linux-kernel - Re: [PATCH] arm64: dts: mediatek: Add cpuidle support for MT2712

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Date:   Tue, 10 Oct 2017 19:04:30 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     James Liao <jamesjj.liao@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     devicetree@...r.kernel.org, srv_heupstream@...iatek.com,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm64: dts: mediatek: Add cpuidle support for MT2712



On 08/31/2017 07:44 AM, James Liao wrote:
> Add CPU idle state nodes to enable C1/C2 idle states.
> 
> Signed-off-by: James Liao <jamesjj.liao@...iatek.com>
> ---

pushed to v4.14-next/dts64

Thanks.

> This patch bases on latest Matthias v4.13-next/dts64 branch [1],
> add CPU idle states for MT2712.
> 
> [1] https://github.com/mbgg/linux-mediatek.git
> 
>   arch/arm64/boot/dts/mediatek/mt2712e.dtsi | 25 +++++++++++++++++++++++++
>   1 file changed, 25 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt2712e.dtsi b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
> index 57d0396..5d4e406 100644
> --- a/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
> @@ -39,6 +39,7 @@
>   			device_type = "cpu";
>   			compatible = "arm,cortex-a35";
>   			reg = <0x000>;
> +			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
>   		};
>   
>   		cpu1: cpu@1 {
> @@ -46,6 +47,7 @@
>   			compatible = "arm,cortex-a35";
>   			reg = <0x001>;
>   			enable-method = "psci";
> +			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
>   		};
>   
>   		cpu2: cpu@200 {
> @@ -53,6 +55,29 @@
>   			compatible = "arm,cortex-a72";
>   			reg = <0x200>;
>   			enable-method = "psci";
> +			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
> +		};
> +
> +		idle-states {
> +			entry-method = "arm,psci";
> +
> +			CPU_SLEEP_0: cpu-sleep-0 {
> +				compatible = "arm,idle-state";
> +				local-timer-stop;
> +				entry-latency-us = <100>;
> +				exit-latency-us = <80>;
> +				min-residency-us = <2000>;
> +				arm,psci-suspend-param = <0x0010000>;
> +			};
> +
> +			CLUSTER_SLEEP_0: cluster-sleep-0 {
> +				compatible = "arm,idle-state";
> +				local-timer-stop;
> +				entry-latency-us = <350>;
> +				exit-latency-us = <80>;
> +				min-residency-us = <3000>;
> +				arm,psci-suspend-param = <0x1010000>;
> +			};
>   		};
>   	};
>   
>