dt-bindings: mtd: brcmnand: Add WP pin connection property

Add brcm,wp-not-connected property to have an option for disabling this
feature on broadband board design that does not connect WP pin.

Signed-off-by: William Zhang <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]

Author: William Zhang

Documentation/devicetree/bindings/mtd/brcm,brcmnand.yaml

@@ -113,6 +113,13 @@ properties:
       earlier versions of this core that include WP
     type: boolean
 
+  brcm,wp-not-connected:
+    description:
+      Use this property when WP pin is not physically wired to the NAND chip.
+      Write protection feature cannot be used. By default, controller assumes
+      the pin is connected and feature is used.
+    $ref: /schemas/types.yaml#/definitions/flag
+
 patternProperties:
   "^nand@[a-f0-9]$":
     type: object