I would like to change the Snapdragon 410 CPU frequency (for each core) early during the boot process (i.e. bootloader or kernel startup). Right now, I set the CPU frequency using a sysvinit script and call cpufreq-set to set the preferred governor and cpu frequency thresholds. However, I would like to know whether I make these changes take effect sooner during the boot process (ideally as soon as possible).
I’m currently digging through both the little kernel (bootloader) and linux kernel source for where these might be configured or configurable. Also sifting through the APQ8016 and PMIC data sheets for any clues.
Is this even possible (i.e. do I need source to the SBL code or is there some hidden register?)