21 May
2013
21 May
'13
6:23 p.m.
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).