Input: atmel_mxt_ts - convert bindings to YAML and extend
This converts the Armel MXT touchscreen bindings to YAML format and extends them with the following two properties: - vdda-supply: the optional analog supply voltage - vdd-supply: the optional digital supply voltage Tested the schema with all in-tree users and they verify fine. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20201104153032.1387747-2-linus.walleij@linaro.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Linus Walleij
Dmitry Torokhov
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Atmel maXTouch touchscreen/touchpad
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Required properties:
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- compatible:
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atmel,maxtouch
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The following compatibles have been used in various products but are
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deprecated:
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atmel,qt602240_ts
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atmel,atmel_mxt_ts
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atmel,atmel_mxt_tp
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atmel,mXT224
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- reg: The I2C address of the device
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- interrupts: The sink for the touchpad's IRQ output
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See ../interrupt-controller/interrupts.txt
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Optional properties for main touchpad device:
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- linux,gpio-keymap: When enabled, the SPT_GPIOPWN_T19 object sends messages
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on GPIO bit changes. An array of up to 8 entries can be provided
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indicating the Linux keycode mapped to each bit of the status byte,
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starting at the LSB. Linux keycodes are defined in
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<dt-bindings/input/input.h>.
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Note: the numbering of the GPIOs and the bit they start at varies between
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maXTouch devices. You must either refer to the documentation, or
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experiment to determine which bit corresponds to which input. Use
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KEY_RESERVED for unused padding values.
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- reset-gpios: GPIO specifier for the touchscreen's reset pin (active low)
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Example:
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touch@4b {
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compatible = "atmel,maxtouch";
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reg = <0x4b>;
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interrupt-parent = <&gpio>;
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interrupts = <TEGRA_GPIO(W, 3) IRQ_TYPE_LEVEL_LOW>;
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};
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@ -0,0 +1,81 @@
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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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$id: http://devicetree.org/schemas/input/atmel,maxtouch.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Atmel maXTouch touchscreen/touchpad
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maintainers:
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- Nick Dyer <nick@shmanahar.org>
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- Linus Walleij <linus.walleij@linaro.org>
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description: |
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Atmel maXTouch touchscreen or touchpads such as the mXT244
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and similar devices.
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properties:
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compatible:
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const: atmel,maxtouch
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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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vdda-supply:
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description:
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Optional regulator for the AVDD analog voltage.
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vdd-supply:
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description:
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Optional regulator for the VDD digital voltage.
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reset-gpios:
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maxItems: 1
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description:
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Optional GPIO specifier for the touchscreen's reset pin
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(active low). The line must be flagged with
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GPIO_ACTIVE_LOW.
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linux,gpio-keymap:
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$ref: /schemas/types.yaml#/definitions/uint32-array
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description: |
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When enabled, the SPT_GPIOPWN_T19 object sends messages
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on GPIO bit changes. An array of up to 8 entries can be provided
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indicating the Linux keycode mapped to each bit of the status byte,
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starting at the LSB. Linux keycodes are defined in
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<dt-bindings/input/input.h>.
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Note: the numbering of the GPIOs and the bit they start at varies
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between maXTouch devices. You must either refer to the documentation,
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or experiment to determine which bit corresponds to which input. Use
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KEY_RESERVED for unused padding values.
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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/interrupt-controller/irq.h>
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#include <dt-bindings/gpio/gpio.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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touchscreen@4a {
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compatible = "atmel,maxtouch";
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reg = <0x4a>;
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interrupt-parent = <&gpio>;
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interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
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reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
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vdda-supply = <&ab8500_ldo_aux2_reg>;
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vdd-supply = <&ab8500_ldo_aux5_reg>;
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};
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};
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...
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@ -2980,7 +2980,7 @@ ATMEL MAXTOUCH DRIVER
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M: Nick Dyer <nick@shmanahar.org>
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S: Maintained
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T: git git://github.com/ndyer/linux.git
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F: Documentation/devicetree/bindings/input/atmel,maxtouch.txt
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F: Documentation/devicetree/bindings/input/atmel,maxtouch.yaml
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F: drivers/input/touchscreen/atmel_mxt_ts.c
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ATMEL WIRELESS DRIVER
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