linux-kernel - [PATCHv6] media: i2c/adp1653: Documentation for devicetree support for adp1653

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Message-ID: <20150403202624.GA4308@amd>
Date:	Fri, 3 Apr 2015 22:26:24 +0200
From:	Pavel Machek <pavel@....cz>
To:	Sakari Ailus <sakari.ailus@....fi>
Cc:	Andrew Morton <akpm@...l.org>, pali.rohar@...il.com,
	sre@...ian.org, sre@...g0.de,
	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, ivo.g.dimitrov.75@...il.com,
	patrikbachan@...il.com, galak@...eaurora.org,
	bcousson@...libre.com, m.chehab@...sung.com,
	devicetree@...r.kernel.org
Subject: [PATCHv6] media: i2c/adp1653: Documentation for devicetree support
 for adp1653


Documentation for adp1653 binding.

---

> Please split this as Javier suggested. I'd think both could go through
> the media-tree unless someone objects.

Please apply.

> > +  - power-gpios: Reference to the GPIO that controls the power for the chip.
> 
> You're using power-gpios in documentation only.

Which is ok, because generic code adds "-gpios" itself.

> The spec refers to this by "EN". How about "en-gpios" instead? This
> definitely isn't about power, but about resetting the chip. It gets the
> power through another pin.

It controls power of the chip. Noone gets _power_ through gpios,
hopefully. Yes, I can rename it. "en-gpios" is too ugly to
live. Sebastian suggested "enable". Hope that's okay with you.

									Pavel

new file mode 100644
index 0000000..da9934a
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/adp1653.txt
@@ -0,0 +1,37 @@
+* Analog Devices ADP1653 flash LED driver
+
+Required Properties:
+
+  - compatible: Must contain be "adi,adp1653"
+
+  - reg: I2C slave address
+
+  - power-gpios: Reference to the GPIO that controls the power for the chip.
+
+There are two LED outputs available - flash and indicator. One LED is
+represented by one child node, nodes need to be named "flash" and "indicator".
+
+Required properties of the LED child node:
+- max-microamp : see Documentation/devicetree/bindings/leds/common.txt
+
+Required properties of the flash LED child node:
+
+- flash-max-microamp : see Documentation/devicetree/bindings/leds/common.txt
+- flash-timeout-us : see Documentation/devicetree/bindings/leds/common.txt
+
+Example:
+
+	adp1653: led-controller@30 {
+		compatible = "adi,adp1653";
+		reg = <0x30>;
+		power-gpios = <&gpio3 24 GPIO_ACTIVE_HIGH>; /* 88 */
+
+		flash {
+			flash-timeout-us = <500000>;
+			flash-max-microamp = <320000>;
+			max-microamp = <50000>;
+		};
+		indicator {
+			max-microamp = <17500>;
+		};
+	};

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