omap3: nand: configurable transfer type per board

nand transfer type (sDMA, Polled, prefetch) can be select from board file,
enabling all transfer type in driver, by default.

this helps in multi-omap build and to select different transfer type for
different board.

Signed-off-by: Sukumar Ghorai <s-ghorai@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/plat/nand.h b/arch/arm/plat-omap/include/plat/nand.h
index 6562cd082bb1..78c0bdb98c18 100644
--- a/arch/arm/plat-omap/include/plat/nand.h
+++ b/arch/arm/plat-omap/include/plat/nand.h
@@ -10,6 +10,12 @@
 
 #include <linux/mtd/partitions.h>
 
+enum nand_io {
+        NAND_OMAP_PREFETCH_POLLED = 0,  /* prefetch polled mode, default */
+        NAND_OMAP_POLLED,               /* polled mode, without prefetch */
+        NAND_OMAP_PREFETCH_DMA          /* prefetch enabled sDMA mode */
+};
+
 struct omap_nand_platform_data {
         unsigned int            options;
         int                     cs;
@@ -20,6 +26,7 @@ struct omap_nand_platform_data {
         int                     (*nand_setup)(void);
         int                     (*dev_ready)(struct omap_nand_platform_data *);
         int                     dma_channel;
+        enum nand_io            xfer_type;
         unsigned long           phys_base;
         int                     devsize;
 };