diff options
| author | Ley Foon Tan | 2020-07-10 14:58:15 +0800 |
|---|---|---|
| committer | Masahiro Yamada | 2020-07-11 21:30:21 +0900 |
| commit | 94e8b328a75cb940efca80e76a31cfffe8e3799e (patch) | |
| tree | 7c46e00971274820b27d55556a83fd9a445f7654 /drivers/mtd/nand | |
| parent | 3e57f879eee61df88c17ca447f1a9f6d7e598cde (diff) | |
mtd: nand: raw: denali: Wait for reset completion status
Fixed delay 200us is not working in certain platforms. Change to
poll for reset completion status to have more reliable reset process.
Controller will set the rst_comp bit in intr_status register after
controller has completed its reset and initialization process.
Tested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Radu Bacrau <radu.bacrau@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/raw/denali.c | 11 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/denali.h | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/denali_dt.c | 6 |
3 files changed, 17 insertions, 1 deletions
diff --git a/drivers/mtd/nand/raw/denali.c b/drivers/mtd/nand/raw/denali.c index 15e90291de0..ab91db85467 100644 --- a/drivers/mtd/nand/raw/denali.c +++ b/drivers/mtd/nand/raw/denali.c @@ -1220,6 +1220,17 @@ static int denali_multidev_fixup(struct denali_nand_info *denali) return 0; } +int denali_wait_reset_complete(struct denali_nand_info *denali) +{ + u32 irq_status; + + irq_status = denali_wait_for_irq(denali, INTR__RST_COMP); + if (!(irq_status & INTR__RST_COMP)) + return -EIO; + + return 0; +} + int denali_init(struct denali_nand_info *denali) { struct nand_chip *chip = &denali->nand; diff --git a/drivers/mtd/nand/raw/denali.h b/drivers/mtd/nand/raw/denali.h index 019deda094e..6cd02b2e26e 100644 --- a/drivers/mtd/nand/raw/denali.h +++ b/drivers/mtd/nand/raw/denali.h @@ -321,6 +321,7 @@ struct denali_nand_info { #define DENALI_CAP_DMA_64BIT BIT(1) int denali_calc_ecc_bytes(int step_size, int strength); +int denali_wait_reset_complete(struct denali_nand_info *denali); int denali_init(struct denali_nand_info *denali); #endif /* __DENALI_H__ */ diff --git a/drivers/mtd/nand/raw/denali_dt.c b/drivers/mtd/nand/raw/denali_dt.c index 75ad15b0758..8318ff507f3 100644 --- a/drivers/mtd/nand/raw/denali_dt.c +++ b/drivers/mtd/nand/raw/denali_dt.c @@ -157,7 +157,11 @@ static int denali_dt_probe(struct udevice *dev) * kicked (bootstrap process). The driver must wait until it is * finished. Otherwise, it will result in unpredictable behavior. */ - udelay(200); + ret = denali_wait_reset_complete(denali); + if (ret) { + dev_err(denali->dev, "reset not completed.\n"); + return ret; + } } return denali_init(denali); |