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SubjectRe: [PATCH 13/13] arm64: dts: qcom: sc7280: Add cpuidle states
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Hi Stephen,

On 2/23/2021 1:19 PM, Stephen Boyd wrote:
> Quoting Rajendra Nayak (2021-02-11 23:28:50)
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> index 8f2002b..3b86052 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> @@ -186,12 +207,69 @@
>> compatible = "arm,kryo";
>> reg = <0x0 0x700>;
>> enable-method = "psci";
>> + cpu-idle-states = <&BIG_CPU_SLEEP_0
>> + &BIG_CPU_SLEEP_1
>> + &CLUSTER_SLEEP_0>;
>> next-level-cache = <&L2_700>;
>> L2_700: l2-cache {
>> compatible = "cache";
>> next-level-cache = <&L3_0>;
>> };
>> };
>> +
>> + idle-states {
>> + entry-method = "psci";
>> +
>> + LITTLE_CPU_SLEEP_0: cpu-sleep-0-0 {
>> + compatible = "arm,idle-state";
>> + idle-state-name = "little-power-down";
>> + arm,psci-suspend-param = <0x40000003>;
>> + entry-latency-us = <549>;
>> + exit-latency-us = <901>;
>> + min-residency-us = <1774>;
> Are these preliminary numbers? They're the same as sc7180 from what I
> can tell, but presumably things changed between SoC versions?

yes they are preliminary numbers, we are yet to measure on sc7280 and
will update later once measured.

Thanks,
Maulik
>
>> + local-timer-stop;
>> + };
>> +
>> + LITTLE_CPU_SLEEP_1: cpu-sleep-0-1 {
>> + compatible = "arm,idle-state";
>> + idle-state-name = "little-rail-power-down";
>> + arm,psci-suspend-param = <0x40000004>;
>> + entry-latency-us = <702>;
>> + exit-latency-us = <915>;
>> + min-residency-us = <4001>;
>> + local-timer-stop;
>> + };
>> +
>> + BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
>> + compatible = "arm,idle-state";
>> + idle-state-name = "big-power-down";
>> + arm,psci-suspend-param = <0x40000003>;
>> + entry-latency-us = <523>;
>> + exit-latency-us = <1244>;
>> + min-residency-us = <2207>;

--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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