Re: [PATCH 00/16] fdt: Make OF_BOARD a boolean option

[Tom Rini]

On Wed, Oct 27, 2021 at 05:02:39PM +0200, Heinrich Schuchardt wrote:
> On 10/27/21 16:55, Tom Rini wrote:
> > On Wed, Oct 27, 2021 at 03:23:01PM +0200, Heinrich Schuchardt wrote:
> > 
> > [snip]
> > > One passed to U-Boot for fixups and further passed to the OS. This
> > > devicetree may originate from a prior boot stage, from a file loaded by
> > > U-Boot, or from a later bootstage, e.g systemd-boot's devicetree command.
> > 
> > I assume systemd-boot is implementing the same logic that extlinux.conf
> > has used for forever, yes?
> 
> It is loading the file and then calls U-Boot's implementation of the EFI
> Device Tree Fixup Protocol for fixups before passing the device-tree to the
> OS.

So it's using https://systemd.io/BOOT_LOADER_SPECIFICATION/ OK.

> > > This devicetree will not contain any U-Boot specific information.
> > 
> > To repeat, it must only have official bindings, yes, regardless of what
> > project they come from.
> > 
> 
> Don't expect prior firmware stages to provide any U-Boot specific stuff
> whatever official or non-official U-Boot specific bindings exist.

Failure to implement official bindings may result in failure to boot,
which would be pretty silly.

-- 
Tom

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