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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 867C6C433E2 for ; Mon, 18 May 2020 09:26:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6753E20709 for ; Mon, 18 May 2020 09:26:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="DCLJDuGd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726919AbgERJ0I (ORCPT ); Mon, 18 May 2020 05:26:08 -0400 Received: from www.zeus03.de ([194.117.254.33]:58852 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726302AbgERJ0I (ORCPT ); Mon, 18 May 2020 05:26:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=sang-engineering.com; h= date:from:to:cc:subject:message-id:references:mime-version :content-type:in-reply-to; s=k1; bh=A/gIwIbzzT3voFbwbkkGYk2914xt 750bCNgjeYYwG4U=; b=DCLJDuGd6Lj3/JoYClXSkMfsnu44ooFH2veTmmfv58wE Si1yB4o9j576NoXHeOMDvheD6Dr1yNYrnlSL+R3Lmh3UeMWIMMFRo5bEnSwsXfXg WqcDVFPiSnoAfAzBzHAPQPIt0iYnusl46GnymUdlLqyVApFvd3skUS+/Johvh5E= Received: (qmail 947633 invoked from network); 18 May 2020 11:26:05 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 18 May 2020 11:26:05 +0200 X-UD-Smtp-Session: l3s3148p1@WxWOwOilRKEgAwDPXwfCAIWBZdj99x2z Date: Mon, 18 May 2020 11:26:01 +0200 From: Wolfram Sang To: "Lad, Prabhakar" Cc: Lad Prabhakar , Geert Uytterhoeven , Jens Axboe , Rob Herring , Ulf Hansson , Sergei Shtylyov , "David S. Miller" , Wim Van Sebroeck , Guenter Roeck , linux-ide@vger.kernel.org, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , LKML , linux-i2c@vger.kernel.org, Linux MMC List , netdev , Linux-Renesas , linux-watchdog@vger.kernel.org Subject: Re: [PATCH 03/17] ARM: dts: r8a7742: Add I2C and IIC support Message-ID: <20200518092601.GA3268@ninjato> References: <1589555337-5498-1-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com> <1589555337-5498-4-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com> <20200515171031.GB19423@ninjato> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="2oS5YaxWCcQjTEyO" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org --2oS5YaxWCcQjTEyO Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > > However, both versions (with and without automatic transmission) are > > described with the same "renesas,iic-r8a7742" compatible. Is it possible > > to detect the reduced variant at runtime somehow? > > > I couldn't find anything the manual that would be useful to detect at run= time. >=20 > > My concern is that the peculiarity of this SoC might be forgotten if we > > describe it like this and ever add "automatic transmissions" somewhen. > > > Agreed. Well, I guess reading from a register which is supposed to not be there on the modified IP core is too hackish. Leaves us with a seperate compatible entry for it? --2oS5YaxWCcQjTEyO Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAl7CVKUACgkQFA3kzBSg KbYDCA//fNp372/9fj/gtObfrZa0TxllW2uISdUH112lOK1XJS+XSvLkHbsTH9Gt x29LZpIF2R6xhl3wAQsARCEvWQ+ln6mhtYwIR6NBgmH/FrJ64ck0J1TW/MIBBP9/ ljAi8HjzIwg5lS/u8iw7qJQBehFNjk7PMTye7G09CjQTq9VRn2fZoAdlu3jqQci9 0KUneHGduxQA1r7hK2wl5xPH423IyaUGqhXvPSRyzfZu0fUaINAE/LIfstX41YiU Wj9lcT8gDQeNGwhRPhvokRqv2q9sFJZ4oT3mrpbtKjICEGQxRVqZbSw7XqjE+ntl Lkgi68z1RFja7drjGHXqRR7P7R+AT2vuD+S411fObxpl81GIhUTHKhcK7GC7fs5N QrSWGqP+gFSgoU54062r33GLSjH9jNl2xjQlNwafJHzkHisIEH6DYA/3QDf6CdPB OWqn8VNfeZKf+RTsJ+0pHuq4CLhBLDLLllhx1htpb/h1WUM8j8Y7OM3k1ltoJs4Y 3HOpjHGVBWln/xYbGQwqQbZm/IhEDRIgOvU1IeaHQIXLJSj022gTD8DDEr5DQMd9 hi7sPPL1StfvLKyJPeSTl3pfxumunmztsbFNCKpYpF7B4hbEyOL266sguAUoc+GZ qD4du02x1/QSMlilqkZaLWYWuExQToKLu/u1TTDVLDzpXr0WNNM= =+frY -----END PGP SIGNATURE----- --2oS5YaxWCcQjTEyO--