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    SubjectRe: [PATCH v1 1/5] ARM: imx28: add basic dt support
    On Thu, Mar 15, 2012 at 02:53:29PM +0800, Lothar Waßmann wrote:
    > 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.
    >
    Yes, you're correct.
    So i propose to read the MAC address from MX28 OTP in fec driver instead of
    define it in device tree in my last mail.
    http://www.spinics.net/lists/arm-kernel/msg165040.html
    Do you have any comment on that way?

    Regards
    Dong Aisheng

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