From: "Philip A. Prindeville" <philipp_subx@redfish-solutions.com>
To: Ben Hutchings <bhutchings@solarflare.com>
Cc: netdev@vger.kernel.org
Subject: Re: Linux support for 802.3af?
Date: Fri, 12 Mar 2010 18:11:07 -0700 [thread overview]
Message-ID: <4B9AE62B.6050502@redfish-solutions.com> (raw)
In-Reply-To: <1268440985.7439.23.camel@localhost>
On 03/12/2010 05:43 PM, Ben Hutchings wrote:
> On Fri, 2010-03-12 at 17:01 -0700, Philip A. Prindeville wrote:
>> I was looking at this Marvell-based 4-port PCI card with PoE and
>> thinking it would be handy for powering cameras and ip-phones, but don't
>> remember seeing any kernel support for 802.3af...
>>
>> http://www.korenix.com/jetcard-PoE_Universal_PCI_Card-2215-overview.htm
>>
>> There's no support for 802.3af, right?
>
> The standard MDIO ioctls can be used to access registers 11 and 12 on
> PHYs with integrated PSE functionality. There is no way of indicating
> whether a PHY has such functionality, but a flag for this could be added
> to the mdio_support field of struct ethtool_cmd.
>
> Ben.
Well, there's more to it than that, right?
There's a software state machine that's required to go through the handshake, there's prioritization and power budgeting, etc. Yes?
What am I missing?
next prev parent reply other threads:[~2010-03-13 1:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-13 0:01 Linux support for 802.3af? Philip A. Prindeville
2010-03-13 0:43 ` Ben Hutchings
2010-03-13 1:11 ` Philip A. Prindeville [this message]
2010-03-13 4:40 ` Ben Hutchings
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