linux-kernel - Re: [PATCHSET 3/4] sysfs: divorce sysfs from kobject and driver model

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Date:	Wed, 10 Oct 2007 11:38:50 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Greg KH <greg@...ah.com>
cc:	Tejun Heo <htejun@...il.com>, <ebiederm@...ssion.com>,
	<cornelia.huck@...ibm.com>, <kay.sievers@...y.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCHSET 3/4] sysfs: divorce sysfs from kobject and driver
 model

On Tue, 9 Oct 2007, Greg KH wrote:

> The rules for sysfs files are the following:
> 	- one value, in text format, per file.
> 	- no action apon open/close
> 	- binary files are only allowed for "pass-through" type files
> 	  that the kernel does not touch (like for firmware and pci
> 	  config space)
> 	- directories should be associated with a kobject where it makes
> 	  sense (no nesting deep subdirectories without a kobject
> 	  present)

You have to stretch this a little for the power/ subdirectory every 
device gets.  The only kobject it corresponds to is the one in the 
device, which already corresponds to the parent directory.

Alan Stern

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