Add allowable C-States for each cpu using the cpu-idle-states node.
Support Standby and Standalone power collapse (power down that does not
affect any SoC idle states) for each cpu.
Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
---
arch/arm/boot/dts/qcom-msm8974.dtsi | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/arch/arm/boot/dts/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom-msm8974.dtsi
index 80a4467..e68b40f 100644
--- a/arch/arm/boot/dts/qcom-msm8974.dtsi
+++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
@@ -22,6 +22,7 @@
next-level-cache = <&L2>;
qcom,acc = <&acc0>;
qcom,saw = <&saw0>;
+ cpu-idle-states = <&CPU_STBY &CPU_SPC>;
};
cpu@1 {
@@ -32,6 +33,7 @@
next-level-cache = <&L2>;
qcom,acc = <&acc1>;
qcom,saw = <&saw1>;
+ cpu-idle-states = <&CPU_STBY &CPU_SPC>;
};
cpu@2 {
@@ -42,6 +44,7 @@
next-level-cache = <&L2>;
qcom,acc = <&acc2>;
qcom,saw = <&saw2>;
+ cpu-idle-states = <&CPU_STBY &CPU_SPC>;
};
cpu@3 {
@@ -52,6 +55,7 @@
next-level-cache = <&L2>;
qcom,acc = <&acc3>;
qcom,saw = <&saw3>;
+ cpu-idle-states = <&CPU_STBY &CPU_SPC>;
};
L2: l2-cache {
@@ -59,6 +63,22 @@
cache-level = <2>;
qcom,saw = <&saw_l2>;
};
+
+ idle-states {
+ CPU_STBY: standby {
+ compatible = "qcom,idle-state-stby", "arm,idle-state";
+ entry-latency-us = <1>;
+ exit-latency-us = <1>;
+ min-residency-us = <2>;
+ };
+
+ CPU_SPC: spc {
+ compatible = "qcom,idle-state-spc", "arm,idle-state";
+ entry-latency-us = <150>;
+ exit-latency-us = <200>;
+ min-residency-us = <2000>;
+ };
+ };
};
cpu-pmu {
--
2.1.0
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