Re: [PATCH v2 0/2] board: sophgo: add support for Milk-V Duo 256M

Hi Andrei,

On Sat, Aug 22, 2026 at 11:15:10AM +0200, Andrei Lalaev wrote:
> Hi Hiago,
> 
> Thank you for the patches.
> 
> From your cover letter I understood that SD card is supported.
> However whatever I try, I always get the following error:
> 
>     U-Boot 2026.07-00002-gbd5e3de2ed6a (Aug 22 2026 - 10:27:48 +0200)milkv_duo_256m
> 
>     DRAM:  256 MiB
>     Core:  20 devices, 13 uclasses, devicetree: separate
>     MMC:   mmc@4310000: 0
>     Loading Environment from nowhere... OK
>     In:    serial@4140000
>     Out:   serial@4140000
>     Err:   serial@4140000
>     Net:
>     Warning: ethernet@4070000 (eth0) using random MAC address - 16:21:8c:10:cd:96
>     eth0: ethernet@4070000
>     Hit any key to stop autoboot: 0
>     milkv_duo_256m# mmc info
>     Card did not respond to voltage select! : -110
>     milkv_duo_256m# mmc rescan
>     Card did not respond to voltage select! : -110
> 
> 
> I tried 2 different SD cards and got the same result.
> 
> Am I doing something wrong, or is there something else I need to configure?

You are most likely missing this patch:

https://lore.kernel.org/all/[email protected]/

This is needed in order to make the SD card work. This patch is already
merged on main branch, as commit 3a4a8963aace ("mmc: cv1800b_sdhci:
honor 'no-1-8-v' DT property").

Check this patch and let me know if it works now ;)

> 
> 
> Best regards,
> Andrei Lalaev

Regards,
Hiago.