From: Geert Uytterhoeven <geert@linux-m68k.org>
To: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Cc: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
Rob Herring <robh+dt@kernel.org>,
Wolfgang Grandegger <wg@grandegger.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
linux-can@vger.kernel.org, netdev <netdev@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
Biju Das <biju.das.jz@bp.renesas.com>
Subject: Re: [PATCH 3/6] dt-bindings: clk: r9a07g044-cpg: Add entry for P0_DIV2 core clock
Date: Fri, 16 Jul 2021 10:56:23 +0200 [thread overview]
Message-ID: <CAMuHMdWBqLcCGWkP9JoALuiXT1m9a1rRwR8ExShUQmJ1HCikZA@mail.gmail.com> (raw)
In-Reply-To: <CA+V-a8v5m-F-n4E9HpwLe1C9gHWepTc0rCVk5oh5RCJ7oTXe2A@mail.gmail.com>
Hi Prabhakar,
On Fri, Jul 16, 2021 at 10:45 AM Lad, Prabhakar
<prabhakar.csengg@gmail.com> wrote:
> On Fri, Jul 16, 2021 at 9:08 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > On Thu, Jul 15, 2021 at 8:21 PM Lad Prabhakar
> > <prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
> > > Add P0_DIV2 core clock required for CANFD module. CANFD core clock is
> > > sourced from P0_DIV2 referenced from HW manual Rev.0.50.
> >
> > OK.
> >
> > > Also add R9A07G044_LAST_CORE_CLK entry to avoid changes in
> > > r9a07g044-cpg.c file.
> >
> > I'm not so fond of adding this. Unlike the other definitions, it is
> > not really part of the bindings, but merely a convenience definition
> > for the driver. Furthermore it has to change when a new definition
> > is ever added.
> >
> Agreed will drop this.
>
> > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > > Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
> > > ---
> > > include/dt-bindings/clock/r9a07g044-cpg.h | 2 ++
> > > 1 file changed, 2 insertions(+)
> > >
> > > diff --git a/include/dt-bindings/clock/r9a07g044-cpg.h b/include/dt-bindings/clock/r9a07g044-cpg.h
> > > index 0728ad07ff7a..2fd20db0b2f4 100644
> > > --- a/include/dt-bindings/clock/r9a07g044-cpg.h
> > > +++ b/include/dt-bindings/clock/r9a07g044-cpg.h
> > > @@ -30,6 +30,8 @@
> > > #define R9A07G044_CLK_P2 19
> > > #define R9A07G044_CLK_AT 20
> > > #define R9A07G044_OSCCLK 21
> > > +#define R9A07G044_CLK_P0_DIV2 22
> > > +#define R9A07G044_LAST_CORE_CLK 23
> >
> > Third issue: off-by-one error, it should be 22 ;-)
> >
> 23 was intentionally as these numbers aren't used for core clock count
> we use r9a07g044_core_clks[] instead.
It ends up as an off-by-one bug in the range check in
rzg2l_cpg_clk_src_twocell_get().
> Said that I'll drop this.
OK.
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
next prev parent reply other threads:[~2021-07-16 8:57 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-15 18:21 [PATCH 0/6] Renesas RZ/G2L CANFD support Lad Prabhakar
2021-07-15 18:21 ` [PATCH 1/6] dt-bindings: net: can: renesas,rcar-canfd: Document RZ/G2L SoC Lad Prabhakar
2021-07-16 7:38 ` Geert Uytterhoeven
2021-07-16 8:30 ` Lad, Prabhakar
2021-07-15 18:21 ` [PATCH 2/6] can: rcar_canfd: Add support for RZ/G2L family Lad Prabhakar
2021-07-16 7:47 ` Geert Uytterhoeven
2021-07-16 8:32 ` Lad, Prabhakar
2021-07-16 10:10 ` Marc Kleine-Budde
2021-07-15 18:21 ` [PATCH 3/6] dt-bindings: clk: r9a07g044-cpg: Add entry for P0_DIV2 core clock Lad Prabhakar
2021-07-16 8:07 ` Geert Uytterhoeven
2021-07-16 8:45 ` Lad, Prabhakar
2021-07-16 8:56 ` Geert Uytterhoeven [this message]
2021-07-16 9:02 ` Lad, Prabhakar
2021-07-15 18:21 ` [PATCH 4/6] clk: renesas: r9a07g044-cpg: Add entry for fixed clock P0_DIV2 Lad Prabhakar
2021-07-16 8:09 ` Geert Uytterhoeven
2021-07-16 8:46 ` Lad, Prabhakar
2021-07-15 18:21 ` [PATCH 5/6] clk: renesas: r9a07g044-cpg: Add clock and reset entries for CANFD Lad Prabhakar
2021-07-16 7:55 ` Geert Uytterhoeven
2021-07-15 18:21 ` [PATCH 6/6] arm64: dts: renesas: r9a07g044: Add CANFD node Lad Prabhakar
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