mtd: nand: omap: allow to switch to BCH16

support in omap_nand_switch_ecc() also an eccstrength
from 16.

Signed-off-by: Heiko Schocher <hs@denx.de>

arch/arm/cpu/armv7/omap3/board.c

@@ -280,6 +280,8 @@ static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const arg
 				omap_nand_switch_ecc(1, 1);
 			else if (strncmp(argv[2], "bch8", 4) == 0)
 				omap_nand_switch_ecc(1, 8);
+			else if (strncmp(argv[2], "bch16", 5) == 0)
+				omap_nand_switch_ecc(1, 16);
 			else
 				goto usage;
 		}
@@ -308,8 +310,8 @@ usage:
 U_BOOT_CMD(
 	nandecc, 3, 1,	do_switch_ecc,
 	"switch OMAP3 NAND ECC calculation algorithm",
-	"hw [hamming|bch8] - Switch between NAND hardware 1-bit hamming and"
-	" 8-bit BCH\n"
+	"hw [hamming|bch8|bch16] - Switch between NAND hardware 1-bit hamming"
+	" and 8-bit/16-bit BCH\n"
 	"                           ecc calculation (second parameter may"
 	" be omitted).\n"
 	"nandecc sw               - Switch to NAND software ecc algorithm."

drivers/mtd/nand/omap_gpmc.c

@@ -917,6 +917,10 @@ int __maybe_unused omap_nand_switch_ecc(uint32_t hardware, uint32_t eccstrength)
 			err = omap_select_ecc_scheme(nand,
 					OMAP_ECC_BCH8_CODE_HW,
 					mtd->writesize, mtd->oobsize);
+		} else if (eccstrength == 16) {
+			err = omap_select_ecc_scheme(nand,
+					OMAP_ECC_BCH16_CODE_HW,
+					mtd->writesize, mtd->oobsize);
 		} else {
 			printf("nand: error: unsupported ECC scheme\n");
 			return -EINVAL;