From mboxrd@z Thu Jan  1 00:00:00 1970
From: maxime.coquelin-nonst@stericsson.com (Maxime Coquelin)
Date: Mon, 28 Feb 2011 11:28:15 +0100
Subject: [PATCHv5 0/3] Introduce the /proc/socinfo and use it to export
	OMAP data
In-Reply-To: <20110216115729.GA29817@besouro.research.nokia.com>
References: <1273587331-24604-1-git-send-email-eduardo.valentin@nokia.com>
	<AANLkTin7vRMreG3hOAk95MYZUCV-Kr6ac7gD7jgvX6Gf@mail.gmail.com>
	<20110216115729.GA29817@besouro.research.nokia.com>
Message-ID: <4D6B78BF.1020102@stericsson.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hello Eduardo,

On 02/16/2011 12:57 PM, Eduardo Valentin wrote:
> Hello Linus,
>
> On Tue, Feb 15, 2011 at 01:58:00PM +0100, ext Linus Walleij wrote:
>> 2010/5/11 Eduardo Valentin<eduardo.valentin@nokia.com>:
>>
>>> Here is the version 5 of the change to export OMAP data to userspace
>>> (name, revision, id code, production id and die id).
>>>
>>> Basically, this version is still attempting to create a new file under /proc.
>>> It is the /proc/socinfo, which should be used to export bits which are SoC specific
>>> (not CPU related, nor machine related).
>>>
>>> So, differences between previous version are:
>>> - merged patch 02/04 with 03/04 to avoid compilation breakages.
>>> - simplified the seq_file usage by using the single_open and single_release functions
>>> - exported a function to register a seq_operation .show callback
>>> - adapted the changes accordingly
>>>
>>> As usual, comments are welcome.
>> Eduardo, what has happened to this patchset?
> Got forgotten :-(. Unfortunately I didn't pushed it hard enough.
  I propose to refactor your patchset, moving from procfs to sysfs.
>> Do you want help in picking it up and try to polish it up?
> Yeah, but it would need a refactoring. IIRC, result of last discussion was that
> we should not mess with /proc. So, maybe moving back to something under sysfs.
> Perhaps /sys/devices/soc or so?
About the location of this new sysfs entry, where do you think it should be?
I propose to create a new directory named "soc" in /sys/devices/system/.

As platform vendors have several/different kind of IDs to export to 
sysfs, I propose each vendor to create file entries related to their IDs 
(eg. /sys/devices/system/soc/idcode for OMAP platforms).

However, I think we should have a common file entry to export the unique 
ID of the platforms. Indeed, user-space applications should have a 
unified way to get this kind of ID, regardless of the platform (eg. 
/sys/devices/system/soc/unique_id).

Do you agree with my proposal?

Thanks for your comments.

Regards,

Maxime Coquelin