[PATCH v6 2/2] schemas: memory: Add ECC properties

[Simon Glass]

Some memories provide ECC detection and/or correction. For software which
wants to check memory, it is helpful to see which regions provide this
feature.

Add this as a property of the /memory nodes, since it presumably follows
the hardware-level memory system.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v6:
- Use a number of bits instead of a string property
- Fix inidcates typo

Changes in v5:
- Redo to make this property specific to ECC
- Provide properties both for detection and correction

Changes in v3:
- Add new patch to update the /memory nodes

 dtschema/schemas/memory.yaml | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/dtschema/schemas/memory.yaml b/dtschema/schemas/memory.yaml
index 1d74410..1a48b1c 100644
--- a/dtschema/schemas/memory.yaml
+++ b/dtschema/schemas/memory.yaml
@@ -31,10 +31,21 @@ patternProperties:
 
       numa-node-id:
         $ref: types.yaml#/definitions/uint32
-        description:
+        description: |
           For the purpose of identification, each NUMA node is associated with
           a unique token known as a node id.
-
+      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).
 
     required:
       - device_type
-- 
2.42.0.283.g2d96d420d3-goog