Two helpers have been added to the core to make ECC-related
configuration between the detection phase and the final NAND scan. Use
these hooks and convert the driver to just use nand_scan() instead of
both nand_scan_ident() and nand_scan_tail().
Signed-off-by: Miquel Raynal <miquel.ray...@bootlin.com>
---
drivers/mtd/nand/raw/jz4740_nand.c | 46 ++++++++++++++++++++++++--------------
1 file changed, 29 insertions(+), 17 deletions(-)
diff --git a/drivers/mtd/nand/raw/jz4740_nand.c
b/drivers/mtd/nand/raw/jz4740_nand.c
index 9bb8a89e09f9..72f5783a7da8 100644
--- a/drivers/mtd/nand/raw/jz4740_nand.c
+++ b/drivers/mtd/nand/raw/jz4740_nand.c
@@ -59,6 +59,7 @@
struct jz_nand {
struct nand_chip chip;
+ struct platform_device *pdev;
void __iomem *base;
struct resource *mem;
@@ -329,8 +330,8 @@ static int jz_nand_detect_bank(struct platform_device *pdev,
writel(ctrl, nand->base + JZ_REG_NAND_CTRL);
if (chipnr == 0) {
- /* Detect first chip. */
- ret = nand_scan_ident(mtd, 1, NULL);
+ /* Detect the first chip and register it */
+ ret = nand_scan(mtd, 1);
if (ret)
goto notfound_id;
@@ -367,6 +368,25 @@ static int jz_nand_detect_bank(struct platform_device
*pdev,
return ret;
}
+static int jz_nand_attach_chip(struct nand_chip *chip)
+{
+ struct mtd_info *mtd = nand_to_mtd(chip);
+ struct jz_nand *nand = mtd_to_jz_nand(mtd);
+ struct device *dev = mtd->dev.parent;
+ struct jz_nand_platform_data *pdata = dev_get_platdata(dev);
+
+ if (pdata && pdata->ident_callback) {
+ pdata->ident_callback(nand->pdev, mtd, &pdata->partitions,
+ &pdata->num_partitions);
+ }
+
+ return 0;
+}
+
+static struct nand_controller_ops jz_nand_controller_ops = {
+ .attach_chip = jz_nand_attach_chip,
+};
+
static int jz_nand_probe(struct platform_device *pdev)
{
int ret;
@@ -397,6 +417,7 @@ static int jz_nand_probe(struct platform_device *pdev)
mtd = nand_to_mtd(chip);
mtd->dev.parent = &pdev->dev;
mtd->name = "jz4740-nand";
+ nand->pdev = pdev;
chip->ecc.hwctl = jz_nand_hwctl;
chip->ecc.calculate = jz_nand_calculate_ecc_rs;
@@ -410,6 +431,7 @@ static int jz_nand_probe(struct platform_device *pdev)
chip->chip_delay = 50;
chip->cmd_ctrl = jz_nand_cmd_ctrl;
chip->select_chip = jz_nand_select_chip;
+ chip->dummy_controller.ops = &jz_nand_controller_ops;
if (nand->busy_gpio)
chip->dev_ready = jz_nand_dev_ready;
@@ -450,20 +472,10 @@ static int jz_nand_probe(struct platform_device *pdev)
else
nand->banks[chipnr] = 0;
}
+
if (chipnr == 0) {
dev_err(&pdev->dev, "No NAND chips found\n");
- goto err_iounmap_mmio;
- }
-
- if (pdata && pdata->ident_callback) {
- pdata->ident_callback(pdev, mtd, &pdata->partitions,
- &pdata->num_partitions);
- }
-
- ret = nand_scan_tail(mtd);
- if (ret) {
- dev_err(&pdev->dev, "Failed to scan NAND\n");
- goto err_unclaim_banks;
+ goto err_nand_release;
}
ret = mtd_device_register(mtd, pdata ? pdata->partitions : NULL,
@@ -471,15 +483,13 @@ static int jz_nand_probe(struct platform_device *pdev)
if (ret) {
dev_err(&pdev->dev, "Failed to add mtd device\n");
- goto err_nand_release;
+ goto err_unclaim_banks;
}
dev_info(&pdev->dev, "Successfully registered JZ4740 NAND driver\n");
return 0;
-err_nand_release:
- nand_release(mtd);
err_unclaim_banks:
while (chipnr--) {
unsigned char bank = nand->banks[chipnr];
@@ -487,6 +497,8 @@ static int jz_nand_probe(struct platform_device *pdev)
nand->bank_base[bank - 1]);
}
writel(0, nand->base + JZ_REG_NAND_CTRL);
+err_nand_release:
+ nand_release(mtd);
err_iounmap_mmio:
jz_nand_iounmap_resource(nand->mem, nand->base);
err_free:
--
2.14.1
