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mtd: nand: Expose data interface for ONFI mode 0

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The nand layer will need ONFI mode 0 to use it as timing mode
before and right after reset.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[Linux commit: 6e1f9708dbf3c50a8da93c1952a01a7a2acb5e66]
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Sascha Hauer 2017-11-22 02:38:18 +09:00 committed by Masahiro Yamada
parent 46deff57da
commit b893e83330
2 changed files with 13 additions and 0 deletions
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11
drivers/mtd/nand/nand_timings.c
View File

@ -297,3 +297,14 @@ int onfi_init_data_interface(struct nand_chip *chip,
return 0;
}
EXPORT_SYMBOL(onfi_init_data_interface);
/**
* nand_get_default_data_interface - [NAND Interface] Retrieve NAND
* data interface for mode 0. This is used as default timing after
* reset.
*/
const struct nand_data_interface *nand_get_default_data_interface(void)
{
return &onfi_sdr_timings[0];
}
EXPORT_SYMBOL(nand_get_default_data_interface);

2
include/linux/mtd/nand.h
View File

@ -1183,6 +1183,8 @@ uint8_t nand_read_byte(struct mtd_info *mtd);
/* get timing characteristics from ONFI timing mode. */
const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode);
/* get data interface from ONFI timing mode 0, used after reset. */
const struct nand_data_interface *nand_get_default_data_interface(void);
int nand_check_erased_ecc_chunk(void *data, int datalen,
void *ecc, int ecclen,