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Release 4.14 drivers/cpufreq/cpufreq-dt-platdev.c

Directory: drivers/cpufreq
/*
 * Copyright (C) 2016 Linaro.
 * Viresh Kumar <viresh.kumar@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.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 whitelist[] __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 = "fsl,imx7d", },

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

	{ .compatible = "samsung,exynos3250", },
	{ .compatible = "samsung,exynos4210", },
	{ .compatible = "samsung,exynos4212", },
	{ .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,r8a7743", },
	{ .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,r8a7795", },
	{ .compatible = "renesas,r8a7796", },
	{ .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", },

	{ .compatible = "socionext,uniphier-ld6b", },

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

	{ .compatible = "ti,omap2", },
	{ .compatible = "ti,omap3", },
	{ .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 blacklist[] __initconst = {
	{ .compatible = "calxeda,highbank", },
	{ .compatible = "calxeda,ecx-2000", },

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

	{ .compatible = "nvidia,tegra124", },

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

	{ .compatible = "sigma,tango4", },

	{ .compatible = "ti,am33xx", },
	{ .compatible = "ti,am43", },
	{ .compatible = "ti,dra7", },

	{ }
};


static bool __init cpu0_node_has_opp_v2_prop(void) { struct device_node *np = of_cpu_device_node_get(0); bool ret = false; if (of_get_property(np, "operating-points-v2", NULL)) ret = true; of_node_put(np); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Viresh Kumar47100.00%1100.00%
Total47100.00%1100.00%


static int __init cpufreq_dt_platdev_init(void) { struct device_node *np = of_find_node_by_path("/"); const struct of_device_id *match; const void *data = NULL; if (!np) return -ENODEV; match = of_match_node(whitelist, np); if (match) { data = match->data; goto create_pdev; } if (cpu0_node_has_opp_v2_prop() && !of_match_node(blacklist, np)) goto create_pdev; of_node_put(np); return -ENODEV; create_pdev: of_node_put(np); return PTR_ERR_OR_ZERO(platform_device_register_data(NULL, "cpufreq-dt", -1, data, sizeof(struct cpufreq_dt_platform_data))); }

Contributors

PersonTokensPropCommitsCommitProp
Viresh Kumar10689.08%375.00%
Masahiro Yamada1310.92%125.00%
Total119100.00%4100.00%

device_initcall(cpufreq_dt_platdev_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
Viresh Kumar50368.34%1241.38%
Finley Xiao7710.46%26.90%
Linus Walleij425.71%26.90%
Suniel Mahesh212.85%13.45%
Geert Uytterhoeven212.85%26.90%
Masahiro Yamada202.72%26.90%
Robert Jarzmik141.90%13.45%
Khiem Nguyen141.90%26.90%
Tao Wang70.95%13.45%
Hoan Tran70.95%13.45%
Baoyou Xie40.54%13.45%
Wei Yongjun30.41%13.45%
Shubhrajyoti Datta30.41%13.45%
Total736100.00%29100.00%
Directory: drivers/cpufreq
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