linux-kernel - [PATCH v4 0/3] mtd: spi-nor: Extend SFDP to support additional octal modes as per latest JEDEC standard

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Date:   Fri,  2 Dec 2022 08:55:36 -0500
From:   Nathan Barrett-Morrison <nathan.morrison@...esys.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     nathan.morrison@...esys.com, greg.malysa@...esys.com,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <pratyush@...nel.org>,
        Michael Walle <michael@...le.cc>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org (open list:SPI NOR SUBSYSTEM),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4 0/3] mtd: spi-nor: Extend SFDP to support additional octal modes as per latest JEDEC standard

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.

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.

v3:
 - Added missing SPI_NOR_OCTAL_READ_1_8_8 to spi_nor_sfdp check in
   spi_nor_init_params_deprecated()
 - 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

v4:
 - Remove SPI_NOR_OCTAL_READ_1_8_8, this was following a defunct path
 - Correct the IS25LX256's missing BFPT info via a fixup instead

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 page program flags to be
    checked during SFDP 4BAIT parsing
  mtd: spi-nor: Add support for IS25LX256 operating in 1S-8S-8S octal
    read mode

 drivers/mtd/spi-nor/issi.c | 32 ++++++++++++++++++++++++++++++++
 drivers/mtd/spi-nor/sfdp.c | 13 +++++++++++++
 2 files changed, 45 insertions(+)

-- 
2.30.2