From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Philip A. Prindeville" Subject: Re: Linux support for 802.3af? Date: Fri, 12 Mar 2010 18:11:07 -0700 Message-ID: <4B9AE62B.6050502@redfish-solutions.com> References: <4B9AD5CA.7000303@redfish-solutions.com> <1268440985.7439.23.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Ben Hutchings Return-path: Received: from mail.redfish-solutions.com ([66.232.79.143]:38864 "EHLO mail.redfish-solutions.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935357Ab0CMBLj (ORCPT ); Fri, 12 Mar 2010 20:11:39 -0500 In-Reply-To: <1268440985.7439.23.camel@localhost> Sender: netdev-owner@vger.kernel.org List-ID: 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?