[U-Boot] [PATCH 0/3][v3] Update MAC address in "ethernet" node of Linux device tree

[Prabhakar Kushwaha]

The MAC addresses get fixed in the device tree for "ethernet" nodes
is by using trailing number behind "ethernet" found in "/aliases".
It may not be necessary for the "ethernet" nodes to be sequential.
There can be gaps in between or any ethenet node disabled.

Reason for gaps is because the available ethernet port are based on
SerDes protocol chosen for the SoC. Usually Linux device tree 
contains "ethernet" node for all possible ports supported by SoC
for e.g. LS1046A. Where based on SerDes protocol some "ethernet" 
ports are unavailable hence non-sequential. 

This patch-set provide way to fetch MAC addr sequentially from env
variables and also create hole in "ethernet" node (disable) based
on SerDes protocol for LS1046ARDB.

This patch-set provide a support to fetch MAC addr sequentially
from env and apply them to "ethernet" nodes in the order they appear
in device tree only if "ethernet" is not "disabled"

It also disables "ethernet" nodes in device tree based ethernet port
availability  in the selected SerDes protocol.
Currently the changes are done foe LS1046A. This has been added as a
compile time option for now, to keep backward compatibility.

The associated documentation is also updated in the README.

Other platforms should also follow same approach. 

Prabhakar Kushwaha (3):
  common: Fix-up MAC addr in dts by fetching env variable serially
  arm: Add support of updating dts before fix-up
  boards: ls1046ardb: disable unavailable "ethernet" node in dts

 README                           |  9 +++++++
 arch/arm/lib/bootm-fdt.c         | 12 ++++++++++
 board/freescale/ls1046ardb/eth.c | 51 ++++++++++++++++++++++++++++++++++++++++
 common/fdt_support.c             | 25 ++++++++++++++++----
 include/configs/ls1046ardb.h     |  2 ++
 include/fdt_support.h            |  3 +++
 6 files changed, 98 insertions(+), 4 deletions(-)

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2.7.4