From: Dean Matsen <deanmatsen@earthlink.net>
To: Dan Malek <dan@embeddededge.com>
Cc: Eugene Surovegin <ebs@ebshome.net>, linuxppc-embedded@lists.linuxppc.org
Subject: Re: Ethernet PHY chip discovery not working on 855T with 971/972 chips
Date: Wed, 09 Jul 2003 09:39:40 -0700 [thread overview]
Message-ID: <3F0C454C.6080106@earthlink.net> (raw)
In-Reply-To: 3F0C2898.90508@embeddededge.com
Dan Malek wrote:
>
> Dean Matsen wrote:
>
>> Yes, I see we have no pullup on that line. We do dedicated HVAC
>> applications, so we
>> don't need to do this search.
>
>
> But.......the hardware is broken. The MDIO is supposed to be
> an open-drain with a pullup. I guess you may be lucky the
> ends of the connection are driving the line proplerly, but it
> could be luck that will run out someday.
>
>
> -- Dan
>
Well, I don't disagree there. We're going to investigate updating the
schematics for future products. Thanks for the input.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-07-09 16:39 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-09 2:17 Ethernet PHY chip discovery not working on 855T with 971/972 chips Dean Matsen
2003-07-09 2:29 ` Dean Matsen
2003-07-09 2:56 ` Eugene Surovegin
2003-07-09 5:21 ` Dan Malek
2003-07-09 5:50 ` Dean Matsen
2003-07-09 14:37 ` Dan Malek
2003-07-09 16:39 ` Dean Matsen [this message]
2003-07-09 20:54 ` Dean Matsen
2003-07-09 21:21 ` Wolfgang Denk
[not found] ` <20030711151834.GU17433@ip68-0-152-218.tc.ph.cox.net>
2003-07-11 15:43 ` Wolfgang Denk
2003-07-11 15:52 ` Tom Rini
2003-07-11 18:29 ` Wolfgang Denk
2003-07-11 18:50 ` Tom Rini
2003-07-11 19:18 ` Wolfgang Denk
2003-07-11 19:34 ` Tom Rini
2003-07-11 21:04 ` Wolfgang Denk
2003-07-14 6:21 ` Pantelis Antoniou
2003-07-14 7:58 ` Wolfgang Denk
2003-07-14 14:31 ` Tom Rini
2003-07-14 19:26 ` Wolfgang Denk
2003-07-15 15:04 ` Tom Rini
2003-07-11 23:21 ` Dean Matsen
2003-07-12 1:01 ` Paul Mackerras
2003-07-12 21:13 ` Dean Matsen
2003-07-12 21:54 ` Wolfgang Denk
2003-07-14 14:52 ` Tom Rini
2003-07-13 15:48 ` Dan Malek
2003-07-13 16:29 ` Roland Dreier
2003-07-14 20:49 ` Matt Porter
2003-07-15 5:08 ` Roland Dreier
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