[U-Boot-Users] u-boot 1.1.1 & Intel LXT972A

Knowledge Seeker talibalm at hotmail.com
Wed Jul 21 01:38:37 CEST 2004

Wolfgang writes "I recommend to check your clocks (both in software
and in hardware)"

I am a newbie, so please help me out

- For hardware clock, need to check MDIO clock signal and it should be
at 2.5 MHz ? (is this what I ask my hardware guy)

- For software clock, I am looking at cpu/mpc8xx/fec.c file (around
line # 385), line is

fecp->fec_mii_speed = ((bd->bi_intfreq + 4999999) / 5000000) << 1;

which evaluates to 2, is this suppose to evaluate 2.5 MHz ?

Please explain, so that I can clear my concept and solve my problem.

Abu Sana

--- Wolfgang Denk <wd at denx.de> wrote:
> Hello <???>,
> [a realname would definitely be fine.]
> In message <20040720183933.63696.qmail at web50502.mail.yahoo.com> you
> wrote:
>> I have LXT972A on 852T. From u-boot, I have set mac, ip and
>> When I try to ping a ip address on LAN. I get "TX timeout"
> In nearly all cases of "TX timeout" I've seen so far the problem was
> cased by bad clocks; I recommend to check your clocks (both in
> software and in hardware).
> Best regards,
> Wolfgang Denk
> -- 
> Software Engineering: Embedded and Realtime Systems, Embedded Linux
> Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email:
wd at denx.de
> In C we had to code our own bugs, in C++ we can inherit them.

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