Messages in this thread | | | Subject | Re: [PATCH 1/2] ARM: kirkwood: proper retain MAC address workaround on DT ethernet | From | Benjamin Herrenschmidt <> | Date | Mon, 27 May 2013 19:38:31 +1000 |
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On Sun, 2013-05-26 at 22:06 +0200, Sebastian Hesselbarth wrote:
> good you mention it. I added Grant on Cc and will give a short > sum-up why I casted the const from property->value away here. > > Maybe I overlooked the API for modifying the DT property but as > far as I've seen - there is no API for modifying it. And yes, > you are right, it is kind of an abuse of DT here.
of_update_property(). That also makes sure that any notifiers is called and proc/device-tree is updated in the case where the property is new.
> As Kirkwoods loose their MAC address on clock gating, I was looking > for a place to store it early. (a) DT property "local-mac-address" > looked as a good place as it will allow the driver to find it without > any extra code. Of course, I am doing severaly sanity checks if it is > safe to overwrite it, i.e. no other MAC set, property is there, long > enough. > > If Grant also NACKs modifying the DT we basically have two more options > left for Kirkwood: (b) have MAC stored early in two global arrays in > board init and reference that from mv643xx_eth or (c) leave the clock > ungated unconditionally on all Kirkwoods. > > I can live with all three, just name it and I prepare a final patch set.
No, putting it in the DT makes sense, just use the right accessor.
Cheers, Ben.
> Sebastian > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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