schemas: reserved-memory: Add ECC parameters

Some memory controllers have the ability to tune the ECC parameters for
a given memory region. This can be useful to create memory carveouts
with ECC disabled to store data that don't require it like framebuffers,
when the rest of the system might benefit from it still.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

dtschema/schemas/reserved-memory/reserved-memory.yaml

@@ -52,6 +52,20 @@ properties:
       Address and Length pairs. Specifies regions of memory that are
       acceptable to allocate from.
 
+  ecc-detection-bits:
+    default: 0
+    description: |
+      If present, this indicates the number of bits of memory error
+      which can be detected and reported by the Error-Correction Code
+      (ECC) memory subsystem (typically 0, 1 or 2).
+
+  ecc-correction-bits:
+    default: 0
+    description: |
+      If present, this indicates the number of bits of memory error
+      which can be corrected by the Error-Correction Code (ECC) memory
+      subsystem (typically 0, 1 or 2).
+
   iommu-addresses:
     $ref: /schemas/types.yaml#/definitions/phandle-array
     description: >