Commit 7852f896 authored by Huang Shijie's avatar Huang Shijie Committed by Brian Norris
Browse files

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: default avatarHuang Shijie <b32955@freescale.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent d94abba7

include/linux/mtd/nand.h

+9 −0
Original line number Diff line number Diff line
@@ -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 */