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| author | Cheng Ming Lin <chengminglin@mxic.com.tw> | 2024-09-09 17:26:42 +0800 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2024-09-09 11:52:06 +0200 |
| commit | ca229bdbef29be207c8666f106acc3bf50736c05 (patch) | |
| tree | 2398548ac3c8dca7b25a8c157d1bd68b69ea652b | |
| parent | d53c35931b95b707df3b6cff061ff975843837d5 (diff) | |
| download | lwn-ca229bdbef29be207c8666f106acc3bf50736c05.tar.gz lwn-ca229bdbef29be207c8666f106acc3bf50736c05.zip | |
mtd: spinand: Add support for setting plane select bits
Add two flags for inserting the Plane Select bit into the column
address during the write_to_cache and the read_from_cache operation.
Add the SPINAND_HAS_PROG_PLANE_SELECT_BIT flag for serial NAND flash
that require inserting the Plane Select bit into the column address
during the write_to_cache operation.
Add the SPINAND_HAS_READ_PLANE_SELECT_BIT flag for serial NAND flash
that require inserting the Plane Select bit into the column address
during the read_from_cache operation.
Signed-off-by: Cheng Ming Lin <chengminglin@mxic.com.tw>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20240909092643.2434479-2-linchengming884@gmail.com
| -rw-r--r-- | drivers/mtd/nand/spi/core.c | 6 | ||||
| -rw-r--r-- | include/linux/mtd/spinand.h | 2 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index b5c6d755ade1..4d76f9f71a0e 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -408,6 +408,9 @@ static int spinand_read_from_cache_op(struct spinand_device *spinand, else rdesc = spinand->dirmaps[req->pos.plane].rdesc_ecc; + if (spinand->flags & SPINAND_HAS_READ_PLANE_SELECT_BIT) + column |= req->pos.plane << fls(nanddev_page_size(nand)); + while (nbytes) { ret = spi_mem_dirmap_read(rdesc, column, nbytes, buf); if (ret < 0) @@ -489,6 +492,9 @@ static int spinand_write_to_cache_op(struct spinand_device *spinand, else wdesc = spinand->dirmaps[req->pos.plane].wdesc_ecc; + if (spinand->flags & SPINAND_HAS_PROG_PLANE_SELECT_BIT) + column |= req->pos.plane << fls(nanddev_page_size(nand)); + while (nbytes) { ret = spi_mem_dirmap_write(wdesc, column, nbytes, buf); if (ret < 0) diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h index 8dbf67ca710a..702e5fb13dae 100644 --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -312,6 +312,8 @@ struct spinand_ecc_info { #define SPINAND_HAS_QE_BIT BIT(0) #define SPINAND_HAS_CR_FEAT_BIT BIT(1) +#define SPINAND_HAS_PROG_PLANE_SELECT_BIT BIT(2) +#define SPINAND_HAS_READ_PLANE_SELECT_BIT BIT(3) /** * struct spinand_ondie_ecc_conf - private SPI-NAND on-die ECC engine structure |