linux-kernel - Re: [PATCH 1/2] i2c: Add driver for Cadence I2C controller

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Message-ID: <20140304170401.GA18529@joshc.qualcomm.com>
Date:	Tue, 4 Mar 2014 11:04:01 -0600
From:	Josh Cartwright <joshc@...eaurora.org>
To:	S?ren Brinkmann <soren.brinkmann@...inx.com>
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>,
	Michal Simek <michal.simek@...inx.com>,
	Wolfram Sang <wsa@...-dreams.de>, devicetree@...r.kernel.org,
	Harini Katakam <harinik@...inx.com>, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] i2c: Add driver for Cadence I2C controller

On Fri, Feb 28, 2014 at 07:06:29PM -0800, S?ren Brinkmann wrote:
> On Fri, 2014-02-28 at 04:00PM -0800, Soren Brinkmann wrote:
> > Add a driver for the Cadence I2C controller. This controller is for
> > example found in Xilinx Zynq.
> > 
> > Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
> > ---
> >  .../devicetree/bindings/i2c/i2c-cadence.txt        |  21 +
> >  MAINTAINERS                                        |   1 +
> >  drivers/i2c/busses/Kconfig                         |   7 +
> >  drivers/i2c/busses/Makefile                        |   1 +
> >  drivers/i2c/busses/i2c-cadence.c                   | 901 +++++++++++++++++++++
> >  5 files changed, 931 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/i2c/i2c-cadence.txt
> >  create mode 100644 drivers/i2c/busses/i2c-cadence.c
> > 
> [...]
> > diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> > index f5ed03164d86..7806c1654068 100644
> > --- a/drivers/i2c/busses/Kconfig
> > +++ b/drivers/i2c/busses/Kconfig
> > @@ -375,6 +375,13 @@ config I2C_BLACKFIN_TWI_CLK_KHZ
> >  	help
> >  	  The unit of the TWI clock is kHz.
> >  
> > +config I2C_CADENCE
> > +	tristate "Cadence I2C Controller"
> > +	depends on ARCH_ZYNQ
> This can be reduced to a dependency on COMMON_CLK only, I think.

Do you really need to depend on COMMON_CLK?  Most of the clk_* API's are
properly stubbed when !HAVE_CLK.

Also, you may want to split out the device tree bindings in a separate
patch for separate review.

-- 
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