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/linux-6.12.1/Documentation/userspace-api/media/v4l/
Ddev-touch.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
10 ``/dev/v4l-touch0`` to ``/dev/v4l-touch255`` with major number 81 and
16 Sensors may be Optical, or Projected Capacitive touch (PCT).
20 side-channel for diagnostics or tuning. In other systems, the ASIC is a simple
24 For capacitive touch sensing, the touchscreen is composed of an array of
27 conductors cross. Alternatively, Self Capacitance measures the signal from each
31 a no-touch reference (or "baseline") measurement:
33 Delta = Raw - Reference
51 :ref:`Touch Formats <tch-formats>`.
/linux-6.12.1/Documentation/devicetree/bindings/input/touchscreen/
Dazoteq,iqs7211.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jeff LaBundy <jeff@labundy.com>
13 The Azoteq IQS7210A, IQS7211A and IQS7211E trackpad and touchscreen control-
14 lers employ projected-capacitance sensing and can track two contacts.
21 - azoteq,iqs7210a
22 - azoteq,iqs7211a
23 - azoteq,iqs7211e
28 irq-gpios:
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/linux-6.12.1/Documentation/devicetree/bindings/input/
Diqs62x-keys.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/input/iqs62x-keys.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jeff LaBundy <jeff@labundy.com>
13 - $ref: input.yaml#
16 The Azoteq IQS620A, IQS621, IQS622, IQS624 and IQS625 multi-function sensors
17 feature a variety of self-capacitive, mutual-inductive and Hall-effect sens-
23 further details and examples. Sensor hardware configuration (self-capacitive
24 vs. mutual-inductive, etc.) is selected based on the device's firmware.
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Diqs269a.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Azoteq IQS269A Capacitive Touch Controller
10 - Jeff LaBundy <jeff@labundy.com>
13 - $ref: input.yaml#
16 The Azoteq IQS269A is an 8-channel capacitive touch controller that features
17 additional Hall-effect and inductive sensing capabilities.
24 - azoteq,iqs269a
25 - azoteq,iqs269a-00
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Dazoteq,iqs7222.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Azoteq IQS7222A/B/C/D Capacitive Touch Controller
10 - Jeff LaBundy <jeff@labundy.com>
14 capacitive touch controllers that feature additional sensing capabilities.
21 - azoteq,iqs7222a
22 - azoteq,iqs7222b
23 - azoteq,iqs7222c
24 - azoteq,iqs7222d
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Diqs626a.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Azoteq IQS626A Capacitive Touch Controller
10 - Jeff LaBundy <jeff@labundy.com>
13 The Azoteq IQS626A is a 14-channel capacitive touch controller that features
14 additional Hall-effect and inductive sensing capabilities.
19 - $ref: touchscreen/touchscreen.yaml#
31 "#address-cells":
34 "#size-cells":
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