[PATCH v5 1/7] dt-bindings: mtd: jedec,spi-nor: allow the SFDP to be exposed via NVMEM
From: Manikandan Muralidharan <manikandan.m@microchip.com>
Date: 2026-07-21 05:29:33
Also in:
linux-arm-kernel, linux-devicetree, lkml
Subsystem:
memory technology devices (mtd), open firmware and flattened device tree bindings, spi nor subsystem, the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Pratyush Yadav, Michael Walle, Linus Torvalds
Add an optional "sfdp" child node (compatible "jedec,sfdp") that describes the SFDP as a read-only NVMEM provider via nvmem.yaml, so its contents (e.g. a vendor EUI-48/EUI-64) can be read through NVMEM cells. Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com> Reviewed-by: Linus Walleij <linusw@kernel.org> --- .../devicetree/bindings/mtd/jedec,spi-nor.yaml | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
index 587af4968255..98fd954598ab 100644
--- a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
+++ b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml@@ -103,6 +103,20 @@ properties: spi-cpol: true spi-cpha: true + sfdp: + $ref: /schemas/nvmem/nvmem.yaml# + unevaluatedProperties: false + description: + The Serial Flash Discoverable Parameters (SFDP) tables exposed as a + read-only NVMEM device. This allows standard or vendor-specific SFDP + data (for example a factory-programmed EUI-48/EUI-64 identifier) to be + consumed through NVMEM cells. + properties: + compatible: + const: jedec,sfdp + required: + - compatible + dependencies: spi-cpol: [ spi-cpha ] spi-cpha: [ spi-cpol ]
@@ -122,6 +136,10 @@ examples: spi-max-frequency = <40000000>; m25p,fast-read; reset-gpios = <&gpio 12 GPIO_ACTIVE_LOW>; + + sfdp { + compatible = "jedec,sfdp"; + }; }; }; ...
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2.43.0