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dt-bindings: input: Convert ChipOne ICN8318 binding to a schema

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The ChipOne ICN8318 Touchscreen Controller is supported by Linux thanks
to its device tree binding.

Now that we have the DT validation in place, let's convert the device
tree bindings for that driver over to a YAML schema.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210721140424.725744-17-maxime@cerno.tech
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Maxime Ripard 2021-07-23 17:34:07 -07:00 committed by Dmitry Torokhov
parent 5af9f79b41
commit 04647773d6
2 changed files with 62 additions and 44 deletions
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62
Documentation/devicetree/bindings/input/touchscreen/chipone,icn8318.yaml Normal file
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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/touchscreen/chipone,icn8318.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ChipOne ICN8318 Touchscreen Controller Device Tree Bindings
maintainers:
- Dmitry Torokhov <dmitry.torokhov@gmail.com>
allOf:
- $ref: touchscreen.yaml#
properties:
compatible:
const: chipone,icn8318
reg:
maxItems: 1
interrupts:
maxItems: 1
wake-gpios:
maxItems: 1
unevaluatedProperties: false
required:
- compatible
- reg
- interrupts
- wake-gpios
- touchscreen-size-x
- touchscreen-size-y
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
touchscreen@40 {
compatible = "chipone,icn8318";
reg = <0x40>;
interrupt-parent = <&pio>;
interrupts = <9 IRQ_TYPE_EDGE_FALLING>; /* EINT9 (PG9) */
pinctrl-names = "default";
pinctrl-0 = <&ts_wake_pin_p66>;
wake-gpios = <&pio 1 3 GPIO_ACTIVE_HIGH>; /* PB3 */
touchscreen-size-x = <800>;
touchscreen-size-y = <480>;
touchscreen-inverted-x;
touchscreen-swapped-x-y;
};
};
...

44
Documentation/devicetree/bindings/input/touchscreen/chipone_icn8318.txt
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* ChipOne icn8318 I2C touchscreen controller
Required properties:
- compatible : "chipone,icn8318"
- reg : I2C slave address of the chip (0x40)
- interrupts : interrupt specification for the icn8318 interrupt
- wake-gpios : GPIO specification for the WAKE input
- touchscreen-size-x : horizontal resolution of touchscreen (in pixels)
- touchscreen-size-y : vertical resolution of touchscreen (in pixels)
Optional properties:
- pinctrl-names : should be "default"
- pinctrl-0: : a phandle pointing to the pin settings for the
control gpios
- touchscreen-fuzz-x : horizontal noise value of the absolute input
device (in pixels)
- touchscreen-fuzz-y : vertical noise value of the absolute input
device (in pixels)
- touchscreen-inverted-x : X axis is inverted (boolean)
- touchscreen-inverted-y : Y axis is inverted (boolean)
- touchscreen-swapped-x-y : X and Y axis are swapped (boolean)
Swapping is done after inverting the axis
Example:
i2c@00000000 {
/* ... */
chipone_icn8318@40 {
compatible = "chipone,icn8318";
reg = <0x40>;
interrupt-parent = <&pio>;
interrupts = <9 IRQ_TYPE_EDGE_FALLING>; /* EINT9 (PG9) */
pinctrl-names = "default";
pinctrl-0 = <&ts_wake_pin_p66>;
wake-gpios = <&pio 1 3 GPIO_ACTIVE_HIGH>; /* PB3 */
touchscreen-size-x = <800>;
touchscreen-size-y = <480>;
touchscreen-inverted-x;
touchscreen-swapped-x-y;
};
/* ... */
};