ar71xx: ar934x-nfc: allow ECC to be configured in software BCH mode

Some devices ship with NAND images that use BCH ECC. Let the driver know
about that ECC mode so that it can be selected by machine files.

Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46022 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ar71xx/files/drivers/mtd/nand/ar934x_nfc.c

@@ -1437,6 +1437,10 @@ ar934x_nfc_probe(struct platform_device *pdev)
 		nand->ecc.mode = NAND_ECC_SOFT;
 		break;
 
+	case AR934X_NFC_ECC_SOFT_BCH:
+		nand->ecc.mode = NAND_ECC_SOFT_BCH;
+		break;
+
 	case AR934X_NFC_ECC_HW:
 		ret = ar934x_nfc_setup_hwecc(nfc);
 		if (ret)

target/linux/ar71xx/files/include/linux/platform/ar934x_nfc.h

@@ -20,6 +20,7 @@ struct mtd_partition;
 enum ar934x_nfc_ecc_mode {
 	AR934X_NFC_ECC_SOFT = 0,
 	AR934X_NFC_ECC_HW,
+	AR934X_NFC_ECC_SOFT_BCH,
 };
 
 struct ar934x_nfc_platform_data {