diff options
| author |   Sascha Hauer <s.hauer@pengutronix.de> | 2016-09-15 10:32:48 +0200 |
|---|---|---|
| committer |   Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-09-23 09:35:16 +0200 |
| commit | b88730ada99bfe243862add360720a3550b0edbf (patch) | |
| tree | 1e5ce3a923eb949ee33f133c873008c69698ee6b | |
| parent | mtd: nand: convert ONFI mode into data interface (diff) | |
| download | linux-dev-b88730ada99bfe243862add360720a3550b0edbf.tar.xz linux-dev-b88730ada99bfe243862add360720a3550b0edbf.zip | |
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>
| -rw-r--r-- | drivers/mtd/nand/nand_timings.c | 29 | ||||
| -rw-r--r-- | include/linux/mtd/nand.h | 5 |
2 files changed, 34 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c index 878fe0d5342c..7441d68b78d5 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); diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index a625e960c0c3..1f34c04fe16c 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -1112,6 +1112,11 @@ static inline int onfi_get_sync_timing_mode(struct nand_chip *chip) return le16_to_cpu(chip->onfi_params.src_sync_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); + /* * Check if it is a SLC nand. * The !nand_is_slc() can be used to check the MLC/TLC nand chips. |