diff options
Diffstat (limited to 'drivers/spi/mpc52xx_psc_spi.c')
| -rw-r--r-- | drivers/spi/mpc52xx_psc_spi.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/spi/mpc52xx_psc_spi.c b/drivers/spi/mpc52xx_psc_spi.c index 11f36bef305..d2a4b2bdb07 100644 --- a/drivers/spi/mpc52xx_psc_spi.c +++ b/drivers/spi/mpc52xx_psc_spi.c @@ -270,6 +270,9 @@ static void mpc52xx_psc_spi_work(struct work_struct *work) spin_unlock_irq(&mps->lock); } +/* the spi->mode bits understood by this driver: */ +#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST) + static int mpc52xx_psc_spi_setup(struct spi_device *spi) { struct mpc52xx_psc_spi *mps = spi_master_get_devdata(spi->master); @@ -279,6 +282,12 @@ static int mpc52xx_psc_spi_setup(struct spi_device *spi) if (spi->bits_per_word%8) return -EINVAL; + if (spi->mode & ~MODEBITS) { + dev_dbg(&spi->dev, "setup: unsupported mode bits %x\n", + spi->mode & ~MODEBITS); + return -EINVAL; + } + if (!cs) { cs = kzalloc(sizeof *cs, GFP_KERNEL); if (!cs) |