linux-kernel - Re: [PATCH v5 4/5] Extcon: support mutually exclusive relation between cables.

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Message-ID: <20120220022729.GJ3194@opensource.wolfsonmicro.com>
Date:	Sun, 19 Feb 2012 18:27:32 -0800
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	MyungJoo Ham <myungjoo.ham@...sung.com>
Cc:	linux-kernel@...r.kernel.org, NeilBrown <neilb@...e.de>,
	Randy Dunlap <rdunlap@...otime.net>,
	Mike Lockwood <lockwood@...roid.com>,
	Arve Hjønnevag <arve@...roid.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Donggeun Kim <dg77.kim@...sung.com>, Greg KH <gregkh@...e.de>,
	Arnd Bergmann <arnd@...db.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Morten CHRISTIANSEN <morten.christiansen@...ricsson.com>,
	John Stultz <john.stultz@...aro.org>,
	Joerg Roedel <joerg.roedel@....com>, myungjoo.ham@...il.com
Subject: Re: [PATCH v5 4/5] Extcon: support mutually exclusive relation
 between cables.

On Fri, Feb 10, 2012 at 03:40:37PM +0900, MyungJoo Ham wrote:

> +What:		/sys/class/extcon/.../mutually_exclusive
> +Date:		December 2011
> +Contact:	MyungJoo Ham <myungjoo.ham@...sung.com>
> +Description:
> +		Shows the relations of mutually exclusiveness. For example,
> +		if the mutually_exclusive array of extcon_dev is
> +		{0x3, 0x5, 0xC, 0x0}, the, the output is:
> +		# cat mutually_exclusive
> +		0x3
> +		0x5
> +		0xC
> +		#

sysfs really isn't supposed to have more than one value per file so this
should be something like a directory with one array element per file.
It'd kind of be cheating but the values could be used as the filenames,
though serial numbers would be more idiomatic.

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