From patchwork Sat Feb 29 16:05:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Devera X-Patchwork-Id: 11413921 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 4C9BE14E3 for ; Sat, 29 Feb 2020 16:06:06 +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 2AD1B2468E for ; Sat, 29 Feb 2020 16:06:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="nmvnwt1Z"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=eaxlabs.cz header.i=@eaxlabs.cz header.b="NkxIiuTk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2AD1B2468E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=eaxlabs.cz 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=GN06UOikcYLr5w/fdKeeFaS/U395RnxGyDeo7+klDSs=; b=nmv nwt1Zhf3nnFROxrwB2RNfk9O1nL1AR4hSg8OA/uHQDL2pAqAQuv98v+upBcAEGxldDVAnA5J4Kf1c TPiJVr4OqnVKQ0Bict4x/mzGDUBz/nCD3M7DS1gzkyzUi4qvhofokPMjOeDraip6FcK/cKIa0SV+K LAVzsxS3aYd3SlbrQbcf31+lXVcTBRzLwEpjLV9iumn6xg3UtlukSsp6aAYRx49Uyz4HQT9tUYlcW I5HRA1qZI0WxV2fiGPeJrYIZgnH4MRhKQFOtXhUcpeOQo5xeSZUH3eyChbPAINPOcxY9QF11Teqft GyPG33W44tdisIPDHs9HKWb+k7EM09g==; 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 1j84cv-0006wh-8L; Sat, 29 Feb 2020 16:06:05 +0000 Received: from ms9.eaxlabs.cz ([147.135.177.209]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j84ci-0006cV-6S for linux-arm-kernel@lists.infradead.org; Sat, 29 Feb 2020 16:05:54 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=eaxlabs.cz; s=mail; h=Message-Id:Date:Subject:Cc:To:From; bh=Ckgfb+tZ4UayimR7ATmjnhS6EOieCUCK3o2mRGl5D0k=; b=NkxIiuTkB7rHeUHTFzQ7/Guyj4/QwnLwBusq91zKwUl1NgwFnwEKxYW/yZ7r7f17urT6PP6bkyrUgqGcFcEssp0wR0gN49vFfEDPV+SP1orpR+bsrCORGoOchWPOT/CQ/8LM59e90KbPeBXjhNzNJoLzRgZ0HZ36scpn5WpNERw=; Received: from [82.99.129.6] (helo=localhost.localdomain) by ms9.eaxlabs.cz with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1j84cV-000150-TL; Sat, 29 Feb 2020 17:05:42 +0100 From: Martin Devera To: Greg Kroah-Hartman , Jiri Slaby , Maxime Coquelin , Alexandre Torgue , linux-serial@vger.kernel.org (open list:SERIAL DRIVERS), linux-arm-kernel@lists.infradead.org (moderated list:ARM/STM32 ARCHITECTURE), linux-kernel@vger.kernel.org (open list) Subject: [PATCH 1/2] tty/serial: Add st,swap OF option to stm32-usart Date: Sat, 29 Feb 2020 17:05:06 +0100 Message-Id: <20200229160507.31309-1-devik@eaxlabs.cz> X-Mailer: git-send-email 2.11.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200229_080552_546936_7A2EDF5E X-CRM114-Status: GOOD ( 11.73 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 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 -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid 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: Martin Devera MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org STM32 F7/H7 usarts supports RX & TX pin swapping. Add option to turn it on. Tested on STM32MP157. Signed-off-by: Martin Devera --- drivers/tty/serial/stm32-usart.c | 3 ++- drivers/tty/serial/stm32-usart.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index fdcc2142aa79..8d25869a02eb 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -780,7 +780,7 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios, cr1 = USART_CR1_TE | USART_CR1_RE; if (stm32_port->fifoen) cr1 |= USART_CR1_FIFOEN; - cr2 = 0; + cr2 = stm32_port->swap ? USART_CR2_SWAP : 0; /* Tx and RX FIFO configuration */ cr3 = readl_relaxed(port->membase + ofs->cr3); @@ -1097,6 +1097,7 @@ static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev) stm32_ports[id].hw_flow_control = of_property_read_bool(np, "st,hw-flow-ctrl"); + stm32_ports[id].swap = of_property_read_bool(np, "st,swap"); stm32_ports[id].port.line = id; stm32_ports[id].cr1_irq = USART_CR1_RXNEIE; stm32_ports[id].cr3_irq = 0; diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h index 2a68bc48652e..2503a91b890c 100644 --- a/drivers/tty/serial/stm32-usart.h +++ b/drivers/tty/serial/stm32-usart.h @@ -275,6 +275,7 @@ struct stm32_port { enum dma_cb rx_dma_cb; /* dma rx callback status */ bool tx_dma_busy; /* dma tx busy */ bool hw_flow_control; + bool swap; /* swap RX & TX pins */ bool fifoen; int wakeirq; struct pinctrl_state *console_pins;