From: Stefan Krsmanovic stefan.krsmanovic@aggios.com
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 stefan.krsmanovic@aggios.com Acked-by: Will Wong willw@xilinx.com Signed-off-by: Michal Simek michal.simek@xilinx.com ---
arch/arm/dts/zynqmp.dtsi | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi index ab5c243c61d3..f8a2b5fdd930 100644 --- a/arch/arm/dts/zynqmp.dtsi +++ b/arch/arm/dts/zynqmp.dtsi @@ -21,6 +21,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x0>; + cpu-idle-states = <&CPU_SLEEP_0>; };
cpu@1 { @@ -28,6 +29,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x1>; + cpu-idle-states = <&CPU_SLEEP_0>; };
cpu@2 { @@ -35,6 +37,7 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x2>; + cpu-idle-states = <&CPU_SLEEP_0>; };
cpu@3 { @@ -42,6 +45,20 @@ device_type = "cpu"; enable-method = "psci"; reg = <0x3>; + cpu-idle-states = <&CPU_SLEEP_0>; + }; + + idle-states { + entry-mehod = "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 = <800000>; + }; }; };