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Commit 5b40db68 authored by Huang Shijie's avatar Huang Shijie Committed by David Woodhouse
Browse files

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



add a helper to get the supported features for ONFI nand.
Also add the neccessary macros.

Signed-off-by: default avatarHuang Shijie <b32955@freescale.com>
Reviewed-and-tested-by: default avatarBrian Norris <computersforpeace@gmail.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 5138a98f

include/linux/mtd/nand.h

+10 −0
Original line number Diff line number Diff line
@@ -202,6 +202,10 @@ typedef enum { 
/* Keep gcc happy */

struct nand_chip;



/* ONFI features */

#define ONFI_FEATURE_16_BIT_BUS		(1 << 0)

#define ONFI_FEATURE_EXT_PARAM_PAGE	(1 << 7)



/* ONFI timing mode, used in both asynchronous and synchronous mode */

#define ONFI_TIMING_MODE_0		(1 << 0)

#define ONFI_TIMING_MODE_1		(1 << 1)
@@ -756,6 +760,12 @@ struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd) 
	return chip->priv;

}



/* return the supported features. */

static inline int onfi_feature(struct nand_chip *chip)

{

	return chip->onfi_version ? le16_to_cpu(chip->onfi_params.features) : 0;

}



/* return the supported asynchronous timing mode. */

static inline int onfi_get_async_timing_mode(struct nand_chip *chip)

{