linux-kernel - [PATCH v3 2/2] memory: Add ECC property

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Message-ID: <20230822203446.4111742-2-sjg@chromium.org>
Date:   Tue, 22 Aug 2023 14:34:43 -0600
From:   Simon Glass <sjg@...omium.org>
To:     devicetree@...r.kernel.org
Cc:     Rob Herring <robh@...nel.org>, Ard Biesheuvel <ardb@...nel.org>,
        Chiu Chasel <chasel.chiu@...el.com>,
        U-Boot Mailing List <u-boot@...ts.denx.de>,
        Gua Guo <gua.guo@...el.com>, linux-acpi@...r.kernel.org,
        lkml <linux-kernel@...r.kernel.org>,
        Yunhui Cui <cuiyunhui@...edance.com>,
        ron minnich <rminnich@...il.com>,
        Tom Rini <trini@...sulko.com>,
        Lean Sheng Tan <sheng.tan@...ements.com>,
        Mark Rutland <mark.rutland@....com>,
        Simon Glass <sjg@...omium.org>
Subject: [PATCH v3 2/2] memory: Add ECC property

Some memories provides ECC 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@...omium.org>
---

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

 dtschema/schemas/memory.yaml | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/dtschema/schemas/memory.yaml b/dtschema/schemas/memory.yaml
index 1d74410..981af04 100644
--- a/dtschema/schemas/memory.yaml
+++ b/dtschema/schemas/memory.yaml
@@ -34,7 +34,14 @@ patternProperties:
         description:
           For the purpose of identification, each NUMA node is associated with
           a unique token known as a node id.
-
+      attr:
+        $ref: /schemas/types.yaml#/definitions/string-array
+        description: |
+          Attributes possessed by this memory region:
+
+            "single-bit-ecc" - supports single-bit ECC
+            "multi-bit-ecc" - supports multiple-bit ECC
+            "no-ecc" - non-ECC memory
 
     required:
       - device_type
-- 
2.42.0.rc1.204.g551eb34607-goog