[PATCH v3 0/3] mtd: spi-nor: otp: 4 byte mode fix and erase support

Michael Walle
2021-05-20T16:00:01Z

This series is the follow up on the single patch
mtd: spi-nor: implement OTP erase for Winbond and similar flashes

Pratyush Yadav discovered a likely problem with bigger flashes, the address
to access the security registers is either 3 or 4 byte (at least for
winbond flashes).

Changes since v2:
- fix 3/4 byte mode access
- use spi_nor_erase_sector() by swapping the nor->erase_opcode
- use more consistent wording regarding the security registers

Changes since v1:
- fixed kernel doc

There is also a patch for mtd-utils to add a small tool to issue
the erase:
https://lore.kernel.org/linux-mtd/20210510201319.25975-1-michael@walle.cc/

Michael Walle (3):
mtd: spi-nor: otp: fix access to security registers in 4 byte mode
mtd: spi-nor: otp: use more consistent wording
mtd: spi-nor: otp: implement erase for Winbond and similar flashes

drivers/mtd/spi-nor/core.c | 6 +--
drivers/mtd/spi-nor/core.h | 6 +++
drivers/mtd/spi-nor/otp.c | 79 +++++++++++++++++++++++++++++------
drivers/mtd/spi-nor/winbond.c | 1 +
4 files changed, 77 insertions(+), 15 deletions(-)

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2.20.1