linux-kernel - Re: [PATCH v3] clk: exynos5420: Remove aclk66

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Message-id: <53B16AC9.7090509@samsung.com>
Date:	Mon, 30 Jun 2014 15:48:57 +0200
From:	Tomasz Figa <t.figa@...sung.com>
To:	Doug Anderson <dianders@...omium.org>,
	Mike Turquette <mturquette@...aro.org>,
	Kukjin Kim <kgene.kim@...sung.com>
Cc:	olof@...om.net, javier.martinez@...labora.co.uk,
	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	rahul.sharma@...sung.com, shaik.ameer@...sung.com,
	arun.kk@...sung.com, alim.akhtar@...sung.com, a.hajda@...sung.com,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3] clk: exynos5420: Remove aclk66_peric from the clock
 tree description

On 05.06.2014 22:35, Doug Anderson wrote:
> The "aclk66_peric" clock is a gate clock with a whole bunch of gates
> underneath it.  This big gate isn't very useful to include in our
> clock tree.  If any of the children need to be turned on then the big
> gate will need to be on anyway.  ...and there are plenty of other "big
> gates" that aren't described in our clock tree, some of which shut off
> collections of clocks that have no relationship in the hierarchy so
> are hard to model.
> 
> "aclk66_peric" is causing earlyprintk problems since it gets disabled
> as part of the boot process, so let's just remove it.
> 
> Strangely (and for no good reason) this clock is exported as part of
> the common clock bindings.  Remove it since there are no in-kernel
> device trees using it and no reason anyone out of tree should refer to
> it either.
> 
> Signed-off-by: Doug Anderson <dianders@...omium.org>
> ---
> Changes in v3:
> - Now just remove aclk66_peric from the tree as suggested by Tomasz.
> 
> Changes in v2:
> - Use GATE_A and clk_get().  Save the clock for putting later.
> - Return 0 from exynos5420_clk_late_init().
> 
>  drivers/clk/samsung/clk-exynos5420.c   | 85 ++++++++++++++++++++++------------
>  include/dt-bindings/clock/exynos5420.h |  1 -
>  2 files changed, 55 insertions(+), 31 deletions(-)

Applied as a fix for 3.16.

Best regards,
Tomasz
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