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# SPDX-License-Identifier: (GPL-
2.
0 OR BSD-
2-Clause)
%YAML
1.
2
---
$id:
http://devicetree.org/schemas/input/iqs269a.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: Azoteq IQS269A Capacitive Touch Controller
maintainers:
- Jeff LaBundy <jeff@labundy.com>
allOf:
- $ref: input.yaml#
description: |
The Azoteq IQS269A is an
8-channel capacitive touch controller that features
additional Hall-effect and inductive sensing capabilities.
Link to datasheet:
https://www.azoteq.com/
properties:
compatible:
enum:
- azoteq,iqs269a
- azoteq,iqs269a-
00
- azoteq,iqs269a-d0
reg:
maxItems:
1
interrupts:
maxItems:
1
"#address-cells":
const:
1
"#size-cells":
const:
0
azoteq,hall-enable:
type: boolean
description:
Enables Hall-effect sensing on channels
6 and
7. In this case, keycodes
assigned to channel
6 are ignored and keycodes assigned to channel
7 are
interpreted as switch codes. Refer to the datasheet for requirements im-
posed on channels
6 and
7 by Hall-effect sensing.
azoteq,suspend-mode:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
0
description: |
Specifies the power mode during suspend as follows:
0: Automatic (same as normal runtime, i.e. suspend/resume disabled)
1: Low power (all sensing at a reduced reporting rate)
2: Ultra-low power (channel
0 proximity sensing)
3: Halt (no sensing)
azoteq,clk-div:
type: boolean
description: Divides the device's core clock by a factor of
4.
azoteq,ulp-update:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
7
default:
3
description: Specifies the ultra-low-power mode update rate.
azoteq,reseed-offset:
type: boolean
description:
Applies an
8-count offset to all long-term averages upon either ATI or
reseed events.
azoteq,filt-str-lp-lta:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
0
description:
Specifies the long-term average filter strength during low-power mode.
azoteq,filt-str-lp-cnt:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
0
description:
Specifies the raw count filter strength during low-power mode.
azoteq,filt-str-np-lta:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
0
description:
Specifies the long-term average filter strength during normal-power mode.
azoteq,filt-str-np-cnt:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
0
description:
Specifies the raw count filter strength during normal-power mode.
azoteq,rate-np-ms:
minimum:
0
maximum:
255
default:
16
description: Specifies the report rate (in ms) during normal-power mode.
azoteq,rate-lp-ms:
minimum:
0
maximum:
255
default:
160
description: Specifies the report rate (in ms) during low-power mode.
azoteq,rate-ulp-ms:
multipleOf:
16
minimum:
0
maximum:
4080
default:
160
description: Specifies the report rate (in ms) during ultra-low-power mode.
azoteq,timeout-pwr-ms:
multipleOf:
512
minimum:
0
maximum:
130560
default:
2560
description:
Specifies the length of time (in ms) to wait for an event during normal-
power mode before transitioning to low-power mode.
azoteq,timeout-lta-ms:
multipleOf:
512
minimum:
0
maximum:
130560
default:
32768
description:
Specifies the length of time (in ms) to wait before resetting the long-
term average of all channels. Specify the maximum timeout to disable it
altogether.
azoteq,ati-band-disable:
type: boolean
description: Disables the ATI band check.
azoteq,ati-lp-only:
type: boolean
description: Limits automatic ATI to low-power mode.
azoteq,ati-band-tighten:
type: boolean
description: Tightens the ATI band from
1/
8 to
1/
16 of the desired target.
azoteq,filt-disable:
type: boolean
description: Disables all raw count filtering.
azoteq,gpio3-select:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
7
default:
0
description:
Selects the channel for which the GPIO3 pin represents touch state.
azoteq,dual-direction:
type: boolean
description:
Specifies that long-term averages are to freeze in the presence of either
increasing or decreasing counts, thereby permitting events to be reported
in either direction.
azoteq,tx-freq:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
0
description: |
Specifies the inductive sensing excitation frequency as follows (paren-
thesized numbers represent the frequency if 'azoteq,clk-div' is present):
0:
16 MHz (
4 MHz)
1:
8 MHz (
2 MHz)
2:
4 MHz (
1 MHz)
3:
2 MHz (
500 kHz)
azoteq,global-cap-increase:
type: boolean
description: Increases the global capacitance adder from
0.
5 pF to
1.
5 pF.
azoteq,reseed-select:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
0
description: |
Specifies the event(s) that prompt the device to reseed (i.e. reset the
long-term average) of an associated channel as follows:
0: None
1: Proximity
2: Proximity or touch
3: Proximity, touch or deep touch
azoteq,tracking-enable:
type: boolean
description:
Enables all associated channels to track their respective reference
channels.
azoteq,filt-str-slider:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
1
description: Specifies the slider coordinate filter strength.
azoteq,touch-hold-ms:
multipleOf:
256
minimum:
256
maximum:
65280
default:
5120
description:
Specifies the length of time (in ms) for which the channel selected by
'azoteq,gpio3-select' must be held in a state of touch in order for an
approximately
60-ms pulse to be asserted on the GPIO4 pin.
linux,keycodes:
minItems:
1
maxItems:
8
description: |
Specifies the numeric keycodes associated with each available gesture in
the following order (enter
0 for unused gestures):
0: Slider
0 tap
1: Slider
0 hold
2: Slider
0 positive flick or swipe
3: Slider
0 negative flick or swipe
4: Slider
1 tap
5: Slider
1 hold
6: Slider
1 positive flick or swipe
7: Slider
1 negative flick or swipe
azoteq,gesture-swipe:
type: boolean
description:
Directs the device to interpret axial gestures as a swipe (finger remains
on slider) instead of a flick (finger leaves slider).
azoteq,timeout-tap-ms:
multipleOf:
16
minimum:
0
maximum:
4080
default:
400
description:
Specifies the length of time (in ms) within which a slider touch must be
released in order to be interpreted as a tap. Default and maximum values
as well as step size are reduced by a factor of
4 with device version
2.
azoteq,timeout-swipe-ms:
multipleOf:
16
minimum:
0
maximum:
4080
default:
2000
description:
Specifies the length of time (in ms) within which an axial gesture must be
completed in order to be interpreted as a flick or swipe. Default and max-
imum values as well as step size are reduced by a factor of
4 with device
version
2.
azoteq,thresh-swipe:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
255
default:
128
description:
Specifies the number of points across which an axial gesture must travel
in order to be interpreted as a flick or swipe.
dependencies:
azoteq,gesture-swipe: ["linux,keycodes"]
azoteq,timeout-tap-ms: ["linux,keycodes"]
azoteq,timeout-swipe-ms: ["linux,keycodes"]
azoteq,thresh-swipe: ["linux,keycodes"]
patternProperties:
"^channel@[
0-
7]$":
type: object
description:
Represents a single sensing channel. A channel is active if defined and
inactive otherwise.
properties:
reg:
minimum:
0
maximum:
7
description: Index of the channel.
azoteq,reseed-disable:
type: boolean
description:
Prevents the channel from being reseeded if the long-term average
timeout (defined in 'azoteq,timeout-lta') expires.
azoteq,blocking-enable:
type: boolean
description: Specifies that the channel is a blocking channel.
azoteq,slider0-select:
type: boolean
description: Specifies that the channel participates in slider
0.
azoteq,slider1-select:
type: boolean
description: Specifies that the channel participates in slider
1.
azoteq,rx-enable:
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems:
1
maxItems:
8
items:
minimum:
0
maximum:
7
description:
Specifies the CRX pin(s) associated with the channel. By default, only
the CRX pin corresponding to the channel's index is enabled (e.g. CRX0
for channel
0).
azoteq,tx-enable:
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems:
1
maxItems:
8
items:
minimum:
0
maximum:
7
default: [
0,
1,
2,
3,
4,
5,
6,
7]
description: Specifies the TX pin(s) associated with the channel.
azoteq,meas-cap-decrease:
type: boolean
description:
Decreases the internal measurement capacitance from
60 pF to
15 pF.
azoteq,rx-float-inactive:
type: boolean
description: Floats any inactive CRX pins instead of grounding them.
azoteq,local-cap-size:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2]
default:
0
description: |
Specifies the capacitance to be added to the channel as follows:
0: None
1: Global adder (based on 'azoteq,global-cap-increase')
2: Global adder +
0.
5 pF
azoteq,invert-enable:
type: boolean
description:
Inverts the polarity of the states reported for proximity, touch and
deep-touch events relative to their respective thresholds.
azoteq,proj-bias:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
2
description: |
Specifies the bias current applied during projected-capacitance
sensing as follows:
0:
2.
5 uA
1:
5 uA
2:
10 uA
3:
20 uA
azoteq,sense-mode:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
9,
14,
15]
default:
0
description: |
Specifies the channel's sensing mode as follows:
0: Self capacitance
1: Projected capacitance
9: Self or mutual inductance
14: Hall effect
15: Temperature
azoteq,sense-freq:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
1
description: |
Specifies the channel's sensing frequency as follows (parenthesized
numbers represent the frequency if 'azoteq,clk-div' is present):
0:
4 MHz (
1 MHz)
1:
2 MHz (
500 kHz)
2:
1 MHz (
250 kHz)
3:
500 kHz (
125 kHz)
azoteq,static-enable:
type: boolean
description: Enables the static front-end for the channel.
azoteq,ati-mode:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
0,
1,
2,
3]
default:
3
description: |
Specifies the channel's ATI mode as follows:
0: Disabled
1: Semi-partial
2: Partial
3: Full
azoteq,ati-base:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [
75,
100,
150,
200]
default:
100
description: Specifies the channel's ATI base.
azoteq,ati-target:
$ref: /schemas/types.yaml#/definitions/uint32
multipleOf:
32
minimum:
0
maximum:
2016
default:
512
description: Specifies the channel's ATI target.
azoteq,assoc-select:
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems:
1
maxItems:
8
items:
minimum:
0
maximum:
7
description:
Specifies the associated channels for which the channel serves as a
reference channel. By default, no channels are selected.
azoteq,assoc-weight:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
255
default:
0
description:
Specifies the channel's impact weight if it acts as an associated
channel (
0 =
0% impact,
255 =
200% impact).
patternProperties:
"^event-prox(-alt)?$":
type: object
$ref: input.yaml#
description:
Represents a proximity event reported by the channel in response to
a decrease in counts. Node names suffixed with '-alt' instead corre-
spond to an increase in counts.
By default, the long-term average tracks an increase in counts such
that only events corresponding to a decrease in counts are reported
(refer to the datasheet for more information).
Specify 'azoteq,dual-direction' to freeze the long-term average when
the counts increase or decrease such that events of either direction
can be reported. Alternatively, specify 'azoteq,invert-enable' to in-
vert the polarity of the states reported by the channel.
Complementary events (e.g. event-touch and event-touch-alt) can both
be present and specify different key or switch codes, but not differ-
ent thresholds or hysteresis (if applicable).
properties:
azoteq,thresh:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
255
default:
10
description: Specifies the threshold for the event.
linux,code: true
additionalProperties: false
"^event-touch(-alt)?$":
type: object
$ref: input.yaml#
description: Represents a touch event reported by the channel.
properties:
azoteq,thresh:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
255
default:
8
description: Specifies the threshold for the event.
azoteq,hyst:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
15
default:
4
description: Specifies the hysteresis for the event.
linux,code: true
additionalProperties: false
"^event-deep(-alt)?$":
type: object
$ref: input.yaml#
description: Represents a deep-touch event reported by the channel.
properties:
azoteq,thresh:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
255
default:
26
description: Specifies the threshold for the event.
azoteq,hyst:
$ref: /schemas/types.yaml#/definitions/uint32
minimum:
0
maximum:
15
default:
0
description: Specifies the hysteresis for the event.
linux,code: true
additionalProperties: false
required:
- reg
additionalProperties: false
if:
properties:
compatible:
contains:
enum:
- azoteq,iqs269a-d0
then:
patternProperties:
"^channel@[
0-
7]$":
properties:
azoteq,slider1-select: false
else:
properties:
azoteq,touch-hold-ms: false
required:
- compatible
- reg
- interrupts
- "#address-cells"
- "#size-cells"
additionalProperties: false
examples:
- |
#include <dt-bindings/input/input.h>
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <
1>;
#size-cells = <
0>;
touch@
44 {
#address-cells = <
1>;
#size-cells = <
0>;
compatible = "azoteq,iqs269a";
reg = <
0x44>;
interrupt-parent = <&gpio>;
interrupts = <
17 IRQ_TYPE_LEVEL_LOW>;
azoteq,hall-enable;
azoteq,suspend-mode = <
2>;
linux,keycodes = <KEY_PLAYPAUSE>,
<KEY_STOPCD>,
<KEY_NEXTSONG>,
<KEY_PREVIOUSSONG>;
azoteq,timeout-tap-ms = <
400>;
azoteq,timeout-swipe-ms = <
800>;
channel@
0 {
reg = <
0x0>;
event-prox {
linux,code = <KEY_POWER>;
};
};
channel@
1 {
reg = <
0x1>;
azoteq,slider0-select;
};
channel@
2 {
reg = <
0x2>;
azoteq,slider0-select;
};
channel@
3 {
reg = <
0x3>;
azoteq,slider0-select;
};
channel@
4 {
reg = <
0x4>;
azoteq,slider0-select;
};
channel@
5 {
reg = <
0x5>;
azoteq,slider0-select;
};
channel@
6 {
reg = <
0x6>;
azoteq,invert-enable;
azoteq,static-enable;
azoteq,reseed-disable;
azoteq,rx-enable = <
0>;
azoteq,sense-freq = <
0x0>;
azoteq,sense-mode = <
0xE>;
azoteq,ati-mode = <
0x0>;
azoteq,ati-base = <
200>;
azoteq,ati-target = <
320>;
};
channel@
7 {
reg = <
0x7>;
azoteq,invert-enable;
azoteq,static-enable;
azoteq,reseed-disable;
azoteq,rx-enable = <
0>, <
6>;
azoteq,sense-freq = <
0x0>;
azoteq,sense-mode = <
0xE>;
azoteq,ati-mode = <
0x3>;
azoteq,ati-base = <
200>;
azoteq,ati-target = <
320>;
event-touch {
linux,code = <SW_LID>;
};
};
};
};
...
