[U-Boot] [PATCH 1/4] mtd: nand: export nand_get_flash_type function

[Jörg Krause]

`nand_get_flash_type()` allows identification of supported NAND flashs.
The function is useful in SPL (like mxs_nand_spl.c) to lookup for a NAND
flash (which does not support ONFi) instead of using nand_simple.c and
hard-coding all required NAND parameters.

Signed-off-by: Jörg Krause <joerg.krause at embedded.rocks>
---
 drivers/mtd/nand/nand_base.c |  3 ++-
 include/linux/mtd/rawnand.h  | 10 +++++++---
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index eb9f121f81..64e4621aaa 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3755,7 +3755,7 @@ static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip,
 /*
  * Get the flash and manufacturer id and lookup if the type is supported.
  */
-static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
+struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 						  struct nand_chip *chip,
 						  int *maf_id, int *dev_id,
 						  struct nand_flash_dev *type)
@@ -3927,6 +3927,7 @@ ident_done:
 		mtd->erasesize >> 10, mtd->writesize, mtd->oobsize);
 	return type;
 }
+EXPORT_SYMBOL(nand_get_flash_type);
 
 #if CONFIG_IS_ENABLED(OF_CONTROL)
 DECLARE_GLOBAL_DATA_PTR;
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 6c3e838d80..3871379fb1 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -23,9 +23,16 @@
 #include <asm/cache.h>
 
 struct mtd_info;
+struct nand_chip;
 struct nand_flash_dev;
 struct device_node;
 
+/* Get the flash and manufacturer id and lookup if the type is supported. */
+struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
+					   struct nand_chip *chip,
+					   int *maf_id, int *dev_id,
+					   struct nand_flash_dev *type);
+
 /* Scan and identify a NAND device */
 int nand_scan(struct mtd_info *mtd, int max_chips);
 /*
@@ -248,9 +255,6 @@ typedef enum {
 #define NAND_CI_CELLTYPE_MSK	0x0C
 #define NAND_CI_CELLTYPE_SHIFT	2
 
-/* Keep gcc happy */
-struct nand_chip;
-
 /* ONFI features */
 #define ONFI_FEATURE_16_BIT_BUS		(1 << 0)
 #define ONFI_FEATURE_EXT_PARAM_PAGE	(1 << 7)
-- 
2.15.1