Yocto project: meaning of machine file (.conf) variable

rprronad

Dear Experts,

I need some clarity about uboot configuration in the machine file(below) variable and its assignment.

1. UBOOT_CONFIG ??= "sd ${@bb.utils.contains('MACHINE_FEATURES', 'optee', 'sd-optee', '', d)}"

2. UBOOT_MACHINE

3. UBOOT_CONFIG[sd] =

for above variable i went through the yocto project mega manual, but i couldn't get clarity & purpose so someone plz tell me about those variables usage in the machine file.

Thanks & Regards,
Ravikumar

rprronad

Hi @Chavira Thanks for your response.

Yes, I'm referring the one of the MACHINE (.conf file), the notation of above function is different then Yocto documentation.

So How the above function will works in the meta-layer for different storage (sd, qspi, emmc, etc)?

Regards,

Ravikumar

Chavira

Hi @rprronad!
Thank you for contacting NXP Support!

Sorry for my misunderstanding.

I recommend not modifying that file, by default the Yocto is configured for "SD card" That configuration works for eMMC and SD Card boot, to add another configuration you can do it local.conf file, the additional configurations depend on the machine that you are using.

Please check chapter 5.5 of our Yocto Users Guide "U-Boot configuration" to see the configurations available depending on the board that you are using

https://www.nxp.com/docs/en/user-guide/IMX_YOCTO_PROJECT_USERS_GUIDE.pdf

Best Regards!
Chavira

rprronad

Hi @Chavira
Thanks for your response & sharing information.

1. Is there any shell script (.sh file) for copying the Linux source images(.dtb, zImage) into SD Card rootfs file system (EXT4, FAT) in the IMX6ULL Processor family?

2. What are all the procedure need to follow for the creation of SD Card ?

Thanks & Regards,

Ravikumar