hi all:
My platform is like below:
1. single core Cortex A9
2. use global timer for system timer
after I porting cpu frequency driver based on snow ball, the cpu
frequency did change as I expected.
But the system time is incorrect( since pherial clk is got from cpu frequency)
for example:
a) cpu 1G (pherial clk = 250M) --> sleep 1 sec (OK)
b) cpu 500M (pherial clk = 125M) --> sleep 1 sec (will be measured as 2 sec)
I try to call below 2 functions to change the frequency of clocksource
and clockevent, but the above b) sleep time is still incorrect when
cpu runs in 500Mhz.
clockevents_update_freq(this_cpu_ptr(gt_evt), gt_clk_rate);
__clocksource_updatefreq_hz(>_clocksource, gt_clk_rate);
in Arm cortex A9 single core system with Global timer as system timer,
is there any kernel api to change system timer period when cpu/pherial
frequency change?
appreciate your kind help in advance,
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