[U-Boot] [PATCH] arm: pxa: config option for PXA270 turbo mode

[Sergey Yanovich]

On Tue, 2013-05-21 at 13:22 +0200, Marek Vasut wrote:
> > Actually, I wonder if Linux's cpufreq still does depend on bootloader speed
> > settings. Especially the turbo bit. Can you please check that? It'd be
> > interesting to know ...
> > 
> > I'd say enable it by default ... I probably have all the PXA devices
> > supported in U-Boot and I'm quite sure none of them will mind ;-)
> 
> Still, I'm surprised it wasn't enabled. I recall seeing it enabled. Weird ...

Yes, you are right. Linux's cpufreq-pxa2xx.c always sets the turbo bit.

However, if CONFIG_CPU_FREQ is not set (my case), bootloader's settings
are used.

I work on a system that has focus on low latency (industrial controller)
rather than battery life (since it has no battery).