Merge tag 'mtd/for-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux

Pull mtd updates from Miquel Raynal:
 "MTD:

   - Apart from preventing the mtdblk to run on top of ftl or ubiblk
     (which may cause security issues and has no meaning anyway), there
     are a few misc fixes.

  Raw NAND:

   - Two meaningful changes this time. The conversion of the brcmnand
     driver to the ->exec_op() API, this series brought additional
     changes to the core in order to help controller drivers to handle
     themselves the WP pin during destructive operations when relevant.

   - There is also a series bringing important fixes to the sequential
     read feature.

   - As always, there is as well a whole bunch of miscellaneous W=1
     fixes, together with a few runtime fixes (double free, timeout
     value, OOB layout, missing register initialization) and the usual
     load of remove callbacks turned into void (which led to switch the
     txx9ndfmc driver to use module_platform_driver()).

  SPI NOR:

   - SPI NOR comes with die erase support for multi die flashes, with
     new octal protocols (1-1-8 and 1-8-8) parsed from SFDP and with an
     updated documentation about what the contributors shall consider
     when proposing flash additions or updates.

   - Michael Walle stepped out from the reviewer role to maintainer"

* tag 'mtd/for-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (39 commits)
  mtd: rawnand: Clarify conditions to enable continuous reads
  mtd: rawnand: Prevent sequential reads with on-die ECC engines
  mtd: rawnand: Fix core interference with sequential reads
  mtd: rawnand: Prevent crossing LUN boundaries during sequential reads
  mtd: Fix gluebi NULL pointer dereference caused by ftl notifier
  dt-bindings: mtd: partitions: u-boot: Fix typo
  mtd: rawnand: s3c2410: fix Excess struct member description kernel-doc warnings
  MAINTAINERS: change my mail to the kernel.org one
  mtd: spi-nor: sfdp: get the 1-1-8 and 1-8-8 protocol from SFDP
  mtd: spi-nor: drop superfluous debug prints
  mtd: spi-nor: sysfs: hide the flash name if not set
  mtd: spi-nor: mark the flash name as obsolete
  mtd: spi-nor: print flash ID instead of name
  mtd: maps: vmu-flash: Fix the (mtd core) switch to ref counters
  mtd: ssfdc: Remove an unused variable
  mtd: rawnand: diskonchip: fix a potential double free in doc_probe
  mtd: rawnand: rockchip: Add missing title to a kernel doc comment
  mtd: rawnand: rockchip: Rename a structure
  mtd: rawnand: pl353: Fix kernel doc
  mtd: spi-nor: micron-st: Add support for mt25qu01g
  ...

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index c29ace15a053..e84522e31301 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1003,6 +1003,8 @@ struct nand_op_parser {
 /**
  * struct nand_operation - NAND operation descriptor
  * @cs: the CS line to select for this NAND operation
+ * @deassert_wp: set to true when the operation requires the WP pin to be
+ *		 de-asserted (ERASE, PROG, ...)
  * @instrs: array of instructions to execute
  * @ninstrs: length of the @instrs array
  *
@@ -1010,6 +1012,7 @@ struct nand_op_parser {
  */
 struct nand_operation {
 	unsigned int cs;
+	bool deassert_wp;
 	const struct nand_op_instr *instrs;
 	unsigned int ninstrs;
 };
@@ -1021,6 +1024,14 @@ struct nand_operation {
 		.ninstrs = ARRAY_SIZE(_instrs),			\
 	}
 
+#define NAND_DESTRUCTIVE_OPERATION(_cs, _instrs)		\
+	{							\
+		.cs = _cs,					\
+		.deassert_wp = true,				\
+		.instrs = _instrs,				\
+		.ninstrs = ARRAY_SIZE(_instrs),			\
+	}
+
 int nand_op_parser_exec_op(struct nand_chip *chip,
 			   const struct nand_op_parser *parser,
 			   const struct nand_operation *op, bool check_only);
@@ -1104,6 +1115,7 @@ 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:	the controller is in charge of handling the WP pin.
  */
 struct nand_controller {
 	struct mutex lock;
@@ -1112,6 +1124,7 @@ 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)
@@ -1265,6 +1278,7 @@ struct nand_secure_region {
  * @cont_read: Sequential page read internals
  * @cont_read.ongoing: Whether a continuous read is ongoing or not
  * @cont_read.first_page: Start of the continuous read operation
+ * @cont_read.pause_page: End of the current sequential cache read operation
  * @cont_read.last_page: End of the continuous read operation
  * @controller: The hardware controller	structure which is shared among multiple
  *              independent devices
@@ -1321,6 +1335,7 @@ struct nand_chip {
 	struct {
 		bool ongoing;
 		unsigned int first_page;
+		unsigned int pause_page;
 		unsigned int last_page;
 	} cont_read;