[PATCH v3 0/3] mtd: spi-nor: Extend SFDP to support additional octal modes as per latest JEDEC standard

Nathan Barrett-Morrison nathan.morrison at timesys.com
Thu Dec 1 13:27:47 PST 2022

In the latest JEDEC standard (JESD216F), there are now bitfields in the
4 byte address instruction table for 1S-1S-8S and 1S-8S-8S modes

This patchset adds support for checking the 4BAIT for these modes,
along with additional NO_SFDP_FLAGS to support enabling these new modes

v2: Move page program commands into sfdp.c instead of core.c,
as this appears to conform more closely with spi-nor paradigm.
Page program buswidth appears to be automatically determined, so let's
follow suit and do the same.

 - Added missing SPI_NOR_OCTAL_READ_1_8_8 to spi_nor_sfdp check in
 - Convert IS25LX256 to 1S-8S-8S instead of 1S-1S-8S
 - Tested and confirmed both 1S-1S-8S and 1S-8S-8S work on IS25LX256

Nathan Barrett-Morrison (3):
  mtd: spi-nor: Extend SFDP 4byte address instruction lookup table with
    new octal modes as per JEDEC JESD216F
  mtd: spi-nor: Add additional octal-mode flags to be checked during
  mtd: spi-nor: Add support for IS25LX256 operating in 1S-8S-8S octal
    read mode

 drivers/mtd/spi-nor/core.c |  8 ++++++++
 drivers/mtd/spi-nor/core.h |  5 +++--
 drivers/mtd/spi-nor/issi.c |  3 +++
 drivers/mtd/spi-nor/sfdp.c | 13 +++++++++++++
 4 files changed, 27 insertions(+), 2 deletions(-)


More information about the linux-mtd mailing list