[PATCH v2 4/4] ARM64: dts: mediatek: add cpufreq dts for MT8173 SoC
From: pi-cheng.chen <hidden>
Date: 2015-03-04 08:50:09
Also in:
linux-devicetree, linux-pm, lkml
Subsystem:
arm/mediatek soc support, the rest · Maintainers:
Matthias Brugger, AngeloGioacchino Del Regno, Linus Torvalds
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 <redacted> --- 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 at 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 at 101 {
@@ -75,6 +95,11 @@ }; }; + cpufreq { + compatible = "mediatek,mtk-cpufreq"; + clocks = <&apmixedsys APMIXED_MAINPLL>; + }; + psci { compatible = "arm,psci"; method = "smc";
--
1.9.1