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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3AF58C433FE for ; Tue, 3 May 2022 21:11:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242672AbiECVPS (ORCPT ); Tue, 3 May 2022 17:15:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242714AbiECVPQ (ORCPT ); Tue, 3 May 2022 17:15:16 -0400 Received: from mail-oa1-f48.google.com (mail-oa1-f48.google.com [209.85.160.48]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B3F3840A1A; Tue, 3 May 2022 14:11:36 -0700 (PDT) Received: by mail-oa1-f48.google.com with SMTP id 586e51a60fabf-d6e29fb3d7so18425339fac.7; Tue, 03 May 2022 14:11:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=eh5OGgJnAtIHXJdL+WfBTLIsraxjNAm1ti5EfhZuw40=; b=q07uQBBKZNLbIawLBhceyZAjduHt8soVMgaPxS8bzyd/QQXXkLiQK/WSCbXohl8snN moEzZmcJWXqE/ULuz3hNw6CJq4OXz56dtaU5ELrI5y/NA4vuoaMQCU6TGFVl8cV3gsrq BT1kjUKoul1cjrnb6aHAtnHsY+9g6VqdDtnbNuOMtvco8zycA24GAozGBC3SMoaimc4z ECrhVCdM26pFOjHQVt1Au5vngxpXkisRnhk8Amq8jG3FYt8Jx3I/UCWE4uZ4pnlTAlFU WFpUxTImzAffXhIyc8AJfqgO7bK3a0xe1vQ7LjPFv0DTnVkDADATYH+lxmzstXGXfS8x xA6g== X-Gm-Message-State: AOAM530EesFiXMOVkfaM+TC8xqNKh59460KXHwdVuzQ/4UpoeV+n3wA1 lFeFL0PWsdQUrfug5IBBHA== X-Google-Smtp-Source: ABdhPJxDpfn/Ees5StxaeeMPeh0vYo/Z6K2dj90q21D8dLT7ggEODCoMfKr8DnNQeDmJz6P7UYBccg== X-Received: by 2002:a05:6870:a108:b0:ec:43ef:5338 with SMTP id m8-20020a056870a10800b000ec43ef5338mr2563907oae.16.1651612295751; Tue, 03 May 2022 14:11:35 -0700 (PDT) Received: from robh.at.kernel.org (66-90-144-107.dyn.grandenetworks.net. [66.90.144.107]) by smtp.gmail.com with ESMTPSA id 8-20020a056870124800b000e686d13888sm7671639oao.34.2022.05.03.14.11.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 May 2022 14:11:35 -0700 (PDT) Received: (nullmailer pid 38846 invoked by uid 1000); Tue, 03 May 2022 21:11:34 -0000 Date: Tue, 3 May 2022 16:11:34 -0500 From: Rob Herring To: Heiner Kallweit Cc: Wolfram Sang , Wolfram Sang , "devicetree@vger.kernel.org" , Rob Herring , Krzysztof Kozlowski , "linux-i2c@vger.kernel.org" Subject: Re: [PATCH v2 1/3] dt-bindings: i2c-gpio: Add property i2c-gpio,sda-output-only Message-ID: References: <3e6c934e-5298-42c5-c346-31b1acaa06ba@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Wed, 27 Apr 2022 21:23:28 +0200, Heiner Kallweit wrote: > There are slave devices that understand I2C but have read-only > SDA and SCL. Examples are FD650 7-segment LED controller and > its derivatives. Typical board designs don't even have a > pull-up for both pins. Therefore don't enforce open-drain > if SDA and SCL both are unidirectional. This patch makes > i2c-gpio usable with such devices, based on new DT property > i2c-gpio,sda-output-only. > > Signed-off-by: Heiner Kallweit > --- > v2: > - improve commit message > --- > Documentation/devicetree/bindings/i2c/i2c-gpio.yaml | 4 ++++ > 1 file changed, 4 insertions(+) > Reviewed-by: Rob Herring