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ARM: dts: imx7s: enable cpuidle driver

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Enable cpuidle for i.MX7S/D using generic ARM cpuidle
driver, below 2 idle states enabled:

1. ARM WFI;
2. SoC WAIT mode.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Anson Huang 2018-09-03 09:45:41 +08:00 committed by Shawn Guo
parent f5d5d2e6c6
commit 6f4ec8842d
2 changed files with 15 additions and 0 deletions
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1
arch/arm/boot/dts/imx7d.dtsi
View File

@ -20,6 +20,7 @@
reg = <1>;
clock-frequency = <996000000>;
operating-points-v2 = <&cpu0_opp_table>;
cpu-idle-states = <&cpu_sleep_wait>;
};
};

14
arch/arm/boot/dts/imx7s.dtsi
View File

@ -54,6 +54,19 @@
#address-cells = <1>;
#size-cells = <0>;
idle-states {
entry-method = "psci";
cpu_sleep_wait: cpu-sleep-wait {
compatible = "arm,idle-state";
arm,psci-suspend-param = <0x0010000>;
local-timer-stop;
entry-latency-us = <100>;
exit-latency-us = <50>;
min-residency-us = <1000>;
};
};
cpu0: cpu@0 {
compatible = "arm,cortex-a7";
device_type = "cpu";
@ -61,6 +74,7 @@
clock-frequency = <792000000>;
clock-latency = <61036>; /* two CLK32 periods */
clocks = <&clks IMX7D_CLK_ARM>;
cpu-idle-states = <&cpu_sleep_wait>;
};
};