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Diffstat (limited to 'Documentation/devicetree/bindings/input/atmel,maxtouch.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/input/atmel,maxtouch.yaml | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml b/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml new file mode 100644 index 000000000000..8c6418f76e94 --- /dev/null +++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml @@ -0,0 +1,81 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/atmel,maxtouch.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Atmel maXTouch touchscreen/touchpad + +maintainers: + - Nick Dyer <nick@shmanahar.org> + - Linus Walleij <linus.walleij@linaro.org> + +description: | + Atmel maXTouch touchscreen or touchpads such as the mXT244 + and similar devices. + +properties: + compatible: + const: atmel,maxtouch + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + vdda-supply: + description: + Optional regulator for the AVDD analog voltage. + + vdd-supply: + description: + Optional regulator for the VDD digital voltage. + + reset-gpios: + maxItems: 1 + description: + Optional GPIO specifier for the touchscreen's reset pin + (active low). The line must be flagged with + GPIO_ACTIVE_LOW. + + linux,gpio-keymap: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: | + When enabled, the SPT_GPIOPWN_T19 object sends messages + on GPIO bit changes. An array of up to 8 entries can be provided + indicating the Linux keycode mapped to each bit of the status byte, + starting at the LSB. Linux keycodes are defined in + <dt-bindings/input/input.h>. + + Note: the numbering of the GPIOs and the bit they start at varies + between maXTouch devices. You must either refer to the documentation, + or experiment to determine which bit corresponds to which input. Use + KEY_RESERVED for unused padding values. + +required: + - compatible + - reg + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/gpio/gpio.h> + i2c { + #address-cells = <1>; + #size-cells = <0>; + touchscreen@4a { + compatible = "atmel,maxtouch"; + reg = <0x4a>; + interrupt-parent = <&gpio>; + interrupts = <26 IRQ_TYPE_EDGE_FALLING>; + reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>; + vdda-supply = <&ab8500_ldo_aux2_reg>; + vdd-supply = <&ab8500_ldo_aux5_reg>; + }; + }; + +... |