[PATCH v2 1/3] devicetree: bindings: Document qcom, msm-id and qcom, board-id

Arnd Bergmann
2015-03-11T21:48:13Z

On Wednesday 11 March 2015 15:35:22 Kumar Gala wrote:
> On Mar 11, 2015, at 3:20 PM, Arnd Bergmann <arnd@arndb.de> wrote:
>
> > On Wednesday 11 March 2015 08:33:04 Bjorn Andersson wrote:
> >>
> >> But are these values actually used by the boot loader?
> >>
> >> As far as I could see in 8974 the dtbTool provided by Qualcomm
> >> extracts the values from the list of dtbs and use them to create the
> >> table-of-content in the QCDT blob. The boot loader then looks in this
> >> TOC to pick the right dtb to use.
> >>
> >
> > I guess if I understand this right, we just need to fix that dtbTool
> > then to look at the top-level compatible property and/or machine
> > name instead?
> >
> > Arnd
>
> Correct, and it means updating the tool for every board/dts that gets created in the future.
>
> Thus, the feeling was that having the ids kept with the dtb made maintenance far easier.
>

Part of my objection was to having nonstandard properties that are
not even used anywhere in the kernel. If you could just encode
them in the root compatible property as a string, that would be
a lot nicer.

Arnd