31a10f5b4b
Convert the device tree bindings for tm2-touchkey to the YAML format. While we're at it, clarify the descriptions a bit to make it clear that this driver can be used for many different MCUs that all implement a similar I2C protocol. Depending on the MCU the voltage requirements may be different, on some devices the controller uses 2.2V, 2.8V or even 3.3V for vcc-supply instead of 1.8V. Signed-off-by: Stephan Gerhold <stephan@gerhold.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20201203131242.44397-1-stephan@gerhold.net Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
69 lines
1.5 KiB
YAML
69 lines
1.5 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/cypress,tm2-touchkey.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Samsung TM2 touch key controller
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maintainers:
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- Stephan Gerhold <stephan@gerhold.net>
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description: |
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Touch key controllers similar to the TM2 can be found in a wide range of
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Samsung devices. They are implemented using many different MCUs, but use
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a similar I2C protocol.
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allOf:
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- $ref: input.yaml#
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properties:
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compatible:
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enum:
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- cypress,tm2-touchkey
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- cypress,midas-touchkey
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- cypress,aries-touchkey
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- coreriver,tc360-touchkey
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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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vdd-supply:
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description: Optional regulator for LED voltage, 3.3V.
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vcc-supply:
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description: Optional regulator for MCU, 1.8V-3.3V (depending on MCU).
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linux,keycodes:
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minItems: 1
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maxItems: 4
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required:
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- compatible
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- reg
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- interrupts
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/input/input.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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touchkey@20 {
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compatible = "cypress,tm2-touchkey";
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reg = <0x20>;
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interrupt-parent = <&gpa3>;
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interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
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vcc-supply = <&ldo32_reg>;
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vdd-supply = <&ldo33_reg>;
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linux,keycodes = <KEY_MENU KEY_BACK>;
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};
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};
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