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author | Sascha Hauer <s.hauer@pengutronix.de> | 2016-09-15 10:32:48 +0200 |
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committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-09-23 09:35:16 +0200 |
commit | b88730ada99bfe243862add360720a3550b0edbf (patch) | |
tree | 1e5ce3a923eb949ee33f133c873008c69698ee6b /drivers/mtd/nand/nand_timings.c | |
parent | b1dd3ca203fccd111926c3f6ac59bf903ec62b05 (diff) | |
download | op-kernel-dev-b88730ada99bfe243862add360720a3550b0edbf.zip op-kernel-dev-b88730ada99bfe243862add360720a3550b0edbf.tar.gz |
mtd: nand: Add function to convert ONFI mode to data_interface
onfi_init_data_interface() initializes a data interface with
values from a given ONFI mode.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd/nand/nand_timings.c')
-rw-r--r-- | drivers/mtd/nand/nand_timings.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c index 878fe0d..7441d68 100644 --- a/drivers/mtd/nand/nand_timings.c +++ b/drivers/mtd/nand/nand_timings.c @@ -269,3 +269,32 @@ const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode) return &onfi_sdr_timings[mode].timings.sdr; } EXPORT_SYMBOL(onfi_async_timing_mode_to_sdr_timings); + +/** + * onfi_init_data_interface - [NAND Interface] Initialize a data interface from + * given ONFI mode + * @iface: The data interface to be initialized + * @mode: The ONFI timing mode + */ +int onfi_init_data_interface(struct nand_chip *chip, + struct nand_data_interface *iface, + enum nand_data_interface_type type, + int timing_mode) +{ + if (type != NAND_SDR_IFACE) + return -EINVAL; + + if (timing_mode < 0 || timing_mode >= ARRAY_SIZE(onfi_sdr_timings)) + return -EINVAL; + + *iface = onfi_sdr_timings[timing_mode]; + + /* + * TODO: initialize timings that cannot be deduced from timing mode: + * tR, tPROG, tCCS, ... + * These information are part of the ONFI parameter page. + */ + + return 0; +} +EXPORT_SYMBOL(onfi_init_data_interface); |