From: Stefan Krsmanovic <[email protected]> Added the idle-states node to describe zynqmp idle states. Only cpu-sleep-0 idle state is added in this patch. References to the idle-states node are added in all CPU nodes. Time values: entry/exit latencies and min-residency, needs to be tuned. arm,psci-suspend-param is selected to comply with PSCIv1.0 and Extended StateID format.
Signed-off-by: Stefan Krsmanovic <[email protected]> Acked-by: Will Wong <[email protected]> Signed-off-by: Michal Simek <[email protected]> --- arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi index 4f7d9905e235..8e6cf0cf3a69 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi +++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi @@ -25,6 +25,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x0>; + cpu-idle-states = <&CPU_SLEEP_0>; }; cpu1: cpu@1 { @@ -32,6 +33,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x1>; + cpu-idle-states = <&CPU_SLEEP_0>; }; cpu2: cpu@2 { @@ -39,6 +41,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x2>; + cpu-idle-states = <&CPU_SLEEP_0>; }; cpu3: cpu@3 { @@ -46,6 +49,20 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x3>; + cpu-idle-states = <&CPU_SLEEP_0>; + }; + + idle-states { + entry-method = "arm,psci"; + + CPU_SLEEP_0: cpu-sleep-0 { + compatible = "arm,idle-state"; + arm,psci-suspend-param = <0x40000000>; + local-timer-stop; + entry-latency-us = <300>; + exit-latency-us = <600>; + min-residency-us = <10000>; + }; }; }; -- 1.9.1
