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authorGeert Uytterhoeven <geert+renesas@linux-m68k.org>2014-02-25 14:40:17 +0400
committerMark Brown <broonie@linaro.org>2014-02-27 08:51:29 +0400
commitdc64d39b54c1e9db97a6fb1ca52598c981728157 (patch)
tree4e68275a6ecd75f7ea65bd9d7d66c4007e1b1754 /drivers/spi/spidev.c
parente6456186cae76f80446ba911f77eb2f85d3d927e (diff)
downloadlinux-dc64d39b54c1e9db97a6fb1ca52598c981728157.tar.xz
spi: spidev: Add support for Dual/Quad SPI Transfers
Add support for Dual/Quad SPI Transfers to the spidev API. As this uses SPI mode bits that don't fit in a single byte, two new ioctls (SPI_IOC_RD_MODE32 and SPI_IOC_WR_MODE32) are introduced. Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spidev.c')
-rw-r--r--drivers/spi/spidev.c19
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 2abc0f5a82be..e3bc23bb5883 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -73,7 +73,8 @@ static DECLARE_BITMAP(minors, N_SPI_MINORS);
*/
#define SPI_MODE_MASK (SPI_CPHA | SPI_CPOL | SPI_CS_HIGH \
| SPI_LSB_FIRST | SPI_3WIRE | SPI_LOOP \
- | SPI_NO_CS | SPI_READY)
+ | SPI_NO_CS | SPI_READY | SPI_TX_DUAL \
+ | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD)
struct spidev_data {
dev_t devt;
@@ -265,6 +266,8 @@ static int spidev_message(struct spidev_data *spidev,
buf += k_tmp->len;
k_tmp->cs_change = !!u_tmp->cs_change;
+ k_tmp->tx_nbits = u_tmp->tx_nbits;
+ k_tmp->rx_nbits = u_tmp->rx_nbits;
k_tmp->bits_per_word = u_tmp->bits_per_word;
k_tmp->delay_usecs = u_tmp->delay_usecs;
k_tmp->speed_hz = u_tmp->speed_hz;
@@ -359,6 +362,10 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
retval = __put_user(spi->mode & SPI_MODE_MASK,
(__u8 __user *)arg);
break;
+ case SPI_IOC_RD_MODE32:
+ retval = __put_user(spi->mode & SPI_MODE_MASK,
+ (__u32 __user *)arg);
+ break;
case SPI_IOC_RD_LSB_FIRST:
retval = __put_user((spi->mode & SPI_LSB_FIRST) ? 1 : 0,
(__u8 __user *)arg);
@@ -372,7 +379,11 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
/* write requests */
case SPI_IOC_WR_MODE:
- retval = __get_user(tmp, (u8 __user *)arg);
+ case SPI_IOC_WR_MODE32:
+ if (cmd == SPI_IOC_WR_MODE)
+ retval = __get_user(tmp, (u8 __user *)arg);
+ else
+ retval = __get_user(tmp, (u32 __user *)arg);
if (retval == 0) {
u32 save = spi->mode;
@@ -382,12 +393,12 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
}
tmp |= spi->mode & ~SPI_MODE_MASK;
- spi->mode = (u8)tmp;
+ spi->mode = (u16)tmp;
retval = spi_setup(spi);
if (retval < 0)
spi->mode = save;
else
- dev_dbg(&spi->dev, "spi mode %02x\n", tmp);
+ dev_dbg(&spi->dev, "spi mode %x\n", tmp);
}
break;
case SPI_IOC_WR_LSB_FIRST: