diff options
| author | Stefan Roese <sr@denx.de> | 2015-09-14 08:47:47 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-09-15 15:05:21 -0400 |
| commit | 62c390f8a3f0aabe61656d6996f1d49766de2c20 (patch) | |
| tree | d084c121f3a4995abdc2f8c3ba942eff35b8bf22 /drivers/mtd | |
| parent | 0226d8780b3886a4acdd2d4c9731419306d470f6 (diff) | |
mtd: nand: fsmc: Fixes and cleanup for fsmc_nand_switch_ecc()
This patch addresses some comments raised by Scott in the last versions.
Here the changes in detail:
- Removed __maybe_unused as its not needed
- Added check for strength == 4 and error out for the unsupported
ECC strength values
- Don't set .caclulate, .correct, and .bytes for NAND_ECC_SOFT_BCH as this
will be done in nand_scan_tail()
- Set .caclulate back to fsmc_read_hwecc() in the HW case
- Added comment that this function will only be called on SPEAr platforms,
not supporting the BCH8 HW ECC (FSMC_VER8)
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Tom Rini <trini@konsulko.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/fsmc_nand.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c index 0976a67ff8..e0e9e1ebd0 100644 --- a/drivers/mtd/nand/fsmc_nand.c +++ b/drivers/mtd/nand/fsmc_nand.c @@ -13,7 +13,6 @@ #include <asm/io.h> #include <linux/bitops.h> #include <linux/err.h> -#include <linux/mtd/nand_bch.h> #include <linux/mtd/nand_ecc.h> #include <linux/mtd/fsmc_nand.h> #include <asm/arch/hardware.h> @@ -398,12 +397,18 @@ static int fsmc_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, * @eccstrength - the number of bits that could be corrected * (1 - HW, 4 - SW BCH4) */ -int __maybe_unused fsmc_nand_switch_ecc(uint32_t eccstrength) +int fsmc_nand_switch_ecc(uint32_t eccstrength) { struct nand_chip *nand; struct mtd_info *mtd; int err; + /* + * This functions is only called on SPEAr600 platforms, supporting + * 1 bit HW ECC. The BCH8 HW ECC (FSMC_VER8) from the ST-Ericsson + * Nomadik SoC is currently supporting this fsmc_nand_switch_ecc() + * function, as it doesn't need to switch to a different ECC layout. + */ mtd = &nand_info[nand_curr_device]; nand = mtd->priv; @@ -413,14 +418,18 @@ int __maybe_unused fsmc_nand_switch_ecc(uint32_t eccstrength) nand->ecc.bytes = 3; nand->ecc.strength = 1; nand->ecc.layout = &fsmc_ecc1_layout; + nand->ecc.calculate = fsmc_read_hwecc; nand->ecc.correct = nand_correct_data; - } else { + } else if (eccstrength == 4) { + /* + * .calculate .correct and .bytes will be set in + * nand_scan_tail() + */ nand->ecc.mode = NAND_ECC_SOFT_BCH; - nand->ecc.calculate = nand_bch_calculate_ecc; - nand->ecc.correct = nand_bch_correct_data; - nand->ecc.bytes = 7; nand->ecc.strength = 4; nand->ecc.layout = NULL; + } else { + printf("Error: ECC strength %d not supported!\n", eccstrength); } /* Update NAND handling after ECC mode switch */ |