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

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Date:	Wed, 2 Dec 2015 10:31:59 +0000
From:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:	Jisheng Zhang <jszhang@...vell.com>
Cc:	sebastian.hesselbarth@...il.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,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: berlin4ct: support cpuidle-dt

On Mon, Nov 30, 2015 at 09:41:58PM +0800, Jisheng Zhang wrote:
> 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(+)

Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>

> 
> 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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