mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-29 22:02:02 +00:00
6286bbb405
This driver implements CPU frequency scaling for Apple Silicon SoCs, including M1 (t8103), M1 Max/Pro/Ultra (t600x), and M2 (t8112). Each CPU cluster has its own register set, and frequency management is fully automated by the hardware; the driver only has to write one register. There is boost frequency support, but the hardware will only allow their use if only a subset of cores in a cluster are in non-deep-idle. Since we don't support deep idle yet, these frequencies are not achievable, but the driver supports them. They will remain disabled in the device tree until deep idle is implemented, to avoid confusing users. This driver does not yet implement the memory controller performance state tuning that usually accompanies higher CPU p-states. This will be done in a future patch. Acked-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Hector Martin <marcan@marcan.st> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
214 lines
5.9 KiB
C
214 lines
5.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2016 Linaro.
|
|
* Viresh Kumar <viresh.kumar@linaro.org>
|
|
*/
|
|
|
|
#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 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 = "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 = "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 = "qcom,apq8096", },
|
|
{ .compatible = "qcom,msm8996", },
|
|
{ .compatible = "qcom,qcs404", },
|
|
{ .compatible = "qcom,sa8155p" },
|
|
{ .compatible = "qcom,sa8540p" },
|
|
{ .compatible = "qcom,sc7180", },
|
|
{ .compatible = "qcom,sc7280", },
|
|
{ .compatible = "qcom,sc8180x", },
|
|
{ .compatible = "qcom,sc8280xp", },
|
|
{ .compatible = "qcom,sdm845", },
|
|
{ .compatible = "qcom,sm6115", },
|
|
{ .compatible = "qcom,sm6350", },
|
|
{ .compatible = "qcom,sm8150", },
|
|
{ .compatible = "qcom,sm8250", },
|
|
{ .compatible = "qcom,sm8350", },
|
|
|
|
{ .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 = "qcom,ipq8064", },
|
|
{ .compatible = "qcom,apq8064", },
|
|
{ .compatible = "qcom,msm8974", },
|
|
{ .compatible = "qcom,msm8960", },
|
|
|
|
{ }
|
|
};
|
|
|
|
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;
|
|
}
|
|
|
|
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(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;
|
|
|
|
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)));
|
|
}
|
|
core_initcall(cpufreq_dt_platdev_init);
|