[PATCH] riscv: dts: sophgo: add initial Milk-V Duo S board device tree

[Conor Dooley]

On Thu, Apr 11, 2024 at 10:35:55AM +0200, Michael Opdenacker wrote:
> Hi Jisheng,
> 
> On 4/10/24 at 12:24, Jisheng Zhang wrote:
> > setting the correct bus-width is necessary for better performance
> > no-1-8-v can be removed, but it doesn't harm anything because
> > the board doesn't supply 1.8v
> > 
> > no-mmc and no-sdio to make the probe a bit quicker
> 
> Many thanks for your advice!
> 
> However, whether I apply these changes or not,
> git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git is now broken for
> me:
> Error: arch/riscv/boot/dts/sophgo/sg2000-milkv-duos.dts:32.1-8 Label or path
> sdhci0 not found

This is probably just because you need to use the for-next branch of
https://github.com/sophgo/linux.git as your base. Palmer doesn't apply
dts patchs to the riscv repo. Usually working on linux-next is fine for
these kinds of activities.

> I was previously testing with linux-next, but it's now broken too, though in
> a different way:
> [    1.306811] /dev/root: Can't open blockdev
> [    1.311200] VFS: Cannot open root device "/dev/mmcblk0p2" or
> unknown-block(0,0): error -6
> 
> Shall I submit my updates anyway?

This is probably worth investigating by someone, providing a longer log
would help if you don't wanna do so yourself. Did you rebase on a more
recent linux-next and this cropped up?
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