From patchwork Fri Dec 18 19:00:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Erwan LE RAY X-Patchwork-Id: 346153 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 D3D74C2D0E4 for ; Fri, 18 Dec 2020 19:01:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 93A8823B8A for ; Fri, 18 Dec 2020 19:01:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732943AbgLRTBa (ORCPT ); Fri, 18 Dec 2020 14:01:30 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:41124 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726011AbgLRTB3 (ORCPT ); Fri, 18 Dec 2020 14:01:29 -0500 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0BIIx6no005387; Fri, 18 Dec 2020 20:00:31 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=selector1; bh=Ka8iceOB3Xs/cEsTiVyBu9ihsXtHU5bQ3J2Fth7vxDs=; b=8HLJXbMULBYk+f+yA3V68ljwcZKjhMMTxXOeRVu4L7SUchlxxI2HdrYC9WusE8QfVjR0 anSTOImIIdUu6H/3bhNuS2oo1os85JbH/SuNSQwjSRDXi3a03rG+JLtrzJJDIOD/v5Kd aS9ctsbvPlItRmSO9TR6qmij0kaLvnw/BPcehKdRsLO7X7qfH3t6/nj51PXJZdBoW3oG 1d5yOtwGaZi+H7Q/2t5zJA3sTdkt0X+cmIyXBvjkASLXAqQH0wIlkkYD/MkcDEEUDtVs Mi1BZ8l6pZx6gA9tx6C9gE31r420g5Fk+jSN7hzR+HF9dYx8vXTXhjj/xq7qQ7+9beke Ag== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 35cpwern1t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 18 Dec 2020 20:00:31 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id F2E0510002A; Fri, 18 Dec 2020 20:00:30 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id E4C04228601; Fri, 18 Dec 2020 20:00:30 +0100 (CET) Received: from localhost (10.75.127.49) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 18 Dec 2020 20:00:30 +0100 From: Erwan Le Ray To: Greg Kroah-Hartman , Jiri Slaby , Rob Herring , Maxime Coquelin , Alexandre Torgue CC: , , , , , Erwan Le Ray , Fabrice Gasnier , Valentin Caron Subject: [PATCH 5/8] dt-bindings: serial: stm32: update rts-gpios and cts-gpios Date: Fri, 18 Dec 2020 20:00:16 +0100 Message-ID: <20201218190020.1572-6-erwan.leray@foss.st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201218190020.1572-1-erwan.leray@foss.st.com> References: <20201218190020.1572-1-erwan.leray@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG3NODE2.st.com (10.75.127.8) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-18_12:2020-12-18,2020-12-18 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org Update rts-gpios and cts-gpios: - remove max-items as already defined in serial.yaml - add a note describing rts-gpios and cts-gpios usage with stm32 Document the use of cts-gpios and rts-gpios for flow control in STM32 UART controller. These properties can be used instead of 'uart-has-rtscts' or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow control instead of dedicated pins. It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design. Signed-off-by: Erwan Le Ray Acked-by: Rob Herring diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml index 06d5f251ec88..8631678283f9 100644 --- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml +++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml @@ -50,11 +50,14 @@ properties: minItems: 1 maxItems: 2 - cts-gpios: - maxItems: 1 - - rts-gpios: - maxItems: 1 +# cts-gpios and rts-gpios properties can be used instead of 'uart-has-rtscts' +# or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow +# control instead of dedicated pins. +# +# It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or +# 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design. + cts-gpios: true + rts-gpios: true wakeup-source: true