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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
26 lines, or tx/rx). Mutual Capacitance measured is at the nodes where the
27 conductors cross. Alternatively, Self Capacitance measures the signal from each
30 A touch input may be determined by comparing the raw capacitance measurement to
31 a no-touch reference (or "baseline") measurement:
33 Delta = Raw - Reference
35 The reference measurement takes account of variations in the capacitance across
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/linux-6.12.1/Documentation/devicetree/bindings/input/
Diqs626a.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
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":
37 azoteq,suspend-mode:
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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#
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
26 - azoteq,iqs269a-d0
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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#
10 - Jeff LaBundy <jeff@labundy.com>
21 - azoteq,iqs7222a
22 - azoteq,iqs7222b
23 - azoteq,iqs7222c
24 - azoteq,iqs7222d
29 irq-gpios:
32 Specifies the GPIO connected to the device's active-low RDY output.
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/linux-6.12.1/Documentation/devicetree/bindings/input/touchscreen/
Dazoteq,iqs5xx.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jeff LaBundy <jeff@labundy.com>
14 employ projected-capacitance sensing and can track up to five independent
20 - $ref: touchscreen.yaml#
25 - azoteq,iqs550
26 - azoteq,iqs572
27 - azoteq,iqs525
35 reset-gpios:
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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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