Re: [PATCH v3 3/3] dt-bindings: touchscreen: ad7877: add bindings

Add device tree bindings for the ad7877 driver.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
changes in v3:
 - use strings for polarity.
 - use unit siffix where applies.
 - add defaults where applies.
 - add complete example.
 .../input/touchscreen/adi,ad7877.yaml         | 109 ++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/touchscreen/adi,ad7877.yaml

diff --git a/Documentation/devicetree/bindings/input/touchscreen/adi,ad7877.yaml b/Documentation/devicetree/bindings/input/touchscreen/adi,ad7877.yaml
new file mode 100644
index 000000000000..7603ce63af7e
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/adi,ad7877.yaml

@@ -0,0 +1,109 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/adi,ad7877.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD7877 Touch Screen Controller
+
+maintainers:
+  - Antoniu Miclaus <antoniu.miclaus@analog.com>
+
+description: |
+  Analog Devices Touch Screen Controller
+  https://www.analog.com/media/en/technical-documentation/data-sheets/AD7877.pdf
+
+allOf:
+  - $ref: touchscreen.yaml#
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7877
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  spi-max-frequency:
+    description: AD7877 SPI bus clock frequency.
+    minimum: 10000
+    maximum: 20000000
+
+  adi,stopacq-polarity:
+    description: The polarity of the signal applied to the STOPACQ pin.
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [low, high]
+
+  adi,first-conv-delay-ns:
+    description: Delay in ns before the first conversion.
+    enum: [500, 128000, 1000000, 8000000]
+
+  adi,pen-down-acc-interval:
+    description: Enable the ADC to repeatedly perform conversions.
+                  0 = convert once
+                  1 = every 0.5 ms
+                  2 = every 1 ms
+                  3 = every 8 ms
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3]
+    default: 0