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mtd: nand: add a helper to get the supported features for JEDEC

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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>
This commit is contained in:
Huang Shijie 2014-02-21 13:39:39 +08:00 • committed by Brian Norris
parent d94abba760
commit 7852f8962f
1 changed files with 9 additions and 0 deletions
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9
include/linux/mtd/nand.h
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@ -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 */