mtd: nand: jz4780: switch to mtd_ooblayout_ops

Implementing the mtd_ooblayout_ops interface is the new way of exposing
ECC/OOB layout to MTD users.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: NHarvey Hunt <harvey.hunt@imgtec.com>

drivers/mtd/nand/jz4780_nand.c

@@ -55,8 +55,6 @@ struct jz4780_nand_chip {
 	struct nand_chip chip;
 	struct list_head chip_list;
 
-	struct nand_ecclayout ecclayout;
-
 	struct gpio_desc *busy_gpio;
 	struct gpio_desc *wp_gpio;
 	unsigned int reading: 1;
@@ -164,8 +162,7 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
 	struct nand_chip *chip = &nand->chip;
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct jz4780_nand_controller *nfc = to_jz4780_nand_controller(chip->controller);
-	struct nand_ecclayout *layout = &nand->ecclayout;
-	u32 start, i;
+	int eccbytes;
 
 	chip->ecc.bytes = fls((1 + 8) * chip->ecc.size)	*
 				(chip->ecc.strength / 8);
@@ -200,23 +197,17 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
 		return 0;
 
 	/* Generate ECC layout. ECC codes are right aligned in the OOB area. */
-	layout->eccbytes = mtd->writesize / chip->ecc.size * chip->ecc.bytes;
+	eccbytes = mtd->writesize / chip->ecc.size * chip->ecc.bytes;
 
-	if (layout->eccbytes > mtd->oobsize - 2) {
+	if (eccbytes > mtd->oobsize - 2) {
 		dev_err(dev,
 			"invalid ECC config: required %d ECC bytes, but only %d are available",
-			layout->eccbytes, mtd->oobsize - 2);
+			eccbytes, mtd->oobsize - 2);
 		return -EINVAL;
 	}
 
-	start = mtd->oobsize - layout->eccbytes;
-	for (i = 0; i < layout->eccbytes; i++)
-		layout->eccpos[i] = start + i;
-
-	layout->oobfree[0].offset = 2;
-	layout->oobfree[0].length = mtd->oobsize - layout->eccbytes - 2;
+	mtd->ooblayout = &nand_ooblayout_lp_ops;
 
-	chip->ecc.layout = layout;
 	return 0;
 }