From patchwork Tue Sep 6 07:58:30 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomoya X-Patchwork-Id: 1125692 Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p8680WtZ020344 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 6 Sep 2011 08:00:53 GMT Received: from localhost ([127.0.0.1] helo=sfs-ml-4.v29.ch3.sourceforge.com) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1R0qa8-0000IX-Lf; Tue, 06 Sep 2011 08:00:32 +0000 Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1R0qa7-0000IR-Hd for spi-devel-general@lists.sourceforge.net; Tue, 06 Sep 2011 08:00:31 +0000 X-ACL-Warn: Received: from sm-d311v.smileserver.ne.jp ([203.211.202.206]) by sog-mx-4.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1R0qa1-0005VA-5r for spi-devel-general@lists.sourceforge.net; Tue, 06 Sep 2011 08:00:31 +0000 X-Virus-Status: clean(F-Secure/virusgw_smtp/403/viruscheck1-00.private.hosting-pf.net) Received: from localhost.localdomain (113x35x143x224.ap113.ftth.ucom.ne.jp [113.35.143.224]) by sm-d311v.smileserver.ne.jp (mail) with ESMTPSA id 04B4996D7D; Tue, 6 Sep 2011 17:00:17 +0900 (JST) From: Tomoya MORINAGA To: Grant Likely , spi-devel-general@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: [PATCH 1/5] spi-topcliff-pch: add tx-memory clear after complete transmitting Date: Tue, 6 Sep 2011 16:58:30 +0900 Message-Id: <1315295914-6862-1-git-send-email-tomoya-linux@dsn.okisemi.com> X-Mailer: git-send-email 1.7.4.4 X-Spam-Score: 0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. X-Headers-End: 1R0qa1-0005VA-5r Cc: qi.wang@intel.com, yong.y.wang@intel.com, Tomoya MORINAGA , toshiharu-linux@dsn.okisemi.com, kok.howg.ewe@intel.com, joel.clark@intel.com X-BeenThere: spi-devel-general@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Linux SPI core/device drivers discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: spi-devel-general-bounces@lists.sourceforge.net X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Tue, 06 Sep 2011 08:00:53 +0000 (UTC) Currently, in case of reading date from SPI flash, command is sent twice. The cause is that tx-memory clear processing is missing . This patch adds the tx-momory clear processing. Signed-off-by: Tomoya MORINAGA --- drivers/spi/spi-topcliff-pch.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 540c290..1b98b7e 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -839,6 +839,11 @@ static void pch_spi_start_transfer(struct pch_spi_data *data) dma_sync_sg_for_cpu(&data->master->dev, dma->sg_rx_p, dma->nent, DMA_FROM_DEVICE); + + dma_sync_sg_for_cpu(&data->master->dev, dma->sg_tx_p, dma->nent, + DMA_FROM_DEVICE); + memset(data->dma.tx_buf_virt, 0, PAGE_SIZE); + async_tx_ack(dma->desc_rx); async_tx_ack(dma->desc_tx); kfree(dma->sg_tx_p);