[PATCH 2/2] dt-bindings: gpio: realtek: Add realtek,rtd-gpio bindings

[Tzuyi Chang]

This patch adds the device tree bindings for the Realtek DHC RTD SoCs
GPIO controllers.

Signed-off-by: Tzuyi Chang <tychang@xxxxxxxxxxx>
---
 .../bindings/gpio/realtek,rtd-gpio.yaml       | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/realtek,rtd-gpio.yaml

diff --git a/Documentation/devicetree/bindings/gpio/realtek,rtd-gpio.yaml b/Documentation/devicetree/bindings/gpio/realtek,rtd-gpio.yaml
new file mode 100644
index 000000000000..6cab7ec50c88
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/realtek,rtd-gpio.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Realtek Semiconductor Corporation
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/realtek,rtd-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek DHC GPIO controller
+
+maintainers:
+  - TY Chang <tychang@xxxxxxxxxxx>
+
+properties:
+  compatible:
+    enum:
+      - realtek,rtd-gpio
+      - realtek,rtd1295-misc-gpio
+      - realtek,rtd1295-iso-gpio
+      - realtek,rtd1395-iso-gpio
+      - realtek,rtd1619-iso-gpio
+
+  reg:
+    maxItems: 2
+
+  interrupts:
+    maxItems: 2
+
+  gpio-ranges: true
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - gpio-ranges
+  - gpio-controller
+  - "#gpio-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    gpio@100 {
+      compatible = "realtek,rtd-gpio";
+      reg = <0x100 0x100>,
+            <0x000 0x0b0>;
+      interrupt-parent = <&iso_irq_mux>;
+      interrupts = <19>, <20>;
+      gpio-ranges = <&pinctrl 0 0 82>;
+      gpio-controller;
+      #gpio-cells = <2>;
+    };
-- 
2.42.0