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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 E6A01C04AAF for ; Sat, 18 May 2019 22:29:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7046320873 for ; Sat, 18 May 2019 22:29:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726501AbfERW3U (ORCPT ); Sat, 18 May 2019 18:29:20 -0400 Received: from mail-out.m-online.net ([212.18.0.10]:51899 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726407AbfERW3T (ORCPT ); Sat, 18 May 2019 18:29:19 -0400 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4560FR034Lz1rZcs; Sun, 19 May 2019 00:29:14 +0200 (CEST) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4560FQ6YfBz1qqkp; Sun, 19 May 2019 00:29:14 +0200 (CEST) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id 9qdS3V011wkJ; Sun, 19 May 2019 00:29:13 +0200 (CEST) X-Auth-Info: 9IvKERCA4vNrBchWXz2I7o7nIfny102Fx+723pU+nds= Received: from [IPv6:::1] (unknown [195.140.253.167]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Sun, 19 May 2019 00:29:13 +0200 (CEST) From: Marek Vasut Subject: Re: [PATCH V5] net: phy: tja11xx: Add TJA11xx PHY driver To: Andrew Lunn Cc: netdev@vger.kernel.org, Florian Fainelli , Guenter Roeck , Heiner Kallweit , Jean Delvare , linux-hwmon@vger.kernel.org References: <20190517235123.32261-1-marex@denx.de> <20190518141456.GK14298@lunn.ch> <20190518201251.GA30854@lunn.ch> Openpgp: preference=signencrypt Autocrypt: addr=marex@denx.de; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190518201251.GA30854@lunn.ch> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org On 5/18/19 10:12 PM, Andrew Lunn wrote: > On Sat, May 18, 2019 at 06:50:48PM +0200, Marek Vasut wrote: >> On 5/18/19 4:14 PM, Andrew Lunn wrote: >>> On Sat, May 18, 2019 at 01:51:23AM +0200, Marek Vasut wrote: >>>> Add driver for the NXP TJA1100 and TJA1101 PHYs. These PHYs are special >>>> BroadRReach 100BaseT1 PHYs used in automotive. >>> >>> Hi Marek >> >> Hello Andrew, >> >>>> + }, { >>>> + PHY_ID_MATCH_MODEL(PHY_ID_TJA1101), >>>> + .name = "NXP TJA1101", >>>> + .features = PHY_BASIC_T1_FEATURES, >>> >>> One thing i would like to do before this patch goes in is define >>> ETHTOOL_LINK_MODE_100baseT1_Full_BIT in ethtool.h, and use it here. >>> We could not do it earlier because were ran out of bits. But with >>> PHYLIB now using bitmaps, rather than u32, we can. >>> >>> Once net-next reopens i will submit a patch adding it. >> >> I can understand blocking patches from being applied if they have review >> problems or need to be updated on some existing or even posted feature. >> But blocking a patch because some future yet-to-be-developed patch is a >> bit odd. > > Hi Marek > > What i'm trying to avoid is an ABI change. By using > PHY_BASIC_T1_FEATURES you are saying the device support 100BaseT. It > does not. It supports 100BaseT1. I want to add 100BaseT1 first, so > your PHY does not change from 100BaseT to 100BaseT1, which could be > considered an ABI change. I would expect PHY_BASIC_T1_FEATURES , with T1 in the middle , would imply 100baseT1 , but maybe that's a misnomer . > I'm not suggesting blocking your patch for a long time. I'm already > 2/3 of the way doing the work. At the latest, i expect to have patches > submitted in the next few days. And then your driver can go in, using > this. So by end of next week, your driver can be in. But someone has to review your patches too, so that would add another few weeks. >>> I also see in the data sheet we should be able to correct detect its >>> features using register 15. So we should extend >>> genphy_read_abilities(). >> >> Which bits do you refer to ? > > Register 15, bit 7. This indicates the PHY can do 100BaseT1. I want to > double check with the 802.3 standard, but i expect this is part of the > standard. The PHY does only 100BaseT1 . -- Best regards, Marek Vasut