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SubjectRe: [PATCH v2] arm64: dts: sdm845: Add PSCI cpuidle low power states
On Tue, Oct 30 2018 at 11:23 -0600, Raju P.L.S.S.S.N wrote:
>Add device bindings for cpuidle states for cpu devices.
>
>Cc: <devicetree@vger.kernel.org>
>Signed-off-by: Raju P.L.S.S.S.N <rplsssn@codeaurora.org>
>---
>Changes in v2
> - Address comments from Doug
>---
>---
> arch/arm64/boot/dts/qcom/sdm845.dtsi | 62 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 62 insertions(+)
>
>diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
>index 0c9a2aa..3a8381e 100644
>--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
>+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
>@@ -96,6 +96,7 @@
> reg = <0x0 0x0>;
> enable-method = "psci";
> next-level-cache = <&L2_0>;
>+ cpu-idle-states = <&C0_CPU_PD &C0_CPU_RPD &CLUSTER_PD>;
I think it might be better to use
<&C0_CPU_PD>, <&C0_CPU_RPD>, <&CLUSTER_PD>
> L2_0: l2-cache {
> compatible = "cache";
> next-level-cache = <&L3_0>;
>@@ -111,6 +112,7 @@
> reg = <0x0 0x100>;
> enable-method = "psci";
> next-level-cache = <&L2_100>;
>+ cpu-idle-states = <&C0_CPU_PD &C0_CPU_RPD &CLUSTER_PD>;
> L2_100: l2-cache {
> compatible = "cache";
> next-level-cache = <&L3_0>;
>@@ -123,6 +125,7 @@
> reg = <0x0 0x200>;
> enable-method = "psci";
> next-level-cache = <&L2_200>;
>+ cpu-idle-states = <&C0_CPU_PD &C0_CPU_RPD &CLUSTER_PD>;
> L2_200: l2-cache {
> compatible = "cache";
> next-level-cache = <&L3_0>;
>@@ -135,6 +138,7 @@
> reg = <0x0 0x300>;
> enable-method = "psci";
> next-level-cache = <&L2_300>;
>+ cpu-idle-states = <&C0_CPU_PD &C0_CPU_RPD &CLUSTER_PD>;
> L2_300: l2-cache {
> compatible = "cache";
> next-level-cache = <&L3_0>;
>@@ -147,6 +151,7 @@
> reg = <0x0 0x400>;
> enable-method = "psci";
> next-level-cache = <&L2_400>;
>+ cpu-idle-states = <&C4_CPU_PD &C4_CPU_RPD &CLUSTER_PD>;
> L2_400: l2-cache {
> compatible = "cache";
> next-level-cache = <&L3_0>;
>@@ -159,6 +164,7 @@
> reg = <0x0 0x500>;
> enable-method = "psci";
> next-level-cache = <&L2_500>;
>+ cpu-idle-states = <&C4_CPU_PD &C4_CPU_RPD &CLUSTER_PD>;
> L2_500: l2-cache {
> compatible = "cache";
> next-level-cache = <&L3_0>;
>@@ -171,6 +177,7 @@
> reg = <0x0 0x600>;
> enable-method = "psci";
> next-level-cache = <&L2_600>;
>+ cpu-idle-states = <&C4_CPU_PD &C4_CPU_RPD &CLUSTER_PD>;
> L2_600: l2-cache {
> compatible = "cache";
> next-level-cache = <&L3_0>;
>@@ -183,11 +190,66 @@
> reg = <0x0 0x700>;
> enable-method = "psci";
> next-level-cache = <&L2_700>;
>+ cpu-idle-states = <&C4_CPU_PD &C4_CPU_RPD &CLUSTER_PD>;
> L2_700: l2-cache {
> compatible = "cache";
> next-level-cache = <&L3_0>;
> };
> };
>+
>+ idle-states {
>+ entry-method = "psci";
>+
>+ C0_CPU_PD: c0-power-down {
>+ compatible = "arm,idle-state";
>+ arm,psci-suspend-param = <0x40000003>;
>+ entry-latency-us = <350>;
>+ exit-latency-us = <461>;
>+ min-residency-us = <1890>;
>+ local-timer-stop;
>+ idle-state-name = "power-down";
>+ };
>+
>+ C0_CPU_RPD: c0-rail-power-down {
>+ compatible = "arm,idle-state";
>+ arm,psci-suspend-param = <0x40000004>;
>+ entry-latency-us = <360>;
>+ exit-latency-us = <531>;
>+ min-residency-us = <3934>;
>+ local-timer-stop;
>+ idle-state-name = "rail-power-down";
>+ };
>+
>+ C4_CPU_PD: c4-power-down {
>+ compatible = "arm,idle-state";
>+ arm,psci-suspend-param = <0x40000003>;
>+ entry-latency-us = <264>;
>+ exit-latency-us = <621>;
>+ min-residency-us = <952>;
>+ local-timer-stop;
>+ idle-state-name = "power-down";
>+ };
>+
>+ C4_CPU_RPD: c4-rail-power-down {
>+ compatible = "arm,idle-state";
>+ arm,psci-suspend-param = <0x40000004>;
>+ entry-latency-us = <702>;
>+ exit-latency-us = <1061>;
>+ min-residency-us = <4488>;
>+ local-timer-stop;
>+ idle-state-name = "rail-power-down";
>+ };
>+
>+ CLUSTER_PD: cluster-power-down {
>+ compatible = "arm,idle-state";
>+ arm,psci-suspend-param = <0x400000F4>;
>+ entry-latency-us = <3263>;
>+ exit-latency-us = <6562>;
>+ min-residency-us = <9987>;
>+ local-timer-stop;
>+ idle-state-name = "cluster-power-down";
>+ };
>+ };
> };
>
> pmu {
>--
>QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
>of the Code Aurora Forum, hosted by The Linux Foundation.
>

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