linux-kernel - Re: [PATCH] clk: samsung: exynos5420: Mark CLK_ACLK432_SCALER as CLK_IS

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Message-id: <551ac156-0cfa-29be-335f-d8a1f171cd8a@samsung.com>
Date:   Fri, 20 Jan 2017 13:32:18 +0100
From:   Sylwester Nawrocki <s.nawrocki@...sung.com>
To:     Javier Martinez Canillas <javier@....samsung.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>
Cc:     linux-kernel@...r.kernel.org, Inki Dae <inki.dae@...sung.com>,
        Andi Shyti <andi.shyti@...sung.com>,
        Shuah Khan <shuahkh@....samsung.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        linux-clk@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        Tomasz Figa <tomasz.figa@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] clk: samsung: exynos5420: Mark CLK_ACLK432_SCALER as
 CLK_IS_CRITICAL

On 01/20/2017 11:41 AM, Javier Martinez Canillas wrote:
> On Exynos5800 SoC the SCALER block uses 2 input clocks: CLK_ACLK_300_GSCL
> and CLK_ACLK432_SCALER, so both needs to be ungated in order to access it.
> 
> But Exynos5420 only has the CLK_ACLK_300_GSCL as gsc_pd clk. So just using
> this definition from exynos5420.dtsi in Exynos5800 leads to the following:
[...]
> So until a proper solution based on runtime PM gets merged, mark the clock
> as critical to prevent it to be gated.
> 
> Suggested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>

Acked-by: Sylwester Nawrocki <s.nawrocki@...sung.com>