linux-kernel - Re: [PATCH 13/13] arm64: dts: qcom: sc7280: Add cpuidle states

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <e0c008e9-030b-545e-a683-97f1a2bc88e5@codeaurora.org>
Date:   Tue, 23 Feb 2021 17:20:47 +0530
From:   Maulik Shah <mkshah@...eaurora.org>
To:     Stephen Boyd <swboyd@...omium.org>,
        Rajendra Nayak <rnayak@...eaurora.org>, agross@...nel.org,
        bjorn.andersson@...aro.org, robh+dt@...nel.org
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/13] arm64: dts: qcom: sc7280: Add cpuidle states

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