Re: [PATCH v3 05/12] dt-bindings: rtc: renesas,rzg3s-rtc: Document the Renesas RTCA-3 IP

Geert Uytterhoeven
2024-10-10T15:31:25Z

Hi Claudiu,

On Thu, Oct 10, 2024 at 11:52 AM claudiu beznea
<claudiu.beznea@tuxon.dev> wrote:
> On 10.10.2024 12:29, Geert Uytterhoeven wrote:
> > On Fri, Aug 30, 2024 at 3:02 PM Claudiu <claudiu.beznea@tuxon.dev> wrote:
> >> Document the RTC IP (RTCA-3) available on the Renesas RZ/G3S SoC.
> >> The RTC IP available on Renesas RZ/V2H is almost identical with the
> >> one found on Renesas RZ/G3S (it misses the time capture functionality
> >> which is not yet implemented on proposed driver). For this, added also a
> >> generic compatible that will be used at the moment as fallback for both
> >> RZ/G3S and RZ/V2H.

> > Sorry for chiming in late, but this RTCA-3 block seems to be a
> > derivative of the RTC blocks found on older SuperH SoCs, and on RZ/A1
> > and RZ/A2 ARM SoCs. Differences are found in (lack of)
> > 100/1000-year-count parts and the Year Alarm Enable Register, and in
> > some control register bits.
>
> At a 1st look it seems so, yes. I was inclined at the beginning to just use
> the rtc-sh but the RZ/G3S HW manual mentions a lot of restrictions that
> need to be followed when configuring the IP. Because of these restrictions
> I chose to have a different driver. Otherwise the rtc-sh would have become
> way too complication as far as I can tell.

[...]

Thank you, makes sense!

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