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| author | Huang Shijie <b32955@freescale.com> | 2014-02-21 13:39:39 +0800 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-03-10 22:42:26 -0700 |
| commit | 7852f8962f0f022b11fc56d63de06226a9f70d88 (patch) | |
| tree | 75a481d0f1e396b7356becb5066646337d6b4058 | |
| parent | d94abba7605d3c15123eb3b331a1872ef17d29e0 (diff) | |
| download | op-kernel-dev-7852f8962f0f022b11fc56d63de06226a9f70d88.zip op-kernel-dev-7852f8962f0f022b11fc56d63de06226a9f70d88.tar.gz | |
mtd: nand: add a helper to get the supported features for JEDEC
Add a helper to get the supported features for JEDEC compliant NAND.
Also add a macro JEDEC_FEATURE_16_BIT_BUS.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
| -rw-r--r-- | include/linux/mtd/nand.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index f9af756..afd1cf9b 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -350,6 +350,9 @@ struct jedec_ecc_info { u8 reserved[2]; } __packed; +/* JEDEC features */ +#define JEDEC_FEATURE_16_BIT_BUS (1 << 0) + struct nand_jedec_params { /* rev info and features block */ /* 'J' 'E' 'S' 'D' */ @@ -925,4 +928,10 @@ static inline int nand_opcode_8bits(unsigned int command) return command == NAND_CMD_READID; } +/* return the supported JEDEC features. */ +static inline int jedec_feature(struct nand_chip *chip) +{ + return chip->jedec_version ? le16_to_cpu(chip->jedec_params.features) + : 0; +} #endif /* __LINUX_MTD_NAND_H */ |
