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=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 0D402C433DF for ; Mon, 18 May 2020 08:59:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0F812086A for ; Mon, 18 May 2020 08:59:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="JUwzz0rr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726428AbgERI7Z (ORCPT ); Mon, 18 May 2020 04:59:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34268 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726180AbgERI7Y (ORCPT ); Mon, 18 May 2020 04:59:24 -0400 Received: from mail-oi1-x244.google.com (mail-oi1-x244.google.com [IPv6:2607:f8b0:4864:20::244]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B02EAC061A0C; Mon, 18 May 2020 01:59:24 -0700 (PDT) Received: by mail-oi1-x244.google.com with SMTP id l6so2485574oic.9; Mon, 18 May 2020 01:59:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=LYV5EXh8n5rFl/NTMi7Ga5qcFteCzV/5Bynz9/j/gws=; b=JUwzz0rrL4NlaPHDGnOL5OqO9C4s6vqDx6DD7xWQcMzu0te7kTNTmH3ttNmPdTU1Ad 1YCOXlK95i1Wkry3f946HZmHLu4pIxHK1m0dFLdhBbXiV4mOgqLY7uht6OjBH5jcdLni s0oVIEc+rGoTG4C0ARpq7T5ZydTTubYgGXaoSuTXL5IiVDsr+5Mw6/N5DVKpLCJYy+6I J3xSSiyMSb4BVy7fCBzvEb0om2pF1v91PQpcbGrYyhfmwKlZT8MzpukS3lwdyNhBBBGf FGYV0MtyHMOPQtoHXB3qIUwEngtXD6dR2O6h0R4JyqiNPNtFc0uuSQ95r8ntCOCpEX9o 5DMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=LYV5EXh8n5rFl/NTMi7Ga5qcFteCzV/5Bynz9/j/gws=; b=Q5HX5Cpgxqvwn9PUCedBcLK1VJ6AcHLaYv18RTZTuLjybFaY+Hm2vdc/wMMGW+0Qku FXfP1j1DGdEOH/D+K+PqnlQW9pdKgCtLRmM4XoZtl3QGE0c/3FgEWOPGbEiVfxnR7kh3 zpcPfZyblXh3Vj3M7LI/eRymM9kdCzawiC5HJHhNSDXrBoxfW8IJtk27jBlK5Im3vIf4 WPn2wlWt6BG3YkzhQ4bZHEUE4U8RvTGp7+kr2EMdp7NidKEBm/mMg6Yvp8iQp53/6Utf 3Vyxm+TuIFEX3vv+URLwAkVFN8V/w5OeyxJjLt7DgMYxxVJnS02VU3k6iD/o7w/ZboS/ GULg== X-Gm-Message-State: AOAM532erRGuLLUQQHDzmWnq5ldlBSaRWBnQ39LcGoodIpsWucDbVVoV Cil4pZH0gyp04P2nEEUx91L1PnOnY6rftWP50Sc= X-Google-Smtp-Source: ABdhPJwuIyJOLz2e50Yb4QdqqIwLF4pHQVzO5AcIThkrk7hdw9v+MTXkyCY4cka5nwu5504APsj8MpP7w418Dex33Y4= X-Received: by 2002:aca:f550:: with SMTP id t77mr9597289oih.8.1589792364142; Mon, 18 May 2020 01:59:24 -0700 (PDT) MIME-Version: 1.0 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> In-Reply-To: <20200515171031.GB19423@ninjato> From: "Lad, Prabhakar" Date: Mon, 18 May 2020 09:58:57 +0100 Message-ID: Subject: Re: [PATCH 03/17] ARM: dts: r8a7742: Add I2C and IIC support To: Wolfram Sang 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 Content-Type: text/plain; charset="UTF-8" Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Hi Wolfram, Thank for the review. On Fri, May 15, 2020 at 6:10 PM Wolfram Sang wrote: > > On Fri, May 15, 2020 at 04:08:43PM +0100, Lad Prabhakar wrote: > > Add the I2C[0-3] and IIC[0-3] devices nodes to the R8A7742 device tree. > > > > Automatic transmission for PMIC control is not available on IIC3 hence > > compatible string "renesas,rcar-gen2-iic" and "renesas,rmobile-iic" is > > not added to iic3 node. > > Makes sense. > > 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 runtime. > 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. Cheers, --Prabhakar