diff options
Diffstat (limited to 'drivers/spi/spi_s3c24xx.c')
| -rw-r--r-- | drivers/spi/spi_s3c24xx.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c index d5a710f6e44..7071ff8da63 100644 --- a/drivers/spi/spi_s3c24xx.c +++ b/drivers/spi/spi_s3c24xx.c @@ -146,6 +146,9 @@ static int s3c24xx_spi_setupxfer(struct spi_device *spi, return 0; } +/* the spi->mode bits understood by this driver: */ +#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH) + static int s3c24xx_spi_setup(struct spi_device *spi) { int ret; @@ -153,8 +156,11 @@ static int s3c24xx_spi_setup(struct spi_device *spi) if (!spi->bits_per_word) spi->bits_per_word = 8; - if ((spi->mode & SPI_LSB_FIRST) != 0) + if (spi->mode & ~MODEBITS) { + dev_dbg(&spi->dev, "setup: unsupported mode bits %x\n", + spi->mode & ~MODEBITS); return -EINVAL; + } ret = s3c24xx_spi_setupxfer(spi, NULL); if (ret < 0) { |