[PATCH v4 04/15] dt-bindings: gpio: Add AXP192 GPIO bindings

[Aidan MacDonald <aidanmacdonald.0x0@gmail.com>]

The AXP192 PMIC is different enough from the PMICs supported by
the AXP20x GPIO driver to warrant a separate driver. The AXP192
driver also supports interrupts and pinconf settings.

Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
---
 .../bindings/gpio/x-powers,axp192-gpio.yaml   | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/x-powers,axp192-gpio.yaml

diff --git a/Documentation/devicetree/bindings/gpio/x-powers,axp192-gpio.yaml b/Documentation/devicetree/bindings/gpio/x-powers,axp192-gpio.yaml
new file mode 100644
index 000000000000..ceb94aa2bc97
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/x-powers,axp192-gpio.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/gpio/x-powers,axp192-gpio.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: X-Powers AXP192 GPIO Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <wens@csie.org>
+
+properties:
+  compatible:
+    const: x-powers,axp192-gpio
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+    description: >
+      The first cell is the pin number and the second is the GPIO flags.
+
+  gpio-ranges:
+    maxItems: 1
+
+patternProperties:
+  "-pins$":
+    $ref: /schemas/pinctrl/pinmux-node.yaml#
+
+    properties:
+      pins:
+        items:
+          enum:
+            - GPIO0
+            - GPIO1
+            - GPIO2
+            - GPIO3
+            - GPIO4
+            - N_RSTO
+
+      function:
+        enum:
+          - output
+          - input
+          - ldo
+          - pwm
+          - adc
+          - low_output
+          - floating
+          - ext_chg_ctl
+          - ldo_status
+
+required:
+  - compatible
+  - "#gpio-cells"
+  - gpio-controller
+  - gpio-ranges
+
+additionalProperties: false
+
+examples:
+  - |
+    pinctrl0: gpio {
+        compatible = "x-powers,axp192-gpio";
+        gpio-controller;
+        #gpio-cells = <2>;
+        gpio-ranges = <&pinctrl0 0 0 6>;
+    };
-- 
2.35.1