Messages in this thread | | | Date | Thu, 15 Mar 2012 07:53:29 +0100 | From | Lothar Waßmann <> | Subject | Re: [PATCH v1 1/5] ARM: imx28: add basic dt support |
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Hi,
Dong Aisheng writes: > On Wed, Mar 14, 2012 at 10:16:43PM +0800, s.hauer@pengutronix.de wrote: > > On Wed, Mar 14, 2012 at 08:45:23PM +0800, Dong Aisheng wrote: > > > On Wed, Mar 14, 2012 at 01:23:51AM +0800, Grant Likely wrote: [...] > > > But it seems this needs pass mac address to fec driver via platforom data which is > > > not friendly to dt. > > > > > > Another way may be changing fec driver to get the fixed part of mac address(first > > > two bytes) from device tree and read the left dynamical part from otp which i'm not > > > sure is better enough. > > > > > > BTW, filling with zeros seems not work since it's invalid mac address. > > > > Yes, that's the idea of using this value... > > > But comparing to use an invalid value, why not just do not define that > local-mac-address property? > Because a MAC address is by definition a GLOBALLY UNIQUE IDENTIFIER which is contrary to coding a "valid" default value for it somewhere! The owner of a certain MAC address range (OUI) is responsible for ensuring the uniqueness. Thus only they may assign a specific MAC address to a specific device.
Lothar Waßmann -- ___________________________________________________________
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