[PATCH v4 1/4] dt-bindings: i2c: add support for AE350 I2C controller

[Ben Zong-You Xie via B4 Relay <devnull+ben717.andestech.com@kernel.org>]

From: Ben Zong-You Xie <ben717@andestech.com>

Document device tree bindings for the I2C controller on Andes AE350
platform.

The ATCIIC100 is a dedicated I2C controller IP developed by
Andes Technology. This IP block is a core component of the Andes
AE350 platform, which serves as a reference architecture for SoC
designs. The QiLai SoC also integrates this I2C controller.

The binding introduces the following compatible strings:
- "andestech,qilai-i2c": For the implementation integrated into the
  Andes QiLai SoC.
- "andestech,ae350-i2c": As a fallback compatible string representing
  the base IP design used across the AE350 platform architecture.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 .../bindings/i2c/andestech,ae350-i2c.yaml          | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/andestech,ae350-i2c.yaml b/Documentation/devicetree/bindings/i2c/andestech,ae350-i2c.yaml
new file mode 100644
index 000000000000..59a521fb249b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/andestech,ae350-i2c.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/andestech,ae350-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Andes I2C controller on AE350 platform
+
+maintainers:
+  - Ben Zong-You Xie <ben717@andestech.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - andestech,qilai-i2c
+          - const: andestech,ae350-i2c
+      - const: andestech,ae350-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c@f0a00000 {
+        compatible = "andestech,ae350-i2c";
+        reg = <0xf0a00000 0x100000>;
+        interrupts = <6 IRQ_TYPE_LEVEL_HIGH>;
+    };

-- 
2.34.1