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mtd: nand: omap: use DT specified bus-width only for scanning NAND device 

This patch:
- calls nand_scan_ident() using bus-width as passed by DT
- removes double calls to nand_scan_ident(), in case first call fails
  then omap_nand_probe just returns error.

Signed-off-by: Pekon Gupta <pekon@ti.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Pekon Gupta 2013-10-24 18:20:20 +05:30 committed by Brian Norris
parent 633deb58e1
commit f18befb57b
1 changed files with 9 additions and 12 deletions
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21
drivers/mtd/nand/omap2.c
View File

@ -1856,7 +1856,6 @@ static int omap_nand_probe(struct platform_device *pdev)
mtd->name = dev_name(&pdev->dev);
mtd->owner = THIS_MODULE;
nand_chip = &info->nand;
nand_chip->options = pdata->devsize;
nand_chip->options |= NAND_SKIP_BBTSCAN;
#ifdef CONFIG_MTD_NAND_OMAP_BCH
info->of_node = pdata->of_node;
@ -1904,6 +1903,15 @@ static int omap_nand_probe(struct platform_device *pdev)
nand_chip->chip_delay = 50;
}
/* scan NAND device connected to chip controller */
nand_chip->options |= pdata->devsize & NAND_BUSWIDTH_16;
if (nand_scan_ident(mtd, 1, NULL)) {
pr_err("nand device scan failed, may be bus-width mismatch\n");
err = -ENXIO;
goto out_release_mem_region;
}
/* re-populate low-level callbacks based on xfer modes */
switch (pdata->xfer_type) {
case NAND_OMAP_PREFETCH_POLLED:
nand_chip->read_buf = omap_read_buf_pref;
@ -2011,17 +2019,6 @@ static int omap_nand_probe(struct platform_device *pdev)
}
}
/* DIP switches on some boards change between 8 and 16 bit
* bus widths for flash. Try the other width if the first try fails.
*/
if (nand_scan_ident(mtd, 1, NULL)) {
nand_chip->options ^= NAND_BUSWIDTH_16;
if (nand_scan_ident(mtd, 1, NULL)) {
err = -ENXIO;
goto out_release_mem_region;
}
}
/* rom code layout */
if (pdata->ecc_opt == OMAP_ECC_HAM1_CODE_HW) {