linux-kernel - [PATCH v9 2/3] dt-bindings: edac: nuvoton: add NPCM memory controller

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Message-Id: <20220510031056.1657-3-ctcchien@nuvoton.com>
Date:   Tue, 10 May 2022 11:10:55 +0800
From:   Medad CChien <medadyoung@...il.com>
To:     rric@...nel.org, james.morse@....com, tony.luck@...el.com,
        mchehab@...nel.org, bp@...en8.de, robh+dt@...nel.org,
        benjaminfair@...gle.com, yuenn@...gle.com, venture@...gle.com,
        KWLIU@...oton.com, YSCHU@...oton.com, JJLIU0@...oton.com,
        KFTING@...oton.com, avifishman70@...il.com, tmaimon77@...il.com,
        tali.perry1@...il.com, ctcchien@...oton.com
Cc:     linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, openbmc@...ts.ozlabs.org
Subject: [PATCH v9 2/3] dt-bindings: edac: nuvoton: add NPCM memory controller

Document devicetree bindings for the Nuvoton BMC NPCM memory controller.

Signed-off-by: Medad CChien <ctcchien@...oton.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
---
 .../edac/nuvoton,npcm-memory-controller.yaml  | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/edac/nuvoton,npcm-memory-controller.yaml

diff --git a/Documentation/devicetree/bindings/edac/nuvoton,npcm-memory-controller.yaml b/Documentation/devicetree/bindings/edac/nuvoton,npcm-memory-controller.yaml
new file mode 100644
index 000000000000..6f37211796a3
--- /dev/null
+++ b/Documentation/devicetree/bindings/edac/nuvoton,npcm-memory-controller.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/edac/nuvoton,npcm-memory-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton NPCM Memory Controller
+
+maintainers:
+  - Medad CChien <ctcchien@...oton.com>
+
+description: |
+  The Nuvoton BMC SoC supports DDR4 memory with and without ECC (error
+  correction check).
+
+  The memory controller supports single bit error correction, double bit
+  error detection (in-line ECC in which a section (1/8th) of the memory
+  device used to store data is used for ECC storage).
+
+  Note, the bootloader must configure ECC mode for the memory controller.
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,npcm750-memory-controller
+      - nuvoton,npcm845-memory-controller
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 1
+    items:
+      - description: uncorrectable error interrupt
+      - description: correctable error interrupt
+
+  interrupt-names:
+    minItems: 1
+    items:
+      - const: ue
+      - const: ce
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    ahb {
+        #address-cells = <2>;
+        #size-cells = <2>;
+        mc: memory-controller@...24000 {
+            compatible = "nuvoton,npcm750-memory-controller";
+            reg = <0x0 0xf0824000 0x0 0x1000>;
+            interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+        };
+    };
-- 
2.17.1