diff options
| author |   Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-03-23 05:07:21 +0900 |
|---|---|---|
| committer |   Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-03-28 14:18:03 +0200 |
| commit | e93c1640e0387ab55b98b4e04600050f2beceac1 (patch) | |
| tree | 0cb1e85b5d2553f12ccb041d83771181c2241b1e /drivers/mtd/nand/denali.c | |
| parent | mtd: nand: denali: move multi device fixup code to a helper function (diff) | |
| download | linux-dev-e93c1640e0387ab55b98b4e04600050f2beceac1.tar.xz linux-dev-e93c1640e0387ab55b98b4e04600050f2beceac1.zip | |
mtd: nand: denali: simplify multi device fixup code
The available configuration of the IP bus width is x8 or x16, so the
possible value for denali->devnum is 1 or 2.
If the value is 1, there is nothing to do. Fixup parameters only
when denali->devnum is 2.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd/nand/denali.c')
| -rw-r--r-- | drivers/mtd/nand/denali.c | 46 |
1 files changed, 30 insertions, 16 deletions
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index 2b5edd39248b..e1c45bf2656d 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -1403,7 +1403,7 @@ static void denali_drv_init(struct denali_nand_info *denali) denali->irq_status = 0; } -static void denali_multidev_fixup(struct denali_nand_info *denali) +static int denali_multidev_fixup(struct denali_nand_info *denali) { struct nand_chip *chip = &denali->nand; struct mtd_info *mtd = nand_to_mtd(chip); @@ -1417,20 +1417,32 @@ static void denali_multidev_fixup(struct denali_nand_info *denali) */ denali->devnum = ioread32(denali->flash_reg + DEVICES_CONNECTED); - mtd->size <<= denali->devnum - 1; - mtd->erasesize <<= denali->devnum - 1; - mtd->writesize <<= denali->devnum - 1; - mtd->oobsize <<= denali->devnum - 1; - chip->chipsize <<= denali->devnum - 1; - chip->page_shift += denali->devnum - 1; - chip->phys_erase_shift += denali->devnum - 1; - chip->bbt_erase_shift += denali->devnum - 1; - chip->chip_shift += denali->devnum - 1; - chip->pagemask <<= denali->devnum - 1; - chip->ecc.size *= denali->devnum; - chip->ecc.bytes *= denali->devnum; - chip->ecc.strength *= denali->devnum; - denali->bbtskipbytes *= denali->devnum; + if (denali->devnum == 1) + return 0; + + if (denali->devnum != 2) { + dev_err(denali->dev, "unsupported number of devices %d\n", + denali->devnum); + return -EINVAL; + } + + /* 2 chips in parallel */ + mtd->size <<= 1; + mtd->erasesize <<= 1; + mtd->writesize <<= 1; + mtd->oobsize <<= 1; + chip->chipsize <<= 1; + chip->page_shift += 1; + chip->phys_erase_shift += 1; + chip->bbt_erase_shift += 1; + chip->chip_shift += 1; + chip->pagemask <<= 1; + chip->ecc.size <<= 1; + chip->ecc.bytes <<= 1; + chip->ecc.strength <<= 1; + denali->bbtskipbytes <<= 1; + + return 0; } int denali_init(struct denali_nand_info *denali) @@ -1568,7 +1580,9 @@ int denali_init(struct denali_nand_info *denali) chip->ecc.write_oob = denali_write_oob; chip->erase = denali_erase; - denali_multidev_fixup(denali); + ret = denali_multidev_fixup(denali); + if (ret) + goto failed_req_irq; ret = nand_scan_tail(mtd); if (ret) |