Build image for more devices beyond IMX6 EVK

[jupiter_hce]

Hi,

I was building and running Yocto images on iMX6 EVK using https://github.com/Freescale/meta-freescale, I am going to build a new Yocto image for a product using i.MX-6ULZ MCU, there are more extra devices such as Flash, real time clock etc.

I think there are a couple of modifications I need do:

- Replace iMX6 EVK device tree by new hardware device tree (that will be in meta-linux).
- Can I still use the BSP recipe https://github.com/Freescale/meta-freescale for the hardware Are there anything I need to change or make recipe append for adding and extending BSP recites for Flash, real time clock etc?

Thank you.

Kind regards,

- jupiter

[gusarambula · Accepted solution]

Hello Jupiter,

There are two BSPs, the BSP Release and the Community BSP. You can see the differences between the two on the following thread:

https://community.nxp.com/message/409716?commentID=409716#comment-409716

In both cases you can use them as a starting point for your application and add packages or appends as requires, which is part of the advantages of Yocto. You can see a bit more on how to manage this on the Yocto Reference Manual and also on the BSP Documentation.

I hope this helps!

Regards,

[jupiter_hce]

Thanks gusarambula, so the url = git://git.yoctoproject.org/meta-freescale is NXP official release project, correct?

I've actually already had a Yocto build system based on OE, that building system can build a Yocto image running on imx6 EVK, how can simply replace url = git://git.yoctoproject.org/meta-freescale by the community fsl BSP? I don't need to replace my whole Yocto build system based on url = https://github.com/Freescale/fsl-community-bsp-platform.

Another thing is where and how can I customize the device tree for the community project? I could only find recipes-kernel/linux/linux-fslc/imx6q-var-som-vsc.dts which is not for imx6ull, should I create the dts myself?

Thank you.

Kind regards,

- jupiter

[jupiter_hce]

I now believe that  url = git://git.yoctoproject.org/meta-freescale is the community FSL BSP as the OpenEmbedded/Yocto BSP layer for Freescale's in platforms in README. I have my own hardware device tree imx6ull_customized_device.dts, but where should I add it to? How does the kernel know the dtb file needs be compiled based on imx6ull_customized_device.dts?

Thank you.

- jh

[gusarambula]

Hello Jupiter,

You can find more details on how the device tree works and is customized on the following document:

https://community.nxp.com/docs/DOC-329664

Device Trees compiled are listed on the Makefile on arch/arm/boot/dts, all these will be compiled and then it's the bootloader who determines which device tree to use depending on the MACHINE selected.

I hope this helps!

Regards,