u-boot 32-bit on Raspberry Pi 4

[Jaehoon Chung]

Hi

On 1/18/20 9:22 AM, Alexander von Gluck IV wrote:
> Has anyone successfully used u-boot on the Raspberry Pi 4 in 32-bit mode?

I'm using 32-bit u-boot on RPI4 board with Tizen Platform.
You can refer to tizen u-boot git. Also I modified some configurations. 

https://git.tizen.org/cgit/platform/kernel/u-boot/log/?h=tizen

So you may modify some configs about your environment.


> 
> Building via the following:
> 
> make rpi_4_32b_defconfig
> ARCH=arm CROSS_COMPILE=arm-none-eabi- make
> 
> Booting via:
> 
>  * u-boot.bin on Fat32 partition
>  * start.elf from 
>  * config.txt on Fat32 partition
>    kernel=u-boot.bin
>    enable_uart=1
>    arm_64bit=0
> 

Our config.txt is below,

enable_uart=1
uart_2ndstage=1

I didn't add "arm_64bit" config.

Best Regards,
Jaehoon Chung

> Just a black screen, however, no serial uart output
> 
> Thanks!
> 
>  -- Alex
> 
>