mtd: nand: define struct nand_timings
Ported from Linux commit bb5fd0b6da: | Define a struct containing the standard NAND timings as described in NAND | datasheets. | | Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> | Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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@ -742,4 +742,53 @@ static inline bool nand_is_slc(struct nand_chip *chip)
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return chip->bits_per_cell == 1;
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}
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/**
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* struct nand_sdr_timings - SDR NAND chip timings
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*
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* This struct defines the timing requirements of a SDR NAND chip.
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* These informations can be found in every NAND datasheets and the timings
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* meaning are described in the ONFI specifications:
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* www.onfi.org/~/media/ONFI/specs/onfi_3_1_spec.pdf (chapter 4.15 Timing
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* Parameters)
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*
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* All these timings are expressed in picoseconds.
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*/
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struct nand_sdr_timings {
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u32 tALH_min;
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u32 tADL_min;
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u32 tALS_min;
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u32 tAR_min;
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u32 tCEA_max;
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u32 tCEH_min;
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u32 tCH_min;
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u32 tCHZ_max;
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u32 tCLH_min;
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u32 tCLR_min;
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u32 tCLS_min;
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u32 tCOH_min;
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u32 tCS_min;
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u32 tDH_min;
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u32 tDS_min;
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u32 tFEAT_max;
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u32 tIR_min;
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u32 tITC_max;
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u32 tRC_min;
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u32 tREA_max;
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u32 tREH_min;
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u32 tRHOH_min;
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u32 tRHW_min;
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u32 tRHZ_max;
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u32 tRLOH_min;
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u32 tRP_min;
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u32 tRR_min;
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u64 tRST_max;
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u32 tWB_max;
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u32 tWC_min;
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u32 tWH_min;
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u32 tWHR_min;
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u32 tWP_min;
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u32 tWW_min;
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};
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#endif /* __LINUX_MTD_NAND_H */
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