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

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Date:	Wed, 15 Jun 2016 13:41:18 -0500
From:	Rob Herring <robh@...nel.org>
To:	Sakari Ailus <sakari.ailus@....fi>
Cc:	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...nel.org>,
	Pali Rohár <pali.rohar@...il.com>,
	Pavel Machek <pavel@....cz>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] media: et8ek8: Add documentation

On Tue, Jun 14, 2016 at 11:31 PM, Sakari Ailus <sakari.ailus@....fi> wrote:
> 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.

Okay, then state that in the description.

Rob