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References: <20240322151219.885832-1-prabhakar.mahadev-lad.rj@bp.renesas.com> <20240322151219.885832-3-prabhakar.mahadev-lad.rj@bp.renesas.com>
In-Reply-To: <20240322151219.885832-3-prabhakar.mahadev-lad.rj@bp.renesas.com>
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Wed, 17 Apr 2024 17:07:29 +0200
Message-ID: <CAMuHMdWCttb=ze27vfHs7LtjADU7v-nXimH8mm2zj5D6Uyvstg@mail.gmail.com>
Subject: Re: [PATCH v2 2/2] clocksource/drivers/renesas-ostm: Allow OSTM
 driver to reprobe for RZ/V2H(P) SoC
To: Prabhakar <prabhakar.csengg@gmail.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>, Thomas Gleixner <tglx@linutronix.de>, 
	Rob Herring <robh+dt@kernel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>, 
	Chris Brandt <chris.brandt@renesas.com>, Magnus Damm <magnus.damm@gmail.com>, 
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, 
	linux-arm-kernel@lists.infradead.org, linux-renesas-soc@vger.kernel.org, 
	Fabrizio Castro <fabrizio.castro.jz@renesas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
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On Fri, Mar 22, 2024 at 4:13=E2=80=AFPM Prabhakar <prabhakar.csengg@gmail.c=
om> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> The RZ/V2H(P) (R9A09G057) SoC is equipped with the Generic Timer Module,
> also known as OSTM. Similar to the RZ/G2L SoC, the OSTM on the RZ/V2H(P)
> SoC requires the reset line to be deasserted before accessing any
> registers.
>
> Early call to ostm_init() happens through TIMER_OF_DECLARE() which always
> fails with -EPROBE_DEFER, as resets are not available that early in the
> boot process.  To address this issue on the RZ/V2H(P) SoC, enable the OST=
M
> driver to be reprobed through the platform driver probe mechanism.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> v1->v2
> - Updated commit description
> - Dropped usage of IS_ENABLED() and used defined() instead

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

--=20
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k=
org

In personal conversations with technical people, I call myself a hacker. Bu=
t
when I'm talking to journalists I just say "programmer" or something like t=
hat.
                                -- Linus Torvalds