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

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Message-ID: <20150403213655.GO20756@valkosipuli.retiisi.org.uk>
Date:	Sat, 4 Apr 2015 00:36:55 +0300
From:	Sakari Ailus <sakari.ailus@....fi>
To:	Pavel Machek <pavel@....cz>
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: Re: [PATCHv6] media: i2c/adp1653: Documentation for devicetree
 support for adp1653

Hi Pavel,

On Fri, Apr 03, 2015 at 10:26:24PM +0200, Pavel Machek wrote:
> 
> 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.

"enable-gpios" sounds fine for me.

> 
> 									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>;
> +		};
> +	};
> 

-- 
Regards,

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