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path: root/drivers/spi/pxa2xx_spi.c
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Diffstat (limited to 'drivers/spi/pxa2xx_spi.c')
-rw-r--r--drivers/spi/pxa2xx_spi.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index 9f2c887ffa04..e51311b2da0b 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -1067,6 +1067,9 @@ static int transfer(struct spi_device *spi, struct spi_message *msg)
return 0;
}
+/* the spi->mode bits understood by this driver: */
+#define MODEBITS (SPI_CPOL | SPI_CPHA)
+
static int setup(struct spi_device *spi)
{
struct pxa2xx_spi_chip *chip_info = NULL;
@@ -1093,6 +1096,12 @@ static int setup(struct spi_device *spi)
return -EINVAL;
}
+ if (spi->mode & ~MODEBITS) {
+ dev_dbg(&spi->dev, "setup: unsupported mode bits %x\n",
+ spi->mode & ~MODEBITS);
+ return -EINVAL;
+ }
+
/* Only alloc on first setup */
chip = spi_get_ctldata(spi);
if (!chip) {