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authorBoris Brezillon <bbrezillon@kernel.org>2023-11-24 17:24:35 -0800
committerMiquel Raynal <miquel.raynal@bootlin.com>2023-12-04 11:51:40 +0100
commit578dc962ff2000ba4bf52d50717aea0819615634 (patch)
tree8445dedcc25b047715785d967aa3660e8989f859 /include/linux/mtd
parent2082b6956ce95b66b03983f3059744f559493d98 (diff)
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mtd: rawnand: Add destructive operation
Erase and program operations need the write protect (wp) pin to be de-asserted to take effect. Add the concept of destructive operation and pass the information to exec_op() so controllers know when they should de-assert this pin without having to decode the command opcode. Signed-off-by: Boris Brezillon <bbrezillon@kernel.org> Signed-off-by: David Regan <dregan@broadcom.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20231125012438.15191-1-dregan@broadcom.com
Diffstat (limited to 'include/linux/mtd')
-rw-r--r--include/linux/mtd/rawnand.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index c29ace15a053..bd02aba5e6e3 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);