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