linux-kernel - Re : [PATCH] base: add sysfs socs info

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Date:	Wed, 15 Dec 2010 15:45:24 +0000 (GMT)
From:	Didier Lagard <didier.lagard@...oo.fr>
To:	linux-kernel@...r.kernel.org,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Patrice VILCHEZ <patrice.vilchez@...el.com>
Subject: Re : [PATCH] base: add sysfs socs info

<plagnioj@...osoft.com> a écrit :
>
> this provide an easy way to register
> soc information
> 
> arch, family, model, id, revision
> 
> as this for at91sam9g20
> 
> $ cat /sys/devices/system/soc/soc0/arch
> current
> $ cat /sys/devices/system/soc/soc0/family
> at91
> $ cat /sys/devices/system/soc/soc0/id
> at91sam9g20
> $ cat /sys/devices/system/soc/soc0/model
> 0x00000000019905a0
> $ cat /sys/devices/system/soc/soc0/revision
> 1.1

Ouch, I've never seen so few explanations when it comes to add a new ABI...

Can you explain why this is needed at all ? How can it be usefull for an application for example ? Why make it a device ?

I mean there are plenty of SoC supports in the kernel (take a look to arch/arm) and none of them need that so far.

So at least we can expect some motivations to include this stuff in mailine.

Bye.


      
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