IMX6ULEVK: Uboot board file is not using ft_board_setup

[sikumar3]

Hi,

I am migrating from U-Boot 2015.04imx_v2015.04_4.1.15_1.2.0_ga (JETHRO) to U-Boot 2019.04-lf-5.4.y_v2019.04 (ZEUS).

I noticed that the Uboot is expecting the device tree file (CONFIG_DEFAULT_DEVICE_TREE) to be set for the successful compilation.

But, the board file doesn't seem to be using the device tree information as there is no ft_board_setup(). 

Can someone tell me whether my understanding is correct? 

[kunalkotecha1]

Hi sikumar3@cisco.com ,

I believe the Device tree is used by U-boot for some of the devices that are required/verified in bootloader for booting. Also, if the "CONFIG_OF_CONTROL" macro in the board-specific defconfig is enabled then U-boot will use the device tree. You can find the description in of this macro from README - uboot-imx - i.MX U-Boot .

You can also check this by disabling the ethernet node in the "imx6ul-14x14-evk.dts" by changing "status" property as "disabled".

Regards,

Kunal

[sikumar3]

Hi Kunal,

Thanks for the response!

So, its only few uboot drivers depend on the device tree information and not the entire board init.

Any reason behind this?

Regards,

Sivakumar

[Bio_TICFSL]

Good!!