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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: Huang Shijie <b32955@freescale.com>
Reviewed-and-tested-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Huang Shijie 2013-05-17 11:17:28 +08:00 committed by David Woodhouse
parent 5138a98f6f
commit 5b40db68cb
1 changed files with 10 additions and 0 deletions
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10
include/linux/mtd/nand.h
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@ -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)
{