[yocto] customising a bsp

[Paul Barker]

On Mon, 1 Apr 2019, at 08:49, Sergio Torres Soldado wrote:
> Hi Dimitris,
> 
>  That is very versatile thanks. It is a way of solving the issue.
> 
>  Just as a side note this is what I did so far trying to separate the 
> changes to the machine:
> 
>  added the following to a layer I created:
> . 
> |-- conf 
> | `-- machine 
> | `-- raspberrypi3-custom.conf 
> 
> Initially raspberrypi3-custom.conf was just a copy of raspberrpi3.conf 
> in meta-raspberry but I get the following excerpt of an error:
> """
> ERROR: linux-raspberrypi-1_4.14.98+gitAUTOINC+5d63a4595d-r0 
> do_kernel_metadata: Could not locate BSP definition for 
> raspberrypi3-custom/standard and no defconfig was provided
> """
> 
> To remedy this I added the following line to raspberrypi3-custom.conf:
> """
> KBUILD_DEFCONFIG_raspberrypi3-custom ?= "bcm2709_defconfig
> """
> 
> But then I get the error:
> """
> ERROR: bcm2835-bootfiles-20190212-r3 do_populate_lic: QA Issue: 
> bcm2835-bootfiles: LIC_FILES_CHKSUM points to an invalid file: 
> /opt/yocto/workspace/build/tmp/work/raspberrypi3_custom-poky-linux-gnueabi/bcm2835-bootfiles/20190212-r3/firmware-83977fe3b6ef54c1d29c83b0a778d330f523441f/boot/LICENCE.broadcom [license-checksum]
> ERROR: bcm2835-bootfiles-20190212-r3 do_populate_lic: Fatal QA errors 
> found, failing task.
> ERROR: bcm2835-bootfiles-20190212-r3 do_populate_lic: Function failed: 
> populate_lic_qa_checksum
> ERROR: Logfile of failure stored in: 
> /opt/yocto/workspace/build/tmp/work/raspberrypi3_custom-poky-linux-gnueabi/bcm2835-bootfiles/20190212-r3/temp/log.do_populate_lic.30228
> """
> 
> I ended up editing raspberrypi3.conf directly basically branching 
> meta-raspberrypi.
> 

Hi Sergio,

You could look at how we handle things in the BSP for the Sancloud BeagleBone Enhanced (BBE). This board is based on the BeagleBone Black and so in Yocto Project any overrides, COMPATIBLE_HOST values, etc which apply for the beaglebone should also apply for the bbe. To do this we add "beaglebone" to the MACHINEOVERRIDES list along with the appropriate separator which is ":". See https://bitbucket.sancloud.co.uk/projects/YB/repos/meta-sancloud/browse/conf/machine/bbe.conf for details.

So you should be able to add a line like this to your raspberrypi3-custom.conf file:

    MACHINEOVERRIDES =. "raspberrypi3:"

Thanks,

-- 
Paul Barker
Managing Director & Principal Engineer
Beta Five Ltd