From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-in-07.arcor-online.net (mail-in-07.arcor-online.net [151.189.21.47]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.arcor.de", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTP id B8E70DDE18 for ; Thu, 24 May 2007 01:56:02 +1000 (EST) In-Reply-To: <1B5F013528140F45B5C671039279CA5701BBBDE3@NANUK.pc.tundra.com> References: <1B5F013528140F45B5C671039279CA5701BBBDE3@NANUK.pc.tundra.com> Mime-Version: 1.0 (Apple Message framework v623) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <30282286f39c1489db7ad5b05acbc1bd@kernel.crashing.org> From: Segher Boessenkool Subject: Re: TSI ethernet PHY question Date: Wed, 23 May 2007 17:55:45 +0200 To: "Alexandre Bounine" Cc: linuxppc-dev list , David Gibson List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , > On power up, because this pin is pulled high by the LED, the > TXC_RXC_DELAY mode is enabled, causing a 1.9ns delay between the clock > and data on the GMII interface. Tsi109 could not operate properly with > this delay. The TXC_RXC_DELAY mode has to be disabled by software. > > If the Quality/TXC_RXC_DELAY pin is left not connected PHY will work in > normal mode without delay and therefore the workaround is not required. So it is a board-specific workaround. > I think that for situations like one on the Holly board we may need > board-specific hooks which modify normal initialization. As in our > case: > no LED - no trouble. Should be initiated from the platform code yes; it could be as simple as passing a flag to the init function. > -----Original Message----- Don't top-post :-) Segher