linux-kernel - Re: [PATCHv5] support for AD5820 camera auto-focus coil

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Date:	Thu, 2 Jun 2016 00:08:40 +0200
From:	Pavel Machek <pavel@....cz>
To:	Sakari Ailus <sakari.ailus@....fi>
Cc:	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	pali.rohar@...il.com, sre@...nel.org,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
	aaro.koskinen@....fi, patrikbachan@...il.com, serge@...lyn.com,
	linux-media@...r.kernel.org, mchehab@....samsung.com
Subject: Re: [PATCHv5] support for AD5820 camera auto-focus coil

On Wed 2016-06-01 18:24:39, Sakari Ailus wrote:
> Hi Pavel,

> > Well, it does not use any dt properties. So there's not really much to
> > discuss with dt people...
> > 
> > Maybe "ad5820" needs to go to list of simple i2c drivers somewhere,
> > but...
> 
> It's an I2C device and it does use a regulator. Not a lot, though, these are
> both quite basic stuff. This should still be documented as the people who
> write the DT bindings (in general) aren't expected to read driver code as
> well. That's at least my understanding.

Yep, you are right, I forgot about the regulator. Something like this?

Thanks,
									Pavel

diff --git a/Documentation/devicetree/bindings/media/i2c/ad5820.txt b/Documentation/devicetree/bindings/media/i2c/ad5820.txt
new file mode 100644
index 0000000..87c98f1
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ad5820.txt
@@ -0,0 +1,20 @@
+* Analog Devices AD5820 autofocus coil
+
+Required Properties:
+
+  - compatible: Must contain "adi,ad5820"
+
+  - reg: I2C slave address
+
+  - VANA-supply: supply of voltage for VANA pin
+
+Example:
+
+       /* D/A converter for auto-focus */
+       ad5820: dac@0c {
+               compatible = "adi,ad5820";
+               reg = <0x0c>;
+
+               VANA-supply = <&vaux4>;
+       };
+


-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html