linux-kernel - Re: [PATCH] ARM: twd: Adjust localtimer frequency with cpufreq notifiers

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Message-ID: <4D70BE9D.4000507@stericsson.com>
Date:	Fri, 4 Mar 2011 11:27:41 +0100
From:	martin persson <martin.persson@...ricsson.com>
To:	Linus Walleij <linus.ml.walleij@...il.com>
Cc:	Colin Cross <ccross@...roid.com>,
	"linux-arm-kernel@...ts-infradead.org" 
	<linux-arm-kernel@...ts-infradead.org>,
	Harald Gustafsson <harald.gustafsson@...csson.com>,
	Rickard ANDERSSON <rickard.andersson@...ricsson.com>,
	Rob Herring <robherring2@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Srinidhi KASAGAR <srinidhi.kasagar@...ricsson.com>,
	Varun Swara <Varun.Swara@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: twd: Adjust localtimer frequency with cpufreq notifiers

We've seen no problems using this patch and have been grateful for it's existence. So I'm happy to put:

Tested-by: martin.persson@...ricsson.com

/Martin

On 03/04/2011 11:17 AM, Linus Walleij wrote:
> 2010/11/18 Colin Cross<ccross@...roid.com>:
>
>> The clock to the ARM TWD local timer scales with the cpu
>> frequency. To allow the cpu frequency to change while
>> maintaining a constant TWD frequency, pick a lower target
>> frequency for the TWD and use the prescaler to divide down
>> to the closest lower frequency.
> We are using this with some custom hooks for the U8500.
>
> Tested-by: Linus Walleij<linus.walleij@...aro.org>
>
> Martin Persson can probably provide an additional Tested-by
> from ST-Ericsson if it helps.
>
> Colin are you merging this patch for 2.6.39 through
> Russells tracker or pull request? It's an important patch
> for us.
>
> Yours,
> Linus Walleij
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