From patchwork Thu Mar 4 07:11:56 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: manjugk manjugk X-Patchwork-Id: 83540 X-Patchwork-Delegate: tony@atomide.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o246nCft017845 for ; Thu, 4 Mar 2010 06:53:16 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753316Ab0CDGxP (ORCPT ); Thu, 4 Mar 2010 01:53:15 -0500 Received: from bear.ext.ti.com ([192.94.94.41]:52466 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753065Ab0CDGxP (ORCPT ); Thu, 4 Mar 2010 01:53:15 -0500 Received: from dlep34.itg.ti.com ([157.170.170.115]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id o246rEVx032005 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 4 Mar 2010 00:53:15 -0600 Received: from localhost.localdomain (localhost [127.0.0.1]) by dlep34.itg.ti.com (8.13.7/8.13.7) with ESMTP id o246rC3D025332 for ; Thu, 4 Mar 2010 00:53:13 -0600 (CST) From: Manjunatha GK To: linux-omap@vger.kernel.org Subject: [PATCH v2] OMAP: DMA: Init CDAC to zero Date: Thu, 4 Mar 2010 12:41:56 +0530 Message-Id: <1267686716-22264-1-git-send-email-manjugk@ti.com> X-Mailer: git-send-email 1.6.0.4 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Thu, 04 Mar 2010 06:53:16 +0000 (UTC) diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index 2ab224c..f6c9bdc 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -936,6 +936,15 @@ void omap_start_dma(int lch) { u32 l; + /* + * The CPC/CDAC register needs to be initialized to zero + * before starting dma transfer. + */ + if (cpu_is_omap15xx()) + dma_write(0, CPC(lch)); + else + dma_write(0, CDAC(lch)); + if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) { int next_lch, cur_lch; char dma_chan_link_map[OMAP_DMA4_LOGICAL_DMA_CH_COUNT];