mtd: rawnand: vf610: convert driver to nand_scan()

Two helpers have been added to the core to do all kind of controller
side configuration/initialization between the detection phase and the
final NAND scan. Implement these hooks so that we can convert the driver
to just use nand_scan() instead of the nand_scan_ident() +
nand_scan_tail() pair.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>

drivers/mtd/nand/raw/vf610_nfc.c

@@ -747,6 +747,69 @@ static void vf610_nfc_init_controller(struct vf610_nfc *nfc)
 	}
 }
 
+static int vf610_nfc_attach_chip(struct nand_chip *chip)
+{
+	struct mtd_info *mtd = nand_to_mtd(chip);
+	struct vf610_nfc *nfc = mtd_to_nfc(mtd);
+
+	vf610_nfc_init_controller(nfc);
+
+	/* Bad block options. */
+	if (chip->bbt_options & NAND_BBT_USE_FLASH)
+		chip->bbt_options |= NAND_BBT_NO_OOB;
+
+	/* Single buffer only, max 256 OOB minus ECC status */
+	if (mtd->writesize + mtd->oobsize > PAGE_2K + OOB_MAX - 8) {
+		dev_err(nfc->dev, "Unsupported flash page size\n");
+		return -ENXIO;
+	}
+
+	if (chip->ecc.mode != NAND_ECC_HW)
+		return 0;
+
+	if (mtd->writesize != PAGE_2K && mtd->oobsize < 64) {
+		dev_err(nfc->dev, "Unsupported flash with hwecc\n");
+		return -ENXIO;
+	}
+
+	if (chip->ecc.size != mtd->writesize) {
+		dev_err(nfc->dev, "Step size needs to be page size\n");
+		return -ENXIO;
+	}
+
+	/* Only 64 byte ECC layouts known */
+	if (mtd->oobsize > 64)
+		mtd->oobsize = 64;
+
+	/* Use default large page ECC layout defined in NAND core */
+	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
+	if (chip->ecc.strength == 32) {
+		nfc->ecc_mode = ECC_60_BYTE;
+		chip->ecc.bytes = 60;
+	} else if (chip->ecc.strength == 24) {
+		nfc->ecc_mode = ECC_45_BYTE;
+		chip->ecc.bytes = 45;
+	} else {
+		dev_err(nfc->dev, "Unsupported ECC strength\n");
+		return -ENXIO;
+	}
+
+	chip->ecc.read_page = vf610_nfc_read_page;
+	chip->ecc.write_page = vf610_nfc_write_page;
+	chip->ecc.read_page_raw = vf610_nfc_read_page_raw;
+	chip->ecc.write_page_raw = vf610_nfc_write_page_raw;
+	chip->ecc.read_oob = vf610_nfc_read_oob;
+	chip->ecc.write_oob = vf610_nfc_write_oob;
+
+	chip->ecc.size = PAGE_2K;
+
+	return 0;
+}
+
+static const struct nand_controller_ops vf610_nfc_controller_ops = {
+	.attach_chip = vf610_nfc_attach_chip,
+};
+
 static int vf610_nfc_probe(struct platform_device *pdev)
 {
 	struct vf610_nfc *nfc;
@@ -827,67 +890,9 @@ static int vf610_nfc_probe(struct platform_device *pdev)
 
 	vf610_nfc_preinit_controller(nfc);
 
-	/* first scan to find the device and get the page size */
-	err = nand_scan_ident(mtd, 1, NULL);
-	if (err)
-		goto err_disable_clk;
-
-	vf610_nfc_init_controller(nfc);
-
-	/* Bad block options. */
-	if (chip->bbt_options & NAND_BBT_USE_FLASH)
-		chip->bbt_options |= NAND_BBT_NO_OOB;
-
-	/* Single buffer only, max 256 OOB minus ECC status */
-	if (mtd->writesize + mtd->oobsize > PAGE_2K + OOB_MAX - 8) {
-		dev_err(nfc->dev, "Unsupported flash page size\n");
-		err = -ENXIO;
-		goto err_disable_clk;
-	}
-
-	if (chip->ecc.mode == NAND_ECC_HW) {
-		if (mtd->writesize != PAGE_2K && mtd->oobsize < 64) {
-			dev_err(nfc->dev, "Unsupported flash with hwecc\n");
-			err = -ENXIO;
-			goto err_disable_clk;
-		}
-
-		if (chip->ecc.size != mtd->writesize) {
-			dev_err(nfc->dev, "Step size needs to be page size\n");
-			err = -ENXIO;
-			goto err_disable_clk;
-		}
-
-		/* Only 64 byte ECC layouts known */
-		if (mtd->oobsize > 64)
-			mtd->oobsize = 64;
-
-		/* Use default large page ECC layout defined in NAND core */
-		mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
-		if (chip->ecc.strength == 32) {
-			nfc->ecc_mode = ECC_60_BYTE;
-			chip->ecc.bytes = 60;
-		} else if (chip->ecc.strength == 24) {
-			nfc->ecc_mode = ECC_45_BYTE;
-			chip->ecc.bytes = 45;
-		} else {
-			dev_err(nfc->dev, "Unsupported ECC strength\n");
-			err = -ENXIO;
-			goto err_disable_clk;
-		}
-
-		chip->ecc.read_page = vf610_nfc_read_page;
-		chip->ecc.write_page = vf610_nfc_write_page;
-		chip->ecc.read_page_raw = vf610_nfc_read_page_raw;
-		chip->ecc.write_page_raw = vf610_nfc_write_page_raw;
-		chip->ecc.read_oob = vf610_nfc_read_oob;
-		chip->ecc.write_oob = vf610_nfc_write_oob;
-
-		chip->ecc.size = PAGE_2K;
-	}
-
-	/* second phase scan */
-	err = nand_scan_tail(mtd);
+	/* Scan the NAND chip */
+	chip->dummy_controller.ops = &vf610_nfc_controller_ops;
+	err = nand_scan(mtd, 1);
 	if (err)
 		goto err_disable_clk;