Re: [PATCH] ARM: dts: Revert disabling of smc91x for n900

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* Tony Lindgren <tony@xxxxxxxxxxx> [150106 12:01]:
> * Aaro Koskinen <aaro.koskinen@xxxxxx> [150106 11:47]:
> > Hi,
> > 
> > On Tue, Jan 06, 2015 at 08:59:03AM -0800, Tony Lindgren wrote:
> > > * Pavel Machek <pavel@xxxxxx> [150106 00:03]:
> > > > On Mon 2015-01-05 15:02:29, Tony Lindgren wrote:
> > > > > Revert "ARM: dts: Disable smc91x on n900 until bootloader
> > > > > dependency is removed". We've now fixed the issues that
> > > > > caused problems with uninitialized hardware depending on
> > > > > the bootloader version. Mostly things got fixed with
> > > > > the following commits:
> > > > > 
> > > > > 9a894953a97b ("ARM: dts: Fix bootloader version dependencies by muxing n900 smc91x pins")
> > > > > 7d2911c43815 ("net: smc91x: Fix gpios for device tree based booting")
> > > > > 
> > > > > Note that this only affects the early development boards
> > > > > with Ethernet that we still have in a few automated boot
> > > > > test systems.
> > > > > 
> > > > > Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
> > > > 
> > > > Normally, the early development boards should have separate dts file
> > > > (then include common parts), no?
> > > 
> > > In this case it won't matter. The GPMC hardware is there, the probe
> > > just fails if no smsc91x is found.
> > >  
> > > > Could you at least add a note to the dts file what is it? Because I
> > > > always thought it is a bug.
> > > 
> > > Sure, updated patch below. Can somebody please test boot it on
> > > a production n900 too to make sure it no longer causes issues?
> > 
> > Seems to work fine with normal n900.
> > 
> > Tested-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
> 
> OK good to hear, thanks for testing.
>  
> > I also tested with a development board, eth0 seemed to appear,
> > but couldn't configure the MAC address with busybox ifconfig.
> > How should it be done, I guess the interface does not have any
> > MAC by default?
> 
> You need to write the eeprom with ethtool from Linux, something
> like this:
> 
> Run u-boot/tools/gen_eth_addr to generate a random local mac,
> then swap the bytes for it for big endian. Enter them into a
> file with hexedit in big endian order. Then just do:
> 
> # cat mac | ethtool -E eth0 offset 0x40 length 6
> 
> Then ethtool -e eth0 should show you the configuration.

Oh and I have some u-boot patches that I'll post that allow
booting n900 with bootz and to use smsc91x tftp booting. I'll
try to post those shortly..

Regards,

Tony
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