From mboxrd@z Thu Jan 1 00:00:00 1970 From: kernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org Subject: [PATCH] SPI: BCM2835: enable support of 3-wire mode Date: Thu, 19 Mar 2015 09:01:53 +0000 Message-ID: <1426755714-28130-4-git-send-email-kernel@martin.sperl.org> References: <1426755714-28130-1-git-send-email-kernel@martin.sperl.org> Cc: Martin Sperl To: broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, warren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org, lee-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Return-path: In-Reply-To: <1426755714-28130-1-git-send-email-kernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org> Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: From: Martin Sperl Signed-off-by: Martin Sperl --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html