drivers/cpufreq/cpufreq-dt-platdev.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2016 Linaro.
 * Viresh Kumar <viresh.kumar@linaro.org>
 */

#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>

#include "cpufreq-dt.h"

/*
 * Machines for which the cpufreq device is *always* created, mostly used for
 * platforms using "operating-points" (V1) property.
 */
static const struct of_device_id allowlist[] __initconst = {
	{ .compatible = "allwinner,sun4i-a10", },
	{ .compatible = "allwinner,sun5i-a10s", },
	{ .compatible = "allwinner,sun5i-a13", },
	{ .compatible = "allwinner,sun5i-r8", },
	{ .compatible = "allwinner,sun6i-a31", },
	{ .compatible = "allwinner,sun6i-a31s", },
	{ .compatible = "allwinner,sun7i-a20", },
	{ .compatible = "allwinner,sun8i-a23", },
	{ .compatible = "allwinner,sun8i-a83t", },
	{ .compatible = "allwinner,sun8i-h3", },

	{ .compatible = "apm,xgene-shadowcat", },

	{ .compatible = "arm,integrator-ap", },
	{ .compatible = "arm,integrator-cp", },

	{ .compatible = "hisilicon,hi3660", },

	{ .compatible = "fsl,imx27", },
	{ .compatible = "fsl,imx51", },
	{ .compatible = "fsl,imx53", },

	{ .compatible = "marvell,berlin", },
	{ .compatible = "marvell,pxa250", },
	{ .compatible = "marvell,pxa270", },

	{ .compatible = "samsung,exynos3250", },
	{ .compatible = "samsung,exynos4210", },
	{ .compatible = "samsung,exynos5250", },
#ifndef CONFIG_BL_SWITCHER
	{ .compatible = "samsung,exynos5800", },
#endif

	{ .compatible = "renesas,emev2", },
	{ .compatible = "renesas,r7s72100", },
	{ .compatible = "renesas,r8a73a4", },
	{ .compatible = "renesas,r8a7740", },
	{ .compatible = "renesas,r8a7742", },
	{ .compatible = "renesas,r8a7743", },
	{ .compatible = "renesas,r8a7744", },
	{ .compatible = "renesas,r8a7745", },
	{ .compatible = "renesas,r8a7778", },
	{ .compatible = "renesas,r8a7779", },
	{ .compatible = "renesas,r8a7790", },
	{ .compatible = "renesas,r8a7791", },
	{ .compatible = "renesas,r8a7792", },
	{ .compatible = "renesas,r8a7793", },
	{ .compatible = "renesas,r8a7794", },
	{ .compatible = "renesas,sh73a0", },

	{ .compatible = "rockchip,rk2928", },
	{ .compatible = "rockchip,rk3036", },
	{ .compatible = "rockchip,rk3066a", },
	{ .compatible = "rockchip,rk3066b", },
	{ .compatible = "rockchip,rk3188", },
	{ .compatible = "rockchip,rk3228", },
	{ .compatible = "rockchip,rk3288", },
	{ .compatible = "rockchip,rk3328", },
	{ .compatible = "rockchip,rk3366", },
	{ .compatible = "rockchip,rk3368", },
	{ .compatible = "rockchip,rk3399",
	  .data = &(struct cpufreq_dt_platform_data)
		{ .have_governor_per_policy = true, },
	},

	{ .compatible = "st-ericsson,u8500", },
	{ .compatible = "st-ericsson,u8540", },
	{ .compatible = "st-ericsson,u9500", },
	{ .compatible = "st-ericsson,u9540", },

	{ .compatible = "starfive,jh7110", },

	{ .compatible = "ti,omap2", },
	{ .compatible = "ti,omap4", },
	{ .compatible = "ti,omap5", },

	{ .compatible = "xlnx,zynq-7000", },
	{ .compatible = "xlnx,zynqmp", },

	{ }
};

/*
 * Machines for which the cpufreq device is *not* created, mostly used for
 * platforms using "operating-points-v2" property.
 */
static const struct of_device_id blocklist[] __initconst = {
	{ .compatible = "allwinner,sun50i-h6", },
	{ .compatible = "allwinner,sun50i-h616", },
	{ .compatible = "allwinner,sun50i-h618", },
	{ .compatible = "allwinner,sun50i-h700", },

	{ .compatible = "apple,arm-platform", },

	{ .compatible = "arm,vexpress", },

	{ .compatible = "calxeda,highbank", },
	{ .compatible = "calxeda,ecx-2000", },

	{ .compatible = "fsl,imx7ulp", },
	{ .compatible = "fsl,imx7d", },
	{ .compatible = "fsl,imx7s", },
	{ .compatible = "fsl,imx8mq", },
	{ .compatible = "fsl,imx8mm", },
	{ .compatible = "fsl,imx8mn", },
	{ .compatible = "fsl,imx8mp", },

	{ .compatible = "marvell,armadaxp", },

	{ .compatible = "mediatek,mt2701", },
	{ .compatible = "mediatek,mt2712", },
	{ .compatible = "mediatek,mt7622", },
	{ .compatible = "mediatek,mt7623", },
	{ .compatible = "mediatek,mt8167", },
	{ .compatible = "mediatek,mt817x", },
	{ .compatible = "mediatek,mt8173", },
	{ .compatible = "mediatek,mt8176", },
	{ .compatible = "mediatek,mt8183", },
	{ .compatible = "mediatek,mt8186", },
	{ .compatible = "mediatek,mt8365", },
	{ .compatible = "mediatek,mt8516", },

	{ .compatible = "nvidia,tegra20", },
	{ .compatible = "nvidia,tegra30", },
	{ .compatible = "nvidia,tegra124", },
	{ .compatible = "nvidia,tegra210", },
	{ .compatible = "nvidia,tegra234", },

	{ .compatible = "qcom,apq8096", },
	{ .compatible = "qcom,msm8909", },
	{ .compatible = "qcom,msm8996", },
	{ .compatible = "qcom,msm8998", },
	{ .compatible = "qcom,qcm2290", },
	{ .compatible = "qcom,qcm6490", },
	{ .compatible = "qcom,qcs404", },
	{ .compatible = "qcom,qdu1000", },
	{ .compatible = "qcom,sa8155p" },
	{ .compatible = "qcom,sa8540p" },
	{ .compatible = "qcom,sa8775p" },
	{ .compatible = "qcom,sc7180", },
	{ .compatible = "qcom,sc7280", },
	{ .compatible = "qcom,sc8180x", },
	{ .compatible = "qcom,sc8280xp", },
	{ .compatible = "qcom,sdm670", },
	{ .compatible = "qcom,sdm845", },
	{ .compatible = "qcom,sdx75", },
	{ .compatible = "qcom,sm6115", },
	{ .compatible = "qcom,sm6350", },
	{ .compatible = "qcom,sm6375", },
	{ .compatible = "qcom,sm7225", },
	{ .compatible = "qcom,sm7325", },
	{ .compatible = "qcom,sm8150", },
	{ .compatible = "qcom,sm8250", },
	{ .compatible = "qcom,sm8350", },
	{ .compatible = "qcom,sm8450", },
	{ .compatible = "qcom,sm8550", },

	{ .compatible = "st,stih407", },
	{ .compatible = "st,stih410", },
	{ .compatible = "st,stih418", },

	{ .compatible = "ti,am33xx", },
	{ .compatible = "ti,am43", },
	{ .compatible = "ti,dra7", },
	{ .compatible = "ti,omap3", },
	{ .compatible = "ti,am625", },
	{ .compatible = "ti,am62a7", },
	{ .compatible = "ti,am62p5", },

	{ .compatible = "qcom,ipq5332", },
	{ .compatible = "qcom,ipq6018", },
	{ .compatible = "qcom,ipq8064", },
	{ .compatible = "qcom,ipq8074", },
	{ .compatible = "qcom,ipq9574", },
	{ .compatible = "qcom,apq8064", },
	{ .compatible = "qcom,msm8974", },
	{ .compatible = "qcom,msm8960", },

	{ }
};

static bool __init cpu0_node_has_opp_v2_prop(void)
{
	struct device_node *np __free(device_node) = of_cpu_device_node_get(0);
	bool ret = false;

	if (of_property_present(np, "operating-points-v2"))
		ret = true;

	return ret;
}

static int __init cpufreq_dt_platdev_init(void)
{
	struct device_node *np __free(device_node) = of_find_node_by_path("/");
	const struct of_device_id *match;
	const void *data = NULL;

	if (!np)
		return -ENODEV;

	match = of_match_node(allowlist, np);
	if (match) {
		data = match->data;
		goto create_pdev;
	}

	if (cpu0_node_has_opp_v2_prop() && !of_match_node(blocklist, np))
		goto create_pdev;

	return -ENODEV;

create_pdev:
	return PTR_ERR_OR_ZERO(platform_device_register_data(NULL, "cpufreq-dt",
			       -1, data,
			       sizeof(struct cpufreq_dt_platform_data)));
}
core_initcall(cpufreq_dt_platdev_init);
MODULE_DESCRIPTION("Generic DT based cpufreq platdev driver");
MODULE_LICENSE("GPL");