dts: bindings: gpio: add binding for PCAL6416A

Add the binding for the driver of the chip PCAL6416A.

Signed-off-by: Benedikt Schmidt <benedikt.schmidt@embedded-solutions.at>

dts/bindings/gpio/nxp,pcal6408a.yaml

@@ -1,30 +1,14 @@
 # Copyright (c) 2021 Nordic Semiconductor ASA
+# Copyright (c) 2023 SILA Embedded Solutions GmbH
 # SPDX-License-Identifier: Apache-2.0
 
 description: PCAL6408A 8-bit I2C-based I/O expander
 
 compatible: "nxp,pcal6408a"
 
-include: [i2c-device.yaml, gpio-controller.yaml]
+include: nxp,pcal64xxa-base.yaml
 
 properties:
   ngpios:
     required: true
     const: 8
-
-  int-gpios:
-    type: phandle-array
-    description: |
-      GPIO connected to the controller INT pin. This pin is active-low.
-
-  reset-gpios:
-    type: phandle-array
-    description: |
-      GPIO connected to the controller RESET pin. This pin is active-low.
-
-  "#gpio-cells":
-    const: 2
-
-gpio-cells:
-  - pin
-  - flags

dts/bindings/gpio/nxp,pcal6416a.yaml

@@ -0,0 +1,13 @@
+# Copyright (c) 2023 SILA Embedded Solutions GmbH
+# SPDX-License-Identifier: Apache-2.0
+
+description: PCAL6416A 16-bit I2C-based I/O expander
+
+compatible: "nxp,pcal6416a"
+
+include: nxp,pcal64xxa-base.yaml
+
+properties:
+  ngpios:
+    required: true
+    const: 16

dts/bindings/gpio/nxp,pcal64xxa-base.yaml

@@ -0,0 +1,23 @@
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# Copyright (c) 2023 SILA Embedded Solutions GmbH
+# SPDX-License-Identifier: Apache-2.0
+
+include: [i2c-device.yaml, gpio-controller.yaml]
+
+properties:
+  int-gpios:
+    type: phandle-array
+    description: |
+      GPIO connected to the controller INT pin. This pin is active-low.
+
+  reset-gpios:
+    type: phandle-array
+    description: |
+      GPIO connected to the controller RESET pin. This pin is active-low.
+
+  "#gpio-cells":
+    const: 2
+
+gpio-cells:
+  - pin
+  - flags