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| author | Martin Sperl <kernel@martin.sperl.org> | 2015-03-19 09:01:53 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-03-23 11:54:34 -0700 |
| commit | 6935224da2482a261c786501fbccb1dc4a675225 (patch) | |
| tree | 56fd215b05bc43b505ce124ebdf3c22bbc20c46d /drivers/spi/spi-bcm2835.c | |
| parent | 210b49231af6a3ede5de3c90850dbf1134a855c2 (diff) | |
| download | lwn-6935224da2482a261c786501fbccb1dc4a675225.tar.gz lwn-6935224da2482a261c786501fbccb1dc4a675225.zip | |
spi: bcm2835: enable support of 3-wire mode
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-bcm2835.c')
| -rw-r--r-- | drivers/spi/spi-bcm2835.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index 8de1925fe554..3f93718aad3f 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" @@ -163,6 +164,9 @@ static int bcm2835_spi_start_transfer(struct spi_device *spi, 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) |