diff options
Diffstat (limited to 'drivers/mtd/devices/elm.c')
| -rw-r--r-- | drivers/mtd/devices/elm.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/mtd/devices/elm.c b/drivers/mtd/devices/elm.c index f160d2c6cd59..c51752ad072e 100644 --- a/drivers/mtd/devices/elm.c +++ b/drivers/mtd/devices/elm.c @@ -103,7 +103,8 @@ static u32 elm_read_reg(struct elm_info *info, int offset) * @dev: ELM device * @bch_type: Type of BCH ecc */ -int elm_config(struct device *dev, enum bch_ecc bch_type) +int elm_config(struct device *dev, enum bch_ecc bch_type, + int ecc_steps, int ecc_step_size, int ecc_syndrome_size) { u32 reg_val; struct elm_info *info = dev_get_drvdata(dev); @@ -112,6 +113,16 @@ int elm_config(struct device *dev, enum bch_ecc bch_type) dev_err(dev, "Unable to configure elm - device not probed?\n"); return -ENODEV; } + /* ELM cannot detect ECC errors for chunks > 1KB */ + if (ecc_step_size > ((ELM_ECC_SIZE + 1) / 2)) { + dev_err(dev, "unsupported config ecc-size=%d\n", ecc_step_size); + return -EINVAL; + } + /* ELM support 8 error syndrome process */ + if (ecc_steps > ERROR_VECTOR_MAX) { + dev_err(dev, "unsupported config ecc-step=%d\n", ecc_steps); + return -EINVAL; + } reg_val = (bch_type & ECC_BCH_LEVEL_MASK) | (ELM_ECC_SIZE << 16); elm_write_reg(info, ELM_LOCATION_CONFIG, reg_val); |