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>
---
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>
