| Message ID | 1473421394-9745-2-git-send-email-bd-phuc@jinso.co.jp (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Phuc-san, On Fri, Sep 9, 2016 at 1:43 PM, <bd-phuc@jinso.co.jp> wrote: > Add documentation for new separate CMT0 and CMT1 DT compatible strings > for R-Car Gen3. > > Signed-off-by: Bui Duc Phuc <bd-phuc@jinso.co.jp> > --- > Documentation/devicetree/bindings/timer/renesas,cmt.txt | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/Documentation/devicetree/bindings/timer/renesas,cmt.txt b/Documentation/devicetree/bindings/timer/renesas,cmt.txt > index 1a05c1b..72fd526 100644 > --- a/Documentation/devicetree/bindings/timer/renesas,cmt.txt > +++ b/Documentation/devicetree/bindings/timer/renesas,cmt.txt > @@ -52,6 +52,8 @@ Required Properties: > (CMT[01] on r8a73a4, r8a7790 and r8a7791) > This is a fallback for the renesas,cmt-48-r8a73a4, > renesas,cmt-48-r8a7790 and renesas,cmt-48-r8a7791 entries. > + - "renesas,cmt-48-gen3" for third generation 48-bit CMT > + (CMT[01] on r8a7795 and r8a7796) I think the plan was to get rid of the renesas,cmt-48-* bindings, as they do not allow to differentiate between CMT0 and CMT1, which have different feature sets. Cfr. Magnus' series "clocksource: sh_cmt: DT binding rework V4" (https://lkml.org/lkml/2016/3/14/433). Magnus: What's the status of your series? 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 -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Dear Geert, > I think the plan was to get rid of the renesas,cmt-48-* bindings, as they do > not allow to differentiate between CMT0 and CMT1, which have different feature > sets. > > Cfr. Magnus' series "clocksource: sh_cmt: DT binding rework V4" > (https://lkml.org/lkml/2016/3/14/433). > > Magnus: What's the status of your series? Thank for your comments. I will update in V2. I am still waiting for Magnus's comments, but from my point of view,Magnus's patches seem support 32 bit counter only, they are not suitable for 48bit counter. According to hardware manual, there has to be registers ( CMCSRH, CMCNTH,CMCORH) set for 48 bit counter, but I do not see the registers ( CMCSRH, CMCNTH,CMCORH) in Magnus's patches.
diff --git a/Documentation/devicetree/bindings/timer/renesas,cmt.txt b/Documentation/devicetree/bindings/timer/renesas,cmt.txt index 1a05c1b..72fd526 100644 --- a/Documentation/devicetree/bindings/timer/renesas,cmt.txt +++ b/Documentation/devicetree/bindings/timer/renesas,cmt.txt @@ -52,6 +52,8 @@ Required Properties: (CMT[01] on r8a73a4, r8a7790 and r8a7791) This is a fallback for the renesas,cmt-48-r8a73a4, renesas,cmt-48-r8a7790 and renesas,cmt-48-r8a7791 entries. + - "renesas,cmt-48-gen3" for third generation 48-bit CMT + (CMT[01] on r8a7795 and r8a7796) - reg: base address and length of the registers block for the timer module. - interrupts: interrupt-specifier for the timer, one per channel.