[PATCH 1/2] dt-bindings: gpio: Add binding documentation for modepin

[Piyush Mehta <piyush.mehta@xxxxxxxxxx>]

Add DT binding document for modepin GPIO controller.

Signed-off-by: Piyush Mehta <piyush.mehta@xxxxxxxxxx>
State: pending
---
 .../bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml    | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml

diff --git a/Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml b/Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml
new file mode 100644
index 0000000..39d78f8
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/xlnx,zynqmp-gpio-modepin.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/gpio/xlnx,zynqmp-gpio-modepin.yaml#";
+$schema: "http://devicetree.org/meta-schemas/core.yaml#";
+
+title: ZynqMP Mode Pin GPIO controller
+
+description:
+  PS_MODE is 4-bits boot mode pins sampled on POR deassertion. Mode Pin
+  GPIO controller with configurable from numbers of pins (from 0 to 3 per
+  PS_MODE). Every pin can be configured as input/output.
+
+maintainers:
+  - Piyush Mehta <piyush.mehta@xxxxxxxxxx>
+
+properties:
+  compatible:
+    const: xlnx,zynqmp-gpio-modepin
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+
+required:
+  - compatible
+  - gpio-controller
+  - "#gpio-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    modepin_gpio: gpio {
+        compatible = "xlnx,zynqmp-gpio-modepin";
+        gpio-controller;
+        #gpio-cells = <2>;
+    };
+
+...
-- 
2.7.4