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From:   Krzysztof Kozlowski <krzk@kernel.org>
Date:   Tue, 16 Oct 2018 15:11:52 +0200
Message-ID: <CAJKOXPdPk-ATQd-3jzWariPek_WjG3TeLv-LJfzGWA9H7rY96Q@mail.gmail.com>
Subject: Re: [PATCH v2 3/6] clocksource: exynos_mct: Add arch_timer
 cooperation mode for ARM64
To:     Marek Szyprowski <m.szyprowski@samsung.com>
Cc:     "linux-samsung-soc@vger.kernel.org" 
        <linux-samsung-soc@vger.kernel.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        will.deacon@arm.com, catalin.marinas@arm.com, marc.zyngier@arm.com,
        tglx@linutronix.de, daniel.lezcano@linaro.org,
        Chanwoo Choi <cw00.choi@samsung.com>,
        =?UTF-8?B?QmFydMWCb21pZWogxbtvxYJuaWVya2lld2ljeg==?= 
        <b.zolnierkie@samsung.com>, Inki Dae <inki.dae@samsung.com>
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On Mon, 15 Oct 2018 at 14:31, Marek Szyprowski <m.szyprowski@samsung.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@samsung.com>
> ---
>  drivers/clocksource/exynos_mct.c | 52 +++++++++++++++++++++-----------
>  1 file changed, 35 insertions(+), 17 deletions(-)

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

Best regards,
Krzysztof