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@samsung.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.