From patchwork Sun Apr 12 18:09:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 11484643 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CC2D5174A for ; Sun, 12 Apr 2020 18:10:07 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9F64A206E9 for ; Sun, 12 Apr 2020 18:10:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="bo75YPqB"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="w+3hJt5/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9F64A206E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=4TJFBek2GLaBrZJ7GtbqvtXLFph/O4aVJ3seNSKS+/o=; b=bo7 5YPqBOLDElPGv1ikL38S0EEhlqzHWLadPrBEPoNMDWXmjsqGNmXEUZLwx1sH5THazPjNqRnoeMmIF qVTP5xXvV0BhF0nZLw7Jpd8NXnHoXLPVB2TwU6Ea6QJilKcHFbeD30LJrJVVz1SK7kPRS7WECT82E sx4UjvpMNbzFIuTh3dml9RcUS4MBuARH10rRM9vMOghxKdcOgwagApjVxlG5Eo5xnMImFiDDTPKLn sCQ+psCFwSLH28EZtjJYxDLop4JZ/XvJT79KUYk78fGboxA00E3sJqK5eEKvgrnVn+bUxSOydDh0D GktK9x8FamEd9eySWV9Gd8tk2u92S5Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jNh3N-0007PQ-I7; Sun, 12 Apr 2020 18:09:57 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jNh3K-0007Ox-SL for linux-arm-kernel@lists.infradead.org; Sun, 12 Apr 2020 18:09:56 +0000 Received: from localhost.localdomain (unknown [157.50.0.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7CFA6206DA; Sun, 12 Apr 2020 18:09:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586714993; bh=KvvVL4O/277aJbdbXBvwqPERBOm9+Bv6KLT8QTuv4zM=; h=From:To:Cc:Subject:Date:From; b=w+3hJt5/xqWcvDyO97BZEb7+ZEa7zW4Mbf5oiloYlbd4WzthZF/hm1ykeDka3C5w+ rHcMPFBC82G3Vrd48IF1ABsAKL8i7DaTXzEs2IIKlrQQ+NiD57WKPlUimhh3DR69ZJ /QWLrfeWOkTcCxbPXNtaGpeMhV+jg5jDKpp3Dpu8= From: mani@kernel.org To: gregkh@linuxfoundation.org, robh+dt@kernel.org, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com Subject: [PATCH 0/2] Add software flow control support for STM32 UART Date: Sun, 12 Apr 2020 23:39:21 +0530 Message-Id: <20200412180923.30774-1-mani@kernel.org> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200412_110954_936832_1223E49E X-CRM114-Status: UNSURE ( 8.89 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Manivannan Sadhasivam , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Manivannan Sadhasivam Hello, This patchset adds software flow control support for STM32 UART controller. This is necessary for the upcoming STM32MP1 based board called Stinger96 IoT-Box. On that board, a bluetooth chip is connected to one of the UART controller but the CTS/RTS lines got swapped mistakenly. So in order to workaround that hardware bug and also to support the usecase of using only Tx/Rx pins, this patchset adds software flow control support. This patchset has been validated w/ Stinger96 IoT-Box connected to Murata WiFi-BT combo chip. Thanks, Mani Manivannan Sadhasivam (2): dt-bindings: serial: Add binding for software flow control in STM32 UART tty: serial: Add software flow control support for STM32 USART .../bindings/serial/st,stm32-uart.yaml | 15 +- drivers/tty/serial/stm32-usart.c | 143 +++++++++++++++++- drivers/tty/serial/stm32-usart.h | 4 + 3 files changed, 155 insertions(+), 7 deletions(-)