cpufreq (was: My Gta02s wont charge / chgena = 0 by default)

Werner Almesberger werner at openmoko.org
Tue Jun 24 15:28:59 CEST 2008

Michael 'Mickey' Lauer wrote:
> Cool. This brings me back to asking why we did abandon or ignore cesars work 
> towards cpufreq. Andy you said something about UARTS being endangered during 
> clock switch?

The basic problem is that CPU clock and peripheral clocks are tied
closely together in the 2410/2440/2442. So when you change one,
you'll upset the others.

Later CPUs (2443 and above) have a separate PLL for peripherals,
which then allows one to choose the CPU clock independently.

- Werner

More information about the openmoko-kernel mailing list