linux-kernel - [PATCH v2 4/4] ARM64: dts: mediatek: add cpufreq dts for MT8173 SoC

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Date:	Wed,  4 Mar 2015 16:49:16 +0800
From:	"pi-cheng.chen" <pi-cheng.chen@...aro.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc:	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	"pi-cheng.chen" <pi-cheng.chen@...aro.org>,
	"Joe.C" <yingjoe.chen@...iatek.com>,
	Eddie Huang <eddie.huang@...iatek.com>,
	Howard Chen <ibanezchen@...il.com>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	Mike Turquette <mturquette@...aro.org>, fan.chen@...iatek.com,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linaro-kernel@...ts.linaro.org, linux-mediatek@...ts.infradead.org
Subject: [PATCH v2 4/4] ARM64: dts: mediatek: add cpufreq dts for MT8173 SoC

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 <pi-cheng.chen@...aro.org>
---
 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

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