From patchwork Tue Oct 19 10:03:27 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 265171 Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id o9J9xTBR009084 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 19 Oct 2010 09:59:50 GMT Received: from localhost ([127.0.0.1] helo=sfs-ml-2.v29.ch3.sourceforge.com) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1P88yX-0006YK-4b; Tue, 19 Oct 2010 09:59:21 +0000 Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1P88yV-0006Y2-RY for spi-devel-general@lists.sourceforge.net; Tue, 19 Oct 2010 09:59:19 +0000 Received-SPF: neutral (sog-mx-3.v43.ch3.sourceforge.com: 147.11.1.11 is neither permitted nor denied by domain of gmail.com) client-ip=147.11.1.11; envelope-from=jason77.wang@gmail.com; helo=mail.windriver.com; Received: from mail.windriver.com ([147.11.1.11]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69) id 1P88yU-0003wy-FH for spi-devel-general@lists.sourceforge.net; Tue, 19 Oct 2010 09:59:19 +0000 Received: from ALA-MAIL03.corp.ad.wrs.com (ala-mail03 [147.11.57.144]) by mail.windriver.com (8.14.3/8.14.3) with ESMTP id o9J9xAiM025226; Tue, 19 Oct 2010 02:59:10 -0700 (PDT) Received: from localhost.localdomain ([128.224.163.220]) by ALA-MAIL03.corp.ad.wrs.com with Microsoft SMTPSVC(6.0.3790.1830); Tue, 19 Oct 2010 02:59:09 -0700 From: Jason Wang To: grant.likely@secretlab.ca Subject: [PATCH] spi/omap2_mcspi: disable channel after TX_ONLY transfer in PIO mode Date: Tue, 19 Oct 2010 18:03:27 +0800 Message-Id: <1287482607-18912-1-git-send-email-jason77.wang@gmail.com> X-Mailer: git-send-email 1.5.6.5 X-OriginalArrivalTime: 19 Oct 2010 09:59:10.0132 (UTC) FILETIME=[46960F40:01CB6F74] X-Spam-Score: 1.9 (+) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 0.0 FREEMAIL_FROM Sender email is freemail (jason77.wang[at]gmail.com) 0.0 DKIM_ADSP_CUSTOM_MED No valid author signature, adsp_override is CUSTOM_MED 0.7 SPF_NEUTRAL SPF: sender does not match SPF record (neutral) 1.2 NML_ADSP_CUSTOM_MED ADSP custom_med hit, and not from a mailing list 0.0 T_TO_NO_BRKTS_FREEMAIL T_TO_NO_BRKTS_FREEMAIL X-Headers-End: 1P88yU-0003wy-FH Cc: tony@atomide.com, spi-devel-general@lists.sourceforge.net, linux-omap@vger.kernel.org, notasas@gmail.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-4.2.3 (demeter1.kernel.org [140.211.167.41]); Tue, 19 Oct 2010 09:59:50 +0000 (UTC) diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c index b3a94ca..43fab41 100644 --- a/drivers/spi/omap2_mcspi.c +++ b/drivers/spi/omap2_mcspi.c @@ -644,6 +644,12 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) } else if (mcspi_wait_for_reg_bit(chstat_reg, OMAP2_MCSPI_CHSTAT_EOT) < 0) dev_err(&spi->dev, "EOT timed out\n"); + + /* disable chan to purge rx datas received in TX_ONLY transfer, + * otherwise these rx datas will affect the direct following + * RX_ONLY transfer. + */ + omap2_mcspi_set_enable(spi, 0); } out: omap2_mcspi_set_enable(spi, 1);