linux-kernel - [PATCH v2 0/2] mtd: spi-nor: macronix: workaround for device id re-use

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Date: Mon, 03 Jun 2024 15:09:14 +0200
From: Esben Haabendal <esben@...nix.com>
To: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Pratyush Yadav <pratyush@...nel.org>, Michael Walle <mwalle@...nel.org>, 
 Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>
Cc: linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Rasmus Villemoes <rasmus.villemoes@...vas.dk>, 
 Esben Haabendal <esben@...nix.com>
Subject: [PATCH v2 0/2] mtd: spi-nor: macronix: workaround for device id
 re-use

I only have access to boards with MX25L3233F flashes, so haven't been
able to test the backwards compatibility. If anybody has boards with
MX25L3205D and/or MX25L3206E, please help test this patch. Keep an eye
for read performance regression.

It is worth nothing that both MX25L3205D and MX25L3206E are
end-of-life, and is unavailable from Macronix, so any new boards
featuring a Macronix flash with this ID will likely be using
MX25L3233F.

Signed-off-by: Esben Haabendal <esben@...nix.com>
---
Changes in v2:
- Added new flag (SPI_NOR_TRY_SFDP) to spi-nor core to allow trying
  SFDP and fallback to legacy parameters without having to specify
  DUAL/QUAD parameters.
- Rewrite macronix to use SPI_NOR_TRY_SFDP flag.
- Use with the ancient EoL MX25L3205D chip will not get speed
  increase, but stay at 1-bit mode as it is now.
- Link to v1: https://lore.kernel.org/r/20240524-macronix-mx25l3205d-fixups-v1-1-ee152e56afb3@geanix.com

---
Esben Haabendal (2):
      mtd: spi-nor: core: add flag for doing optional SFDP
      mtd: spi-nor: macronix: enable quad/dual speed for mx25l3205d chips

 drivers/mtd/spi-nor/core.c     | 3 ++-
 drivers/mtd/spi-nor/core.h     | 1 +
 drivers/mtd/spi-nor/macronix.c | 2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)
---
base-commit: a38297e3fb012ddfa7ce0321a7e5a8daeb1872b6
change-id: 20240524-macronix-mx25l3205d-fixups-882e92eed7d7

Best regards,
-- 
Esben Haabendal <esben@...nix.com>