linux-kernel - Re: How to add a device file to sysfs?

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Message-ID: <20061103045235.GA24467@kroah.com>
Date:	Thu, 2 Nov 2006 20:52:35 -0800
From:	Greg KH <greg@...ah.com>
To:	Aubrey <aubreylee@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How to add a device file to sysfs?

On Tue, Oct 31, 2006 at 01:30:36PM +0800, Aubrey wrote:
> Hi all,
> 
> When a misc device file is registered, there are two files under my
> own class directory:
> 
> /sys --> class --> misc --> myprog --> dev
>                                                   --> uevent
>                                                   --> myprog_show (to be 
>                                                   added)
> 
> Now, my question is, is it possbile to add the third file
> "myprog_show" under "myprog" directory without modify any common code?

Yes.

> I've read the doc under linux-2.6.x/Documentation, I can add it to
> some other directory, but not found a way to add it to my own
> directory.

After misc_register() has been successfully called, the variable "class"
will be set in the miscdevice structure.  Use that pointer to call
class_device_create_file() to create your new file in this directory.

Hope this helps,

greg k-h
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