From patchwork Wed May 17 14:17:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hugo Villeneuve X-Patchwork-Id: 95293 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp1189212vqo; Wed, 17 May 2023 07:43:35 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ7KAqJbmwLgswj4bNYFrkCVke67KA6bG8NZ78wWnCM0ZRMmSemQXljmX4DQlazmGi1zUeJl X-Received: by 2002:a17:902:c106:b0:1a9:a032:3844 with SMTP id 6-20020a170902c10600b001a9a0323844mr2563500pli.16.1684334615556; Wed, 17 May 2023 07:43:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1684334615; cv=none; d=google.com; s=arc-20160816; b=Rs82nTmzadTekwxr7BjBvYWlrX8P/DKgkuQKTOjOVes3JY6pff0HYFg1tMhaEJKytB qTrPiq1RAjPqXTt9QQ6JjL9fMUuyqIKWTPMpIfv8hm538vKlsxC6B3yVJ1qp3h9iaZED /KARhXXb6OO4TwQsuyy4wIOgGV7P5k+2SDTROqGc5Q4BvmwihsxCfB6Bds2lPDWKgOcB DpDznPe7BuW9hYLEIL9envLG6WxnfQvqEErttQ13nb+1pe2S2qKCng+JhFO5U9i9kqOY 2K9zaYrlfOZ46a0uzAmzEbKNVOIo5beTEbUVlFExGeQZmHMjdzBOh4LIxYjL/Li55u6C brLA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:subject:content-transfer-encoding:mime-version :message-id:date:cc:to:from:dkim-signature; bh=/cCcUVY0+p8UfDspSKk2zcUodO6pJN+rn+TO7JZm56Q=; b=a0+qSn/6Hnxv4+ZWuQFClF81sCNnvcRmwg5yjp5aMf3EJkGO4ysGZgtdkh8bpMwG3f ho3XTm3KGDVlXLhYX0Q1IzmSHv8t90+pKEDFKr/7kDzF2bo0uoB0FNrRDj3AgvzJPFSr ax5MafVgw/a6DIdFnd+D3AmRmS+JfGGupOrfqrriHsFLffH+pBlpK/5ScFOHN8wBiSoL qYic9izpIiFM0C+j8XcBWgnoGHwetvIz/7BfalIPa7WJppA9L7bwY0imyiU6T31PxRhb llHk1ulJwPJUyJ/mUwga81kSIL7L4kTPSFWsh7q5PLysjZohrbefsAVtX74M6M7N1iER C3PQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@hugovil.com header.s=x header.b=ur3oFjny; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id j10-20020a170902690a00b001a6783cf26dsi21015430plk.255.2023.05.17.07.43.22; Wed, 17 May 2023 07:43:35 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=fail header.i=@hugovil.com header.s=x header.b=ur3oFjny; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229712AbjEQOSO (ORCPT + 99 others); Wed, 17 May 2023 10:18:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229961AbjEQOSM (ORCPT ); Wed, 17 May 2023 10:18:12 -0400 Received: from mail.hugovil.com (mail.hugovil.com [162.243.120.170]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43744170F; Wed, 17 May 2023 07:18:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=hugovil.com ; s=x; h=Subject:Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Cc:To :From:Sender:Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post: List-Owner:List-Archive; bh=/cCcUVY0+p8UfDspSKk2zcUodO6pJN+rn+TO7JZm56Q=; b=u r3oFjnyB/xtHBSlIrjLjSoW31w0Wl2pRo5uKToNTYG4ydhjfqEtd/8L9EJPtSAzQFgqstxmwYFW9D gV70xDWFksLzeM8cLHm4dNqrqsMH8z49IHVKNexIOgtaA22eCJSEYN+2La6DCPfxRq65U9FO0JoOj /VZWSB2xuzZWTmmQ=; Received: from modemcable168.174-80-70.mc.videotron.ca ([70.80.174.168]:36332 helo=pettiford.lan) by mail.hugovil.com with esmtpa (Exim 4.92) (envelope-from ) id 1pzHyh-0006rK-56; Wed, 17 May 2023 10:18:07 -0400 From: Hugo Villeneuve To: Greg Kroah-Hartman , Jiri Slaby Cc: hugo@hugovil.com, Hugo Villeneuve , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 17 May 2023 10:17:46 -0400 Message-Id: <20230517141745.3801238-1-hugo@hugovil.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 70.80.174.168 X-SA-Exim-Mail-From: hugo@hugovil.com X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Spam-Level: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_PASS,SPF_PASS, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 Subject: [PATCH] serial: sc16is7xx: mark IOCONTROL register as volatile X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.hugovil.com) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1766152853515048921?= X-GMAIL-MSGID: =?utf-8?q?1766152853515048921?= From: Hugo Villeneuve Bit SRESET (3) is cleared when a reset operation is completed. Having the IOCONTROL register as non-volatile will always read SRESET as 1. Therefore mark IOCONTROL register as a volatile register. Signed-off-by: Hugo Villeneuve --- drivers/tty/serial/sc16is7xx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 00054bb49780..a7c4da3cfd2b 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -488,6 +488,7 @@ static bool sc16is7xx_regmap_volatile(struct device *dev, unsigned int reg) case SC16IS7XX_TXLVL_REG: case SC16IS7XX_RXLVL_REG: case SC16IS7XX_IOSTATE_REG: + case SC16IS7XX_IOCONTROL_REG: return true; default: break;