From 12bfcb84dc0852c97baff9ac1c0292a9db90c367 Mon Sep 17 00:00:00 2001
From: Markus Stockhausen <markus.stockhausen@gmx.de>
Date: Fri, 19 Sep 2025 03:52:00 -0400
Subject: [PATCH] dt-bindings: mtd: Add realtek,rtl9301-ecc

Add a dtschema for the ECC engine on the Realtek RTL93xx SoCs.
The engine supports BCH6 and BCH12 parity for 512 byte blocks.

The hardware can make use of interrupts but this is not yet
supported by the driver. From the known datasheets it is
connected to the LXB (lexra bus) and propably depends on its
clock. Provide an optional clock property that can describe
the relation.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 .../bindings/mtd/realtek,rtl9301-ecc.yaml     | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/realtek,rtl9301-ecc.yaml

diff --git a/Documentation/devicetree/bindings/mtd/realtek,rtl9301-ecc.yaml b/Documentation/devicetree/bindings/mtd/realtek,rtl9301-ecc.yaml
new file mode 100644
index 000000000000..55b35c3db0ff
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/realtek,rtl9301-ecc.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/realtek,rtl9301-ecc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek SoCs NAND ECC engine
+
+maintainers:
+  - Markus Stockhausen <markus.stockhausen@gmx.de>
+
+properties:
+  compatible:
+    const: realtek,rtl9301-ecc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        ecc0: ecc@1a600 {
+            compatible = "realtek,rtl9301-ecc";
+            reg = <0x1a600 0x54>;
+        };
+    };
-- 
2.47.3