linux-kernel - Re: [PATCH/RFC v9 06/19] DT: Add documentation for the mfd Maxim max77693

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Message-id: <54857D7B.8050304@samsung.com>
Date:	Mon, 08 Dec 2014 11:29:15 +0100
From:	Jacek Anaszewski <j.anaszewski@...sung.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Sakari Ailus <sakari.ailus@....fi>, linux-leds@...r.kernel.org,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	kyungmin.park@...sung.com, b.zolnierkie@...sung.com,
	cooloney@...il.com, rpurdie@...ys.net, s.nawrocki@...sung.com,
	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	Andrzej Hajda <a.hajda@...sung.com>,
	Lee Jones <lee.jones@...aro.org>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	devicetree@...r.kernel.org
Subject: Re: [PATCH/RFC v9 06/19] DT: Add documentation for the mfd Maxim
 max77693

Hi Pavel,

On 12/04/2014 05:12 PM, Pavel Machek wrote:
> Hi!
>
>>>> +- maxim,boost-mode :
>>>> +	In boost mode the device can produce up to 1.2A of total current
>>>> +	on both outputs. The maximum current on each output is reduced
>>>> +	to 625mA then. If there are two child led nodes defined then boost
>>>> +	is enabled by default.
>>>> +	Possible values:
>>>> +		MAX77693_LED_BOOST_OFF - no boost,
>>>> +		MAX77693_LED_BOOST_ADAPTIVE - adaptive mode,
>>>> +		MAX77693_LED_BOOST_FIXED - fixed mode.
>>>> +- maxim,boost-vout : Output voltage of the boost module in millivolts.
>>>> +- maxim,vsys-min : Low input voltage level in millivolts. Flash is not fired
>>>> +	if chip estimates that system voltage could drop below this level due
>>>> +	to flash power consumption.
>>>> +
>>>> +Required properties of the LED child node:
>>>> +- label : see Documentation/devicetree/bindings/leds/common.txt
>>>> +- maxim,fled_id : Identifier of the fled output the led is connected to;
>>>
>>> I'm pretty sure this will be needed for about every chip that can drive
>>> multiple LEDs. Shouldn't it be documented in the generic documentation?
>>
>> OK.
>
> Well... "fled_id" is not exactly suitable name. On other busses, it
> would be "reg = <1>"?

I'm ok with "reg". This scheme is used for pca963x.txt and is described
as "number of LED line". We could define it similarly in the common.txt.
A device would have to specify the range of allowed values though.
I would add such a note to the generic binding.

Regards,
Jacek
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