[PATCH v5 1/8] dt-bindings: interrupt-controller: Add support for Realtek DHC SoCs

[Yu-Chun Lin <eleanor.lin@realtek.com>]

From: James Tai <james.tai@realtek.com>

Add DT binding schema for Realtek DHC (Digital Home Center) SoCs interrupt
controllers.

Signed-off-by: James Tai <james.tai@realtek.com>
Co-developed-by: Yu-Chun Lin <eleanor.lin@realtek.com>
Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com>
---
 .../realtek,rtd1319-intc-iso.yaml             | 170 ++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/realtek,rtd1319-intc-iso.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/realtek,rtd1319-intc-iso.yaml b/Documentation/devicetree/bindings/interrupt-controller/realtek,rtd1319-intc-iso.yaml
new file mode 100644
index 000000000000..5540f6304795
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/realtek,rtd1319-intc-iso.yaml
@@ -0,0 +1,170 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/realtek,rtd1319-intc-iso.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek DHC (Digital Home Center) SoCs Interrupt Controller
+
+maintainers:
+  - James Tai <james.tai@realtek.com>
+  - Yu-Chun Lin <eleanor.lin@realtek.com>
+
+description:
+  This interrupt controller is a component of Realtek DHC SoCs and is designed
+  to receive interrupts from peripheral devices.
+
+properties:
+  compatible:
+    enum:
+      - realtek,rtd1319-intc-iso
+      - realtek,rtd1319-intc-misc
+      - realtek,rtd1319d-intc-iso
+      - realtek,rtd1319d-intc-misc
+      - realtek,rtd1619b-intc-iso
+      - realtek,rtd1619b-intc-misc
+      - realtek,rtd1625-intc-iso
+      - realtek,rtd1625-intc-isom
+      - realtek,rtd1625-intc-misc
+
+  interrupt-controller: true
+
+  '#address-cells':
+    const: 0
+
+  interrupts:
+    minItems: 1
+    maxItems: 4
+    description:
+      Contains the GIC SPI interrupts mapped to the external interrupt lines.
+
+  "#interrupt-cells":
+    description:
+      Specifies the number of cells in an interrupt specifier.
+      For realtek,rtd1625-intc-misc, the first cell specifies the interrupt
+      bank and the second cell specifies the interrupt ID within that bank.
+      Other variants use one cell to specify the interrupt ID.
+
+required:
+  - compatible
+  - interrupt-controller
+  - '#interrupt-cells'
+  - '#address-cells'
+  - interrupts
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          enum:
+            - realtek,rtd1319-intc-iso
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: Miscellaneous interrupts
+            - description: RTC interrupt
+  - if:
+      properties:
+        compatible:
+          enum:
+            - realtek,rtd1319d-intc-iso
+            - realtek,rtd1619b-intc-iso
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: Miscellaneous interrupts
+            - description: Watchdog interrupt
+  - if:
+      properties:
+        compatible:
+          enum:
+            - realtek,rtd1319-intc-misc
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: Miscellaneous interrupts
+            - description: Watchdog interrupt
+            - description: Uart1 interrupt
+            - description: Uart2 interrupt
+  - if:
+      properties:
+        compatible:
+          enum:
+            - realtek,rtd1319d-intc-misc
+            - realtek,rtd1619b-intc-misc
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: Miscellaneous interrupts
+            - description: Uart1 interrupt
+            - description: Uart2 interrupt
+  - if:
+      properties:
+        compatible:
+          enum:
+            - realtek,rtd1625-intc-iso
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: Miscellaneous interrupts
+            - description: Uart9 interrupt
+            - description: RTC interrupt
+  - if:
+      properties:
+        compatible:
+          enum:
+            - realtek,rtd1625-intc-isom
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: Miscellaneous interrupts
+  - if:
+      properties:
+        compatible:
+          enum:
+            - realtek,rtd1625-intc-misc
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: Miscellaneous interrupts
+            - description: Uart3 interrupts
+            - description: Uart1 interrupt
+            - description: Uart2 interrupt
+  - if:
+      properties:
+        compatible:
+          enum:
+            - realtek,rtd1625-intc-misc
+    then:
+      properties:
+        "#interrupt-cells":
+          const: 2
+    else:
+      properties:
+        "#interrupt-cells":
+          const: 1
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    interrupt-controller {
+      compatible = "realtek,rtd1319-intc-iso";
+      interrupt-parent = <&gic>;
+      interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
+      interrupt-controller;
+      #address-cells = <0>;
+      #interrupt-cells = <1>;
+    };
+...
-- 
2.43.0