[PATCH v2 3/5] mtd: spinand: make spinand_wait() global

[Martin Kurbanov]

Change the function spinand_wait() from static to global so that SPI
NAND flash drivers don't duplicate it.

Signed-off-by: Martin Kurbanov <mmkurbanov at salutedevices.com>
---
 drivers/mtd/nand/spi/core.c | 18 ++++++++++++++----
 include/linux/mtd/spinand.h |  3 +++
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 2cb825edd49d0..c3e3d1e9599f1 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -496,10 +496,20 @@ static int spinand_erase_op(struct spinand_device *spinand,
 	return spi_mem_exec_op(spinand->spimem, &op);
 }
 
-static int spinand_wait(struct spinand_device *spinand,
-			unsigned long initial_delay_us,
-			unsigned long poll_delay_us,
-			u8 *s)
+/**
+ * spinand_wait() - Poll memory device status
+ * @spinand: the spinand device
+ * @initial_delay_us: delay in us before starting to poll
+ * @poll_delay_us: time to sleep between reads in us
+ * @s: the pointer to variable to store the value of REG_STATUS
+ *
+ * This function polls a status register (REG_STATUS) and returns when
+ * the STATUS_READY bit is 0 or when the timeout has expired.
+ *
+ * Return: 0 on success, a negative error code otherwise.
+ */
+int spinand_wait(struct spinand_device *spinand, unsigned long initial_delay_us,
+		 unsigned long poll_delay_us, u8 *s)
 {
 	struct spi_mem_op op = SPINAND_GET_FEATURE_OP(REG_STATUS,
 						      spinand->scratchbuf);
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 8099f35f0e051..5768968933530 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -567,6 +567,9 @@ int spinand_match_and_init(struct spinand_device *spinand,
 int spinand_upd_cfg(struct spinand_device *spinand, u8 mask, u8 val);
 int spinand_select_target(struct spinand_device *spinand, unsigned int target);
 
+int spinand_wait(struct spinand_device *spinand, unsigned long initial_delay_us,
+		 unsigned long poll_delay_us, u8 *s);
+
 int spinand_read_page(struct spinand_device *spinand,
 		      const struct nand_page_io_req *req);
 
-- 
2.43.2