omap3: nand: ecc layout select from board file

This patch makes it possible to select sw or hw (different layout options)
ecc scheme supported by omap nand driver.

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

3 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-flash.c b/arch/arm/mach-omap2/board-flash.c
index 19645095d597..a76819812019 100644
--- a/arch/arm/mach-omap2/board-flash.c
+++ b/arch/arm/mach-omap2/board-flash.c
@@ -148,6 +148,7 @@ __init board_nand_init(struct mtd_partition *nand_parts,
         board_nand_data.nr_parts        = nr_parts;
         board_nand_data.devsize         = nand_type;
 
+        board_nand_data.ecc_opt = OMAP_ECC_HAMMING_CODE_DEFAULT;
         board_nand_data.gpmc_irq = OMAP_GPMC_IRQ_BASE + cs;
         gpmc_nand_init(&board_nand_data);
 }
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h
index a2434639063d..773351bc25a2 100644
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -86,6 +86,12 @@
 #define PREFETCH_FIFOTHRESHOLD_MAX      0x40
 #define PREFETCH_FIFOTHRESHOLD(val)     ((val) << 8)
 
+enum omap_ecc {
+                /* 1-bit ecc: stored at end of spare area */
+        OMAP_ECC_HAMMING_CODE_DEFAULT = 0, /* Default, s/w method */
+        OMAP_ECC_HAMMING_CODE_HW, /* gpmc to detect the error */
+};
+
 /*
  * Note that all values in this struct are in nanoseconds except sync_clk
  * (which is in picoseconds), while the register values are in gpmc_fck cycles.
diff --git a/arch/arm/plat-omap/include/plat/nand.h b/arch/arm/plat-omap/include/plat/nand.h
index ae5e05383031..d86d1ecf0068 100644
--- a/arch/arm/plat-omap/include/plat/nand.h
+++ b/arch/arm/plat-omap/include/plat/nand.h
@@ -8,6 +8,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <plat/gpmc.h>
 #include <linux/mtd/partitions.h>
 
 enum nand_io {
@@ -31,6 +32,7 @@ struct omap_nand_platform_data {
         enum nand_io            xfer_type;
         unsigned long           phys_base;
         int                     devsize;
+        enum omap_ecc           ecc_opt;
 };
 
 /* minimum size for IO mapping */