Merge tag 'spi-nor/for-6.4' into mtd/next

SPI NOR core changes:
* introduce Read While Write support for flashes featuring several banks
* set the 4-Byte Address Mode method based on SFDP data
* allow post_sfdp hook to return errors
* parse SCCR MC table and introduce support for multi-chip devices

SPI NOR manufacturer drivers changes:
* macronix: add support for mx25uw51245g with RWW
* spansion:
  - determine current address mode at runtime as it can be changed in a
    non-volatile way and differ from factory defaults or from what SFDP
    advertises.
  - enable JFFS2 write buffer mode for few ECC'd NOR flashes: S25FS256T,
    s25hx and s28hx
  - add support for s25hl02gt and s25hs02gt

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

1 files changed, 13 insertions, 6 deletions

diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index a3f8cdca90c8..cdcfe0fd2e7d 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -343,6 +343,12 @@ struct spi_nor_flash_parameter;
  * struct spi_nor - Structure for defining the SPI NOR layer
  * @mtd:		an mtd_info structure
  * @lock:		the lock for the read/write/erase/lock/unlock operations
+ * @rww:		Read-While-Write (RWW) sync lock
+ * @rww.wait:		wait queue for the RWW sync
+ * @rww.ongoing_io:	the bus is busy
+ * @rww.ongoing_rd:	a read is ongoing on the chip
+ * @rww.ongoing_pe:	a program/erase is ongoing on the chip
+ * @rww.used_banks:	bitmap of the banks in use
  * @dev:		pointer to an SPI device or an SPI NOR controller device
  * @spimem:		pointer to the SPI memory device
  * @bouncebuf:		bounce buffer used when the buffer passed by the MTD
@@ -376,6 +382,13 @@ struct spi_nor_flash_parameter;
 struct spi_nor {
 	struct mtd_info		mtd;
 	struct mutex		lock;
+	struct spi_nor_rww {
+		wait_queue_head_t wait;
+		bool		ongoing_io;
+		bool		ongoing_rd;
+		bool		ongoing_pe;
+		unsigned int	used_banks;
+	} rww;
 	struct device		*dev;
 	struct spi_mem		*spimem;
 	u8			*bouncebuf;
@@ -437,10 +450,4 @@ static inline struct device_node *spi_nor_get_flash_node(struct spi_nor *nor)
 int spi_nor_scan(struct spi_nor *nor, const char *name,
 		 const struct spi_nor_hwcaps *hwcaps);
 
-/**
- * spi_nor_restore_addr_mode() - restore the status of SPI NOR
- * @nor:	the spi_nor structure
- */
-void spi_nor_restore(struct spi_nor *nor);
-
 #endif