From patchwork Fri Jun 2 15:26:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hugo Villeneuve X-Patchwork-Id: 102615 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp1116268vqr; Fri, 2 Jun 2023 08:36:37 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5y3xcX5YncrxxklU5cllUuCgC113Oq+svlRI2jlLWEQ8o2AXEc2bw8bvlWtRYGhO6hfiUJ X-Received: by 2002:a05:6a20:9382:b0:10b:cc13:5ac8 with SMTP id x2-20020a056a20938200b0010bcc135ac8mr10554237pzh.27.1685720196834; Fri, 02 Jun 2023 08:36:36 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1685720196; cv=none; d=google.com; s=arc-20160816; b=A/0UAlB05Y6nERRmzmoS1o+KPAUzCpp2gWU72iNTeLAkx1xv359rEDgdi5U9KAdq7J NLFDR9S8UmvcG2wzyJ8nP63IYEV6Azxdxj1sSJkC09Z1G2eTrr1jjD8duHqyn/O9nMDx v0W2DE0WOiK44uMBBEarbEfnNumkZ2/f5qrJsOKKr6GTDb15E+MkwxmN5RyQWREq+Y3/ UixZMoXrj9bnXSPMK/hB8Mj7t1eYyTo5sGmiPVYi/ym+C9JLessvZZewOIQmjSs/L2x1 ouEB2Yr/rb4r/TKC7e6bBGT/RIEPB4dQbt9B3n9ZzBbwgEZzPEdpXYhZtfNGGw158NHl X0DQ== 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 :references:in-reply-to:message-id:date:cc:to:from:dkim-signature; bh=T/ybH+luXFJtRUNLsANdxNj5MlosRcBXIwuB3tKL/mQ=; b=0azlW8fgIDZM5EaafyxeyVb6fa1RMVOKolBupitHwvo1whoqBzRcoSDX11U0rTh/LV kT+uQ+8A7V4gCMPWLLNunx052U89yiZ6LhZMOXZUfvrypn4tzAcoSc5c46GNBj3cs9LF MmoqWXMR1hWOWgduCoUjmCjrXQVF6G11Azdudkz/VZbrdgWgS7sPMjJ4VUA8Njw1P5B2 YAlDsn3APtqUmccXRGdjb9JDmQbGXaXUL/nqYsOpsK3/ew8UtExBV03I45PLSFHu+c0i kwzHPLnczqJnROWkA/AbYiPATzexYjtdaFWrvvBycCSWf++DOctiEa2617mlL6iO1Gky Go7w== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@hugovil.com header.s=x header.b=mfUCMr5p; 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 k62-20020a636f41000000b0053feb93b539si1171596pgc.330.2023.06.02.08.36.25; Fri, 02 Jun 2023 08:36:36 -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=mfUCMr5p; 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 S236609AbjFBP0t (ORCPT + 99 others); Fri, 2 Jun 2023 11:26:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234614AbjFBP0m (ORCPT ); Fri, 2 Jun 2023 11:26:42 -0400 Received: from mail.hugovil.com (mail.hugovil.com [162.243.120.170]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB091E48; Fri, 2 Jun 2023 08:26:38 -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:References: In-Reply-To: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:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=T/ybH+luXFJtRUNLsANdxNj5MlosRcBXIwuB3tKL/mQ=; b=mfUCMr5pnhOaMZd6Tjl11cca/Y +vzCLQNE7U1/zzQhoFUG4z43sad9XKUbj86/KTp5DTcdI54/0P76d8nptwHG2/uPiAFKjFOPTT3lz dmvtpr0Tgkura6XniRxx3zOrhLQkVi1cH7LJ+FM0Y3IsQYNmYbk9GEcoZYhTGddv3F+Y=; Received: from modemcable168.174-80-70.mc.videotron.ca ([70.80.174.168]:50948 helo=pettiford.lan) by mail.hugovil.com with esmtpa (Exim 4.92) (envelope-from ) id 1q56fg-0008Hq-Jh; Fri, 02 Jun 2023 11:26:33 -0400 From: Hugo Villeneuve To: gregkh@linuxfoundation.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jirislaby@kernel.org, jringle@gridpoint.com, tomasz.mon@camlingroup.com, l.perczak@camlintechnologies.com Cc: linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, hugo@hugovil.com, linux-gpio@vger.kernel.org, Hugo Villeneuve , stable@vger.kernel.org, Lech Perczak Date: Fri, 2 Jun 2023 11:26:18 -0400 Message-Id: <20230602152626.284324-3-hugo@hugovil.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230602152626.284324-1-hugo@hugovil.com> References: <20230602152626.284324-1-hugo@hugovil.com> 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 v7 2/9] 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?1767605741180364449?= X-GMAIL-MSGID: =?utf-8?q?1767605741180364449?= 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, which is incorrect. Also, if IOCONTROL register is not a volatile register, the upcoming patch "serial: sc16is7xx: fix regression with GPIO configuration" doesn't work when setting some shared GPIO lines as modem control lines. Therefore mark IOCONTROL register as a volatile register. Cc: # 6.1.x Signed-off-by: Hugo Villeneuve Reviewed-by: Lech Perczak Tested-by: Lech Perczak --- 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 faa51a58671f..0c903d44429c 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;