linux-kernel - Re: [RFC] [PATCH] Device Tree on ARM platform

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Message-ID: <4A1DA24D.5000101@freescale.com>
Date:	Wed, 27 May 2009 15:27:57 -0500
From:	Timur Tabi <timur@...escale.com>
To:	David Miller <davem@...emloft.net>
CC:	scottwood@...escale.com, rmk+lkml@....linux.org.uk,
	jacmet@...site.dk, r.schwebel@...gutronix.de,
	devicetree-discuss@...abs.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.arm.linux.org.uk, yuan-bo.ye@...orola.com
Subject: Re: [RFC] [PATCH] Device Tree on ARM platform

David Miller wrote:

> It depends.  Some devices have EEPROM's that store the permanently
> assigned MAC address, some have NVRAM for this, and yet other's put it
> into the PCI ROM.

Well, I specifically said "isn't already programmed in the hardware".  I wasn't talking about just the NIC.  

> Some platforms that have real OF device trees often do not put the
> permanent MAC address into the EEPROM or NVRAM even if it is
> customary to do so on a particular device.  The MAC has to be
> obtained from the OF device tree.

Sorry, you're not answering my question.  I asked what do drivers do when the MAC address is not in the OF tree, and it is not programmed in hardware (any hardware).

-- 
Timur Tabi
Linux kernel developer at Freescale
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