`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@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)