From: Timur Tabi <timur@codeaurora.org>
To: Florian Fainelli <f.fainelli@gmail.com>, Andrew Lunn <andrew@lunn.ch>
Cc: netdev@vger.kernel.org
Subject: Re: Need help with mdiobus_register and phy
Date: Sat, 15 Oct 2016 09:39:12 -0500 [thread overview]
Message-ID: <58023F90.5070302@codeaurora.org> (raw)
In-Reply-To: <535FE9FE-0D69-4874-BBF0-F0662C2157DB@gmail.com>
Florian Fainelli wrote:
> After reading the spec again, it does not appear to me that a PHY
> with PDOWN set is guaranteed or even required to respond to other
> register reads such as MII_PHYID1/2, in which case we may have to
> implement a MDIO bus reset routine which clears PDOWN for all PHYs
> that we detect(ed), or as Andrew suggested, utilize the matching by
> compatible string with the PHY OUI in it.
The 8031 does respond normally when PDOWN is set. However, the ID
registers are not available when the SerDes bus is also powered down.
I'll call this PDOWN+. This is a special power-down sequence that the
at803x driver does on suspend. See my other email for details.
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the
Code Aurora Forum, hosted by The Linux Foundation.
next prev parent reply other threads:[~2016-10-15 14:39 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-13 23:15 Need help with mdiobus_register and phy Timur Tabi
2016-10-14 4:06 ` Andrew Lunn
2016-10-14 11:38 ` Timur Tabi
2016-10-14 12:06 ` Andrew Lunn
2016-10-14 12:39 ` Timur Tabi
2016-10-14 12:49 ` Andrew Lunn
2016-10-14 12:49 ` Timur Tabi
2016-10-14 12:57 ` Andrew Lunn
2016-10-14 13:03 ` Timur Tabi
2016-10-14 13:18 ` Andrew Lunn
2016-10-14 13:28 ` Timur Tabi
2016-10-14 16:57 ` Timur Tabi
2016-10-14 17:25 ` Andrew Lunn
2016-10-14 18:30 ` Timur Tabi
2016-10-15 10:19 ` Florian Fainelli
2016-10-15 14:39 ` Timur Tabi [this message]
2016-10-15 18:02 ` Andrew Lunn
2016-10-15 18:28 ` Timur Tabi
2016-10-17 9:05 ` Zefir Kurtisi
2016-10-17 20:53 ` Timur Tabi
2016-10-18 10:31 ` Zefir Kurtisi
2016-10-18 12:40 ` Timur Tabi
2016-10-19 8:55 ` Zefir Kurtisi
2016-10-19 12:16 ` Timur Tabi
2016-10-20 12:55 ` Zefir Kurtisi
2016-10-21 7:44 ` Zefir Kurtisi
2016-10-21 11:19 ` Timur Tabi
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=58023F90.5070302@codeaurora.org \
--to=timur@codeaurora.org \
--cc=andrew@lunn.ch \
--cc=f.fainelli@gmail.com \
--cc=netdev@vger.kernel.org \
/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).