[PATCH 1/5] dt-bindings: gpio: Add RZ/V2M PWC GPIO driver bindings

[Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>]

Add dt-bindings document for the RZ/V2M PWC GPIO driver.

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
---
 .../bindings/gpio/renesas,rzv2m-pwc-gpio.yaml | 62 +++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/renesas,rzv2m-pwc-gpio.yaml

diff --git a/Documentation/devicetree/bindings/gpio/renesas,rzv2m-pwc-gpio.yaml b/Documentation/devicetree/bindings/gpio/renesas,rzv2m-pwc-gpio.yaml
new file mode 100644
index 000000000000..ecc034d53259
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/renesas,rzv2m-pwc-gpio.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/renesas,rzv2m-pwc-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/V2M External Power Sequence Controller (PWC) GPIO
+
+description: |+
+  The PWC IP found in the RZ/V2M family of chips comes with General-Purpose
+  Output pins, alongside the below functions
+    - external power supply on/off sequence generation
+    - on/off signal generation for the LPDDR4 core power supply (LPVDD)
+    - key input signals processing
+  This node uses syscon to map the register used to control the GPIOs
+  (the register map is retrieved from the parent dt-node), and the node should
+  be represented as a sub node of a "syscon", "simple-mfd" node.
+
+maintainers:
+  - Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,r9a09g011-pwc-gpio # RZ/V2M
+          - renesas,r9a09g055-pwc-gpio # RZ/V2MA
+      - const: renesas,rzv2m-pwc-gpio
+
+  offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Offset in the register map for controlling the GPIOs (in bytes).
+
+  regmap:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle to the register map node.
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+required:
+  - compatible
+  - regmap
+  - offset
+  - gpio-controller
+  - '#gpio-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    gpio {
+            compatible = "renesas,r9a09g011-pwc-gpio",
+                         "renesas,rzv2m-pwc-gpio";
+            regmap = <&regmapnode>;
+            offset = <0x80>;
+            gpio-controller;
+            #gpio-cells = <2>;
+    };
-- 
2.34.1