Applying U-boot overlay from the command line?

[Rick Mann]

In the past, I'd apply an overlay by catting some stuff to .../slots. That no longer shows up in my sysfs.

I'm working on a U-boot overlay, but while experimenting, is there a way to apply the overlay from the command line after boot?

--
Rick Mann
rm...@latencyzero.com

[evilwulfie]

Nope  all done in /boot/uEnv.txt on boot

[Rick Mann]

Okay thanks.

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--
Rick Mann
rm...@latencyzero.com

[Robert Nelson]

On Mon, Mar 12, 2018 at 8:35 PM, Rick Mann <rm...@latencyzero.com> wrote:
> Okay thanks.
>
>> On Mar 12, 2018, at 18:13 , evilwulfie <evilw...@gmail.com> wrote:
>>
>> Nope all done in /boot/uEnv.txt on boot
>>
>>
>> On 3/12/2018 5:41 PM, Rick Mann wrote:
>>> In the past, I'd apply an overlay by catting some stuff to .../slots. That no longer shows up in my sysfs.
>>>
>>> I'm working on a U-boot overlay, but while experimenting, is there a way to apply the overlay from the command line after boot?

Actually, there is a way, Jason K figured this out late last week and
it has not been fully documented out side of the e-ale.org training yet...

https://cm.e-ale.org/2018/pocketbeagle/README.md

We haven't figured out how far back this goes with mainline kernels
but, create a directory under:

/sys/kernel/config/device-tree/overlays/

Like:

sudo mkdir -p /sys/kernel/config/device-tree/overlays/accel/

then just echo the *.dtbo into the ./dtbo file created in the directory above..

Regards,

--
Robert Nelson
https://rcn-ee.com/