mtd: rawnand: jz4780: 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>
Acked-by: Harvey Hunt <harveyhuntnexus@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>

diff --git a/drivers/mtd/nand/raw/jz4780_nand.c b/drivers/mtd/nand/raw/jz4780_nand.c
index 49841dad347cc82ac6fe3a82b84e6d8feda1cce7..db4fa60bd52acaf5f056e27dcec2803431ad5414 100644 (file)
--- a/drivers/mtd/nand/raw/jz4780_nand.c
+++ b/drivers/mtd/nand/raw/jz4780_nand.c
@@ -158,9 +158,8 @@ static int jz4780_nand_ecc_correct(struct mtd_info *mtd, u8 *dat,
        return jz4780_bch_correct(nfc->bch, &params, dat, read_ecc);
 }
 
-static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *dev)
+static int jz4780_nand_attach_chip(struct nand_chip *chip)
 {
-       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);
        int eccbytes;
@@ -171,7 +170,8 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
        switch (chip->ecc.mode) {
        case NAND_ECC_HW:
                if (!nfc->bch) {
-                       dev_err(dev, "HW BCH selected, but BCH controller not found\n");
+                       dev_err(nfc->dev,
+                               "HW BCH selected, but BCH controller not found\n");
                        return -ENODEV;
                }
 
@@ -180,15 +180,16 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
                chip->ecc.correct = jz4780_nand_ecc_correct;
                /* fall through */
        case NAND_ECC_SOFT:
-               dev_info(dev, "using %s (strength %d, size %d, bytes %d)\n",
-                       (nfc->bch) ? "hardware BCH" : "software ECC",
-                       chip->ecc.strength, chip->ecc.size, chip->ecc.bytes);
+               dev_info(nfc->dev, "using %s (strength %d, size %d, bytes %d)\n",
+                        (nfc->bch) ? "hardware BCH" : "software ECC",
+                        chip->ecc.strength, chip->ecc.size, chip->ecc.bytes);
                break;
        case NAND_ECC_NONE:
-               dev_info(dev, "not using ECC\n");
+               dev_info(nfc->dev, "not using ECC\n");
                break;
        default:
-               dev_err(dev, "ECC mode %d not supported\n", chip->ecc.mode);
+               dev_err(nfc->dev, "ECC mode %d not supported\n",
+                       chip->ecc.mode);
                return -EINVAL;
        }
 
@@ -200,7 +201,7 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
        eccbytes = mtd->writesize / chip->ecc.size * chip->ecc.bytes;
 
        if (eccbytes > mtd->oobsize - 2) {
-               dev_err(dev,
+               dev_err(nfc->dev,
                        "invalid ECC config: required %d ECC bytes, but only %d are available",
                        eccbytes, mtd->oobsize - 2);
                return -EINVAL;
@@ -211,6 +212,10 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
        return 0;
 }
 
+static const struct nand_controller_ops jz4780_nand_controller_ops = {
+       .attach_chip = jz4780_nand_attach_chip,
+};
+
 static int jz4780_nand_init_chip(struct platform_device *pdev,
                                struct jz4780_nand_controller *nfc,
                                struct device_node *np,
@@ -280,15 +285,8 @@ static int jz4780_nand_init_chip(struct platform_device *pdev,
        chip->controller = &nfc->controller;
        nand_set_flash_node(chip, np);
 
-       ret = nand_scan_ident(mtd, 1, NULL);
-       if (ret)
-               return ret;
-
-       ret = jz4780_nand_init_ecc(nand, dev);
-       if (ret)
-               return ret;
-
-       ret = nand_scan_tail(mtd);
+       chip->controller->ops = &jz4780_nand_controller_ops;
+       ret = nand_scan(mtd, 1);
        if (ret)
                return ret;