dt-bindings: Add devicetree bindings

Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").

Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/interrupt-controller/brcm,l2-intc.yaml

@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/brcm,l2-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom Generic Level 2 Interrupt Controller
+
+maintainers:
+  - Florian Fainelli <f.fainelli@gmail.com>
+
+allOf:
+  - $ref: /schemas/interrupt-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - brcm,hif-spi-l2-intc
+              - brcm,upg-aux-aon-l2-intc
+          - const: brcm,l2-intc
+      - items:
+          - enum:
+              - brcm,bcm2711-l2-intc
+          - const: brcm,l2-intc
+      - items:
+          - const: brcm,bcm7271-l2-intc
+      - items:
+          - const: brcm,l2-intc
+
+  reg:
+    maxItems: 1
+    description: >
+      Specifies the base physical address and size of the registers
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 1
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    maxItems: 1
+
+  brcm,irq-can-wake:
+    type: boolean
+    description: >
+      If present, this means the L2 controller can be used as a wakeup source
+      for system suspend/resume.
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - "#interrupt-cells"
+  - interrupts
+
+examples:
+  - |
+    hif_intr2_intc: interrupt-controller@f0441000 {
+      compatible = "brcm,l2-intc";
+      reg = <0xf0441000 0x30>;
+      interrupt-controller;
+      #interrupt-cells = <1>;
+      interrupt-parent = <&intc>;
+      interrupts = <0x0 0x20 0x0>;
+    };