From: "David Müller (ELSOFT AG)" <d.mueller@elsoft.ch>
To: "David Müller (ELSOFT AG)" <d.mueller@elsoft.ch>
Cc: andrew may <acmay@acmay.homeip.net>, Armin <akuster@pacbell.net>,
Stefan Roese <stefan.roese@esd-electronics.com>,
linuxppc-embedded@lists.linuxppc.org
Subject: Re: 405 MII-PHY communication problem (was: Re: PPC405gp enet Soft Reset)
Date: Tue, 19 Feb 2002 13:05:44 +0100 [thread overview]
Message-ID: <3C723F98.7050402@elsoft.ch> (raw)
In-Reply-To: 3C6A25BC.7010704@elsoft.ch
Hi
The problem with the even-numbered PHY register addresses seems to be
caused by a too weak or totally missing pullup resistor on the MDIO line.
David Müller (ELSOFT AG) wrote:
>
> Hi
>
> andrew may wrote:
>
>> On Mon, Feb 11, 2002 at 12:55:05PM +0100, David Müller (ELSOFT AG) wrote:
>>
>>> Hi
>>>
>>> andrew may wrote:
>>>
>>>> Here is a log from ppcboot since it is easy to test this there
>>>> without doing
>>>> a kernel build. My phy is at address 0x1f.
>>>>
>>>> => mii read 0x1 2
>>>> 07FF
>>>> => mii read 0x1 3
>>>> read err 3
>>>> a2: read: EMAC_STACR=0xffffc023, i=2
>>>> Error reading from the PHY
>>>> 07FF
>>>>
>>>>
>>> I'm seeing this error too on our boards. But i'm not certain, if it's a
>>> problem of the MII controller in the 405 or a problem of the LXT971.
>>> What revision of the 405 do you have? What clock frequency your 405
>>> run at?
>>>
[old stuff deleted]
Dave
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2002-02-19 12:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-08 3:17 PPC405gp enet Soft Reset andrew may
2002-02-08 10:03 ` Stefan Roese
2002-02-08 18:35 ` andrew may
2002-02-08 10:53 ` Armin
2002-02-08 20:01 ` andrew may
2002-02-11 11:55 ` David Müller (ELSOFT AG)
2002-02-12 0:49 ` andrew may
2002-02-13 8:37 ` 405 MII-PHY communication problem (was: Re: PPC405gp enet Soft Reset) David Müller (ELSOFT AG)
2002-02-13 15:15 ` Stefan Roese
2002-02-19 12:05 ` David Müller (ELSOFT AG) [this message]
2002-02-19 12:21 ` Stefan Roese
2002-02-22 0:56 ` andrew may
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3C723F98.7050402@elsoft.ch \
--to=d.mueller@elsoft.ch \
--cc=acmay@acmay.homeip.net \
--cc=akuster@pacbell.net \
--cc=linuxppc-embedded@lists.linuxppc.org \
--cc=stefan.roese@esd-electronics.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).