linux-kernel - Re: [PATCH] arm64: dts: renesas: rzg2ul-smarc-som: Drop enabling wdt2

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Message-ID: <CAMuHMdWzWQgL1eki_aL_MnfQfM_S1yTuabWQAP8GzuA_D_A_kw@mail.gmail.com>
Date:   Mon, 19 Sep 2022 12:10:32 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Biju Das <biju.das.jz@...renesas.com>
Cc:     "Lad, Prabhakar" <prabhakar.csengg@...il.com>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH] arm64: dts: renesas: rzg2ul-smarc-som: Drop enabling wdt2

Hi Biju,

On Mon, Sep 19, 2022 at 12:06 PM Biju Das <biju.das.jz@...renesas.com> wrote:
> > On Sun, Sep 18, 2022 at 10:04 AM Geert Uytterhoeven <geert@...ux-
> > m68k.org> wrote:
> > > On Wed, Sep 14, 2022 at 3:43 PM Prabhakar
> > <prabhakar.csengg@...il.com> wrote:
> > > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > > >
> > > > WDT CH2 is specifically to check the operation of Cortex-M33 CPU
> > so
> > > > don't enable WDT2 by default.
> > > >
> > For consistency I'll drop enabling WDT2 from the RZ/G2L{C} too.
>
> Does remove unused clocks turn off WDT2 clock during late init??
>
> If that is the case, we should remove entries from clock table as well?

Or add it to *_crit_mod_clks[]?

Note that drivers/clk/renesas/r9a07g043-cpg.c creates wdt2 clocks
and resets, so that should probably be moved inside the #ifdef
CONFIG_ARM64 section.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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