From patchwork Thu Jan 22 19:36:42 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda Delgado X-Patchwork-Id: 5687731 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 [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id C8FFBC058D for ; Thu, 22 Jan 2015 19:39:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 012D5201BB for ; Thu, 22 Jan 2015 19:39:11 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 324FB20254 for ; Thu, 22 Jan 2015 19:39:10 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YENZJ-0008S5-Ni; Thu, 22 Jan 2015 19:37:29 +0000 Received: from mail-la0-x22b.google.com ([2a00:1450:4010:c03::22b]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YENZ2-0008G8-HK for linux-arm-kernel@lists.infradead.org; Thu, 22 Jan 2015 19:37:13 +0000 Received: by mail-la0-f43.google.com with SMTP id q1so3599626lam.2 for ; Thu, 22 Jan 2015 11:36:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=sJCEqlHiRMhmrR8WolX3w7GOzcu+dBkPDnvtvpTCEoo=; b=0uXHyIcE1v31GQ1rfnEZ4qSyh8PNkrB3TWe5Urz69zoYPS0LTn426wTTYDRsU3838E SuuFIQ3PHA2Ywz8qatbQauMhIZr77/07xTBmYQi95KBWrB91Hs2tH123dWwx3QnhY4lc 1K4/dGOE33udvaubrtT4wUypbw15zE1bzrvIPp5m7qqogriWeXy8BgMTYTabGiKnSGYO PdYHEerOadkJ45uFHKinqLqHtAwmqvzOD9Kc8rvppR7vKX1sISCLzzWMylcPeOYD+VSS wehkhpRwBkCBspnY+OOVKJgAbSzE+stls5e12Z7+NfNSu7qShTv6FYQPSH0+yUXLj9O3 0CDw== X-Received: by 10.152.36.1 with SMTP id m1mr3476247laj.95.1421955410282; Thu, 22 Jan 2015 11:36:50 -0800 (PST) Received: from localhost.localdomain (x1-6-30-46-9a-6d-3c-54.cpe.webspeed.dk. [2.108.161.190]) by mx.google.com with ESMTPSA id nb1sm510068lbb.18.2015.01.22.11.36.48 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 22 Jan 2015 11:36:49 -0800 (PST) From: Ricardo Ribalda Delgado To: Mark Brown , Michal Simek , soren.brinkmann@xilinx.com, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] spi/xilinx: Support for spi mode LOOP Date: Thu, 22 Jan 2015 20:36:42 +0100 Message-Id: <1421955402-16379-2-git-send-email-ricardo.ribalda@gmail.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1421955402-16379-1-git-send-email-ricardo.ribalda@gmail.com> References: <1421955402-16379-1-git-send-email-ricardo.ribalda@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150122_113712_791096_9A9EFCFA X-CRM114-Status: GOOD ( 11.30 ) X-Spam-Score: -0.8 (/) Cc: Ricardo Ribalda Delgado X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 Hardware supports LOOP mode. Support it also in the driver. Signed-off-by: Ricardo Ribalda Delgado --- v2: -add mode_bits drivers/spi/spi-xilinx.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index d4edeee..e1d9a20 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -35,7 +35,7 @@ #define XSPI_CR_CPOL 0x08 #define XSPI_CR_CPHA 0x10 #define XSPI_CR_MODE_MASK (XSPI_CR_CPHA | XSPI_CR_CPOL | \ - XSPI_CR_LSB_FIRST) + XSPI_CR_LSB_FIRST | XSPI_CR_LOOP) #define XSPI_CR_TXFIFO_RESET 0x20 #define XSPI_CR_RXFIFO_RESET 0x40 #define XSPI_CR_MANUAL_SSELECT 0x80 @@ -197,6 +197,8 @@ static void xilinx_spi_chipselect(struct spi_device *spi, int is_on) cr |= XSPI_CR_CPOL; if (spi->mode & SPI_LSB_FIRST) cr |= XSPI_CR_LSB_FIRST; + if (spi->mode & SPI_LOOP) + cr |= XSPI_CR_LOOP; xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET); /* We do not check spi->max_speed_hz here as the SPI clock @@ -356,7 +358,7 @@ static int xilinx_spi_probe(struct platform_device *pdev) return -ENODEV; /* the spi->mode bits understood by this driver: */ - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_LOOP; xspi = spi_master_get_devdata(master); xspi->bitbang.master = master;