On Tue, 17 Jan 2006, Bharathi Subramanian wrote:
> On Mon, 16 Jan 2006, Bharathi Subramanian wrote:
> > We are trying to implement the CPU Clock down feature for saving the
> > power. In this process, Whenever the CPU is put in 1/2 Clock then the
> > Timer interrupt is also getting delayed.
> > Later I found that CPU Counter is used to generate the timer intr. How
> > to make the Timer interrupt to happen at every 10ms, even if the CPU
> > is in 1/2, 1/4 or 1/8 of the original clock??
> > Processor: MIPS 4Kc 32B
> Kernel : 2.4.20 with RTLinux Patch
> In mips_timer_ack() function, the new Compare reg value loaded. Here I
> tried to put new counter value based on the present cpu clock divder
> setting. But board is getting rebooted.
> Is it the right way to handle this issue?? Anybody faced same
> condition, kindly share your exprience with me.
I read the Linux Porting guide by Junsun. In that,(s)he mention, "Some
CPUs may have a variable CPU frequency which makes CPU counter not
usable as a timer source". Does it mean that, we can't do the CPU
Clock down in MIPS Processor??
Kindly CC the reply.