u-boot 32-bit on Raspberry Pi 4

[Jaehoon Chung]

On 1/18/20 10:53 AM, Jaehoon Chung wrote:
> 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://protect2.fireeye.com/url?k=d4848ff3-8957d64d-d48504bc-0cc47a31ba82-40c2c54dba31c6f3&u=https://git.tizen.org/cgit/platform/kernel/u-boot/log/?h=tizen

Oops.
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
>>
>>
> 
> 
>