Define power domain and the power states for the domain as defined by
the PSCI firmware. The 8916 firmware supports OS initiated method of
powering off the CPU clusters.
Cc: <devicetree@xxxxxxxxxxxxxxx>
Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/msm8916.dtsi | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 3029773..506c712 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -64,6 +64,7 @@
next-level-cache = <&L2_0>;
enable-method = "psci";
cpu-idle-states = <&CPU_SPC>;
+ power-domains = <&CPU_PD>;
};
CPU1: cpu@1 {
@@ -73,6 +74,7 @@
next-level-cache = <&L2_0>;
enable-method = "psci";
cpu-idle-states = <&CPU_SPC>;
+ power-domains = <&CPU_PD>;
};
CPU2: cpu@2 {
@@ -82,6 +84,7 @@
next-level-cache = <&L2_0>;
enable-method = "psci";
cpu-idle-states = <&CPU_SPC>;
+ power-domains = <&CPU_PD>;
};
CPU3: cpu@3 {
@@ -91,6 +94,7 @@
next-level-cache = <&L2_0>;
enable-method = "psci";
cpu-idle-states = <&CPU_SPC>;
+ power-domains = <&CPU_PD>;
};
L2_0: l2-cache {
@@ -107,12 +111,33 @@
min-residency-us = <2000>;
local-timer-stop;
};
+
+ CLUSTER_RET: cluster_retention {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x1000010>;
+ entry-latency-us = <500>;
+ exit-latency-us = <500>;
+ min-residency-us = <2000>;
+ };
+
+ CLUSTER_PWR_DWN: cluster_gdhs {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x1000030>;
+ entry-latency-us = <2000>;
+ exit-latency-us = <2000>;
+ min-residency-us = <6000>;
+ };
};
};
psci {
compatible = "arm,psci-1.0";
method = "smc";
+
+ CPU_PD: cpu-pd@0 {
+ #power-domain-cells = <0>;
+ domain-idle-states = <&CLUSTER_RET>, <&CLUSTER_PWR_DWN>;
+ };
};
timer {
--
2.7.4
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