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

[Xuebing Wang]

Thanks Tim.

Do you see a need to port the latest u-boot, with AM33xx code better 
organized?

As you can see, the way to configure is even changed from 
am335x_evm_config to am335x_boneblack_config.

Does the current BeagleBone Black FreeBSD u-boot support below?
a) Boot ubldr, kernel and whole system from NFS
b) Boot ubldr, kernel ... from Ethernet over USB

Thanks.


On 04/08/2014 09:41 AM, Tim Kientzle wrote:
> 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
>
>

-- 
Thanks,
Xuebing Wang