Re: [PATCH] MIPS: implement a "bootargs-append" DT property

[Geert Uytterhoeven <geert@linux-m68k.org>]

Hi James, Daniel,

On Mon, Nov 13, 2017 at 12:23 PM, James Hogan <james.hogan@mips.com> wrote:
> On Sat, Nov 11, 2017 at 09:19:48AM -0800, Daniel Gimpelevich wrote:
>> There are two uses for this:
>>
>> 1) It may be useful to split a device-specific kernel command line between
>> a .dts file and a .dtsi file, with "bootargs" in one and "bootargs-append"
>> in the other, such as for variations of a reference board.

I've seen other use cases, e.g. the extension of the du node's "clocks" and
"clock-names" properties from arch/arm64/boot/dts/renesas/r8a7795.dtsi to
arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts.

To avoid the proliferation of "-append" versions of existing properties, what
about handling this in dtc, by adding support for an "/append-property/"
keyword?

     bootargs = "first part"
     ...
     /append-property/ bootargs = " second part".

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds