Add C-States and the respective residencies supported by the QCOM 8974
chipset. Current support is for WFI (clock gating) and Standlone-PC
(power down of the core).
Signed-off-by: Lina Iyer <lina.i...@linaro.org>
---
arch/arm/boot/dts/qcom-msm8974-pm.dtsi | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/arch/arm/boot/dts/qcom-msm8974-pm.dtsi
b/arch/arm/boot/dts/qcom-msm8974-pm.dtsi
index 8fe00f1..4e3c206 100644
--- a/arch/arm/boot/dts/qcom-msm8974-pm.dtsi
+++ b/arch/arm/boot/dts/qcom-msm8974-pm.dtsi
@@ -122,4 +122,25 @@
qcom,cpu-alias-addr = <0x10000>;
qcom,sleep-status-mask= <0x80000>;
};
+
+ qcom,cpuidle {
+ compatible = "qcom,cpuidle";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ qcom,cpu-level@0 {
+ reg = <0x0>;
+ qcom,state-name = "C1";
+ qcom,spm-cpu-mode = "wfi";
+ qcom,latency-us = <1>;
+ qcom,residency-us = <1>;
+ };
+
+ qcom,cpu-level@2 {
+ reg = <0x1>;
+ qcom,state-name = "C2";
+ qcom,spm-cpu-mode = "standalone_pc";
+ qcom,latency-us = <300>;
+ qcom,residency-us = <2000>;
+ };
+ };
};
--
1.9.1
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