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ARM64: zynqmp: Add idle state for ZynqMP

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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>
This commit is contained in:
Stefan Krsmanovic 2016-10-21 12:44:56 +02:00 committed by Michal Simek
parent 8925e5996d
commit 2e15b071a2
1 changed files with 17 additions and 0 deletions
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17
arch/arm/dts/zynqmp.dtsi
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@ -22,6 +22,7 @@
device_type = "cpu";
enable-method = "psci";
reg = <0x0>;
cpu-idle-states = <&CPU_SLEEP_0>;
};
cpu@1 {
@ -29,6 +30,7 @@
device_type = "cpu";
enable-method = "psci";
reg = <0x1>;
cpu-idle-states = <&CPU_SLEEP_0>;
};
cpu@2 {
@ -36,6 +38,7 @@
device_type = "cpu";
enable-method = "psci";
reg = <0x2>;
cpu-idle-states = <&CPU_SLEEP_0>;
};
cpu@3 {
@ -43,6 +46,20 @@
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>;
};
};
};