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author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-07-11 09:49:41 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-08-18 16:16:04 +0200 |
commit | bb25c7f528d34a086e6443cf7e876428c3a38f9a (patch) | |
tree | f9c8cbd37283022c2af7e5da6d01a4f9c4a1fa67 /include/linux | |
parent | eabab332838178044b98014b06d3195531eac95d (diff) | |
download | barebox-bb25c7f528d34a086e6443cf7e876428c3a38f9a.tar.gz barebox-bb25c7f528d34a086e6443cf7e876428c3a38f9a.tar.xz |
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>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/mtd/nand.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 76a6425be8..5c237f0bd2 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -742,4 +742,53 @@ static inline bool nand_is_slc(struct nand_chip *chip) return chip->bits_per_cell == 1; } +/** + * struct nand_sdr_timings - SDR NAND chip timings + * + * This struct defines the timing requirements of a SDR NAND chip. + * These informations can be found in every NAND datasheets and the timings + * meaning are described in the ONFI specifications: + * www.onfi.org/~/media/ONFI/specs/onfi_3_1_spec.pdf (chapter 4.15 Timing + * Parameters) + * + * All these timings are expressed in picoseconds. + */ + +struct nand_sdr_timings { + u32 tALH_min; + u32 tADL_min; + u32 tALS_min; + u32 tAR_min; + u32 tCEA_max; + u32 tCEH_min; + u32 tCH_min; + u32 tCHZ_max; + u32 tCLH_min; + u32 tCLR_min; + u32 tCLS_min; + u32 tCOH_min; + u32 tCS_min; + u32 tDH_min; + u32 tDS_min; + u32 tFEAT_max; + u32 tIR_min; + u32 tITC_max; + u32 tRC_min; + u32 tREA_max; + u32 tREH_min; + u32 tRHOH_min; + u32 tRHW_min; + u32 tRHZ_max; + u32 tRLOH_min; + u32 tRP_min; + u32 tRR_min; + u64 tRST_max; + u32 tWB_max; + u32 tWC_min; + u32 tWH_min; + u32 tWHR_min; + u32 tWP_min; + u32 tWW_min; +}; + #endif /* __LINUX_MTD_NAND_H */ |