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: 5687691 Return-Path: X-Original-To: patchwork-linux-spi@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 2D360C058D for ; Thu, 22 Jan 2015 19:37:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 62884201BB for ; Thu, 22 Jan 2015 19:37:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8646720254 for ; Thu, 22 Jan 2015 19:37:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754704AbbAVTgz (ORCPT ); Thu, 22 Jan 2015 14:36:55 -0500 Received: from mail-lb0-f178.google.com ([209.85.217.178]:62267 "EHLO mail-lb0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753381AbbAVTgw (ORCPT ); Thu, 22 Jan 2015 14:36:52 -0500 Received: by mail-lb0-f178.google.com with SMTP id u10so3398566lbd.9; 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 Cc: Ricardo Ribalda Delgado 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> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, 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;