linux-kernel - Re: [PATCH v2 3/6] clocksource: exynos_mct: Add arch

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Message-ID: <CAJKOXPdPk-ATQd-3jzWariPek_WjG3TeLv-LJfzGWA9H7rY96Q@mail.gmail.com>
Date:   Tue, 16 Oct 2018 15:11:52 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        will.deacon@....com, catalin.marinas@....com, marc.zyngier@....com,
        tglx@...utronix.de, daniel.lezcano@...aro.org,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Bartłomiej Żołnierkiewicz 
        <b.zolnierkie@...sung.com>, Inki Dae <inki.dae@...sung.com>
Subject: Re: [PATCH v2 3/6] clocksource: exynos_mct: Add arch_timer
 cooperation mode for ARM64

On Mon, 15 Oct 2018 at 14:31, Marek Szyprowski <m.szyprowski@...sung.com> wrote:
>
> To get ARM Architected Timers working on Samsung Exynos SoCs, one has to
> first configure and enable Exynos Multi-Core Timer, because they both
> share some common hardware blocks. This patch adds a mode of cooperation
> with arch_timer driver, so kernel can use CP15 based timer interface via
> arch_timer driver, which is mandatory on ARM64. In such mode driver only
> configures MCT registers and starts the timer but don't register any
> clocksource or events in the system. Those are left to be handled by
> arch_timer driver.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> ---
>  drivers/clocksource/exynos_mct.c | 52 +++++++++++++++++++++-----------
>  1 file changed, 35 insertions(+), 17 deletions(-)

Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>

Best regards,
Krzysztof