diff options
| author | Pekon Gupta <pekon@ti.com> | 2013-10-24 18:20:20 +0530 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2013-11-06 23:33:08 -0800 |
| commit | f18befb57b0779094ac7658fa7be5cf559da835f (patch) | |
| tree | fe73befc203731491a2ad549ec8763483e9bb10c /drivers/mtd | |
| parent | 633deb58e1ecc81486505fe9d3dc2aa3cfbca719 (diff) | |
| download | op-kernel-dev-f18befb57b0779094ac7658fa7be5cf559da835f.zip op-kernel-dev-f18befb57b0779094ac7658fa7be5cf559da835f.tar.gz | |
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>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/omap2.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index 5596368..f464321 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -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) { |
