[PATCH v2 2/2] dt-bindings: gpio: Add bindings for NXP PCA9570

[Sungbo Eo <mans0n@xxxxxxxxxx>]

This patch adds device tree bindings for the NXP PCA9570,
a 4-bit I2C GPO expander.

Signed-off-by: Sungbo Eo <mans0n@xxxxxxxxxx>
---
I don't feel I can really maintain this driver, but it seems all yaml docs
have a maintainers field so I just added it...
---
 .../bindings/gpio/gpio-pca9570.yaml           | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml

diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml b/Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml
new file mode 100644
index 000000000000..996b0ed2f58f
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-pca9570.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PCA9570 I2C GPO expander
+
+maintainers:
+  - Sungbo Eo <mans0n@xxxxxxxxxx>
+
+properties:
+  compatible:
+    enum:
+      - nxp,pca9570
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - "#gpio-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    gpio@24 {
+        compatible = "nxp,pca9570";
+        reg = <0x24>;
+        gpio-controller;
+        #gpio-cells = <2>;
+    };
+
+...
-- 
2.27.0