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SubjectRe: [PATCH v2] arm64: dts: mt8183: Enable CPU idle-states
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On 14/01/2020 11:11, James Liao wrote:
> Enable mcdi-cpu and mcdi-cluster on MT8183 CPUs.
>
> Signed-off-by: James Liao <jamesjj.liao@mediatek.com>
> ---
> This patch bases on v5.5-rc6, adds idle-states for MT8183 CPUs.
>
> arch/arm64/boot/dts/mediatek/mt8183.dtsi | 30 ++++++++++++++++++++++++++++++
> 1 file changed, 30 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> index 10b3247..a022325 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> @@ -73,6 +73,7 @@
> reg = <0x000>;
> enable-method = "psci";
> capacity-dmips-mhz = <741>;
> + cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
> };
>
> cpu1: cpu@1 {
> @@ -81,6 +82,7 @@
> reg = <0x001>;
> enable-method = "psci";
> capacity-dmips-mhz = <741>;
> + cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
> };
>
> cpu2: cpu@2 {
> @@ -89,6 +91,7 @@
> reg = <0x002>;
> enable-method = "psci";
> capacity-dmips-mhz = <741>;
> + cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
> };
>
> cpu3: cpu@3 {
> @@ -97,6 +100,7 @@
> reg = <0x003>;
> enable-method = "psci";
> capacity-dmips-mhz = <741>;
> + cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
> };
>
> cpu4: cpu@100 {
> @@ -105,6 +109,7 @@
> reg = <0x100>;
> enable-method = "psci";
> capacity-dmips-mhz = <1024>;
> + cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
> };
>
> cpu5: cpu@101 {
> @@ -113,6 +118,7 @@
> reg = <0x101>;
> enable-method = "psci";
> capacity-dmips-mhz = <1024>;
> + cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
> };
>
> cpu6: cpu@102 {
> @@ -121,6 +127,7 @@
> reg = <0x102>;
> enable-method = "psci";
> capacity-dmips-mhz = <1024>;
> + cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
> };
>
> cpu7: cpu@103 {
> @@ -129,6 +136,29 @@
> reg = <0x103>;
> enable-method = "psci";
> capacity-dmips-mhz = <1024>;
> + cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
> + };
> +
> + idle-states {
> + entry-method = "arm,psci";

reading idle-states.txt the entry-method should be "psci".

> +
> + MCDI_CPU: mcdi-cpu {

I wonder what MCDI stands for. Normally we have CPU_SLEEP and CLUSTER_SLEEP here.

Regards,
Matthias

> + compatible = "arm,idle-state";
> + local-timer-stop;
> + arm,psci-suspend-param = <0x00010001>;
> + entry-latency-us = <200>;
> + exit-latency-us = <200>;
> + min-residency-us = <800>;
> + };
> +
> + MCDI_CLUSTER: mcdi-cluster {
> + compatible = "arm,idle-state";
> + local-timer-stop;
> + arm,psci-suspend-param = <0x01010001>;
> + entry-latency-us = <250>;
> + exit-latency-us = <400>;
> + min-residency-us = <1300>;
> + };
> };
> };
>
>

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