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 <Takahiro.Kuwano@infineon.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
index 2b72d65..d953c7e 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.