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References: <20221211215843.24024-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
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From:   "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Date:   Fri, 23 Dec 2022 04:10:17 +0000
Message-ID: <CA+V-a8urku9J3dre00PCDGBSFmFKeNpcZ4ST3bcRuJGFj8f87w@mail.gmail.com>
Subject: Re: [RFC PATCH] clocksource/drivers/riscv: Get rid of
 clocksource_arch_init() callback
To:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Conor Dooley <conor.dooley@microchip.com>,
        Heiko Stuebner <heiko@sntech.de>
Cc:     linux-riscv@lists.infradead.org, Anup Patel <anup@brainfault.org>,
        linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
        Biju Das <biju.das.jz@bp.renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
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On Sun, Dec 11, 2022 at 9:59 PM Prabhakar <prabhakar.csengg@gmail.com> wrote:
>
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Having a clocksource_arch_init() callback always sets vdso_clock_mode to
> VDSO_CLOCKMODE_ARCHTIMER if GENERIC_GETTIMEOFDAY is enabled, this is
> required for the riscv-timer.
>
> This works for platforms where just riscv-timer clocksource is present.
> On platforms where other clock sources are available we want them to
> register with vdso_clock_mode set to VDSO_CLOCKMODE_NONE.
>
> On the Renesas RZ/Five SoC OSTM block can be used as clocksource [0], to
> avoid multiple clock sources being registered as VDSO_CLOCKMODE_ARCHTIMER
> move setting of vdso_clock_mode in the riscv-timer driver instead of doing
> this in clocksource_arch_init() callback as done similarly for ARM/64
> architecture.
>
> [0] drivers/clocksource/renesas-ostm.c
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  arch/riscv/Kconfig                | 1 -
>  arch/riscv/kernel/time.c          | 9 ---------
>  drivers/clocksource/timer-riscv.c | 7 +++++++
>  3 files changed, 7 insertions(+), 10 deletions(-)
>
Gentle ping for review.

Cheers,
Prabhakar