RE: [PATCH v2 3/3] clk: renesas: r9a09g057: Remove entries for WDT{0,2,3}

[Fabrizio Castro]

Hi Geert,

Thanks for your reply.

> From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> Sent: 03 March 2026 13:30
> To: Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
> Cc: Rob Herring <robh@xxxxxxxxxx>; Guenter Roeck <linux@xxxxxxxxxxxx>; Michael Turquette
> <mturquette@xxxxxxxxxxxx>; Stephen Boyd <sboyd@xxxxxxxxxx>; Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx>;
> Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>; Conor Dooley <conor+dt@xxxxxxxxxx>; magnus.damm
> <magnus.damm@xxxxxxxxx>; Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>; linux-
> watchdog@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux-renesas-soc@xxxxxxxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; linux-clk@xxxxxxxxxxxxxxx; Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> Subject: Re: [PATCH v2 3/3] clk: renesas: r9a09g057: Remove entries for WDT{0,2,3}
> 
> Hi Fabrizio,
> 
> On Tue, 3 Feb 2026 at 13:43, Fabrizio Castro
> <fabrizio.castro.jz@xxxxxxxxxxx> wrote:
> > The HW user manual for the Renesas RZ/V2H(P) SoC specifies
> > that only the WDT1 IP is supposed to be used by Linux,
> > while the WDT{0,2,3} IPs are supposed to be used by the CM33
> > and CR8 cores.
> >
> > Remove the clock and reset entries for WDT{0,2,3} to prevent
> > interfering with the CM33 and CR8 cores.
> >
> > This change is harmless as only WDT1 is used by Linux, there
> > are no users for the WDT{0,2,3} cores.
> >
> > Fixes: 3aeccbe08171 ("clk: renesas: r9a09g057: Add clock and reset entries for GTM/RIIC/SDHI/WDT")
> > Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
> 
> Thanks for your patch!
> 
> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> i.e. will queue in renesas-clk-fixes for v7.0.

Thanks!

> 
> Apparently the same applies to RZ/V2N.  Shall I just apply this patch
> to drivers/clk/renesas/r9a09g056-cpg.c, too, with the SoC name
> and part number updated, and
> 
>     Fixes: e018f9f8973760fa ("clk: renesas: r9a09g056: Add clock and
> reset entries for WDT controllers")
> 
> ?

The manual for the Renesas RZ/V2N is not super clear on this matter,
I am waiting for further clarification.

I'll send another series for the RZ/V2N if appropriate, therefore let's
keep RZ/V2N as-is for now.

Thanks!

Fab

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
> 
> 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