From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753998AbbAVTg4 (ORCPT ); Thu, 22 Jan 2015 14:36:56 -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 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-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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; -- 2.1.4