[PATCH 3/5] dt-bindings: mfd: Add RZ/V2M PWC global registers bindings

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

The RZ/V2M PWC is a multi-function device, and its software
support relies on "syscon" and "simple-mfd".
Add the dt-bindings for the top level device tree node.

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
---
 .../bindings/mfd/renesas,rzv2m-pwc.yaml       | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/renesas,rzv2m-pwc.yaml

diff --git a/Documentation/devicetree/bindings/mfd/renesas,rzv2m-pwc.yaml b/Documentation/devicetree/bindings/mfd/renesas,rzv2m-pwc.yaml
new file mode 100644
index 000000000000..a7e180bfbd83
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/renesas,rzv2m-pwc.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/renesas,rzv2m-pwc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/V2M External Power Sequence Controller (PWC)
+
+description: |+
+  The PWC IP found in the RZ/V2M family of chips comes with the below
+  capabilities
+    - external power supply on/off sequence generation
+    - on/off signal generation for the LPDDR4 core power supply (LPVDD)
+    - key input signals processing
+    - general-purpose output pins
+
+maintainers:
+  - Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,r9a09g011-pwc # RZ/V2M
+          - renesas,r9a09g055-pwc # RZ/V2MA
+      - const: renesas,rzv2m-pwc
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  gpio:
+    type: object
+    $ref: /schemas/gpio/renesas,rzv2m-pwc-gpio.yaml#
+    description: General-Purpose Output pins controller.
+
+  poweroff:
+    type: object
+    $ref: /schemas/power/reset/renesas,rzv2m-pwc-poweroff.yaml#
+    description: Power OFF controller.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    pwc: pwc@a3700000 {
+            compatible = "renesas,r9a09g011-pwc", "renesas,rzv2m-pwc", "syscon",
+                         "simple-mfd";
+            reg = <0xa3700000 0x800>;
+
+            gpio {
+                    compatible = "renesas,r9a09g011-pwc-gpio",
+                                 "renesas,rzv2m-pwc-gpio";
+                    regmap = <&pwc>;
+                    offset = <0x80>;
+                    gpio-controller;
+                    #gpio-cells = <2>;
+            };
+
+            poweroff {
+                    compatible = "renesas,r9a09g011-pwc-poweroff",
+                                 "renesas,rzv2m-pwc-poweroff";
+                    regmap = <&pwc>;
+            };
+    };
-- 
2.34.1