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dt-bindings: touchscreen: Add touchscreen schema
Add touchscreen schema for common properties Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20200108091118.5130-2-benjamin.gaignard@st.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Benjamin Gaignard
Dmitry Torokhov
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General Touchscreen Properties:
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Optional properties for Touchscreens:
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- touchscreen-min-x : minimum x coordinate reported (0 if not set)
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- touchscreen-min-y : minimum y coordinate reported (0 if not set)
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- touchscreen-size-x : horizontal resolution of touchscreen
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(maximum x coordinate reported + 1)
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- touchscreen-size-y : vertical resolution of touchscreen
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(maximum y coordinate reported + 1)
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- touchscreen-max-pressure : maximum reported pressure (arbitrary range
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dependent on the controller)
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- touchscreen-min-pressure : minimum pressure on the touchscreen to be
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achieved in order for the touchscreen
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driver to report a touch event.
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- touchscreen-fuzz-x : horizontal noise value of the absolute input
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device (in pixels)
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- touchscreen-fuzz-y : vertical noise value of the absolute input
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device (in pixels)
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- touchscreen-fuzz-pressure : pressure noise value of the absolute input
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device (arbitrary range dependent on the
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controller)
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- touchscreen-average-samples : Number of data samples which are averaged
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for each read (valid values dependent on the
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controller)
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- touchscreen-inverted-x : X axis is inverted (boolean)
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- touchscreen-inverted-y : Y axis is inverted (boolean)
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- touchscreen-swapped-x-y : X and Y axis are swapped (boolean)
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Swapping is done after inverting the axis
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- touchscreen-x-mm : horizontal length in mm of the touchscreen
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- touchscreen-y-mm : vertical length in mm of the touchscreen
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Deprecated properties for Touchscreens:
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- x-size : deprecated name for touchscreen-size-x
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- y-size : deprecated name for touchscreen-size-y
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- moving-threshold : deprecated name for a combination of
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touchscreen-fuzz-x and touchscreen-fuzz-y
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- contact-threshold : deprecated name for touchscreen-fuzz-pressure
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- x-invert : deprecated name for touchscreen-inverted-x
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- y-invert : deprecated name for touchscreen-inverted-y
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See touchscreen.yaml
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@ -0,0 +1,83 @@
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/touchscreen/touchscreen.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Common touchscreen Bindings
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maintainers:
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- Dmitry Torokhov <dmitry.torokhov@gmail.com>
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properties:
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touchscreen-min-x:
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description: minimum x coordinate reported
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 0
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touchscreen-min-y:
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description: minimum y coordinate reported
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 0
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touchscreen-size-x:
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description: horizontal resolution of touchscreen (maximum x coordinate reported + 1)
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-size-y:
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description: vertical resolution of touchscreen (maximum y coordinate reported + 1)
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-max-pressure:
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description: maximum reported pressure (arbitrary range dependent on the controller)
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-min-pressure:
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description: minimum pressure on the touchscreen to be achieved in order for the
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touchscreen driver to report a touch event.
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-fuzz-x:
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description: horizontal noise value of the absolute input device (in pixels)
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-fuzz-y:
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description: vertical noise value of the absolute input device (in pixels)
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-fuzz-pressure:
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description: pressure noise value of the absolute input device (arbitrary range
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dependent on the controller)
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-average-samples:
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description: Number of data samples which are averaged for each read (valid values
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dependent on the controller)
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-inverted-x:
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description: X axis is inverted
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type: boolean
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touchscreen-inverted-y:
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description: Y axis is inverted
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type: boolean
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touchscreen-swapped-x-y:
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description: X and Y axis are swapped
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Swapping is done after inverting the axis
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type: boolean
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touchscreen-x-mm:
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description: horizontal length in mm of the touchscreen
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$ref: /schemas/types.yaml#/definitions/uint32
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touchscreen-y-mm:
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description: vertical length in mm of the touchscreen
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$ref: /schemas/types.yaml#/definitions/uint32
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dependencies:
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touchscreen-size-x: [ touchscreen-size-y ]
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touchscreen-size-y: [ touchscreen-size-x ]
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touchscreen-x-mm: [ touchscreen-y-mm ]
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touchscreen-y-mm: [ touchscreen-x-mm ]
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