linux-kernel - [PATCH] arm64: dts: berlin4ct: support cpuidle-dt

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Date:	Mon, 30 Nov 2015 21:41:58 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	<sebastian.hesselbarth@...il.com>, <lorenzo.pieralisi@....com>,
	<daniel.lezcano@...aro.org>, <will.deacon@....com>,
	<catalin.marinas@....com>, <robh+dt@...nel.org>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>
CC:	<devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Jisheng Zhang <jszhang@...vell.com>
Subject: [PATCH] arm64: dts: berlin4ct: support cpuidle-dt

This patch adds an idle-states node to describe the berlin4ct idle
states and also adds references to the idle-states node in all CPU
nodes. After this patch cpuidle is enabled.

Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
---
 arch/arm64/boot/dts/marvell/berlin4ct.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
index 39d0676..3649cea 100644
--- a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
+++ b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
@@ -69,6 +69,7 @@
 			device_type = "cpu";
 			reg = <0x0>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_0>;
 		};
 
 		cpu1: cpu@1 {
@@ -76,6 +77,7 @@
 			device_type = "cpu";
 			reg = <0x1>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_0>;
 		};
 
 		cpu2: cpu@2 {
@@ -83,6 +85,7 @@
 			device_type = "cpu";
 			reg = <0x2>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_0>;
 		};
 
 		cpu3: cpu@3 {
@@ -90,6 +93,19 @@
 			device_type = "cpu";
 			reg = <0x3>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_0>;
+		};
+
+		idle-states {
+			entry-method = "psci";
+			CPU_SLEEP_0: cpu-sleep-0 {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x0010000>;
+				entry-latency-us = <75>;
+				exit-latency-us = <155>;
+				min-residency-us = <1000>;
+			};
 		};
 	};
 
-- 
2.6.2

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