From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_NEOMUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 363B9C48BD5 for ; Tue, 25 Jun 2019 10:51:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0A86920644 for ; Tue, 25 Jun 2019 10:51:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="OqKckeaC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729959AbfFYKvN (ORCPT ); Tue, 25 Jun 2019 06:51:13 -0400 Received: from pandora.armlinux.org.uk ([78.32.30.218]:50514 "EHLO pandora.armlinux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726521AbfFYKvN (ORCPT ); Tue, 25 Jun 2019 06:51:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=B4pLAXyDPdI8tWudLeNzlKsY9ks2pK9PyrJ5hr7IryA=; b=OqKckeaCN4sEg3NvrAAopQHHy p/MUnhzE2Rs8+JKnTJnWFJALJb0xRvcKxAHgk3K2t2i5KSO1Ni3FizlFz4B/Z+q0wH31F5U8L22T3 6/IyCytoKeec2KnYFcJtpLsjHiHJz4Y2pT02Znk4Bg/AenoBuYGjVS/tSKCur7bt/oACz4aFtwZp1 6PEzYC1UlmkLYm1TqihKjDLY+nJRZfjwFm7xKzACRqa5HRhiK3YmqOCuow1R66GMK064Hf4syylxQ MpesAgk9z4ktv8v9UVjHF9Dvk4+aK0cvjypvcQVMZ1bv/FS4aWKEBay3iBHDeuSRzZfuwSeblxABy F28vhKHtQ==; Received: from shell.armlinux.org.uk ([2001:4d48:ad52:3201:5054:ff:fe00:4ec]:58984) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1hfj2X-0005um-7v; Tue, 25 Jun 2019 11:51:05 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.89) (envelope-from ) id 1hfj2T-00079r-Lv; Tue, 25 Jun 2019 11:51:01 +0100 Date: Tue, 25 Jun 2019 11:51:01 +0100 From: Russell King - ARM Linux admin To: Parshuram Raju Thombare Cc: Andrew Lunn , "nicolas.ferre@microchip.com" , "davem@davemloft.net" , "f.fainelli@gmail.com" , "netdev@vger.kernel.org" , "hkallweit1@gmail.com" , "linux-kernel@vger.kernel.org" , Rafal Ciepiela , Anil Joy Varughese , Piotr Sroka Subject: Re: [PATCH v4 4/5] net: macb: add support for high speed interface Message-ID: <20190625105101.xvcwgt3jh5pk7p2x@shell.armlinux.org.uk> References: <1561281419-6030-1-git-send-email-pthombar@cadence.com> <1561281806-13991-1-git-send-email-pthombar@cadence.com> <20190623150902.GB28942@lunn.ch> <20190624131307.GA17872@lunn.ch> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 25, 2019 at 08:26:29AM +0000, Parshuram Raju Thombare wrote: > Hi Andrew, > > >What i'm saying is that the USXGMII rate is fixed. So why do you need a device > >tree property for the SERDES rate? > This is based on Cisco USXGMII specification, it specify USXGMII 5G and USXGMII 10G. > Sorry I can't share that document here. The closed nature of the USXGMII spec makes it very hard for us to know whether your implementation is correct or not. I have some documentation which suggests that USVGMII is a USXGMII link running at "5GR" rate as opposed to USXGMII running at "10GR" rate. So, I think 5G mode should be left out until it becomes clear that (a) we should specify it as USXGMII with a 5G rate, or as USVGMII. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up