linux-kernel - Re: [PATCH] clk: samsung: exynos4: Disable ARMCLK down feature on Exynos4210 SoC

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Message-ID: <CAJKOXPc_M=rY0aYpE_bhfa6Ku-E09UZ5YXXF3uH9ENTbPJsqMA@mail.gmail.com>
Date:	Sat, 28 Mar 2015 17:37:05 +0100
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	Mike Turquette <mturquette@...aro.org>,
	linux-kernel@...r.kernel.org, Stephen Boyd <sboyd@...eaurora.org>,
	Tomasz Figa <tomasz.figa@...il.com>, stable@...r.kernel.org,
	Daniel Drake <drake@...lessm.com>,
	Kukjin Kim <kgene@...nel.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] clk: samsung: exynos4: Disable ARMCLK down feature on
 Exynos4210 SoC

2015-03-27 17:27 GMT+01:00 Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>:
> Commit 42773b28e71d ("clk: samsung: exynos4: Enable ARMCLK
> down feature") enabled ARMCLK down feature on all Exynos4
> SoCs.  Unfortunately on Exynos4210 SoC ARMCLK down feature
> causes a lockup when ondemand cpufreq governor is used.
> Fix it by limiting ARMCLK down feature to Exynos4x12 SoCs.
>
> This patch was tested on:
> - Exynos4210 SoC based Trats board
> - Exynos4210 SoC based Origen board
> - Exynos4412 SoC based Trats2 board
> - Exynos4412 SoC based Odroid-U3 board
>
> Cc: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> Cc: Daniel Drake <drake@...lessm.com>
> Cc: Tomasz Figa <t.figa@...sung.com>
> Cc: Kukjin Kim <kgene@...nel.org>
> Fixes: 42773b28e71d ("clk: samsung: exynos4: Enable ARMCLK down feature")
> Cc: <stable@...r.kernel.org> # v3.17+
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> ---
>  drivers/clk/samsung/clk-exynos4.c |   11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)

Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>

Best regards,
Krzysztof
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