[linux-yocto] Modify the device trees for sama5d35-xplained

[Bruce Ashfield]

On 16-01-15 02:00 PM, Morgan Guillou wrote:
> Thanks Bruce  for the answer,
> So I did:
> #bitbake -f -c compile core-image-minimal

This should have been your kernel recipe, not the image. Did
you typo that ? Or is that what you really ran ?

Bruce

> #bitbake core-image-minimal
> It repackaging rootfs.ubi and ubi files, but no dtb files !
> What's wrong ?
>
> -----Message d'origine-----
> De : Bruce Ashfield [mailto:bruce.ashfield at windriver.com]
> Envoyé : vendredi 15 janvier 2016 19:43
> À : Morgan Guillou; linux-yocto at yoctoproject.org
> Objet : Re: [linux-yocto] Modify the device trees for sama5d35-xplained
>
> On 16-01-15 01:24 PM, Morgan Guillou wrote:
>> I've been working with hardware sama5d35-xplained.
>>
>> I used the at91 tutorial to compile and install yocto distribution on
>> the target, that's fine.
>>
>> My next step is to redefine one interface that is custom to my board,
>> I want to enable the USART2.
>>
>> I modify the dts file:
>> "/poky/build-atmel/tmp/work-shared/sama5d3-xplained/kernel-source/arch/arm/boot/dts/at91-sama5d3_xplained.dts"
>> to add :
>>
>> usart2: serial at f8020000{
>>
>> Pinctrl-0 = <&pinctrl_usart2>;
>>
>> Status = "okay":
>>
>> };
>>
>> Maybe I'm just tired, or maybe this is just hard... but the dtb file
>> is not updated when I run bitbake.
>
> bitbake won't know that you've updated the source. So you'll need to force a re-compile of the kernel, and then rebuild your image.
>
> bitbake -f -c compile <your kernel recipe>
>
> And then you should see things repackaging next time you build the image.
>
> Bruce
>
>>
>> So do I have to manually compile the dts file or is there some way to
>> do it via "bitbake core-image-minimal" ?
>>
>> Thanks,
>>
>> Morgan.