[PATCH v8 11/15] mtd: spi-nor-core: Add the ->ready() hook
tkuw584924 at gmail.com
tkuw584924 at gmail.com
Mon May 3 23:42:34 CEST 2021
From: Takahiro Kuwano <Takahiro.Kuwano at infineon.com>
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 <Takahiro.Kuwano at infineon.com>
Reviewed-by: Pratyush Yadav <p.yadav at ti.com>
---
Changes in v8:
- No change
Changes in v7:
- No change
Changes in v6:
- Rebase and fix commit description
Changes in v5:
- Move spansion_sr_ready() to different patch
- Move original code in spi_nor_ready() to newly created
spi_nor_default_ready()
drivers/mtd/spi/spi-nor-core.c | 10 +++++++++-
include/linux/mtd/spi-nor.h | 2 ++
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
index ac8ebfc4f0..8a2c5d949a 100644
--- a/drivers/mtd/spi/spi-nor-core.c
+++ b/drivers/mtd/spi/spi-nor-core.c
@@ -567,7 +567,7 @@ 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;
@@ -580,6 +580,14 @@ 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 de4472da5c..2236e36e28 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -437,6 +437,7 @@ struct spi_flash {
* @flash_is_locked: [FLASH-SPECIFIC] check if a region of the SPI NOR is
* completely locked
* @quad_enable: [FLASH-SPECIFIC] enables SPI NOR quad mode
+ * @ready: [FLASH-SPECIFIC] check if the flash is ready
* @priv: the private data
*/
struct spi_nor {
@@ -482,6 +483,7 @@ struct spi_nor {
int (*flash_unlock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
int (*flash_is_locked)(struct spi_nor *nor, loff_t ofs, uint64_t len);
int (*quad_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 */
--
2.25.1
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