On Wed, Jun 07, 2023 at 01:04:19AM +0200, Konrad Dybcio wrote:
> Add the (scarce) idle states for the individual CPUs, as well as the
> whole cluster. This enables deeper-than-WFI cpuidle
.
>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
FWIW:
Reviewed-by: Stephan Gerhold <stephan@xxxxxxxxxxx>
> ---
> Changes in v2:
> - Add missing BIT(24) ("last in power level")
> - Use the correct CPU low-power state (0x3 instead of 0x4)
> - Link to v1: https://lore.kernel.org/r/20230606-topic-qcm2290_idlestates-v1-1-dd77eef0086e@xxxxxxxxxx
> ---
> arch/arm64/boot/dts/qcom/qcm2290.dtsi | 61 +++++++++++++++++++++++++++++++++++
> 1 file changed, 61 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/qcm2290.dtsi b/arch/arm64/boot/dts/qcom/qcm2290.dtsi
> index b29bc4e4b837..0ed11e80e5e2 100644
> --- a/arch/arm64/boot/dts/qcom/qcm2290.dtsi
> +++ b/arch/arm64/boot/dts/qcom/qcm2290.dtsi
> @@ -48,6 +48,8 @@ CPU0: cpu@0 {
> enable-method = "psci";
> next-level-cache = <&L2_0>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> + power-domains = <&CPU_PD0>;
> + power-domain-names = "psci";
> L2_0: l2-cache {
> compatible = "cache";
> cache-level = <2>;
> @@ -65,6 +67,8 @@ CPU1: cpu@1 {
> enable-method = "psci";
> next-level-cache = <&L2_0>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> + power-domains = <&CPU_PD1>;
> + power-domain-names = "psci";
> };
>
> CPU2: cpu@2 {
> @@ -77,6 +81,8 @@ CPU2: cpu@2 {
> enable-method = "psci";
> next-level-cache = <&L2_0>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> + power-domains = <&CPU_PD2>;
> + power-domain-names = "psci";
> };
>
> CPU3: cpu@3 {
> @@ -89,6 +95,8 @@ CPU3: cpu@3 {
> enable-method = "psci";
> next-level-cache = <&L2_0>;
> qcom,freq-domain = <&cpufreq_hw 0>;
> + power-domains = <&CPU_PD3>;
> + power-domain-names = "psci";
> };
>
> cpu-map {
> @@ -110,6 +118,30 @@ core3 {
> };
> };
> };
> +
> + domain-idle-states {
> + CLUSTER_SLEEP: cluster-sleep-0 {
> + compatible = "domain-idle-state";
> + arm,psci-suspend-param = <0x41000043>;
> + entry-latency-us = <800>;
> + exit-latency-us = <2118>;
> + min-residency-us = <7376>;
> + };
> + };
> +
> + idle-states {
> + entry-method = "psci";
> +
> + CPU_SLEEP: cpu-sleep-0 {
> + compatible = "arm,idle-state";
> + idle-state-name = "power-collapse";
> + arm,psci-suspend-param = <0x40000003>;
> + entry-latency-us = <290>;
> + exit-latency-us = <376>;
> + min-residency-us = <1182>;
> + local-timer-stop;
> + };
> + };
> };
>
> firmware {
> @@ -135,6 +167,35 @@ pmu {
> psci {
> compatible = "arm,psci-1.0";
> method = "smc";
> +
> + CPU_PD0: power-domain-cpu0 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&CPU_SLEEP>;
> + };
> +
> + CPU_PD1: power-domain-cpu1 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&CPU_SLEEP>;
> + };
> +
> + CPU_PD2: power-domain-cpu2 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&CPU_SLEEP>;
> + };
> +
> + CPU_PD3: power-domain-cpu3 {
> + #power-domain-cells = <0>;
> + power-domains = <&CLUSTER_PD>;
> + domain-idle-states = <&CPU_SLEEP>;
> + };
> +
> + CLUSTER_PD: power-domain-cpu-cluster {
> + #power-domain-cells = <0>;
> + domain-idle-states = <&CLUSTER_SLEEP>;
> + };
> };
>
> reserved_memory: reserved-memory {
>
> ---
> base-commit: 6db29e14f4fb7bce9eb5290288e71b05c2b0d118
> change-id: 20230606-topic-qcm2290_idlestates-5b6062b0f4c6
>
> Best regards,
> --
> Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
>
