linux-kernel - Re: [GIT PULL] omap changes for v2.6.39 merge window

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Message-ID: <BANLkTins_YaNYSRc1ryZuRSnGKO2MEemuA@mail.gmail.com>
Date:	Wed, 6 Apr 2011 00:22:15 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Santosh Shilimkar <santosh.shilimkar@...com>
Cc:	david@...g.hm, Russell King - ARM Linux <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nico@...xnic.net>,
	Marc Zyngier <Marc.Zyngier@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	lkml <linux-kernel@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>,
	linux-arm-kernel@...ts.infradead.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-omap@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, Detlef Vollmann <dv@...lmann.ch>,
	David Brown <davidb@...eaurora.org>
Subject: Re: [GIT PULL] omap changes for v2.6.39 merge window

2011/4/5 Santosh Shilimkar <santosh.shilimkar@...com>:

> The only issue I see is the clock-events implemented using
> local timers capabilities in low power modes. The local timers
> won't be able wakeup CPU from DORMANT or OFF state and hence
> you will need an additional wakeup capable clock-event
> working together with the local timers using clock-notifiers.

And this is because the IRQs it emits are local and thus cannot wake
the system? This sounds way backwards... A simple naïve solution
would have been to just route out an external IRQ line back from a
selected timer and into the GIC so it will be able to wake up the
system, right?

Yours,
Linus Walleij
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