From patchwork Fri Oct 6 10:13:29 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 9988887 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AD89860247 for ; Fri, 6 Oct 2017 10:14:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A289628C2D for ; Fri, 6 Oct 2017 10:14:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 967FC28C7B; Fri, 6 Oct 2017 10:14:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2F44528C2D for ; Fri, 6 Oct 2017 10:14:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=nX8+zf+horOee2WB31nZVqLF1m+rl9nENhfQ1JD+I4s=; b=c66uifz2RO9RVVE+rYmhukeRkG MDHaQAye3oh/cytUJ5Dr5EhY2yFkoiwBytIEDDQsj8jyUzVM/duOYXiQcLdbd9v4OHbd5NiI9xMzn icGRbDTzC7LLDeMoZQrjnlS7CXkUl241gU41xm0NxaCELzJO+rY74EyPa77t0DuZUUrXX43kj4XNM Uj338Xy4VxVVI7K0Sju3IG2Ga8o8TuSAduJaaWiJpPCSJasjz9QFheQkDht/wY4gY2RhS9NOzuSPx UzKvD+Yl7GPE1z/i9ILXH2xOtd+3xFtqutYmpUdA/7aJLAWnw2pMIicv38437AhkTa2q9NWVwFs1+ 6nVCzIdA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1e0Pec-0000uu-9o; Fri, 06 Oct 2017 10:14:50 +0000 Received: from mail.free-electrons.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1e0PeA-0000Y7-Q6 for linux-arm-kernel@lists.infradead.org; Fri, 06 Oct 2017 10:14:24 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id AD2FD209A4; Fri, 6 Oct 2017 12:14:00 +0200 (CEST) Received: from localhost.localdomain (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 473DD20909; Fri, 6 Oct 2017 12:14:00 +0200 (CEST) From: Miquel Raynal To: Greg Kroah-Hartman , Linus Walleij , Jason Cooper , Andrew Lunn , Gregory Clement , Sebastian Hesselbarth , Jiri Slaby , Catalin Marinas , Will Deacon Subject: [PATCH 01/16] dt-bindings: mvebu-uart: update documentation with extended UART Date: Fri, 6 Oct 2017 12:13:29 +0200 Message-Id: <20171006101344.15590-2-miquel.raynal@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171006101344.15590-1-miquel.raynal@free-electrons.com> References: <20171006101344.15590-1-miquel.raynal@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20171006_031423_212204_56F3268E X-CRM114-Status: GOOD ( 12.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Petazzoni , devicetree@vger.kernel.org, Antoine Tenart , Nadav Haklai , linux-gpio@vger.kernel.org, linux-serial@vger.kernel.org, Miquel Raynal , Wilson Ding , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Update the Device Tree binding documentation for the Marvell EBU UART, in order to allow describing the extended UART IP block, in addition to the already supported standard UART IP. This requires adding a new compatible string, the introduction of a clocks property, and extensions to the interrupts property. Signed-off-by: Miquel Raynal Reviewed-by: Gregory CLEMENT --- .../devicetree/bindings/serial/mvebu-uart.txt | 49 +++++++++++++++++++--- 1 file changed, 44 insertions(+), 5 deletions(-) diff --git a/Documentation/devicetree/bindings/serial/mvebu-uart.txt b/Documentation/devicetree/bindings/serial/mvebu-uart.txt index d37fabe17bd1..3df3a3fab4bb 100644 --- a/Documentation/devicetree/bindings/serial/mvebu-uart.txt +++ b/Documentation/devicetree/bindings/serial/mvebu-uart.txt @@ -1,13 +1,52 @@ -* Marvell UART : Non standard UART used in some of Marvell EBU SoCs (e.g., Armada-3700) +* Marvell UART : Non standard UART used in some of Marvell EBU SoCs + e.g., Armada-3700. Required properties: -- compatible: "marvell,armada-3700-uart" +- compatible: + - "marvell,armada-3700-uart" for the standard variant of the UART + (32 bytes FIFO, no DMA, level interrupts, 8-bit access to the + FIFO, baudrate limited to 230400). + - "marvell,armada-3700-uart-ext" for the extended variant of the + UART (128 bytes FIFO, DMA, front interrupts, 8-bit or 32-bit + accesses to the FIFO, baudrate unlimited by the dividers). - reg: offset and length of the register set for the device. -- interrupts: device interrupt +- clocks: UART reference clock used to derive the baudrate (only + mandatory with "marvell,armada-3700-uart-ext" compatible). +- interrupts: + - Must contain three elements for the standard variant of the IP + (marvell,armada-3700-uart): "uart-sum", "uart-tx" and "uart-rx", + respectively the UART sum interrupt, the UART TX interrupt and + UART RX interrupt. A corresponding interrupt-names property must + be defined. + - Must contain two elements for the extended variant of the IP + (marvell,armada-3700-uart-ext): "uart-tx" and "uart-rx", + respectively the UART TX interrupt and the UART RX interrupt. A + corresponding interrupts-names property must be defined. + - For backward compatibility reasons, a single element interrupts + property is also supported for the standard variant of the IP, + containing only the UART sum interrupt. This form is deprecated + and should no longer be used. Example: - serial@12000 { + uart0: serial@12000 { compatible = "marvell,armada-3700-uart"; reg = <0x12000 0x200>; - interrupts = <43>; + clocks = <&xtalclk>; + interrupts = + , + , + ; + interrupt-names = "uart-sum", "uart-tx", "uart-rx"; + status = "disabled"; + }; + + uart1: serial@12200 { + compatible = "marvell,armada-3700-uart-ext"; + reg = <0x12200 0x30>; + clocks = <&xtalclk>; + interrupts = + , + ; + interrupt-names = "uart-tx", "uart-rx"; + status = "disabled"; };