Dear all,
I'm reading the MPSS3.3 source codes.
In \drivers\micpm\mic_cpufreq.c, there are some definitions as following:
#define K1OM_FREQ_DELAY 10 /* delay this many usecs, for each loop of the freq set routine */
#define K1OM_VID_DELAY 50 /* delay this many usecs for each loop of the vid set routine */
#define K1OM_FREQ_LOOPS 50 /* # of times to loop before we bail */
#define K1OM_VID_LOOPS 2
By checking the routines of set_cur_freq_k1om() and set_vid_k1om(), where the above definitions are used to control the frequency/voltage scaling, I guess that maximal delay of frequency scaling is 10x50=500 usecs, while it's 50x2x2=200 usecs for voltage scaling.
Am I right?
And my question is why the voltage scaling takes shorter than frequency scaling. Usually, the voltage scaling takes much longer.
Is there some documents where I can find some information about the delay of frequency/voltage scaling?
Thanks a lot.
