From patchwork Wed Jan 15 11:54:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Codrin Ciubotariu X-Patchwork-Id: 1223344 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=microchip.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47yQk55mPFz9sS9 for ; Wed, 15 Jan 2020 22:55:09 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730266AbgAOLyw (ORCPT ); Wed, 15 Jan 2020 06:54:52 -0500 Received: from esa6.microchip.iphmx.com ([216.71.154.253]:22077 "EHLO esa6.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730202AbgAOLyq (ORCPT ); Wed, 15 Jan 2020 06:54:46 -0500 Received-SPF: Pass (esa6.microchip.iphmx.com: domain of Codrin.Ciubotariu@microchip.com designates 198.175.253.82 as permitted sender) identity=mailfrom; client-ip=198.175.253.82; receiver=esa6.microchip.iphmx.com; envelope-from="Codrin.Ciubotariu@microchip.com"; x-sender="Codrin.Ciubotariu@microchip.com"; x-conformance=spf_only; x-record-type="v=spf1"; x-record-text="v=spf1 mx a:ushub1.microchip.com a:smtpout.microchip.com -exists:%{i}.spf.microchip.iphmx.com include:servers.mcsv.net include:mktomail.com include:spf.protection.outlook.com ~all" Received-SPF: None (esa6.microchip.iphmx.com: no sender authenticity information available from domain of postmaster@email.microchip.com) identity=helo; client-ip=198.175.253.82; receiver=esa6.microchip.iphmx.com; envelope-from="Codrin.Ciubotariu@microchip.com"; x-sender="postmaster@email.microchip.com"; x-conformance=spf_only Authentication-Results: esa6.microchip.iphmx.com; dkim=none (message not signed) header.i=none; spf=Pass smtp.mailfrom=Codrin.Ciubotariu@microchip.com; spf=None smtp.helo=postmaster@email.microchip.com; dmarc=pass (p=none dis=none) d=microchip.com IronPort-SDR: 8ta0GVqnRosUh0dsqcKmr/VZ6X5NupaqcxIURil3G+SuFiLjv9sx1iSg2Kg7YD7SWIx0Y+UcgE 8UfqFN0tb0pDf5vxK6QMLdtJoEjckNEnAnfHh8ec+7ooGUoe/9M5MayZd+HSXm65vGYaQGJYbn jAZNQ7y606W5NRarrPapAJpubYCYxAgQNxOkWtNKfFFI8uClYmaaYxum3QwKL/i3NjDgAoYVqX mr98JTJ6kcqHCBNI1nYGDNrZANFA1GrZh8ZNFn4XOcMckjfbLZDfawSTcUpHI7W4VKJk3pRxIl yAw= X-IronPort-AV: E=Sophos;i="5.70,322,1574146800"; d="scan'208";a="60862983" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 15 Jan 2020 04:54:45 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Wed, 15 Jan 2020 04:54:43 -0700 Received: from rob-ult-m19940.microchip.com (10.10.85.251) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.1713.5 via Frontend Transport; Wed, 15 Jan 2020 04:54:40 -0700 From: Codrin Ciubotariu To: , , , CC: , , , , , , , , Codrin Ciubotariu Subject: [PATCH v3 1/6] dt-bindings: i2c: at91: document optional bus recovery properties Date: Wed, 15 Jan 2020 13:54:17 +0200 Message-ID: <20200115115422.17097-2-codrin.ciubotariu@microchip.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200115115422.17097-1-codrin.ciubotariu@microchip.com> References: <20200115115422.17097-1-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 From: Kamel Bouhara The at91 I2C controller can support bus recovery by re-assigning SCL and SDA to gpios. Add the optional pinctrl and gpio properties to do so. Signed-off-by: Kamel Bouhara [codrin.ciubotariu@microchip.com: rebased] Signed-off-by: Codrin Ciubotariu Reviewed-by: Rob Herring Acked-by: Ludovic Desroches --- Changes in v3: - rebased; - added Reviewed-by tag from Rob; Changes in v2: - none; Documentation/devicetree/bindings/i2c/i2c-at91.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt index d4bad86107b8..96c914e048f5 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt @@ -28,8 +28,13 @@ Optional properties: "atmel,sama5d4-i2c", "atmel,sama5d2-i2c", "microchip,sam9x60-i2c". +- scl-gpios: specify the gpio related to SCL pin +- sda-gpios: specify the gpio related to SDA pin +- pinctrl: add extra pinctrl to configure i2c pins to gpio function for i2c + bus recovery, call it "gpio" state - Child nodes conforming to i2c bus binding + Examples : i2c0: i2c@fff84000 { @@ -64,6 +69,11 @@ i2c0: i2c@f8034600 { clocks = <&flx0>; atmel,fifo-size = <16>; i2c-sda-hold-time-ns = <336>; + pinctrl-names = "default", "gpio"; + pinctrl-0 = <&pinctrl_i2c0>; + pinctrl-1 = <&pinctrl_i2c0_gpio>; + sda-gpios = <&pioA 30 GPIO_ACTIVE_HIGH>; + scl-gpios = <&pioA 31 GPIO_ACTIVE_HIGH>; wm8731: wm8731@1a { compatible = "wm8731";