From patchwork Wed Nov 26 11:47:22 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: 5384871 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5BBBEC11AC for ; Wed, 26 Nov 2014 11:51:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7B30720160 for ; Wed, 26 Nov 2014 11:51:03 +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 A19DF2014A for ; Wed, 26 Nov 2014 11:51:02 +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 1Xtb5U-0003mR-Ru; Wed, 26 Nov 2014 11:48:48 +0000 Received: from mail-by2on0122.outbound.protection.outlook.com ([207.46.100.122] helo=na01-by2-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Xtb5G-0003hF-SR for linux-arm-kernel@lists.infradead.org; Wed, 26 Nov 2014 11:48:36 +0000 Received: from CY1PR0301MB1305.namprd03.prod.outlook.com (25.161.212.15) by CY1PR0301MB0604.namprd03.prod.outlook.com (25.160.142.23) with Microsoft SMTP Server (TLS) id 15.1.26.15; Wed, 26 Nov 2014 11:48:13 +0000 Received: from CH1PR03CA010.namprd03.prod.outlook.com (10.255.156.155) by CY1PR0301MB1305.namprd03.prod.outlook.com (25.161.212.15) with Microsoft SMTP Server (TLS) id 15.1.26.15; Wed, 26 Nov 2014 11:48:12 +0000 Received: from BY2FFO11FD060.protection.gbl (10.255.156.132) by CH1PR03CA010.outlook.office365.com (10.255.156.155) with Microsoft SMTP Server (TLS) id 15.1.26.15 via Frontend Transport; Wed, 26 Nov 2014 11:48:11 +0000 Received: from az84smr01.freescale.net (192.88.158.2) by BY2FFO11FD060.mail.protection.outlook.com (10.1.15.184) with Microsoft SMTP Server (TLS) id 15.1.6.13 via Frontend Transport; Wed, 26 Nov 2014 11:48:10 +0000 Received: from b45370.ap.freescale.net (B45370-01.ap.freescale.net [10.232.40.106]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id sAQBlUlk005359; Wed, 26 Nov 2014 04:48:06 -0700 From: Bhupesh Sharma To: , , , Subject: [PATCH v6 1/6] Documentation: DT: Add bindings for FSL NS16550A UART Date: Wed, 26 Nov 2014 17:17:22 +0530 Message-ID: <1417002447-19163-2-git-send-email-bhupesh.sharma@freescale.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1417002447-19163-1-git-send-email-bhupesh.sharma@freescale.com> References: <1417002447-19163-1-git-send-email-bhupesh.sharma@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.158.2; CTRY:US; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10019020)(6009001)(189002)(199003)(92566001)(2201001)(21056001)(92726001)(105606002)(50986999)(76176999)(99396003)(48376002)(106466001)(81156004)(93916002)(46102003)(229853001)(86362001)(62966003)(50466002)(97736003)(77156002)(19580395003)(19580405001)(95666004)(68736004)(107046002)(69596002)(104016003)(102836001)(6806004)(104166001)(44976005)(20776003)(47776003)(64706001)(87936001)(84676001)(88136002)(87286001)(89996001)(33646002)(120916001)(4396001)(36756003)(31966008)(50226001)(7059030); DIR:OUT; SFP:1102; SCL:1; SRVR:CY1PR0301MB1305; H:az84smr01.freescale.net; FPR:; SPF:Fail; MLV:sfv; PTR:InfoDomainNonexistent; MX:1; A:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: UriScan:;UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:CY1PR0301MB1305; X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:; SRVR:CY1PR0301MB1305; X-Forefront-PRVS: 04073E895A 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-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:; SRVR:CY1PR0301MB1305; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:CY1PR0301MB0604; X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141126_034834_979862_356494C4 X-CRM114-Status: UNSURE ( 8.33 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.0 (/) Cc: rob.herring@linaro.org, bhupesh.sharma@freescale.com, stuart.yoder@freescale.com, grant.likely@secretlab.ca, arnab_basu@rocketmail.com, bhupesh.linux@gmail.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=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, T_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 Acked-by: Mark Rutland --- .../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 8c4fd03..1b3220b 100644 --- a/Documentation/devicetree/bindings/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/serial/of-serial.txt @@ -15,6 +15,7 @@ Required properties: - "altr,16550-FIFO64" - "altr,16550-FIFO128" - "fsl,16550-FIFO64" + - "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: driver is allowed to detect support for the capability even without this property. +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 {