From patchwork Tue Aug 4 09:59:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Codrin Ciubotariu X-Patchwork-Id: 1340764 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=quarantine dis=none) header.from=microchip.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=microchip.com header.i=@microchip.com header.a=rsa-sha256 header.s=mchp header.b=aoiA1nie; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BLVcT09CDz9sSt for ; Tue, 4 Aug 2020 20:00:25 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729375AbgHDKAV (ORCPT ); Tue, 4 Aug 2020 06:00:21 -0400 Received: from esa3.microchip.iphmx.com ([68.232.153.233]:33043 "EHLO esa3.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726844AbgHDKAU (ORCPT ); Tue, 4 Aug 2020 06:00:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1596535220; x=1628071220; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9iPc+xgooR96zu6gZSvzswYQ4P1VQbTGDAAFAk2BvHg=; b=aoiA1niebva4yztk7RI0oQMzjB6ZFA7QivcPdNLphbtvLhWOxJw5kXbI gypa4+tmgK2c2YL827dB56SHil2Cr2AkJ7RcWWdOUvHeA85Gpq9pUtzf9 9RqRO+b7c9xew1W7gzRU7KKkHG3lQ1DTAd0bTqsPN4x82wwI+doHMsTZM ipq+2HUGDuu+Jihhe0GMBX8Ip854cMC6u0Yz+k2Z+nfDLFor7pTshXPii 3H+cyqdbvWYxxON/0erZfyiJ1mdu6ABpi5We4rmBOOZRyQWJg/B9x7Koy lNVy/0Wqsj5GEnNQ6fPGmyNVxSXN/teZbdySmYtqlnISCncsMTKlsvmp8 g==; IronPort-SDR: Tn2DDWu0R9LqOqTqxSOTUEklWa8eCPMV8mwo0EszfQ+p8hwxQDS7gntspOFg1uPIp+xScgDMyc jtgSewwVObKQcfuUVUjakGwcp++ZWmP7rrg6WivPklx5c4XVjksXTPj0VVv4gWC3vLJHTEOY3X S7cLV9QHLuw93jsvHNbv1U/nA3Nqg1g4Xq+s+Z0RiX1k1hK0k7gHHG1+OXD9sRXK7pvUASnM42 xONQPAS7mIztE2hmr+rCqkENMcinVwI5bWIhhCMQpCWcmK5vUHh3bc084sZArY5wleO3+nwJaN XqY= X-IronPort-AV: E=Sophos;i="5.75,433,1589266800"; d="scan'208";a="86620321" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 04 Aug 2020 03:00:19 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.87.72) by chn-vm-ex02.mchp-main.com (10.10.87.72) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Tue, 4 Aug 2020 03:00:17 -0700 Received: from rob-ult-m19940.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Tue, 4 Aug 2020 02:59:46 -0700 From: Codrin Ciubotariu To: , , , CC: , , , , , , , Codrin Ciubotariu Subject: [PATCH 1/4] dt-binding: i2c: add generic properties for GPIO bus recovery Date: Tue, 4 Aug 2020 12:59:23 +0300 Message-ID: <20200804095926.205643-2-codrin.ciubotariu@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200804095926.205643-1-codrin.ciubotariu@microchip.com> References: <20200804095926.205643-1-codrin.ciubotariu@microchip.com> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The I2C GPIO bus recovery properties consist of two GPIOS and one extra pinctrl state ("gpio" or "recovery"). "recovery" pinctrl state is considered deprecated and "gpio" should be used instead. Not all are mandatory for recovery. Signed-off-by: Codrin Ciubotariu --- Changes from RFC: - "recovery" pinctrl state marked as deprecated; updated description to reflect this; Documentation/devicetree/bindings/i2c/i2c.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt index 438ae123107e..150a67da633d 100644 --- a/Documentation/devicetree/bindings/i2c/i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c.txt @@ -77,6 +77,16 @@ wants to support one of the below features, it should adapt these bindings. this information to detect a stalled bus more reliably, for example. Can not be combined with 'multi-master'. +- scl-gpios + specify the gpio related to SCL pin. Used for GPIO bus recovery. + +- sda-gpios + specify the gpio related to SDA pin. Optional for GPIO bus recovery. + +- pinctrl + add extra pinctrl to configure SCL/SDA pins to GPIO function for bus + recovery, call it "gpio" or "recovery"(deprecated) state + Required properties (per child device) --------------------------------------