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mtd: rawnand: lpc32xx_mlc: convert driver to nand_scan()

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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>
This commit is contained in:
Miquel Raynal 2018-07-25 15:31:38 +02:00
parent 73a27db865
commit c49f3bee8c
1 changed files with 33 additions and 28 deletions
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61
drivers/mtd/nand/raw/lpc32xx_mlc.c
View File

@ -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 +654,32 @@ 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;
return 0;
}
static const struct nand_controller_ops lpc32xx_nand_controller_ops = {
.attach_chip = lpc32xx_nand_attach_chip,
};
/*
* Probe for NAND controller
*/
@ -669,6 +696,8 @@ 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))
@ -748,31 +777,6 @@ 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
*/
res = nand_scan_ident(mtd, 1, NULL);
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));
@ -794,10 +798,11 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
}
/*
* Fills out all the uninitialized function pointers with the defaults
* And scans for a bad block table if appropriate.
* Scan to find existence of the device and get the type of NAND device:
* SMALL block or LARGE block.
*/
res = nand_scan_tail(mtd);
nand_chip->dummy_controller.ops = &lpc32xx_nand_controller_ops;
res = nand_scan(mtd, 1);
if (res)
goto free_irq;