From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gary Thomas Subject: Re: Marvell 88E609x switch? Date: Fri, 27 Feb 2009 08:26:59 -0700 Message-ID: <49A80643.5050208@mlbassoc.com> References: <49A5B877.8080403@mlbassoc.com> <20090226151107.GN17040@xi.wantstofly.org> <49A6B991.2090703@mlbassoc.com> <20090226155726.GO17040@xi.wantstofly.org> <49A73E00.7050406@mlbassoc.com> <20090227011903.GS17040@xi.wantstofly.org> <49A7DBA2.8060605@mlbassoc.com> <20090227125211.GV17040@xi.wantstofly.org> <49A7E920.2020601@mlbassoc.com> <20090227142548.GA17040@xi.wantstofly.org> <20090227151815.GA7686@oksana.dev.rtsoft.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1251 Content-Transfer-Encoding: 7bit Cc: Lennert Buytenhek , Kumar Gala , Andy Fleming , netdev@vger.kernel.org, Li Yang To: avorontsov@ru.mvista.com Return-path: Received: from 137-67-76-76.skybeam.com ([76.76.67.137]:4592 "EHLO mail.chez-thomas.org" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753522AbZB0P1N (ORCPT ); Fri, 27 Feb 2009 10:27:13 -0500 In-Reply-To: <20090227151815.GA7686@oksana.dev.rtsoft.ru> Sender: netdev-owner@vger.kernel.org List-ID: Anton Vorontsov wrote: > On Fri, Feb 27, 2009 at 03:25:48PM +0100, Lennert Buytenhek wrote: >> On Fri, Feb 27, 2009 at 06:22:40AM -0700, Gary Thomas wrote: >> >>>>> However, the network subsystem still can't locate it. It may be >>>>> a complication of the OF stuff and how the [gianfar] network >>>>> device knows what PHY to look at. >>>>> >>>>> starting network interfaces... >>>>> 24520:01 not found >>>>> eth0: Could not attach to PHY >>>> It's correct that eth0 should not associate with a PHY -- since the >>>> MAC connects to the switch chip over GMII/RGMII/SGMII, there is no >>>> PHY involved. >>> Yes, but it's expecting to be able to talk to the PHYLIB layer >>> and ask things like speed, duplex, link state, etc. >>> >>>> Is the gianfar driver refusing to up the interface without a PHY? >>>> It shouldn't do that -- IMHO it's perfectly fine to not have a PHY >>>> on your ethernet MAC. >>> It seems so, yes. I tried disabling the PHY connection in the OF >>> tree and now eth0 doesn't even try to come up :-( >> gianfar authors/maintainers: is there a way of using gianfar purely >> as a (R)(G)MII transport, i.e. without it trying to talk to a PHY? >> Gary is trying to use it to just pass packets to another >> (R)(G)MII-speaking chip that doesn't have a PHY interface, but gianfar >> seems to bail out if you don't give it a PHY to talk to. > > You can use fixed-link property in the device tree, and CONFIG_FIXED_PHY > driver. See arch/powerpc/boot/dts/mpc8349emitx.dts as an example, and > Documentation/powerpc/dts-bindings/fsl/tsec.txt for the fixed-link's > fields meaning. > Yes, thanks, that seems to work. I can at least now get eth0 starting to come up - still problems with the actual switch. Can you give me some guidance on my question (linuxppc-devel list 2009-02-26) with subject 'OF -> platform_device'? This is needed in order to use this switch and the DSA layer. Thanks -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------