compatible = "fsl,imx8mp", }, 119 120 { .compatible = "marvell,armadaxp", }, 121 122 { .compatible = "mediatek,mt2701", }, 123 { .compatible = "mediatek,mt2712", }, 124 { .compatible = "mediatek,mt7622", }, 125 { .compatible = "mediatek,mt7623", }, 126 { .compatible = "mediatek,mt8167", }, 127 { .compatible = "mediatek,mt817x", }, 128 { .compatible = "mediatek,mt8173", }, 129 { .compatible = "mediatek,mt8176", }, 130 { .compatible = "mediatek,mt8183", }, 131 { .compatible = "mediatek,mt8186", }, 132 { .compatible = "mediatek,mt8365", }, 133 { .compatible = "mediatek,mt8516", }, 134 135 { .compatible = "nvidia,tegra20", }, 136 { .compatible = "nvidia,tegra30", }, 137 { .compatible = "nvidia,tegra124", }, 138 { .compatible = "nvidia,tegra210", }, 139 { .compatible = "nvidia,tegra234", }, 140 141 { .compatible = "qcom,apq8096", }, 142 { .compatible = "qcom,msm8996", }, 143 { .compatible = "qcom,qcs404", }, 144 { .compatible = "qcom,sa8155p" }, 145 { .compatible = "qcom,sa8540p" }, 146 { .compatible = "qcom,sc7180", }, 147 { .compatible = "qcom,sc7280", }, 148 { .compatible = "qcom,sc8180x", }, 149 { .compatible = "qcom,sc8280xp", }, 150 { .compatible = "qcom,sdm845", }, 151 { .compatible = "qcom,sm6115", }, 152 { .compatible = "qcom,sm6350", }, 153 { .compatible = "qcom,sm6375", }, 154 { .compatible = "qcom,sm8150", }, 155 { .compatible = "qcom,sm8250", }, 156 { .compatible = "qcom,sm8350", }, 157 158 { .compatible = "st,stih407", }, 159 { .compatible = "st,stih410", }, 160 { .compatible = "st,stih418", }, 161 162 { .compatible = "ti,am33xx", }, 163 { .compatible = "ti,am43", }, 164 { .compatible = "ti,dra7", }, 165 { .compatible = "ti,omap3", }, 166 { .compatible = "ti,am625", }, 167 168 { .compatible = "qcom,ipq8064", }, 169 { .compatible = "qcom,apq8064", }, 170 { .compatible = "qcom,msm8974", }, 171 { .compatible = "qcom,msm8960", }, 172 173 { } 174 }; 175 176 static bool __init cpu0_node_has_opp_v2_prop(void) 177 { 178 struct device_node *np = of_cpu_device_node_get(0); 179 bool ret = false; 180 181 if (of_get_property(np, "operating-points-v2", NULL)) 182 ret = true; 183 184 of_node_put(np); 185 return ret; 186 } 187 188 static int __init cpufreq_dt_platdev_init(void) 189 { 190 struct device_node *np = of_find_node_by_path("/"); 191 const struct of_device_id *match; 192 const void *data = NULL; 193 194 if (!np) 195 return -ENODEV; 196 197 match = of_match_node(allowlist, np); 198 if (match) { 199 data = match->data; 200 goto create_pdev; 201 } 202 203 if (cpu0_node_has_opp_v2_prop() && !of_match_node(blocklist, np)) 204 goto create_pdev; 205 206 of_node_put(np); 207 return -ENODEV; 208 209 create_pdev: 210 of_node_put(np); 211 return PTR_ERR_OR_ZERO(platform_device_register_data(NULL, "cpufreq-dt", 212 -1, data, 213 sizeof(struct cpufreq_dt_platform_data))); 214 } 215 core_initcall(cpufreq_dt_platdev_init); 216