From 1e4e25c8ae8f05ab8634ade3b848a4c1d95cef53 Mon Sep 17 00:00:00 2001 From: Stefan Krsmanovic Date: Fri, 21 Oct 2016 12:44:56 +0200 Subject: [PATCH] arm64: zynqmp: Add idle state for ZynqMP Added the idle-states node to describe zynqmp idle states. Only cpu-sleep-0 idle state is added in this patch. References to the idle-states node are added in all CPU nodes. Time values: entry/exit latencies and min-residency, needs to be tuned. arm,psci-suspend-param is selected to comply with PSCIv1.0 and Extended StateID format. Signed-off-by: Stefan Krsmanovic Acked-by: Will Wong Signed-off-by: Michal Simek --- arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi index 4f7d990..8e6cf0c 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi +++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi @@ -25,6 +25,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x0>; + cpu-idle-states = <&CPU_SLEEP_0>; }; cpu1: cpu@1 { @@ -32,6 +33,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x1>; + cpu-idle-states = <&CPU_SLEEP_0>; }; cpu2: cpu@2 { @@ -39,6 +41,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x2>; + cpu-idle-states = <&CPU_SLEEP_0>; }; cpu3: cpu@3 { @@ -46,6 +49,20 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x3>; + cpu-idle-states = <&CPU_SLEEP_0>; + }; + + idle-states { + entry-method = "arm,psci"; + + CPU_SLEEP_0: cpu-sleep-0 { + compatible = "arm,idle-state"; + arm,psci-suspend-param = <0x40000000>; + local-timer-stop; + entry-latency-us = <300>; + exit-latency-us = <600>; + min-residency-us = <10000>; + }; }; }; -- 2.7.4