Sequoia EMAC only works if u-boot initializes it?
jwboyer at linux.vnet.ibm.com
Tue Nov 27 03:08:43 EST 2007
On Mon, 26 Nov 2007 10:59:35 -0500
"Steven A. Falco" <sfalco at harris.com> wrote:
> I have noticed odd behavior on a Sequoia board. Kernel is built from
> DENX git, ARCH=powerpc, 220.127.116.11.
> Sequence that works:
> 1) In u-boot, do "dhcp" (this initializes the PHY)
> 2) Boot linux from flash
> 3) ifconfig eth0 192.168.0.101 netmask 255.255.255.0 up
> Ethernet is now functional, and I can ping the Sequoia (and it can ping
> my host)
> Sequence that does not work:
> 1) Boot linux from flash without letting u-boot touch eth0
> 2) ifconfig eth0 192.168.0.101 netmask 255.255.255.0 up
> Ethernet appears to come up, but it is not functional. I.e. I get
> "eth0: link is up, 100 FDX, pause enabled" but I cannot ping the board,
> and the board cannot ping my host.
> So, the kernel appears to be missing some initialization that u-boot
There are some PHY patches from Valentine that Ben needs to send to
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