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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 B6948CA9EAF for ; Thu, 24 Oct 2019 20:13:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9554321929 for ; Thu, 24 Oct 2019 20:13:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726566AbfJXUNc (ORCPT ); Thu, 24 Oct 2019 16:13:32 -0400 Received: from relay12.mail.gandi.net ([217.70.178.232]:49927 "EHLO relay12.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726505AbfJXUNb (ORCPT ); Thu, 24 Oct 2019 16:13:31 -0400 Received: from localhost (unknown [78.193.40.249]) (Authenticated sender: kamel.bouhara@bootlin.com) by relay12.mail.gandi.net (Postfix) with ESMTPSA id 49E32200005; Thu, 24 Oct 2019 20:13:29 +0000 (UTC) From: Kamel Bouhara To: Wolfram Sang , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Nicolas Ferre , Alexandre Belloni , Ludovic Desroches , linux-arm-kernel@lists.infradead.org, Thomas Petazzoni , Rob Herring , devicetree@vger.kernel.org, Kamel Bouhara Subject: [PATCH v2 2/5] dt-bindings: i2c: at91: document optional bus recovery properties Date: Thu, 24 Oct 2019 22:12:59 +0200 Message-Id: <20191024201302.23376-3-kamel.bouhara@bootlin.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191024201302.23376-1-kamel.bouhara@bootlin.com> References: <20191024201302.23376-1-kamel.bouhara@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org 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 --- 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 b7cec17c3daf..8ea2ce5d8610 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt @@ -19,8 +19,13 @@ Optional properties: capable I2C controllers. - i2c-sda-hold-time-ns: TWD hold time, only available for "atmel,sama5d4-i2c" and "atmel,sama5d2-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 { @@ -55,6 +60,11 @@ 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"; -- 2.23.0