From: Yuantian Tang <andy.tang@xxxxxxx>
ls1088a supports another cpu idle state which is ph20 which saves
more power when cpu is idle.
It was implemented through psci firmware.
Signed-off-by: Tang Yuantian <andy.tang@xxxxxxx>
---
v2:
-- no change
arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
index c144d06..adc1ff5 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
@@ -62,6 +62,7 @@
compatible = "arm,cortex-a53";
reg = <0x0>;
clocks = <&clockgen 1 0>;
+ cpu-idle-states = <&CPU_PH20>;
#cooling-cells = <2>;
};
@@ -70,6 +71,7 @@
compatible = "arm,cortex-a53";
reg = <0x1>;
clocks = <&clockgen 1 0>;
+ cpu-idle-states = <&CPU_PH20>;
};
cpu2: cpu@2 {
@@ -77,6 +79,7 @@
compatible = "arm,cortex-a53";
reg = <0x2>;
clocks = <&clockgen 1 0>;
+ cpu-idle-states = <&CPU_PH20>;
};
cpu3: cpu@3 {
@@ -84,6 +87,7 @@
compatible = "arm,cortex-a53";
reg = <0x3>;
clocks = <&clockgen 1 0>;
+ cpu-idle-states = <&CPU_PH20>;
};
cpu4: cpu@100 {
@@ -91,6 +95,7 @@
compatible = "arm,cortex-a53";
reg = <0x100>;
clocks = <&clockgen 1 1>;
+ cpu-idle-states = <&CPU_PH20>;
#cooling-cells = <2>;
};
@@ -99,6 +104,7 @@
compatible = "arm,cortex-a53";
reg = <0x101>;
clocks = <&clockgen 1 1>;
+ cpu-idle-states = <&CPU_PH20>;
};
cpu6: cpu@102 {
@@ -106,6 +112,7 @@
compatible = "arm,cortex-a53";
reg = <0x102>;
clocks = <&clockgen 1 1>;
+ cpu-idle-states = <&CPU_PH20>;
};
cpu7: cpu@103 {
@@ -113,6 +120,16 @@
compatible = "arm,cortex-a53";
reg = <0x103>;
clocks = <&clockgen 1 1>;
+ cpu-idle-states = <&CPU_PH20>;
+ };
+
+ CPU_PH20: cpu-ph20 {
+ compatible = "arm,idle-state";
+ idle-state-name = "PH20";
+ arm,psci-suspend-param = <0x00010000>;
+ entry-latency-us = <1000>;
+ exit-latency-us = <1000>;
+ min-residency-us = <3000>;
};
};
@@ -136,6 +153,11 @@
<1 10 IRQ_TYPE_LEVEL_LOW>;/* Hypervisor PPI */
};
+ psci {
+ compatible = "arm,psci-0.2";
+ method = "smc";
+ };
+
sysclk: sysclk {
compatible = "fixed-clock";
#clock-cells = <0>;
--
2.1.0.27.g96db324
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