[U-Boot] [PATCH] sunxi: use random parts of SID to set ethaddr

[Ian Campbell]

On Sat, 2014-06-14 at 08:59 +0200, Hans de Goede wrote:
> From: Jonathan Liu <net147 at gmail.com>
> 
> Similar to the USB NIC found on OMAP5uEVM, PandaBoard and BeagleBoard-XM
> boards, the sunxi SoCs have a NIC onboard without an embedded MAC address.
> 
> Just like the omap used on these boards, the sunxi SoCs do have a unique chip
> id, in the form of the 128 bit SID register:
> http://linux-sunxi.org/SID_Register_Guide
> 
> So mimick the BeagleBoard-XM board code (commit 548a64d8) and use the chip id
> to generate a unique fixed MAC address.
> 
> We check for the SID not being all 0, since some early A20 batches
> shipped without having there SID programmed.
> 
> Note we use specific parts of the 128 bits, since some parts indicate the
> SoC family / revision, and thus are fixed. The algorithm for this was taken
> from the linux-sunxi.org kernels.
> 
> Signed-off-by: Jonathan Liu <net147 at gmail.com>
> [hdegoede at redhat.com: Expanded the commit message with some more info]
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>

Acked-by: Ian Campbell <ijc at hellion.org.uk>