Hi,

On our board= with i.MX27 processor, we have a Micrel 5-port Managed Ethernet switch (ks= z8895mq). When starting in normal MII mode, from the Barebox prompt, I can = get an IP address by executing the dhcp command.

When I change the switch’s mode to SPI (via hardw= are strapping), I’m not able to get an IP address anymore via DHCP. I= n this mode, one has to write to a register in the switch to make the switc= h start. So, within our startup code, I added some code to start the switch= . Reading back the register, I see that the bit is set, so I assume the swi= tch sould be running at that moment. However, when executing the dhcp comma= nd, I get “phy0: Autonegotiation timeout”.

That’s strange, because, when I boo= t to Linux kernel, the kernel starts up without any problem and gets an = IP address via DHCP. So in Linux, it’s doing OK.

Because it is working in Linux, I’m qu= ite sure the switch was started in a correct way.

I don’t understand why Barebox is unable to con= tact the switch while there’s no problem in Linux to do the same. Any= one any idea on this problem ?

Thanks in advance !<= o:p>

<= p class=3DMsoNormal>Filip

3D"te=

<= tr>

&= nbsp;

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<= b>&nb= sp; Filip Vanalme
Senior Development Engineer

Tel. +32 51 30.30.45	Fax +32 51 33.18.86
www.televic.com<= /span>

Televic NV • Leo B= ekaertlaan 1 • 8870 Izegem • Belgium Company numbe= r 0402.757.955 • RPR Kortrijk