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dt-bindings: input: touchscreen: convert fsl-mx25-tcq.txt to yaml
Convert fsl-mx25-tcq.txt to yaml.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260211-yaml_mfd-v1-1-05cb48bc6f09@nxp.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
authored by
Frank Li
and committed by
Rob Herring (Arm)
c1bf6571
15cfc898
+69
-34
+69
Documentation/devicetree/bindings/input/touchscreen/fsl,imx25-tcq.yaml
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Documentation/devicetree/bindings/input/touchscreen/fsl,imx25-tcq.yaml
···
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/touchscreen/fsl,imx25-tcq.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Freescale mx25 TS conversion queue module
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maintainers:
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- Frank Li <Frank.Li@nxp.com>
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description:
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mx25 touchscreen conversion queue module which controls the ADC unit of the
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mx25 for attached touchscreens.
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properties:
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compatible:
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const: fsl,imx25-tcq
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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fsl,wires:
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description: touch wires number.
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [4, 5]
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fsl,pen-debounce-ns:
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description:
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Pen debounce time in nanoseconds.
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fsl,pen-threshold:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Pen-down threshold for the touchscreen. This is a value
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between 1 and 4096. It is the ratio between the internal reference voltage
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and the measured voltage after the plate was precharged. Resistance between
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plates and therefore the voltage decreases with pressure so that a smaller
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value is equivalent to a higher pressure.
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fsl,settling-time-ns:
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description:
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Settling time in nanoseconds. The settling time is before
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the actual touch detection to wait for an even charge distribution in the
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plate.
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allOf:
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- $ref: touchscreen.yaml
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required:
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- compatible
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- reg
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- interrupts
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- fsl,wires
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unevaluatedProperties: false
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examples:
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- |
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touchscreen@50030400 {
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compatible = "fsl,imx25-tcq";
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reg = <0x50030400 0x60>;
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interrupt-parent = <&tscadc>;
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interrupts = <0>;
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fsl,wires = <4>;
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};
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Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt
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Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt
···
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Freescale mx25 TS conversion queue module
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mx25 touchscreen conversion queue module which controls the ADC unit of the
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mx25 for attached touchscreens.
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-
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Required properties:
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- compatible: Should be "fsl,imx25-tcq".
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- reg: Memory range of the device.
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- interrupts: Should be the interrupt number associated with this module within
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the tscadc unit (<0>).
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- fsl,wires: Should be '<4>' or '<5>'
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-
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Optional properties:
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- fsl,pen-debounce-ns: Pen debounce time in nanoseconds.
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- fsl,pen-threshold: Pen-down threshold for the touchscreen. This is a value
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between 1 and 4096. It is the ratio between the internal reference voltage
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and the measured voltage after the plate was precharged. Resistance between
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plates and therefore the voltage decreases with pressure so that a smaller
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value is equivalent to a higher pressure.
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- fsl,settling-time-ns: Settling time in nanoseconds. The settling time is before
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the actual touch detection to wait for an even charge distribution in the
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plate.
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This device includes two conversion queues which can be added as subnodes.
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The first queue is for the touchscreen, the second for general purpose ADC.
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Example:
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tsc: tcq@50030400 {
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compatible = "fsl,imx25-tcq";
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reg = <0x50030400 0x60>;
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interrupt-parent = <&tscadc>;
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interrupts = <0>;
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fsl,wires = <4>;
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};