[U-Boot] [PATCH 1/2] Tegra: fdt: Add/enhance sdhci (mmc) nodes for all T20 DT files

Scott Wood
2013-02-11T19:48:59Z

On 02/05/2013 10:56:59 PM, Simon Glass wrote:
> Hi,
>
> On Tue, Feb 5, 2013 at 12:49 PM, Stephen Warren
> <swarren@wwwdotorg.org> wrote:
> > Right now, I believe your/Simon's policy on DT is to only include
> in the
> > U-Boot .dts files what's actually needed for U-Boot. I've asked that
> > this be done on a per-node basis rather than per-property basis in
> order
> > to reduce diffs. If you want to change that, and include nodes that
> > U-Boot doesn't need, that'd be great and assist unification, but
> then
> > I'd recommend simply importing the current kernel .dts files as-is
> > without any changes, rather than adding things piece-meal.
>
> I have to say that within reason I like the idea of bring in the DT
> from the kernel as is, limited perhaps to the nodes that U-Boot
> actually uses.
>
> A separate repo for the DT files seems like something that should
> happen, but I have seen little progress on that front. Still, when it
> happens, it would be nice it we could drop U-Boot's files and just use
> the kernel's. That will be a lot easier if we head in that direction
> now.

I think any device tree that makes assumptions about what U-Boot will
be fixing up, or even what addresses U-Boot will configure devices at,
belongs in the U-Boot tree. Keeping such trees in Linux has been
awkward so far, especially when a change gets made to such an
assumption, or when U-Boot isn't the only supported firmware.

-Scott