diff mbox series

[2/3] mtd: rawnand: NAND controller write protect

Message ID trinity-a3c12bff-7281-45c4-a849-bd5ffbfcf2b4-1696906059694@3c-app-mailcom-lxa01
State New
Headers show
Series [1/3] mtd: rawnand: Add destructive operation | expand

Commit Message

david regan Oct. 10, 2023, 2:47 a.m. UTC 
Allow NAND controller to be responsible for write protect pin
handling during fast path and exec_op destructive operation
when controller_wp flag is set.

Signed-off-by: David Regan <dregan@mail.com>

---
 drivers/mtd/nand/raw/nand_base.c | 4 ++++
 include/linux/mtd/rawnand.h      | 2 ++
 2 files changed, 6 insertions(+)

--
2.37.3
diff mbox series

Patch

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 47cc2c35153b..38ed0ced5b8e 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -367,6 +367,10 @@  static int nand_check_wp(struct nand_chip *chip)
 	if (chip->options & NAND_BROKEN_XD)
 		return 0;

+	/* controller responsible for NAND write protect */
+	if (chip->controller->controller_wp)
+		return 0;
+
 	/* Check the WP bit */
 	ret = nand_status_op(chip, &status);
 	if (ret)
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 31aceda8616c..f03b9d7f48b8 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1111,6 +1111,7 @@  struct nand_controller_ops {
  *			the bus without restarting an entire read operation nor
  *			changing the column.
  * @supported_op.cont_read: The controller supports sequential cache reads.
+ * @controller_wp:	controller responsible for NAND write protect.
  */
 struct nand_controller {
 	struct mutex lock;
@@ -1119,6 +1120,7 @@  struct nand_controller {
 		unsigned int data_only_read: 1;
 		unsigned int cont_read: 1;
 	} supported_op;
+	bool controller_wp;
 };

 static inline void nand_controller_init(struct nand_controller *nfc)