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

From: Laurent Pinchart
Date: Fri Nov 20 2015 - 09:52:31 EST

Hi Geert,

On Friday 20 November 2015 08:46:56 Geert Uytterhoeven wrote:
> On Thu, Nov 19, 2015 at 9:55 PM, Laurent Pinchart 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.

Out-of-tree should be banned :-)

More seriously, I suppose you wouldn't be thrilled by the idea of a
"renesas,scif-rcar-gen2" ?


Laurent Pinchart

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