diff options
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/spi/winbond.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c index a9d03fbb1a..e9c7e48c34 100644 --- a/drivers/mtd/nand/spi/winbond.c +++ b/drivers/mtd/nand/spi/winbond.c @@ -321,9 +321,34 @@ static int winbond_spinand_octal_dtr_disable(struct spinand_device *spinand) return 0; } +static int winbond_change_spi_protocol(struct spinand_device *spinand, + const enum spinand_protocol protocol) +{ + if (spinand->protocol == protocol) + return 0; + + switch (spinand->protocol) { + case SPINAND_1S: + if (protocol == SPINAND_8D) + return winbond_spinand_octal_dtr_enable(spinand); + break; + + case SPINAND_8D: + if (protocol == SPINAND_1S) + return winbond_spinand_octal_dtr_disable(spinand); + break; + + default: + return -EOPNOTSUPP; + } + + return -EOPNOTSUPP; +} + static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = { .detect = winbond_spinand_detect, .init = winbond_spinand_init, + .change_protocol = winbond_change_spi_protocol, }; const struct spinand_manufacturer winbond_spinand_manufacturer = { |