linux-kernel - RE: [PATCH v11 2/3] clk: exynos5410: register clocks using common clock framework

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Date:	Wed, 28 May 2014 13:49:49 +0900
From:	Kukjin Kim <kgene.kim@...sung.com>
To:	'Mike Turquette' <mturquette@...aro.org>,
	'Tarek Dakhran' <t.dakhran@...sung.com>,
	linux-kernel@...r.kernel.org
Cc:	'Rob Herring' <robh+dt@...nel.org>,
	'Pawel Moll' <pawel.moll@....com>,
	'Mark Rutland' <mark.rutland@....com>,
	'Ian Campbell' <ijc+devicetree@...lion.org.uk>,
	'Kumar Gala' <galak@...eaurora.org>,
	'Rob Landley' <rob@...dley.net>,
	'Russell King' <linux@....linux.org.uk>,
	'Ben Dooks' <ben-linux@...ff.org>,
	'Tomasz Figa' <t.figa@...sung.com>,
	'Vyacheslav Tyrtov' <v.tyrtov@...sung.com>,
	'Thomas Abraham' <thomas.abraham@...aro.org>,
	'Kyungmin Park' <kyungmin.park@...sung.com>,
	'Heiko Stuebner' <heiko@...ech.de>,
	'Romain Naour' <romain.naour@...nwide.fr>,
	'Chander Kashyap' <chander.kashyap@...aro.org>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	'Tarek Dakhran' <t.dakhran@...il.com>,
	'Tarek Dakhran' <t.dakhran@...sung.com>,
	'Jonghwan Choi' <jhbird.choi@...sung.com>
Subject: RE: [PATCH v11 2/3] clk: exynos5410: register clocks using common
 clock framework

Mike Turquette wrote:
> 
> Quoting Tarek Dakhran (2014-05-25 20:23:32)
> > The EXYNOS5410 clocks are statically listed and registered
> > using the Samsung specific common clock helper functions.
> >
> > Signed-off-by: Tarek Dakhran <t.dakhran@...sung.com>
> > Signed-off-by: Vyacheslav Tyrtov <v.tyrtov@...sung.com>
> > ---
> >  .../devicetree/bindings/clock/exynos5410-clock.txt |   45 +++++
> >  drivers/clk/samsung/Makefile                       |    1 +
> >  drivers/clk/samsung/clk-exynos5410.c               |  209
> ++++++++++++++++++++
> >  include/dt-bindings/clock/exynos5410.h             |   33 ++++
> >  4 files changed, 288 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/clock/exynos5410-
> clock.txt
> >  create mode 100644 drivers/clk/samsung/clk-exynos5410.c
> >  create mode 100644 include/dt-bindings/clock/exynos5410.h
> >
> > diff --git a/Documentation/devicetree/bindings/clock/exynos5410-
> clock.txt b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
> > new file mode 100644
> > index 0000000..aeab635
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
> > @@ -0,0 +1,45 @@
> > +* Samsung Exynos5410 Clock Controller
> > +
> > +The Exynos5410 clock controller generates and supplies clock to various
> > +controllers within the Exynos5410 SoC.
> > +
> > +Required Properties:
> > +
> > +- compatible: should be "samsung,exynos5410-clock"
> > +
> > +- reg: physical base address of the controller and length of memory
> mapped
> > +  region.
> > +
> > +- #clock-cells: should be 1.
> > +
> > +All available clocks are defined as preprocessor macros in
> > +dt-bindings/clock/exynos5410.h header and can be used in device
> > +tree sources.
> > +
> > +External clock:
> > +
> > +There is clock that is generated outside the SoC. It
> > +is expected that it is defined using standard clock bindings
> > +with following clock-output-name:
> > +
> > + - "fin_pll" - PLL input clock from XXTI
> 
> Does fin_pll feed into the exynos5410-clock controller? If so, should
> the example clock-controller node below have a clocks and clock-names
> property?
> 
Well, it is fixed clocks and generated outside of the SoC...so maybe the properties are not required?

BTW, I've applied this series with Tomasz Figa's reviewed tag and sent out to arm-soc today so if any concerns on this, please let me know immediately.

> Otherwise patch looks good.
> 

Thanks,
Kukjin

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