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[2/3] spi/xilinx: Support for spi mode LSB_FIRST

Message ID 1421855590-9210-3-git-send-email-ricardo.ribalda@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ricardo Ribalda Delgado Jan. 21, 2015, 3:53 p.m. UTC 
Hardware supports LSB_FIRST mode. Support it also in the driver.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/spi/spi-xilinx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index 2ea4ca5..b8ce58d 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -34,7 +34,8 @@ 
 #define XSPI_CR_MASTER_MODE	0x04
 #define XSPI_CR_CPOL		0x08
 #define XSPI_CR_CPHA		0x10
-#define XSPI_CR_MODE_MASK	(XSPI_CR_CPHA | XSPI_CR_CPOL)
+#define XSPI_CR_MODE_MASK	(XSPI_CR_CPHA | XSPI_CR_CPOL | \
+				 XSPI_CR_LSB_FIRST)
 #define XSPI_CR_TXFIFO_RESET	0x20
 #define XSPI_CR_RXFIFO_RESET	0x40
 #define XSPI_CR_MANUAL_SSELECT	0x80
@@ -194,6 +195,8 @@  static void xilinx_spi_chipselect(struct spi_device *spi, int is_on)
 			cr |= XSPI_CR_CPHA;
 		if (spi->mode & SPI_CPOL)
 			cr |= XSPI_CR_CPOL;
+		if (spi->mode & SPI_LSB_FIRST)
+			cr |= XSPI_CR_LSB_FIRST;
 		xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET);
 
 		/* We do not check spi->max_speed_hz here as the SPI clock