diff options
| author | Takahiro Kuwano <[email protected]> | 2021-06-29 15:01:00 +0900 |
|---|---|---|
| committer | Jagan Teki <[email protected]> | 2021-06-29 19:16:54 +0530 |
| commit | 24b1e2c690fb953a3a981a282e37de5a0f1a98b1 (patch) | |
| tree | c453da44e5d67ed2e62abeb5ee873e8f06bb31d5 | |
| parent | a4aa9b7522dc67745795c1e2a76115a616da00ea (diff) | |
mtd: spi-nor-core: Add the ->ready() hook
For dual/quad die package devices from Spansion/Cypress, the device's
status needs to be checked by reading status registers in all dies, by
using Read Any Register command. To support this, a Flash specific hook
that can overwrite the legacy status check is needed.
Signed-off-by: Takahiro Kuwano <[email protected]>
Reviewed-by: Pratyush Yadav <[email protected]>
Reviewed-by: Jagan Teki <[email protected]>
| -rw-r--r-- | drivers/mtd/spi/spi-nor-core.c | 10 | ||||
| -rw-r--r-- | include/linux/mtd/spi-nor.h | 2 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c index 2b72d65b0ab..d953c7e44fe 100644 --- a/drivers/mtd/spi/spi-nor-core.c +++ b/drivers/mtd/spi/spi-nor-core.c @@ -713,7 +713,7 @@ static int spi_nor_fsr_ready(struct spi_nor *nor) return fsr & FSR_READY; } -static int spi_nor_ready(struct spi_nor *nor) +static int spi_nor_default_ready(struct spi_nor *nor) { int sr, fsr; @@ -726,6 +726,14 @@ static int spi_nor_ready(struct spi_nor *nor) return sr && fsr; } +static int spi_nor_ready(struct spi_nor *nor) +{ + if (nor->ready) + return nor->ready(nor); + + return spi_nor_default_ready(nor); +} + /* * Service routine to read status register until ready, or timeout occurs. * Returns non-zero if error. diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index 81df05fe841..e579ff2c7e5 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -504,6 +504,7 @@ struct spi_flash { * completely locked * @quad_enable: [FLASH-SPECIFIC] enables SPI NOR quad mode * @octal_dtr_enable: [FLASH-SPECIFIC] enables SPI NOR octal DTR mode. + * @ready: [FLASH-SPECIFIC] check if the flash is ready * @priv: the private data */ struct spi_nor { @@ -552,6 +553,7 @@ struct spi_nor { int (*flash_is_locked)(struct spi_nor *nor, loff_t ofs, uint64_t len); int (*quad_enable)(struct spi_nor *nor); int (*octal_dtr_enable)(struct spi_nor *nor); + int (*ready)(struct spi_nor *nor); void *priv; /* Compatibility for spi_flash, remove once sf layer is merged with mtd */ |