From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754205Ab3AGKlb (ORCPT ); Mon, 7 Jan 2013 05:41:31 -0500 Received: from mga03.intel.com ([143.182.124.21]:33340 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753662Ab3AGKlR (ORCPT ); Mon, 7 Jan 2013 05:41:17 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,423,1355126400"; d="scan'208";a="188437136" From: Mika Westerberg To: linux-kernel@vger.kernel.org Cc: grant.likely@secretlab.ca, linus.walleij@linaro.org, eric.y.miao@gmail.com, linux@arm.linux.org.uk, haojian.zhuang@gmail.com, broonie@opensource.wolfsonmicro.com, chao.bi@intel.com, "Rafael J. Wysocki" , Mika Westerberg Subject: [PATCH 09/11] spi/pxa2xx: add support for SPI_LOOP Date: Mon, 7 Jan 2013 12:44:38 +0200 Message-Id: <1357555480-24022-10-git-send-email-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 1.7.9.1 In-Reply-To: <1357555480-24022-1-git-send-email-mika.westerberg@linux.intel.com> References: <1357555480-24022-1-git-send-email-mika.westerberg@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is useful when testing the functionality of the controller from userspace and there aren't any real SPI slave devices connected to the bus. Signed-off-by: Mika Westerberg --- drivers/spi/spi-pxa2xx.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index f36d7c3..cfc4444 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1813,6 +1813,9 @@ static int setup(struct spi_device *spi) chip->cr1 |= (((spi->mode & SPI_CPHA) != 0) ? SSCR1_SPH : 0) | (((spi->mode & SPI_CPOL) != 0) ? SSCR1_SPO : 0); + if (spi->mode & SPI_LOOP) + chip->cr1 |= SSCR1_LBM; + /* NOTE: PXA25x_SSP _could_ use external clocking ... */ if (!pxa25x_ssp_comp(drv_data)) dev_dbg(&spi->dev, "%ld Hz actual, %s\n", @@ -1906,7 +1909,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) master->dev.parent = &pdev->dev; master->dev.of_node = pdev->dev.of_node; /* the spi->mode bits understood by this driver: */ - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP; master->bus_num = ssp->port_id; master->num_chipselect = platform_info->num_chipselect; -- 1.7.10.4