From patchwork Mon Jul 22 08:30:31 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Song, Elen" X-Patchwork-Id: 2831174 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 D9B81C0319 for ; Mon, 22 Jul 2013 09:14:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B843420171 for ; Mon, 22 Jul 2013 09:14:15 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9DF9420148 for ; Mon, 22 Jul 2013 09:14:12 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1V1Bgc-0003P5-Tw; Mon, 22 Jul 2013 08:41:44 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1V1BfR-0001ak-8G; Mon, 22 Jul 2013 08:40:29 +0000 Received: from nasmtp01.atmel.com ([192.199.1.245] helo=DVREDG01.corp.atmel.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1V1BfN-0001Zk-W7 for linux-arm-kernel@lists.infradead.org; Mon, 22 Jul 2013 08:40:27 +0000 Received: from apsmtp01.atmel.com (10.168.254.31) by DVREDG01.corp.atmel.com (10.42.103.30) with Microsoft SMTP Server (TLS) id 14.2.342.3; Mon, 22 Jul 2013 02:40:03 -0600 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.atmel.com (10.168.254.31) with Microsoft SMTP Server id 14.2.342.3; Mon, 22 Jul 2013 16:41:09 +0800 From: Elen Song To: , , Subject: [PATCH 8/8 V3] serial: at91: add dma support in usart binding descriptions Date: Mon, 22 Jul 2013 16:30:31 +0800 Message-ID: <1374481831-24573-9-git-send-email-elen.song@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1374481831-24573-1-git-send-email-elen.song@atmel.com> References: <1374481831-24573-1-git-send-email-elen.song@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130722_044026_217266_3FCF81EA X-CRM114-Status: UNSURE ( 7.66 ) X-CRM114-Notice: Please train this message. X-Spam-Note: SpamAssassin invocation failed Cc: gregkh@linuxfoundation.org, elen.song@atmel.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 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=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Signed-off-by: Elen Song --- .../devicetree/bindings/tty/serial/atmel-usart.txt | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt b/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt index a49d9a1..2191dcb 100644 --- a/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt +++ b/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt @@ -10,13 +10,18 @@ Required properties: Optional properties: - atmel,use-dma-rx: use of PDC or DMA for receiving data - atmel,use-dma-tx: use of PDC or DMA for transmitting data +- add dma bindings for dma transfer: + - dmas: DMA specifier, consisting of a phandle to DMA controller node, + memory peripheral interface and USART DMA channel ID, FIFO configuration. + Refer to dma.txt and atmel-dma.txt for details. + - dma-names: "rx" for RX channel, "tx" for TX channel. compatible description: - at91rm9200: legacy USART support - at91sam9260: generic USART implementation for SAM9 SoCs Example: - +- use PDC: usart0: serial@fff8c000 { compatible = "atmel,at91sam9260-usart"; reg = <0xfff8c000 0x4000>; @@ -25,3 +30,14 @@ Example: atmel,use-dma-tx; }; +- use DMA: + usart0: serial@f001c000 { + compatible = "atmel,at91sam9260-usart"; + reg = <0xf001c000 0x100>; + interrupts = <12 4 5>; + atmel,use-dma-rx; + atmel,use-dma-tx; + dmas = <&dma0 2 0x3>, + <&dma0 2 0x204>; + dma-names = "tx", "rx"; + };