From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from buildserver.ru.mvista.com (unknown [85.21.88.6]) by ozlabs.org (Postfix) with ESMTP id D474BDE0FB for ; Thu, 26 Jul 2007 23:51:27 +1000 (EST) Date: Thu, 26 Jul 2007 17:51:06 +0400 From: Anton Vorontsov To: spi-devel-general@lists.sourceforge.net Subject: [PATCH 3/3] [POWERPC][SPI] spi_mpc83xx: add support for loopback mode Message-ID: <20070726135106.GC5550@localhost.localdomain> References: <20070726134754.GA3539@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 In-Reply-To: <20070726134754.GA3539@localhost.localdomain> Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Signed-off-by: Anton Vorontsov --- drivers/spi/spi_mpc83xx.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c index 458075a..e9582d3 100644 --- a/drivers/spi/spi_mpc83xx.c +++ b/drivers/spi/spi_mpc83xx.c @@ -39,6 +39,7 @@ struct mpc83xx_spi_reg { }; /* SPI Controller mode register definitions */ +#define SPMODE_LOOP (1 << 30) #define SPMODE_CI_INACTIVEHIGH (1 << 29) #define SPMODE_CP_BEGIN_EDGECLK (1 << 28) #define SPMODE_DIV16 (1 << 27) @@ -155,7 +156,7 @@ 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_REV); + SPMODE_REV | SPMODE_LOOP); if (spi->mode & SPI_CPHA) regval |= SPMODE_CP_BEGIN_EDGECLK; @@ -163,6 +164,8 @@ static void mpc83xx_spi_chipselect(struct spi_device *spi, int value) regval |= SPMODE_CI_INACTIVEHIGH; if (!(spi->mode & SPI_LSB_FIRST)) regval |= SPMODE_REV; + if (spi->mode & SPI_LOOP) + regval |= SPMODE_LOOP; regval |= SPMODE_LEN(len); @@ -273,7 +276,8 @@ 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 | SPI_LSB_FIRST) +#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST | \ + SPI_LOOP) static int mpc83xx_spi_setup(struct spi_device *spi) { -- 1.5.0.6