[PATCH RFC 1/4] dt-bindings: input: document Goodix Berlin Touchscreen IC

[Neil Armstrong]

Document the Goodix GT9916 wich is part of the "Berlin" serie
of Touchscreen controllers IC from Goodix.

Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
---
 .../bindings/input/touchscreen/goodix-berlin.yaml  | 81 ++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/goodix-berlin.yaml b/Documentation/devicetree/bindings/input/touchscreen/goodix-berlin.yaml
new file mode 100644
index 000000000000..4c24a541e919
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/goodix-berlin.yaml
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/goodix-berlin.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Goodix Belin series touchscreen controller
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@xxxxxxxxxx>
+
+allOf:
+  - $ref: touchscreen.yaml#
+
+properties:
+  compatible:
+    enum:
+      - goodix,gt9916
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  avdd-supply:
+    description: Analog power supply regulator on AVDD pin
+
+  vddio-supply:
+    description: GPIO power supply regulator on VDDIO pin
+
+  spi-max-frequency: true
+  touchscreen-inverted-x: true
+  touchscreen-inverted-y: true
+  touchscreen-size-x: true
+  touchscreen-size-y: true
+  touchscreen-swapped-x-y: true
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      gt9916@5d {
+        compatible = "goodix,gt9916";
+        reg = <0x5d>;
+        interrupt-parent = <&gpio>;
+        interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
+        reset-gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
+      };
+    };
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      num-cs = <1>;
+      cs-gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
+      gt9916@0 {
+        compatible = "goodix,gt9916";
+        reg = <0>;
+        interrupt-parent = <&gpio>;
+        interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
+        reset-gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
+      };
+    };
+
+...

-- 
2.34.1