This patch illustrates how to enable mtk-cpufreq driver for a Mediatek SoC in device tree using MT8173 as an example. This patch was tested on MT8173 EVB with several patches which are not yet posted on public mailing list.
Signed-off-by: pi-cheng.chen <[email protected]> --- arch/arm64/boot/dts/mediatek/mt8173-evb.dts | 10 ++++++++++ arch/arm64/boot/dts/mediatek/mt8173.dtsi | 25 +++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/arch/arm64/boot/dts/mediatek/mt8173-evb.dts b/arch/arm64/boot/dts/mediatek/mt8173-evb.dts index b57f095..cc3b954 100644 --- a/arch/arm64/boot/dts/mediatek/mt8173-evb.dts +++ b/arch/arm64/boot/dts/mediatek/mt8173-evb.dts @@ -417,3 +417,13 @@ status = "okay"; clock-frequency = <100000>; }; + +&cpu0 { + cpu-supply = <&mt6397_vpca15_reg>; + voltage-tolerance = <1>; +}; + +&cpu2 { + proc-supply = <&da9211_vcpu_reg>; + sram-supply = <&mt6397_vsramca7_reg>; +}; diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi index dd0a445..4ad75a6 100644 --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi @@ -51,6 +51,16 @@ device_type = "cpu"; compatible = "arm,cortex-a53"; reg = <0x000>; + clocks = <&infracfg INFRA_CA53SEL>; + operating-points = < + 1508000 1109000 + 1404000 1083000 + 1183000 1028000 + 1105000 1009000 + 1001000 983000 + 702000 908000 + 507000 859000 + >; }; cpu1: cpu@1 { @@ -65,6 +75,16 @@ compatible = "arm,cortex-a57"; reg = <0x100>; enable-method = "psci"; + clocks = <&infracfg INFRA_CA57SEL>; + operating-points = < + 1807000 1089000 + 1612000 1049000 + 1404000 1007000 + 1209000 968000 + 1001000 927000 + 702000 867000 + 507000 828000 + >; }; cpu3: cpu@101 { @@ -75,6 +95,11 @@ }; }; + cpufreq { + compatible = "mediatek,mtk-cpufreq"; + clocks = <&apmixedsys APMIXED_MAINPLL>; + }; + psci { compatible = "arm,psci"; method = "smc"; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
