summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml')
-rw-r--r--Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml86
1 files changed, 86 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml
new file mode 100644
index 000000000000..7fc22a403d48
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/resistive-adc-touch.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic resistive touchscreen ADC
+
+maintainers:
+ - Oleksij Rempel <o.rempel@pengutronix.de>
+
+description: |
+ Generic ADC based resistive touchscreen controller
+ The device must be connected to an ADC device that provides channels for
+ position measurement and optional pressure.
+
+allOf:
+ - $ref: touchscreen.yaml#
+
+properties:
+ compatible:
+ const: resistive-adc-touch
+
+ io-channels:
+ minItems: 2
+ items:
+ - description: x
+ - description: y
+ - description: pressure (optional)
+ - description: z1 (optional)
+ - description: z2 (optional)
+
+ io-channel-names:
+ oneOf:
+ - items:
+ - enum: [x, y]
+ - enum: [x, y]
+ - items:
+ - enum: [x, y, pressure]
+ - enum: [x, y, pressure]
+ - enum: [x, y, pressure]
+ - items:
+ - enum: [x, y, z1, z2]
+ - enum: [x, y, z1, z2]
+ - enum: [x, y, z1, z2]
+ - enum: [x, y, z1, z2]
+
+ touchscreen-size-x: true
+ touchscreen-size-y: true
+ touchscreen-fuzz-x: true
+ touchscreen-fuzz-y: true
+ touchscreen-inverted-x: true
+ touchscreen-inverted-y: true
+ touchscreen-swapped-x-y: true
+ touchscreen-min-pressure: true
+ touchscreen-x-plate-ohms: true
+
+additionalProperties: false
+
+required:
+ - compatible
+ - io-channels
+ - io-channel-names
+
+examples:
+ - |
+ touchscreen {
+ compatible = "resistive-adc-touch";
+ io-channels = <&adc 24>, <&adc 25>;
+ io-channel-names = "y", "x";
+ };
+ - |
+ touchscreen {
+ compatible = "resistive-adc-touch";
+ touchscreen-min-pressure = <50000>;
+ io-channels = <&adc 24>, <&adc 25>, <&adc 26>;
+ io-channel-names = "y", "pressure", "x";
+ };
+ - |
+ touchscreen {
+ compatible = "resistive-adc-touch";
+ touchscreen-min-pressure = <50000>;
+ io-channels = <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>;
+ io-channel-names = "x", "z1", "z2", "y";
+ touchscreen-x-plate-ohms = <800>;
+ };