X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fspi%2Fau1550_spi.c;h=c47a650183a14beeec627db2f439d47b7a08c401;hb=a482958bf60c434dc12ea0491938c8853d9774fb;hp=ae2b1af0dba48a6f7975fcfcdec95b62e63090e2;hpb=02a93208edec0d655c9f18613d830dc6afeda7d4;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/spi/au1550_spi.c b/drivers/spi/au1550_spi.c
index ae2b1af0dba..c47a650183a 100644
--- a/drivers/spi/au1550_spi.c
+++ b/drivers/spi/au1550_spi.c
@@ -280,6 +280,9 @@ static int au1550_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
 	return 0;
 }
 
+/* the spi->mode bits understood by this driver: */
+#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST)
+
 static int au1550_spi_setup(struct spi_device *spi)
 {
 	struct au1550_spi *hw = spi_master_get_devdata(spi->master);
@@ -292,6 +295,12 @@ static int au1550_spi_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;
+	}
+
 	if (spi->max_speed_hz == 0)
 		spi->max_speed_hz = hw->freq_max;
 	if (spi->max_speed_hz > hw->freq_max