linux-kernel - Re: Nokia N900: Proper C-states

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Message-ID: <20160215101054.GB1476@pali>
Date:	Mon, 15 Feb 2016 11:10:54 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Jean Pihet <j-pihet@...com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Kevin Hilman <khilman@...com>, Nishanth Menon <nm@...com>,
	Pavel Machel <pavel@....cz>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Sebastian Reichel <sre@...nel.org>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>
Subject: Re: Nokia N900: Proper C-states

On Thursday 11 February 2016 09:47:50 Tony Lindgren wrote:
> * Pali Rohár <pali.rohar@...il.com> [160211 07:03]:
> > > On 02/09/2016 04:56 PM, Tony Lindgren wrote:
> > > >I'm almost certain those values are not n900 specific but should be
> > > >used for omap3430 in general.
> > 
> > cpuidle parameters for Nokia N900 were added by this commit:
> > 
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5a1b1d3a9efad6bd53d01ff02e86626d1a51d697
> > 
> > which says:
> > 
> > Numbers based on measurements made in October 2009 for PM optimized
> > kernel with CPU freq enabled.
> > 
> > Tony, do you have any other omap3430 device?
> 
> Yes I can make sure it works for omap3-ldp for a minimal case.
> That's a 3430 ES 3.0 that's a GP SoC.
> 
> Regards,
> 
> Tony

Ok. If it works and you think those values are not Nokia N900 specific,
but omap3430, we can add them into kernel.

Do you want me to prepare patch? Or will you do it?

-- 
Pali Rohár
pali.rohar@...il.com