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

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Message-ID: <20160215152542.GS19432@atomide.com>
Date:	Mon, 15 Feb 2016 07:25:43 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Pali Rohár <pali.rohar@...il.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

* Pali Rohár <pali.rohar@...il.com> [160215 02:12]:
> 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?

Yes please do if you can, I have my hands full with other
regressions in Linux next.

Regards,

Tony