Re: [PATCH RFC v2 7/9] watchdog: rzv2h: Add syscon support for RZ/T2H and RZ/N2H WDT control register

[Lad, Prabhakar]

Hi Guenter,

Thank you for the review.

On Thu, Jul 2, 2026 at 2:27 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
>
> On 7/2/26 05:31, Prabhakar wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> >
> > On RZ/T2H and RZ/N2H SoCs the WDTDCR register resides in the second
> > region of the System Controller (SYS) block at 0x81290000, which is
> > shared with other peripherals. A dedicated SYS driver now manages this
> > region and exposes it via a syscon regmap interface, making direct
> > mapping of the WDTDCR register by the WDT driver no longer viable.
> >
> > Update the WDT driver to support both access methods to maintain
> > backward compatibility with old device trees that use direct mapping:
> >
>
> WHy don't you convert the driver to use regmap first and then just
> update the regmap pointer for syscon support ? If that is not possible
> for some reason, I would expect to see a detailed explanation.
>
Good point. I will send patch 6/9 and the regmap conversion patch
separately, and I will send the syscon patch when the syscon changes
are accepted.

Cheers,
Prabhakar