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=-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 D76D3C4332E for ; Wed, 6 Jan 2021 16:24:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B17E423132 for ; Wed, 6 Jan 2021 16:24:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727718AbhAFQYB (ORCPT ); Wed, 6 Jan 2021 11:24:01 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:51592 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727482AbhAFQYA (ORCPT ); Wed, 6 Jan 2021 11:24:00 -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 106GHiXP020605; Wed, 6 Jan 2021 17:23:07 +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=vp88p8KyitfwADSy57b/zoCsXgauvQnAD8bJDD3BjRw=; b=QSZHZGDhFogPoMRhUV7MALXD2qBx32r2prC/dnX7Flh2nG93t6Cc5bUyvtZEgL+0Kz4x XvGxjc242OaP8Gd6WHWuPNekA0AhYAr4ESctajBImbhfG++tLF96Hj02UvNOm9PtcObA XZ14GmfEbQKU5UGwYvuDT2KxkkYnKDrOIoRJEOz91wfY3sh7wN4Im4EzxzhrdDry9Mdb 9wqXJJ5jjKf9VvJQC/Bd9rknxyhlneESYGttUNFxkk4403eRwHGU4j8tJYUUMr45G1tH u9VrY7HXJX2UkB/sh+kyY+PsdeAnQ46BA2T0WLroYx6+lHVuNLVSqenSQuduFEM5h/bv RA== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 35tgkn09f8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 06 Jan 2021 17:23:07 +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 1FA17100034; Wed, 6 Jan 2021 17:23:07 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 14A2F2AD2C6; Wed, 6 Jan 2021 17:23:07 +0100 (CET) Received: from localhost (10.75.127.51) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 6 Jan 2021 17:23:06 +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 v2 5/8] dt-bindings: serial: stm32: update rts-gpios and cts-gpios Date: Wed, 6 Jan 2021 17:22:00 +0100 Message-ID: <20210106162203.28854-6-erwan.leray@foss.st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210106162203.28854-1-erwan.leray@foss.st.com> References: <20210106162203.28854-1-erwan.leray@foss.st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.75.127.51] X-ClientProxiedBy: SFHDAG4NODE1.st.com (10.75.127.10) 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=2021-01-06_09:2021-01-06,2021-01-06 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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. Acked-by: Rob Herring Signed-off-by: Erwan Le Ray 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 -- 2.17.1