From patchwork Thu Aug 28 09:55:01 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "bhupesh.sharma@freescale.com" X-Patchwork-Id: 4803391 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id EAEA99F38D for ; Thu, 28 Aug 2014 09:58:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1EAE72013A for ; Thu, 28 Aug 2014 09:58:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 44D5920142 for ; Thu, 28 Aug 2014 09:58:17 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XMwRP-0007In-5A; Thu, 28 Aug 2014 09:56:27 +0000 Received: from mail-bl2lp0207.outbound.protection.outlook.com ([207.46.163.207] helo=na01-bl2-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XMwRI-00079J-Jn for linux-arm-kernel@lists.infradead.org; Thu, 28 Aug 2014 09:56:21 +0000 Received: from BN3PR0301CA0049.namprd03.prod.outlook.com (25.160.152.145) by DM2PR03MB320.namprd03.prod.outlook.com (10.141.54.23) with Microsoft SMTP Server (TLS) id 15.0.1019.11; Thu, 28 Aug 2014 09:55:57 +0000 Received: from BN1BFFO11FD032.protection.gbl (2a01:111:f400:7c10::1:150) by BN3PR0301CA0049.outlook.office365.com (2a01:111:e400:401e::17) with Microsoft SMTP Server (TLS) id 15.0.1015.19 via Frontend Transport; Thu, 28 Aug 2014 09:55:55 +0000 Received: from az84smr01.freescale.net (192.88.158.2) by BN1BFFO11FD032.mail.protection.outlook.com (10.58.144.95) with Microsoft SMTP Server (TLS) id 15.0.1010.11 via Frontend Transport; Thu, 28 Aug 2014 09:55:55 +0000 Received: from b45370.ap.freescale.net (B45370-01.ap.freescale.net [10.232.40.49]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id s7S9tCQP001022; Thu, 28 Aug 2014 02:55:50 -0700 From: Bhupesh Sharma To: Subject: [PATCH V2 1/6] Documentation: DT: Add bindings for FSL NS16550A UART Date: Thu, 28 Aug 2014 15:25:01 +0530 Message-ID: <1409219706-14843-2-git-send-email-bhupesh.sharma@freescale.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1409219706-14843-1-git-send-email-bhupesh.sharma@freescale.com> References: <1409219706-14843-1-git-send-email-bhupesh.sharma@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.158.2; CTRY:US; IPV:CAL; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(979002)(6009001)(199003)(189002)(87286001)(46102001)(105606002)(77156001)(86362001)(6806004)(107046002)(81156004)(36756003)(77982001)(80022001)(47776003)(26826002)(20776003)(79102001)(95666004)(50466002)(83322001)(2351001)(50226001)(87936001)(106466001)(69596002)(84676001)(64706001)(68736004)(44976005)(74502001)(83072002)(74662001)(85306004)(102836001)(50986999)(104166001)(92726001)(89996001)(48376002)(88136002)(104016003)(21056001)(81542001)(85852003)(229853001)(81342001)(99396002)(62966002)(76176999)(31966008)(19580395003)(92566001)(4396001)(19580405001)(97736001)(93916002)(76482001)(33646002)(90102001)(110136001)(969003)(989001)(999001)(1009001)(1019001); DIR:OUT; SFP:; SCL:1; SRVR:DM2PR03MB320; H:az84smr01.freescale.net; FPR:; MLV:ovrnspm; PTR:InfoDomainNonexistent; A:1; MX:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;UriScan:; X-Forefront-PRVS: 031763BCAF Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.158.2 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.158.2; helo=az84smr01.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.158.2) smtp.mailfrom=bhupesh.sharma@freescale.com; X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140828_025620_845726_06DFDBBC X-CRM114-Status: UNSURE ( 8.40 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: mark.rutland@arm.com, rob.herring@linaro.org, arnd@arndb.de, marc.zyngier@arm.com, Will.Deacon@arm.com, stuart.yoder@freescale.com, grant.likely@secretlab.ca, Bhupesh Sharma , arnab.basu@freescale.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch addss the device-tree documentation for Freescale's NS16550 UART (also called DUART). There is a specific errata fix required in FSL NS16550 UART which ensures that an random interrupt storm is not observed when a break is provided as an input to the UART. Signed-off-by: Bhupesh Sharma --- .../devicetree/bindings/serial/of-serial.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/of-serial.txt b/Documentation/devicetree/bindings/serial/of-serial.txt index 7705477..1bdc569 100644 --- a/Documentation/devicetree/bindings/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/serial/of-serial.txt @@ -14,6 +14,7 @@ Required properties: - "altr,16550-FIFO32" - "altr,16550-FIFO64" - "altr,16550-FIFO128" + - "fsl,ns16550" - "serial" if the port type is unknown. - reg : offset and length of the register set for the device. - interrupts : should contain uart interrupt. @@ -39,6 +40,17 @@ Optional properties: property. - has-hw-flow-control: the hardware has flow control capability. +Note: +* fsl,ns16550: + ------------ + Freescale DUART is very similar to the PC16552D (and to a + pair of NS16550A), albeit with some nonstandard behavior such as + erratum A-004737 (relating to incorrect BRK handling). + + Represents a single port that is compatible with the DUART found + on many Freescale chips (examples include mpc8349, mpc8548, + mpc8641d, p4080 and ls2085a). + Example: uart@80230000 {