Re: [PATCH 17/25] serial: sh-sci: Correct SCIF type on R-Car for BRG

Geert Uytterhoeven
2015-11-20T07:47:01Z

Hi Laurent,

On Thu, Nov 19, 2015 at 9:55 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Thursday 19 November 2015 19:38:56 Geert Uytterhoeven wrote:
>> The "renesas,scif" compatible value is currently used for the SCIF
>> variant in all Renesas SoCs of the R-Car family. However, the variant
>> used in the R-Car family is not the common "SH-4(A)" variant, but a
>> derivative with added "Baud Rate Generator for External Clock" (BRG),
>> which is also present in sh7734.
>
> Time to introduce a "renesas,scif-rcar" compatible string ? ;-)
>
> As the only DT-enabled platform to have a different SCIF type is r7s72100 we
> could also consider just switching the regtype to SCIx_SH4_SCIF_BRG_REGTYPE
> for the generic "renesas,scif" entry as it's listed after the "renesas,scif-
> r7s72100" entry. That might cause an issue if we want to enable DT on arch/sh
> though, but even if that happens due to the J-Core processors I'd be surprised
> to see the old Renesas SH platforms being moved to DT.

I thought about that, but you never know in which out-of-tree BSP it ended up
being used, too. So better safe than sorry.

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