From: Martin Sperl <[email protected]>
Signed-off-by: Martin Sperl <[email protected]>
---
drivers/spi/spi-bcm2835.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index e1dea40..51883f8 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -67,7 +67,8 @@
#define BCM2835_SPI_CS_CS_01 0x00000001
#define BCM2835_SPI_TIMEOUT_MS 30000
-#define BCM2835_SPI_MODE_BITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_NO_CS)
+#define BCM2835_SPI_MODE_BITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH \
+ | SPI_NO_CS | SPI_3WIRE)
#define DRV_NAME "spi-bcm2835"
@@ -201,6 +202,9 @@ static int bcm2835_spi_start_transfer(
cdiv = 0; /* 0 is the slowest we can go */
}
+ if ((spi->mode & SPI_3WIRE) && (tfr->rx_buf))
+ cs |= BCM2835_SPI_CS_REN;
+
if (spi->mode & SPI_CPOL)
cs |= BCM2835_SPI_CS_CPOL;
if (spi->mode & SPI_CPHA)
--
1.7.10.4
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