[PATCH 1/8] dt-bindings: arm/npcm: Add binding for global control registers (GCR)

[Jonathan Neuschäfer <j.neuschaefer@xxxxxxx>]

A nuvoton,*-gcr node is present in nuvoton-common-npcm7xx.dtsi and will
be added to nuvoton-wpcm450.dtsi. It is necessary for the NPCM7xx and
WPCM450 pinctrl drivers, and may later be used to retrieve SoC model and
version information.

This patch adds a binding to describe this node.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@xxxxxxx>
---
 .../bindings/arm/npcm/nuvoton,gcr.yaml        | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml

diff --git a/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml b/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml
new file mode 100644
index 0000000000000..3174279f7713a
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/npcm/nuvoton,gcr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Global Control Registers block in Nuvoton SoCs
+
+maintainers:
+  - Jonathan Neuschäfer <j.neuschaefer@xxxxxxx>
+
+description: |
+  The Global Control Registers (GCR) are a block of registers in Nuvoton SoCs
+  that expose misc functionality such as chip model and version information or
+  pinmux settings.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - nuvoton,wpcm450-gcr
+          - nuvoton,npcm750-gcr
+      - const: syscon
+      - const: simple-mfd
+  reg: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    gcr: gcr@800000 {
+      compatible = "nuvoton,npcm750-gcr", "syscon", "simple-mfd";
+      reg = <0x800000 0x1000>;
+    };
--
2.30.2