[PATCH v1 1/3] dt-bindings: gpio: add Phytium GPIO controller

[Zhu Ling]

Add the devicetree binding schema for the Phytium platform GPIO
controller.

Register the "phytium" vendor prefix used by the compatible string.

Use ngpios as the preferred child-node property and keep nr-gpios as
deprecated for compatibility with existing firmware descriptions.

Signed-off-by: Zhu Ling <1536943441@xxxxxx>
---
 .../bindings/gpio/phytium,gpio.yaml           | 134 ++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 2 files changed, 136 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/phytium,gpio.yaml

diff --git a/Documentation/devicetree/bindings/gpio/phytium,gpio.yaml b/Documentation/devicetree/bindings/gpio/phytium,gpio.yaml
new file mode 100644
index 000000000..1b9200c57
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/phytium,gpio.yaml
@@ -0,0 +1,134 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/phytium,gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Phytium GPIO controller
+
+description: |
+  Phytium GPIO controllers expose one GPIO/interrupt controller and up to
+  two configurable ports. Child nodes describe per-port configuration.
+
+maintainers:
+  - Chen Baozi <chenbaozi@xxxxxxxxxxxxxx>
+
+properties:
+  $nodename:
+    pattern: "^gpio@[0-9a-f]+$"
+
+  compatible:
+    const: phytium,gpio
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  '#gpio-cells':
+    const: 2
+
+  interrupts:
+    description: |
+      The interrupts to the parent controller raised when GPIOs generate
+      the interrupts. If the controller provides one combined interrupt
+      for all GPIOs, specify a single interrupt. If the controller provides
+      one interrupt for each GPIO, provide a list of interrupts that
+      correspond to each of the GPIO pins.
+    minItems: 1
+    maxItems: 32
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+patternProperties:
+  "^gpio-port@[0-9a-f]+$":
+    type: object
+    properties:
+      compatible:
+        const: phytium,gpio-port
+
+      reg:
+        maxItems: 1
+
+      gpio-controller: true
+
+      '#gpio-cells':
+        const: 2
+
+      ngpios:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: The number of GPIO pins exported by the port.
+        default: 32
+        minimum: 1
+        maximum: 32
+
+      nr-gpios:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: The number of GPIO pins exported by the port.
+        deprecated: true
+        default: 32
+        minimum: 1
+        maximum: 32
+
+    required:
+      - compatible
+      - reg
+      - gpio-controller
+      - '#gpio-cells'
+
+    additionalProperties: false
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - "#gpio-cells"
+  - interrupts
+  - interrupt-controller
+  - "#interrupt-cells"
+  - "#address-cells"
+  - "#size-cells"
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    gpio: gpio@28004000 {
+      compatible = "phytium,gpio";
+      reg = <0x28004000 0x1000>;
+      gpio-controller;
+      #gpio-cells = <2>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+      interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
+      interrupt-controller;
+      #interrupt-cells = <2>;
+
+      porta: gpio-port@0 {
+        compatible = "phytium,gpio-port";
+        reg = <0>;
+        gpio-controller;
+        #gpio-cells = <2>;
+        ngpios = <8>;
+      };
+
+      portb: gpio-port@1 {
+        compatible = "phytium,gpio-port";
+        reg = <1>;
+        gpio-controller;
+        #gpio-cells = <2>;
+        ngpios = <8>;
+      };
+    };
+...
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index ee7fd3cfe..2c3f9777d 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1265,6 +1265,8 @@ patternProperties:
     description: PHICOMM Co., Ltd.
   "^phontech,.*":
     description: Phontech
+  "^phytium,.*":
+    description: Phytium Technology Co., Ltd.
   "^phytec,.*":
     description: PHYTEC Messtechnik GmbH
   "^picochip,.*":
-- 
2.34.1