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path: root/drivers/spi/omap3_spi.c
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Diffstat (limited to 'drivers/spi/omap3_spi.c')
-rw-r--r--drivers/spi/omap3_spi.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c
index 47f9e56..e40a632 100644
--- a/drivers/spi/omap3_spi.c
+++ b/drivers/spi/omap3_spi.c
@@ -173,8 +173,18 @@ int spi_claim_bus(struct spi_slave *slave)
/* standard 4-wire master mode: SCK, MOSI/out, MISO/in, nCS
* REVISIT: this controller could support SPI_3WIRE mode.
*/
+#ifdef CONFIG_AM33XX
+ /*
+ * The reference design on AM33xx has D0 and D1 wired up opposite
+ * of how it has been done on previous platforms. We assume that
+ * custom hardware will also follow this convention.
+ */
+ conf &= OMAP3_MCSPI_CHCONF_DPE0;
+ conf |= ~(OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1);
+#else
conf &= ~(OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1);
conf |= OMAP3_MCSPI_CHCONF_DPE0;
+#endif
/* wordlength */
conf &= ~OMAP3_MCSPI_CHCONF_WL_MASK;