From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anton Vorontsov Subject: [PATCH 3/4] [POWERPC][SPI] spi_mpc83xx: support for lsb mode switching Date: Thu, 26 Jul 2007 17:14:17 +0400 Message-ID: <20070726131417.GC3417@localhost.localdomain> References: <20070726131134.GA3309@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: Content-Disposition: inline In-Reply-To: <20070726131134.GA3309-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org Signed-off-by: Anton Vorontsov --- drivers/spi/spi_mpc83xx.c | 13 +++++++++---- 1 files changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c index e2d8dbc..7e17c8b 100644 --- a/drivers/spi/spi_mpc83xx.c +++ b/drivers/spi/spi_mpc83xx.c @@ -154,12 +154,15 @@ static void mpc83xx_spi_chipselect(struct spi_device *spi, int value) /* mask out bits we are going to set */ regval &= ~(SPMODE_CP_BEGIN_EDGECLK | SPMODE_CI_INACTIVEHIGH | - SPMODE_LEN(0xF) | SPMODE_DIV16 | SPMODE_PM(0xF)); + SPMODE_LEN(0xF) | SPMODE_DIV16 | SPMODE_PM(0xF) | \ + SPMODE_REV); if (spi->mode & SPI_CPHA) regval |= SPMODE_CP_BEGIN_EDGECLK; if (spi->mode & SPI_CPOL) regval |= SPMODE_CI_INACTIVEHIGH; + if (!(spi->mode & SPI_LSB_FIRST)) + regval |= SPMODE_REV; regval |= SPMODE_LEN(len); @@ -248,9 +251,11 @@ int mpc83xx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) regval = mpc83xx_spi_read_reg(&mpc83xx_spi->base->mode); - /* Mask out bits_per_wordgth */ - regval &= ~SPMODE_LEN(0xF); + /* mask out bits we are going to set */ + regval &= ~(SPMODE_LEN(0xF) | SPMODE_REV); regval |= SPMODE_LEN(bits_per_word); + if (!(spi->mode & SPI_LSB_FIRST)) + regval |= SPMODE_REV; /* Turn off SPI unit prior changing mode */ mpc83xx_spi_write_reg(&mpc83xx_spi->base->mode, 0); @@ -260,7 +265,7 @@ int mpc83xx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) } /* the spi->mode bits understood by this driver: */ -#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH) +#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST) static int mpc83xx_spi_setup(struct spi_device *spi) { -- 1.5.0.6 ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/