diff options
| author | Takahiro Kuwano <Takahiro.Kuwano@infineon.com> | 2021-06-29 15:01:02 +0900 |
|---|---|---|
| committer | Jagan Teki <jagan@amarulasolutions.com> | 2021-06-29 19:16:54 +0530 |
| commit | 72151ad10f8dcc3c86084259b227a7d70cc79473 (patch) | |
| tree | 475d783fcf6b2b7de17377c3d74d21ed7edfdf33 | |
| parent | d2d79895da1b80275fe0ffd84d697519c73c924d (diff) | |
| download | u-boot-72151ad10f8dcc3c86084259b227a7d70cc79473.zip u-boot-72151ad10f8dcc3c86084259b227a7d70cc79473.tar.gz u-boot-72151ad10f8dcc3c86084259b227a7d70cc79473.tar.bz2 | |
mtd: spi-nor-core: Add Cypress manufacturer ID in set_4byte
Cypress chips support SPINOR_OP_EN4B(B7h) to enable 4-byte addressing mode.
Cypress chips support B8h to disable 4-byte addressing mode instead of
SPINOR_OP_EX4B(E9h).
This patch defines new opcode and updates set_4byte() to support
enable/disable 4-byte addressing mode for Cypress chips.
Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
| -rw-r--r-- | drivers/mtd/spi/spi-nor-core.c | 3 | ||||
| -rw-r--r-- | include/linux/mtd/spi-nor.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c index 7f1ed1b..94dfa97 100644 --- a/drivers/mtd/spi/spi-nor-core.c +++ b/drivers/mtd/spi/spi-nor-core.c @@ -662,6 +662,9 @@ static int set_4byte(struct spi_nor *nor, const struct flash_info *info, } return status; + case SNOR_MFR_CYPRESS: + cmd = enable ? SPINOR_OP_EN4B : SPINOR_OP_EX4B_CYPRESS; + return nor->write_reg(nor, cmd, NULL, 0); default: /* Spansion style */ nor->cmd_buf[0] = enable << 7; diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index b9d6645..6df82bd 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -123,6 +123,7 @@ #define SPINOR_OP_BRWR 0x17 /* Bank register write */ #define SPINOR_OP_BRRD 0x16 /* Bank register read */ #define SPINOR_OP_CLSR 0x30 /* Clear status register 1 */ +#define SPINOR_OP_EX4B_CYPRESS 0xB8 /* Exit 4-byte mode */ #define SPINOR_OP_RDAR 0x65 /* Read any register */ #define SPINOR_OP_WRAR 0x71 /* Write any register */ #define SPINOR_REG_ADDR_STR1V 0x00800000 |