linux-kernel - Re: [PATCH 1/3] clk: exynos-audss: Keep the parent of mout

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Message-ID: <CAC5m3BwYTSBW9WxH+f002aU1mMQH-0_WbGUiPgsabOh8C-YV+A@mail.gmail.com>
Date:	Thu, 12 Jun 2014 13:00:53 +0530
From:	Tushar Behera <tushar.b@...sung.com>
To:	Tomasz Figa <tomasz.figa@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	ML Devicetree <devicetree@...r.kernel.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	ML Arch-Arm <linux-arm-kernel@...ts.infradead.org>,
	Mike Turquette <mturquette@...aro.org>,
	Tomasz Figa <t.figa@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kevin Hilman <khilman@...aro.org>,
	Doug Anderson <dianders@...gle.com>,
	Shaik Ameer Basha <shaik.ameer@...sung.com>
Subject: Re: [PATCH 1/3] clk: exynos-audss: Keep the parent of mout_audss
 always enabled

On Wed, Jun 11, 2014 at 10:58 PM, Tomasz Figa <tomasz.figa@...il.com> wrote:
> Hi Tushar,
>
> On 11.06.2014 07:32, Tushar Behera wrote:
>> When the output clock of AUDSS mux is disabled, we are getting kernel
>> oops while doing a clk_get() on other clocks provided by AUDSS. Though
>> user manual doesn't specify this dependency, we came across this issue
>> while disabling the parent of AUDSS mux clocks.
>
> Could you provide more data about this oops? E.g. kernel log, platforms
> it affects (just peach-pit or also others), test case, extra patches
> applied on top of mainline (if any).
>
> I don't like this solution, because keeping a clock always enabled is
> usually not desirable and this driver is also used on other platforms
> than peach-pit, so this change will affect all of them.
>

I will update later after doing similar tests on other platforms.

> Best regards,
> Tomasz
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