From patchwork Mon Dec 6 17:14:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrik John X-Patchwork-Id: 521272 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 EF905C433EF for ; Mon, 6 Dec 2021 17:24:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237724AbhLFR1t (ORCPT ); Mon, 6 Dec 2021 12:27:49 -0500 Received: from buffalo.u-blox.com ([195.34.89.137]:53008 "EHLO buffalo.u-blox.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234199AbhLFR1s (ORCPT ); Mon, 6 Dec 2021 12:27:48 -0500 X-Greylist: delayed 513 seconds by postgrey-1.27 at vger.kernel.org; Mon, 06 Dec 2021 12:27:48 EST Received: from mail_filter (localhost [127.0.0.1]) by buffalo.u-blox.com (PF_LO_10026) with ESMTP id DB6373A1FA for ; Mon, 6 Dec 2021 18:15:44 +0100 (CET) Received: from ASSP.nospam (localhost [127.0.0.1]) by buffalo.u-blox.com (Postfix) with ESMTP id B343639E44; Mon, 6 Dec 2021 18:15:44 +0100 (CET) Received: from unknown ([127.0.0.1] helo=anyhost.local) by ASSP.nospam with SMTP (2.4.7); 6 Dec 2021 18:15:44 +0100 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=gEgOpf9xbMB/J9BzX5gzwSlI/0mue6wGe6f6ddIosXZ/f/lA+LKUX4mUHKwNuGHbl9e5dc+h4pkoAu0Mu4tUtc82KCICQCHKrfYvJ6jMnaRlXG1qVL5zA7Hj4/XGFUtSuSu2JviB2OfV3/RIZKazyOizd+Ar0ea8HUFvAlnx5AmuO1naJAzo0ljxaUCeL0fsHeGVf+2YbUG2lvJP6zhK8vMrBKmHbc1e81VonFL4mY3EiHY18zjc130Qe7wnZ4xIrh3cmLV9TSJSQjKI2zerAxvlFETGRkR40qptgTladCPvx0z3d0/cJ7TyUgosPxLnxWL0pzGWkN9AkHqv6JdZ9Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=aygLCurVC6gEQqLifn3GKr6z1eUEATg2vYrN5a6b1Dc=; b=Ey48ClcU0iwgW1xOi5OhtXyiJOs5rwZmpjI8MrlXQhDN2HUD2UFPSfNXuIS7k0NR3YVZYZcnr8keXMw76VAdO0xR5ZAzlI2kuz6uY4jlPciTZDR/B+/+fMk0yG4bCKb7AOxgOCN/LzCz+2w6iMkYNarDDmYe+LPFFZKFcJnqnUqxipG2HHg3/IdpOMFfYB+UfRphZf2I2wQvrMra/edHAnP2aZejmVjbxTZWUdWY97jK7OMQqmVV1xK2WI31OPn3XAT5YREW16siYoTcMD0Yo5LyFBm9JtfK2T8+OC9mXNJJ6vMRyj74jZ0EBkyPpy6yviHC6e68bfkzmQ7VXJeCNw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=u-blox.com; dmarc=pass action=none header.from=u-blox.com; dkim=pass header.d=u-blox.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=u-blox.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=aygLCurVC6gEQqLifn3GKr6z1eUEATg2vYrN5a6b1Dc=; b=ftWy17QlJFtWzLVkKahjguPsIKE5YjYXPRo4pEvO17P4o/PCdg3tZEDTxNaUiFg8Es/4i1ToOdjQGLyfklDGKgKUNgTZzon2xov7ufZJnm1rl4nXshEEb5UOIEBFKoAtaWLDm55vB8lNVi9pYTf5bBq3sMfGlV9qSXo/1Eq59cU= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=u-blox.com; From: Patrik John To: CC: Patrik John , Greg Kroah-Hartman Subject: [PATCH] serial: tegra: Change lower tolerance baud rate limit for tegra20 and tegra30 Date: Mon, 6 Dec 2021 18:14:57 +0100 Message-Id: X-Mailer: git-send-email 2.25.1 X-ClientProxiedBy: AS8P189CA0010.EURP189.PROD.OUTLOOK.COM (2603:10a6:20b:31f::9) To CWXP265MB2072.GBRP265.PROD.OUTLOOK.COM (2603:10a6:400:7c::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: abafb560-3324-4263-3b9b-08d9b8dc05bc X-MS-TrafficTypeDiagnostic: CWLP265MB2113:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:262; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:CWXP265MB2072.GBRP265.PROD.OUTLOOK.COM; PTR:; CAT:NONE; SFS:(4636009)(366004)(66556008)(66946007)(6486002)(966005)(508600001)(26005)(6506007)(66476007)(6916009)(1076003)(38350700002)(36756003)(6512007)(38100700002)(186003)(2616005)(956004)(44832011)(86362001)(83380400001)(5660300002)(6666004)(4326008)(2906002)(316002)(54906003)(8676002)(52116002)(8936002)(16453003); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-MS-Exchange-CrossTenant-Network-Message-Id: abafb560-3324-4263-3b9b-08d9b8dc05bc X-MS-Exchange-CrossTenant-AuthSource: CWXP265MB2072.GBRP265.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Dec 2021 17:15:37.9049 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 80c4ffa6-7511-4bba-9f03-e5872a660c9b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 2oWItdji/V8JJxot7CgICxyQUv4Mt2OM2X1Q7ocakSMwEX5F44XiuepvevkhK2CCxH/+f+xe/hlYry2r1UFMlw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CWLP265MB2113 X-OriginatorOrg: u-blox.com X-Assp-Version: 2.4.7(16004) on ASSP.nospam X-Assp-ID: ASSP.nospam 10944-06953 X-Assp-Session: 84838FC0 (mail 1) X-Assp-Original-Subject: [PATCH] serial: tegra: Change lower tolerance baud rate limit for tegra20 and tegra30 X-Assp-Client-TLS: yes X-Virus-Scanned: clamav-milter 0.99.4 at buffalo X-Virus-Status: Clean Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org commit b40de7469ef135161c80af0e8c462298cc5dac00 upstream. The current implementation uses 0 as lower limit for the baud rate tolerance for tegra20 and tegra30 chips which causes isses on UART initialization as soon as baud rate clock is lower than required even when within the standard UART tolerance of +/- 4%. This fix aligns the implementation with the initial commit description of +/- 4% tolerance for tegra chips other than tegra186 and tegra194. Fixes: d781ec21bae6 ("serial: tegra: report clk rate errors") Cc: stable Signed-off-by: Patrik John Link: https://lore.kernel.org/r/sig.19614244f8.20211123132737.88341-1-patrik.john@u-blox.com Signed-off-by: Greg Kroah-Hartman --- Backport for 5.4-stable drivers/tty/serial/serial-tegra.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index 64f18bf1e694..74c21152367a 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -1494,7 +1494,7 @@ static struct tegra_uart_chip_data tegra20_uart_chip_data = { .fifo_mode_enable_status = false, .uart_max_port = 5, .max_dma_burst_bytes = 4, - .error_tolerance_low_range = 0, + .error_tolerance_low_range = -4, .error_tolerance_high_range = 4, }; @@ -1505,7 +1505,7 @@ static struct tegra_uart_chip_data tegra30_uart_chip_data = { .fifo_mode_enable_status = false, .uart_max_port = 5, .max_dma_burst_bytes = 4, - .error_tolerance_low_range = 0, + .error_tolerance_low_range = -4, .error_tolerance_high_range = 4, };