From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ricardo Ribalda Delgado Subject: [PATCH 3/3] spi/xilinx: Support for spi mode LOOP Date: Wed, 21 Jan 2015 16:53:10 +0100 Message-ID: <1421855590-9210-4-git-send-email-ricardo.ribalda@gmail.com> References: <1421855590-9210-1-git-send-email-ricardo.ribalda@gmail.com> Cc: Ricardo Ribalda Delgado To: Mark Brown , Michal Simek , =?UTF-8?q?S=C3=B6ren=20Brinkmann?= , linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Return-path: In-Reply-To: <1421855590-9210-1-git-send-email-ricardo.ribalda@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org Hardware supports LOOP mode. Support it also in the driver. Signed-off-by: Ricardo Ribalda Delgado --- drivers/spi/spi-xilinx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index b8ce58d..f6ceb60 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 -- 2.1.4