[Gta04-owner] Same GTA04 - now 33% faster :-)

[NeilBrown]

On Wed, 25 Jul 2012 14:30:46 +0200 Radek Polak <psonek2 at seznam.cz> wrote:

> On Wednesday, July 25, 2012 10:25:47 AM NeilBrown wrote:
> 
> > On Wed, 25 Jul 2012 09:25:36 +0200 Radek Polak <psonek2 at seznam.cz> wrote:
> > > Does this apply also to 3.2 kernel?
> > 
> > I suspect so.  There has been no change to the code in board-omap3beagle.c
> > since just before 3.2, so same code should work on GTA04 in 3.2
> > 
> > This is all you should need:
> > 
> > http://neil.brown.name/git?p=gta04;a=commitdiff;h=74526193da1b1b949df3b1103
> > 4f4682420e41cc7
> > 
> > If you can confirm that it works on 3.2 I'll add it to my tree.
> > 
> > /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
> > 
> > should list the frequencies that are available for cpufreq to use.
> 
> Maybe i did something wrong, but i dont have cpufreq dir in /sys:
> 
> root at neo:~# ls /sys/devices/system/cpu/cpu0/ 
> cpuidle  crash_notes
> 
> I just cherry-picked the commit and rebuilt. The commit and my tree is here 
> [1] [2].
> 
> I am using gta04a3_nodebug_defconfig.
> 
> Maybe 3.2 kernel does not use CPUFREQ?

Looking at the code it does seem to.  It was added in 2.6.13 in
  arch/arm/plat-omap/cpu-omap.c

Then in 3.3 it was moved to drivers/cpufreq/omap-cpufreq.c

The defconfig in 3.2 has CONFIG_CPU_FREQ=y which should be enough.
The 'scaling_available_frequencies' attribute is not a new one, so it does
look like cpufreq isn't enabled for you.

Don't know - maybe it doesn't work in 3.2 :-(

NeilBrown


> 
> Regards
> 
> Radek
> 
> 
> [1] 
> https://github.com/radekp/linux-2.6/commit/d665d27174ddff8fd4b413a3d4b6e8c2a0b6f284
> 
> [2] https://github.com/radekp/linux-2.6/commits/v3.2-gta04-qtmoko-v46

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