linux-kernel - [PATCH 0/3] mtd: spi-nor: introduce optional rdid-dummy-ncycles DT property

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Message-Id: <20250319-snor-rdid-dummy-ncycles-v1-0-fbf64e4c226a@infineon.com>
Date: Wed, 19 Mar 2025 18:47:42 +0900
From: Takahiro Kuwano <tkuw584924@...il.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>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Bacem Daassi <Bacem.Daassi@...ineon.com>, 
 Takahiro Kuwano <Takahiro.Kuwano@...ineon.com>
Subject: [PATCH 0/3] mtd: spi-nor: introduce optional rdid-dummy-ncycles DT
 property

There are infineon flashes [1] that require 8 dummy cycles for the
1-1-1 Read ID command. Since the command is not covered by JESD216
or any other standard, introduce an optional "rdid-dummy-ncycles"
DT property to allow flashes to be correctly identified.
Add support for CYRS17B512.

Link: https://www.infineon.com/dgdl/Infineon-CYRS17B512_512_MB_64_MB_SERIAL_NOR_FLASH_SPI_QSPI_3-DataSheet-v07_00-EN.pdf?fileId=8ac78c8c8fc2dd9c01900eee733d45f3 [1]

Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@...ineon.com>
---
Takahiro Kuwano (3):
      dt-bindings: mtd: jedec,spi-nor: add optional rdid-dummy-ncycles
      mtd: spi-nor: use rdid-dummy-ncycles DT property
      mtd: spi-nor: spansion: add support for CYRS17B512

 .../devicetree/bindings/mtd/jedec,spi-nor.yaml          |  6 ++++++
 drivers/mtd/spi-nor/core.c                              |  9 ++++++++-
 drivers/mtd/spi-nor/spansion.c                          | 17 +++++++++++++++++
 3 files changed, 31 insertions(+), 1 deletion(-)
---
base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b
change-id: 20250214-snor-rdid-dummy-ncycles-73575ecc7b8d

Best regards,
-- 
Takahiro Kuwano <Takahiro.Kuwano@...ineon.com>