net: fec_mpc52xx: Read MAC address from device-tree

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Until now, the MPC5200 FEC ethernet driver relied upon the bootloader
(U-Boot) to write the MAC address into the ethernet controller
registers. The Linux driver should not rely on such a thing. So
lets read the MAC address from the DT as it should be done here.

The following priority is now used to read the MAC address:

1) First, try OF node MAC address, if not present or invalid, then:

2) Read from MAC address registers, if invalid, then:

3) Log a warning message, and choose a random MAC address.

This fixes a problem with a MPC5200 board that uses the SPL U-Boot
version without FEC initialization before Linux booting for
boot speedup.

Additionally a status line is now be printed upon successful
driver probing, also displaying this MAC address.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Anatolij Gustschin <agust@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Stefan Roese 2013-02-12 03:05:38 +00:00 • committed by David S. Miller

parent af32de0ecd

commit db98f08188

1 changed files with 38 additions and 24 deletions

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drivers/net/ethernet/freescale/fec_mpc52xx.c

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