Hello Vincent, On Mon, Nov 29, 2010 at 3:19 PM, Vincent Guittot <vincent.guit...@linaro.org > wrote:
> This patch extracts the common code of the cpu hotplug feature across > arm platforms. The goal is to only keep the specific stuff of the > platform in the sub-architecture. I have created a hotplug.c file in > the arm/common directory after studying the cpu hotplug code of > omap2, realview, s5pv310, ux500 and tegra. I have extracted 3 main > platform dependent functions: > -platform_enter_lowpower which prepares the platform for low power. > -platform_do_lowpower on which the cpu will loop until it becomes > really plugged (spurious wake up). This function must returned the cpu > Id in order to leave the unplug state. > -platform_leave_lowpower which restore the platform context. > An ux500 patch is available which uses the common/hotplug.c code. > This patch is quite short because the idle / power down functions are > not yet upstreamed > > I had posted a patch which does exactly the same thing sometime ago, but it got dropped off from the radar. The patch set can be referenced @ http://www.spinics.net/lists/arm-kernel/msg97600.html I remember getting it Acked by most of the platform maintainers, but Russell had some reservations on that. Cheers! --------- The views expressed in this email are my personal ones and do not necessarily echo my employers.
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