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

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Date:	Wed, 06 Apr 2011 12:13:54 +0530
From:	Santosh Shilimkar <santosh.shilimkar@...com>
To:	Linus Walleij <linus.walleij@...aro.org>
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>,
	Stephen Boyd <sboyd@...eaurora.org>
Subject: Re: [GIT PULL] omap changes for v2.6.39 merge window

On 4/6/2011 3:46 AM, Linus Walleij wrote:
> 2011/4/5 Santosh Shilimkar<santosh.shilimkar@...com>:
>> [Me]
>>> (And third it will also eventually need to hook into the timer-based
>>> delay framework that I think Nokia is working on to be really
>>> useful, else all delays become unpredictable.)
>>>
>> Do you mean udelay()/mdelay() here ?
>
> Yes. Stephen Boyd from Qualcomm has floated patches to fix it for the
> ARM architecture, I just pushed him again. We use it in our
> ST-Ericsson products.
>
I remember the post.

> Ideally you'd want that to go along with the A15 timer stuff so that this
> monotonic high-precision timer is also used for udelay()/mdelay().
>
The A15 counter which is always available and running can be used
to emulate this.

Regards
Santosh
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