[PATCH 01/11] dt-bindings: interrupt-controller: Add Cortina Systems CS7542 peripheral interrupt controller

[Fil Dunsky via B4 Relay <devnull+filipp.dunsky.gmail.com@kernel.org>]

From: Fil Dunsky <filipp.dunsky@gmail.com>

The low speed peripherals of the Cortina Systems CS75xx SoCs share one
GIC interrupt. A small controller in the peripheral register block
reports which of its 15 sources are asserted and allows masking them.

Signed-off-by: Fil Dunsky <filipp.dunsky@gmail.com>
---
 .../interrupt-controller/cortina,cs7542-intc.yaml  | 57 ++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/cortina,cs7542-intc.yaml b/Documentation/devicetree/bindings/interrupt-controller/cortina,cs7542-intc.yaml
new file mode 100644
index 000000000..2963acaf7
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/cortina,cs7542-intc.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/cortina,cs7542-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cortina Systems CS7542 peripheral interrupt controller
+
+maintainers:
+  - Fil Dunsky <filipp.dunsky@gmail.com>
+
+description:
+  The low speed peripherals of the Cortina Systems CS75xx (Goldengate G2)
+  SoCs (two software interrupts, two timers, the AXI bridge, SPI, the five
+  GPIO banks, I2C, MDIO, SSP and the random number generator) share one GIC
+  interrupt. This controller has a status register showing the level of the
+  15 sources and an enable register to mask them. The sources are cleared in
+  the peripherals themselves.
+
+properties:
+  compatible:
+    const: cortina,cs7542-intc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 1
+    description:
+      The number of the source, 0 to 14. All sources are active high level
+      interrupts.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-controller
+  - "#interrupt-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    interrupt-controller@f0070004 {
+        compatible = "cortina,cs7542-intc";
+        reg = <0xf0070004 0x8>;
+        interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-controller;
+        #interrupt-cells = <1>;
+    };

-- 
2.53.0