[BeagleBone Black Test PATCH 0/2] port latest u-boot

[Tim Kientzle]

On Apr 7, 2014, at 2:25 AM, Xuebing Wang <xbing6 at gmail.com> wrote:

> Hi Tim and all,
> 
> This is for discussion only. Would you please advice?
> 
> This is motivated by trying to increase CPU frequency for BeagleBone Black.
> 
> AM335x cpufreq is not supported yet. In order to achieve the goal to increase
> CPU freq, I am thinking of a 2-step approach:
> 1) port latest u-boot, which have cpufreq better organized
> 2) tweak u-boot opp/freq later

Setting the processor frequency after the OS is running
is not difficult.  The AM335x TRM shows exactly how to do it.

I would not change U-Boot but rather implement
a FreeBSD driver that exposed a read/write sysctl
to reprogram the CPU frequency.

Getting powerd to work with this should be straightforward.

Tim