[U-Boot] [PATCH v3 01/11] dm: serial: Update binding for PL01x serial UART

Tom Rini
2015-08-13T18:13:46Z

On Thu, Aug 13, 2015 at 10:02:58AM -0600, Stephen Warren wrote:
> On 08/13/2015 09:59 AM, Simon Glass wrote:
> >Hi Linus,
> >
> >On 11 August 2015 at 07:00, Linus Walleij <linus.walleij@linaro.org> wrote:
> >>On Fri, Aug 7, 2015 at 3:42 PM, Simon Glass <sjg@chromium.org> wrote:
> >>
> >>>This binding differs from that of Linux. Update it and change existing
> >>>users.
> >>>
> >>>Signed-off-by: Simon Glass <sjg@chromium.org>
> >>(...)
> >>> doc/device-tree-bindings/serial/pl01x.txt | 55 ++++++++++++++++++++++++++++---
> >>
> >>So why does U-Boot have its own copy of any bindings at all?
> >>
> >>This is forking the ontology of who gets to define bindings I fear.
> >>It's a bit like have two bibles both claiming to be the word of god.
> >>(OK maybe a hyperbolic statement, but you see what I mean.)
> >>
> >>Can't we just have the bindings in the Linux kernel tree please?
> >
> >Is there any plan to move them out of Linux and put them in a separate place?
> >
> >We should make an effort to sync the device tree files with Linux periodically.
> >
> >I quite like having the bindings in U-Boot since it makes people think
> >about what they are adding. Are you worried that the bindings in
> >U-Boot might evolve separately? Certainly there has been some of that.
> >
> >However I recently sent a series to add a few things for Raspberry Pi
> >("arm: rpi: Device tree modifications for U-Boot") and I don't yet see
> >a willingness to add what some see as 'U-Boot things' to the binding.
> >How do we address that?
>
> DT isn't supposed to contain "U-Boot things", but "an OS-agnostic
> description of the hardware". So, I imagine the solution is not to
> attempt to do that:-)

This always makes me ask if the FreeBSD folks or VxWorks folks have
adopted the "Linux" bindings or if the DT files continue to be
"OS-agnostic" and "only functional with Linux". It was a while ago last
I looked but it made my head hurt a little doing a quick translation for
an SoC that I was familiar with.

--
Tom
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