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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>
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@ -202,6 +202,10 @@ typedef enum {
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/* Keep gcc happy */
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struct nand_chip;
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/* ONFI features */
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#define ONFI_FEATURE_16_BIT_BUS (1 << 0)
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#define ONFI_FEATURE_EXT_PARAM_PAGE (1 << 7)
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/* ONFI timing mode, used in both asynchronous and synchronous mode */
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#define ONFI_TIMING_MODE_0 (1 << 0)
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#define ONFI_TIMING_MODE_1 (1 << 1)
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@ -756,6 +760,12 @@ struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
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return chip->priv;
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}
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/* return the supported features. */
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static inline int onfi_feature(struct nand_chip *chip)
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{
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return chip->onfi_version ? le16_to_cpu(chip->onfi_params.features) : 0;
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}
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/* return the supported asynchronous timing mode. */
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static inline int onfi_get_async_timing_mode(struct nand_chip *chip)
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{
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