On Tue, 17 Jan 2006, Kevin D. Kissell wrote: > > 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?? > You were on the right track when you tried hacking mips_timer_ack(), > but note that both cycles_per_jiffy and mips_hpt_frequency end up > being used in Count-based time calculations. If the board is > rebooting when you tested your mod, it's probably because there's an > error or a typo in your code. Maybe. Started checking it by added few prink() to see the values of my_cycle_per_jiffy, cycles_per_jiffy and mips_hpt_frequency. > Note that just changing the Count register increment will result in > some small error each time the clock mode changes, This is not an major probelm. But as you indicated, I will make some modification in PMU driver to takecare the drift. Thanks, -- Bharathi S
