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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CD78C678D4 for ; Tue, 7 Mar 2023 19:17:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233928AbjCGTRk (ORCPT ); Tue, 7 Mar 2023 14:17:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233929AbjCGTRN (ORCPT ); Tue, 7 Mar 2023 14:17:13 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5852EF9F for ; Tue, 7 Mar 2023 11:01:05 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 652F66150D for ; Tue, 7 Mar 2023 19:01:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07673C433EF; Tue, 7 Mar 2023 19:01:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678215664; bh=2HyyGHbU19N8wN7gwvdxhKw6EH96AyXcByLAHVbiGB4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zd/Z+Pa7jlrDjKgMv5JcmK8LAg0DLyWELFSzwdiFsQ1wyAGeR5BiA3BZzH/L0AeSC XQHLmhjTVLHptcaFAQCvyPa5Zl5lpK/GydkijjqjxWiTfoyg3WAgymNRZwsUyvU/VW tzMVK7hPUM/3iSluU63acgoI9pTNNLe53Sd+KPy4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sherry Sun , Shenwei Wang , Sasha Levin Subject: [PATCH 5.15 327/567] serial: fsl_lpuart: fix RS485 RTS polariy inverse issue Date: Tue, 7 Mar 2023 18:01:03 +0100 Message-Id: <20230307165920.071655585@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307165905.838066027@linuxfoundation.org> References: <20230307165905.838066027@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Shenwei Wang [ Upstream commit 3957b9501a5a8fa709ae4a47483714491471f6db ] The previous 'commit 846651eca073 ("serial: fsl_lpuart: RS485 RTS polariy is inverse")' only fixed the inverse issue on lpuart 8bit platforms. This is a follow-up patch to fix the RS485 polarity inverse issue on lpuart 32bit platforms. Fixes: 03895cf41d18 ("tty: serial: fsl_lpuart: Add support for RS-485") Reported-by: Sherry Sun Signed-off-by: Shenwei Wang Link: https://lore.kernel.org/r/20230207162420.3647904-1-shenwei.wang@nxp.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/serial/fsl_lpuart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 08096d33af8a6..f4d9dc4648da4 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1406,9 +1406,9 @@ static int lpuart32_config_rs485(struct uart_port *port, * Note: UART is assumed to be active high. */ if (rs485->flags & SER_RS485_RTS_ON_SEND) - modem &= ~UARTMODEM_TXRTSPOL; - else if (rs485->flags & SER_RS485_RTS_AFTER_SEND) modem |= UARTMODEM_TXRTSPOL; + else if (rs485->flags & SER_RS485_RTS_AFTER_SEND) + modem &= ~UARTMODEM_TXRTSPOL; } /* Store the new configuration */ -- 2.39.2