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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/touchscreen/fsl,imx6ul-tsc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale i.MX6UL Touch Controller
maintainers:
- Haibo Chen <haibo.chen@nxp.com>
- Shawn Guo <shawnguo@kernel.org>
- Sascha Hauer <s.hauer@pengutronix.de>
properties:
compatible:
const: fsl,imx6ul-tsc
reg:
items:
- description: touch controller address
- description: ADC2 address
interrupts:
items:
- description: touch controller address
- description: ADC2 address
clocks:
maxItems: 2
clock-names:
items:
- const: tsc
- const: adc
xnur-gpios:
maxItems: 1
description:
The X- gpio this controller connect to. This xnur-gpio returns to
low once the finger leave the touch screen (The last touch event
the touch controller capture).
measure-delay-time:
$ref: /schemas/types.yaml#/definitions/uint32
description:
The value of measure delay time. Before X-axis or Y-axis measurement,
the screen need some time before even potential distribution ready.
default: 0xffff
minimum: 0
maximum: 0xffffff
pre-charge-time:
$ref: /schemas/types.yaml#/definitions/uint32
description:
The touch screen need some time to precharge.
default: 0xfff
minimum: 0
maximum: 0xffffffff
touchscreen-average-samples:
$ref: /schemas/types.yaml#/definitions/uint32
description: Number of data samples which are averaged for each read.
enum: [ 1, 4, 8, 16, 32 ]
debounce-delay-us:
description: |
Minimum duration in microseconds a signal must remain stable
to be considered valid.
Drivers must convert this value to IPG clock cycles and map
it to one of the four discrete thresholds exposed by the
TSC_DEBUG_MODE2 register:
0: 8191 IPG cycles
1: 4095 IPG cycles
2: 2047 IPG cycles
3: 1023 IPG cycles
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
- xnur-gpios
allOf:
- $ref: touchscreen.yaml#
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/imx6ul-clock.h>
#include <dt-bindings/gpio/gpio.h>
touchscreen@2040000 {
compatible = "fsl,imx6ul-tsc";
reg = <0x02040000 0x4000>, <0x0219c000 0x4000>;
interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_IPG>,
<&clks IMX6UL_CLK_ADC2>;
clock-names = "tsc", "adc";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_tsc>;
xnur-gpios = <&gpio1 3 GPIO_ACTIVE_LOW>;
measure-delay-time = <0xfff>;
pre-charge-time = <0xffff>;
touchscreen-average-samples = <32>;
};
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