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Subject[PATCH v2 12/32] mtd: rawnand: lpc32xx_mlc: convert driver to nand_scan()
Date
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.raynal@bootlin.com>
---
drivers/mtd/nand/raw/lpc32xx_mlc.c | 105 +++++++++++++++++++------------------
1 file changed, 55 insertions(+), 50 deletions(-)

diff --git a/drivers/mtd/nand/raw/lpc32xx_mlc.c b/drivers/mtd/nand/raw/lpc32xx_mlc.c
index 052d123a8304..d650ed609ba7 100644
--- a/drivers/mtd/nand/raw/lpc32xx_mlc.c
+++ b/drivers/mtd/nand/raw/lpc32xx_mlc.c
@@ -184,6 +184,7 @@ static struct nand_bbt_descr lpc32xx_nand_bbt_mirror = {
};

struct lpc32xx_nand_host {
+ struct platform_device *pdev;
struct nand_chip nand_chip;
struct lpc32xx_mlc_platform_data *pdata;
struct clk *clk;
@@ -653,6 +654,53 @@ static struct lpc32xx_nand_cfg_mlc *lpc32xx_parse_dt(struct device *dev)
return ncfg;
}

+static int lpc32xx_nand_attach_chip(struct nand_chip *chip)
+{
+ struct mtd_info *mtd = nand_to_mtd(chip);
+ struct lpc32xx_nand_host *host = nand_get_controller_data(chip);
+ struct device *dev = &host->pdev->dev;
+
+ host->dma_buf = devm_kzalloc(dev, mtd->writesize, GFP_KERNEL);
+ if (!host->dma_buf)
+ return -ENOMEM;
+
+ host->dummy_buf = devm_kzalloc(dev, mtd->writesize, GFP_KERNEL);
+ if (!host->dummy_buf)
+ return -ENOMEM;
+
+ chip->ecc.mode = NAND_ECC_HW;
+ chip->ecc.size = 512;
+ mtd_set_ooblayout(mtd, &lpc32xx_ooblayout_ops);
+ host->mlcsubpages = mtd->writesize / 512;
+
+ /* initially clear interrupt status */
+ readb(MLC_IRQ_SR(host->io_base));
+
+ init_completion(&host->comp_nand);
+ init_completion(&host->comp_controller);
+
+ host->irq = platform_get_irq(host->pdev, 0);
+ if (host->irq < 0) {
+ dev_err(dev, "failed to get platform irq\n");
+ return -EINVAL;
+ }
+
+ if (request_irq(host->irq, (irq_handler_t)&lpc3xxx_nand_irq,
+ IRQF_TRIGGER_HIGH, DRV_NAME, host)) {
+ dev_err(dev, "Error requesting NAND IRQ\n");
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static void lpc32xx_nand_detach_chip(struct nand_chip *chip)
+{
+ struct lpc32xx_nand_host *host = nand_get_controller_data(chip);
+
+ free_irq(host->irq, host);
+}
+
/*
* Probe for NAND controller
*/
@@ -669,6 +717,8 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
if (!host)
return -ENOMEM;

+ host->pdev = pdev;
+
rc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
host->io_base = devm_ioremap_resource(&pdev->dev, rc);
if (IS_ERR(host->io_base))
@@ -749,58 +799,15 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
}

/*
- * Scan to find existance of the device and
- * Get the type of NAND device SMALL block or LARGE block
+ * Scan to find existence of the device and get the type of NAND device:
+ * SMALL block or LARGE block.
*/
- res = nand_scan_ident(mtd, 1, NULL);
+ nand_chip->hwcontrol.attach_chip = lpc32xx_nand_attach_chip;
+ nand_chip->hwcontrol.detach_chip = lpc32xx_nand_detach_chip;
+ res = nand_scan(mtd, 1);
if (res)
goto release_dma_chan;

- host->dma_buf = devm_kzalloc(&pdev->dev, mtd->writesize, GFP_KERNEL);
- if (!host->dma_buf) {
- res = -ENOMEM;
- goto release_dma_chan;
- }
-
- host->dummy_buf = devm_kzalloc(&pdev->dev, mtd->writesize, GFP_KERNEL);
- if (!host->dummy_buf) {
- res = -ENOMEM;
- goto release_dma_chan;
- }
-
- nand_chip->ecc.mode = NAND_ECC_HW;
- nand_chip->ecc.size = 512;
- mtd_set_ooblayout(mtd, &lpc32xx_ooblayout_ops);
- host->mlcsubpages = mtd->writesize / 512;
-
- /* initially clear interrupt status */
- readb(MLC_IRQ_SR(host->io_base));
-
- init_completion(&host->comp_nand);
- init_completion(&host->comp_controller);
-
- host->irq = platform_get_irq(pdev, 0);
- if (host->irq < 0) {
- dev_err(&pdev->dev, "failed to get platform irq\n");
- res = -EINVAL;
- goto release_dma_chan;
- }
-
- if (request_irq(host->irq, (irq_handler_t)&lpc3xxx_nand_irq,
- IRQF_TRIGGER_HIGH, DRV_NAME, host)) {
- dev_err(&pdev->dev, "Error requesting NAND IRQ\n");
- res = -ENXIO;
- goto release_dma_chan;
- }
-
- /*
- * Fills out all the uninitialized function pointers with the defaults
- * And scans for a bad block table if appropriate.
- */
- res = nand_scan_tail(mtd);
- if (res)
- goto free_irq;
-
mtd->name = DRV_NAME;

res = mtd_device_register(mtd, host->ncfg->parts,
@@ -812,8 +819,6 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)

cleanup_nand:
nand_cleanup(nand_chip);
-free_irq:
- free_irq(host->irq, host);
release_dma_chan:
if (use_dma)
dma_release_channel(host->dma_chan);
--
2.14.1
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