linux-kernel - Re: [PATCH v3 2/2] media: et8ek8: Add documentation

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Message-ID: <20160615043116.GG26360@valkosipuli.retiisi.org.uk>
Date:	Wed, 15 Jun 2016 07:31:16 +0300
From:	Sakari Ailus <sakari.ailus@....fi>
To:	Rob Herring <robh@...nel.org>
Cc:	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>, sre@...nel.org,
	pali.rohar@...il.com, pavel@....cz, linux-media@...r.kernel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	mchehab@....samsung.com, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] media: et8ek8: Add documentation

Hi Rob,

On Tue, Jun 14, 2016 at 05:05:17PM -0500, Rob Herring wrote:
> On Sat, Jun 11, 2016 at 06:39:53PM +0300, Ivaylo Dimitrov wrote:
> > Add DT bindings description
> 
> Not exactly the best commit msg.
> 
> > 
> > Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>
> > ---
> >  .../bindings/media/i2c/toshiba,et8ek8.txt          | 50 ++++++++++++++++++++++
> >  1 file changed, 50 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/media/i2c/toshiba,et8ek8.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/media/i2c/toshiba,et8ek8.txt b/Documentation/devicetree/bindings/media/i2c/toshiba,et8ek8.txt
> > new file mode 100644
> > index 0000000..997d268
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/i2c/toshiba,et8ek8.txt
> > @@ -0,0 +1,50 @@
> > +Toshiba et8ek8 5MP sensor
> > +
> > +Toshiba et8ek8 5MP sensor is an image sensor found in Nokia N900 device
> > +
> > +More detailed documentation can be found in
> > +Documentation/devicetree/bindings/media/video-interfaces.txt .
> > +
> > +
> > +Mandatory properties
> > +--------------------
> > +
> > +- compatible: "toshiba,et8ek8"
> > +- reg: I2C address (0x3e, or an alternative address)
> > +- vana-supply: Analogue voltage supply (VANA), 2.8 volts
> 
> > +- clocks: External clock to the sensor
> > +- clock-frequency: Frequency of the external clock to the sensor
> 
> These should be mutually-exclusive. If you have a clock, then you can 
> get the frequency at runtime.

Yes, you can. But the intention is to set the frequency: the sensor requires
a particular, pre-determined frequency. Typically this is specific to the
board.

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk