diff mbox series

[v7,1/2] mtd: spinand: Add support for setting plane select bits

Message ID 20240909092643.2434479-2-linchengming884@gmail.com
State Accepted
Headers show
Series Add support for two-plane serial NAND flash | expand

Commit Message

Cheng Ming Lin Sept. 9, 2024, 9:26 a.m. UTC 
From: Cheng Ming Lin <chengminglin@mxic.com.tw>

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>
---
 drivers/mtd/nand/spi/core.c | 6 ++++++
 include/linux/mtd/spinand.h | 2 ++
 2 files changed, 8 insertions(+)

Comments

Miquel Raynal Sept. 9, 2024, 9:56 a.m. UTC | #1 
On Mon, 2024-09-09 at 09:26:42 UTC, Cheng Ming Lin wrote:
> From: Cheng Ming Lin <chengminglin@mxic.com.tw>
> 
> 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>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel
diff mbox series

Patch

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index b7518f0f7d71..5e40d6fd258f 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 228ffda8b50d..978c399b1784 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