Re: [PATCH] arm64: dts: exynos7: add support for cpuidle core power down

From: Mark Rutland
Date: Wed Oct 15 2014 - 09:03:09 EST


> > + CPU_SLEEP: cpu-sleep {
> > + compatible = "arm,idle-state";
> > + local-timer-stop;
> > + arm,psci-suspend-param = <0x0010000>;
> > + entry-latency-us = <20>;
> > + exit-latency-us = <150>;
> > + min-residency-us = <2100>;
> > + status = "enabled";

While status is a relatively standard property, it's absence implies
everything is OK. There no need for it here as-is.

Additionally, the canonical value is "okay", not "enabled", so this
would fail were we to use of_device_is_available in the idle states
parsing.

> status ? This is not a documented property. If you need it please explain
> why, define its bindings and we can see how to accommodate it.

Do we expect that some idle states won't be available on some boards
built from the same platform?

Mark.
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