[PATCH v3 1/2] dt-bindings: mtd: Add realtek,rtl9301-ecc

[Markus Stockhausen]

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 at gmx.de>
---
Changes in v3:
- add optional properties clocks and interrupts.

Changes in v2:
- change cells from 2 to 1 (only 32 bit hardware)
---
 .../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 at 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 at 1a600 {
+            compatible = "realtek,rtl9301-ecc";
+            reg = <0x1a600 0x54>;
+        };
+    };
-- 
2.49.0