[PATCH v7 1/7] dt-bindings: mtd: jedec,spi-nor: allow the SFDP to be exposed via NVMEM

[Manikandan Muralidharan <manikandan.m@microchip.com>]

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.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
---
 .../bindings/mtd/jedec,spi-nor.yaml           | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
index 587af4968255..d7e659912b4a 100644
--- a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
+++ b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
@@ -103,6 +103,22 @@ 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 +138,10 @@ examples:
             spi-max-frequency = <40000000>;
             m25p,fast-read;
             reset-gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+
+            sfdp {
+                compatible = "jedec,sfdp";
+            };
         };
     };
 ...
-- 
2.43.0