1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/input/touchscreen/azoteq,iqs7211.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Azoteq IQS7210A/7211A/E Trackpad/Touchscreen Controller
8
9maintainers:
10  - Jeff LaBundy <jeff@labundy.com>
11
12description: |
13  The Azoteq IQS7210A, IQS7211A and IQS7211E trackpad and touchscreen control-
14  lers employ projected-capacitance sensing and can track two contacts.
15
16  Link to datasheets: https://www.azoteq.com/
17
18properties:
19  compatible:
20    enum:
21      - azoteq,iqs7210a
22      - azoteq,iqs7211a
23      - azoteq,iqs7211e
24
25  reg:
26    maxItems: 1
27
28  irq-gpios:
29    maxItems: 1
30    description:
31      Specifies the GPIO connected to the device's active-low RDY output. The
32      pin doubles as the IQS7211E's active-low MCLR input, in which case this
33      GPIO must be configured as open-drain.
34
35  reset-gpios:
36    maxItems: 1
37    description:
38      Specifies the GPIO connected to the device's active-low MCLR input. The
39      device is temporarily held in hardware reset prior to initialization if
40      this property is present.
41
42  azoteq,forced-comms:
43    type: boolean
44    description:
45      Enables forced communication; to be used with host adapters that cannot
46      tolerate clock stretching.
47
48  azoteq,forced-comms-default:
49    $ref: /schemas/types.yaml#/definitions/uint32
50    enum: [0, 1]
51    description:
52      Indicates if the device's OTP memory enables (1) or disables (0) forced
53      communication by default. Specifying this property can expedite startup
54      time if the default value is known.
55
56      If this property is not specified, communication is not initiated until
57      the device asserts its RDY pin shortly after exiting hardware reset. At
58      that point, forced communication is either enabled or disabled based on
59      the presence or absence of the 'azoteq,forced-comms' property.
60
61  azoteq,rate-active-ms:
62    minimum: 0
63    maximum: 65535
64    description: Specifies the report rate (in ms) during active mode.
65
66  azoteq,rate-touch-ms:
67    minimum: 0
68    maximum: 65535
69    description: Specifies the report rate (in ms) during idle-touch mode.
70
71  azoteq,rate-idle-ms:
72    minimum: 0
73    maximum: 65535
74    description: Specifies the report rate (in ms) during idle mode.
75
76  azoteq,rate-lp1-ms:
77    minimum: 0
78    maximum: 65535
79    description: Specifies the report rate (in ms) during low-power mode 1.
80
81  azoteq,rate-lp2-ms:
82    minimum: 0
83    maximum: 65535
84    description: Specifies the report rate (in ms) during low-power mode 2.
85
86  azoteq,timeout-active-ms:
87    multipleOf: 1000
88    minimum: 0
89    maximum: 65535000
90    description:
91      Specifies the length of time (in ms) to wait for an event before moving
92      from active mode to idle or idle-touch modes.
93
94  azoteq,timeout-touch-ms:
95    multipleOf: 1000
96    minimum: 0
97    maximum: 65535000
98    description:
99      Specifies the length of time (in ms) to wait for an event before moving
100      from idle-touch mode to idle mode.
101
102  azoteq,timeout-idle-ms:
103    multipleOf: 1000
104    minimum: 0
105    maximum: 65535000
106    description:
107      Specifies the length of time (in ms) to wait for an event before moving
108      from idle mode to low-power mode 1.
109
110  azoteq,timeout-lp1-ms:
111    multipleOf: 1000
112    minimum: 0
113    maximum: 65535000
114    description:
115      Specifies the length of time (in ms) to wait for an event before moving
116      from low-power mode 1 to low-power mode 2.
117
118  azoteq,timeout-lp2-ms:
119    multipleOf: 1000
120    minimum: 0
121    maximum: 60000
122    description:
123      Specifies the rate (in ms) at which the trackpad reference values
124      are updated during low-power modes 1 and 2.
125
126  azoteq,timeout-ati-ms:
127    multipleOf: 1000
128    minimum: 0
129    maximum: 60000
130    description:
131      Specifies the delay (in ms) before the automatic tuning implementation
132      (ATI) is retried in the event it fails to complete.
133
134  azoteq,timeout-comms-ms:
135    minimum: 0
136    maximum: 65535
137    description:
138      Specifies the delay (in ms) before a communication window is closed.
139
140  azoteq,timeout-press-ms:
141    multipleOf: 1000
142    minimum: 0
143    maximum: 60000
144    description:
145      Specifies the length of time (in ms) to wait before automatically
146      releasing a press event. Specify zero to allow the press state to
147      persist indefinitely.
148
149  azoteq,fosc-freq:
150    $ref: /schemas/types.yaml#/definitions/uint32
151    enum: [0, 1]
152    description: |
153      Specifies the device's core clock frequency as follows:
154      0: 14 MHz
155      1: 18 MHz
156
157  azoteq,fosc-trim:
158    $ref: /schemas/types.yaml#/definitions/uint32
159    minimum: 0
160    maximum: 15
161    description: Specifies the device's core clock frequency trim.
162
163  azoteq,num-contacts:
164    $ref: /schemas/types.yaml#/definitions/uint32
165    minimum: 0
166    maximum: 2
167    default: 0
168    description: Specifies the number of contacts reported by the device.
169
170  azoteq,contact-split:
171    $ref: /schemas/types.yaml#/definitions/uint32
172    minimum: 0
173    maximum: 255
174    description: Specifies the contact (finger) split factor.
175
176  azoteq,trim-x:
177    $ref: /schemas/types.yaml#/definitions/uint32
178    minimum: 0
179    maximum: 255
180    description: Specifies the horizontal trim width.
181
182  azoteq,trim-y:
183    $ref: /schemas/types.yaml#/definitions/uint32
184    minimum: 0
185    maximum: 255
186    description: Specifies the vertical trim height.
187
188  trackpad:
189    type: object
190    description: Represents all channels associated with the trackpad.
191
192    properties:
193      azoteq,rx-enable:
194        $ref: /schemas/types.yaml#/definitions/uint32-array
195        minItems: 1
196        maxItems: 8
197        items:
198          minimum: 0
199          maximum: 7
200        description:
201          Specifies the order of the CRx pin(s) associated with the trackpad.
202
203      azoteq,tx-enable:
204        $ref: /schemas/types.yaml#/definitions/uint32-array
205        minItems: 1
206        maxItems: 12
207        items:
208          minimum: 0
209          maximum: 11
210        description:
211          Specifies the order of the CTx pin(s) associated with the trackpad.
212
213      azoteq,channel-select:
214        $ref: /schemas/types.yaml#/definitions/uint32-array
215        minItems: 1
216        maxItems: 36
217        items:
218          minimum: 0
219          maximum: 255
220        description: |
221          Specifies the channels mapped to each cycle in the following order:
222          Cycle 0, slot 0
223          Cycle 0, slot 1
224          Cycle 1, slot 0
225          Cycle 1, slot 1
226          ...and so on. Specify 255 to disable a given slot.
227
228      azoteq,ati-frac-div-fine:
229        $ref: /schemas/types.yaml#/definitions/uint32
230        minimum: 0
231        maximum: 31
232        description: Specifies the trackpad's ATI fine fractional divider.
233
234      azoteq,ati-frac-mult-coarse:
235        $ref: /schemas/types.yaml#/definitions/uint32
236        minimum: 0
237        maximum: 15
238        description: Specifies the trackpad's ATI coarse fractional multiplier.
239
240      azoteq,ati-frac-div-coarse:
241        $ref: /schemas/types.yaml#/definitions/uint32
242        minimum: 0
243        maximum: 31
244        description: Specifies the trackpad's ATI coarse fractional divider.
245
246      azoteq,ati-comp-div:
247        $ref: /schemas/types.yaml#/definitions/uint32
248        minimum: 0
249        maximum: 31
250        description: Specifies the trackpad's ATI compensation divider.
251
252      azoteq,ati-target:
253        $ref: /schemas/types.yaml#/definitions/uint32
254        minimum: 0
255        maximum: 65535
256        description: Specifies the trackpad's ATI target.
257
258      azoteq,touch-enter:
259        $ref: /schemas/types.yaml#/definitions/uint32
260        minimum: 0
261        maximum: 255
262        description: Specifies the trackpad's touch entrance factor.
263
264      azoteq,touch-exit:
265        $ref: /schemas/types.yaml#/definitions/uint32
266        minimum: 0
267        maximum: 255
268        description: Specifies the trackpad's touch exit factor.
269
270      azoteq,thresh:
271        $ref: /schemas/types.yaml#/definitions/uint32
272        minimum: 0
273        maximum: 255
274        description: Specifies the trackpad's stationary touch threshold.
275
276      azoteq,conv-period:
277        $ref: /schemas/types.yaml#/definitions/uint32
278        minimum: 0
279        maximum: 255
280        description: Specifies the trackpad's conversion period.
281
282      azoteq,conv-frac:
283        $ref: /schemas/types.yaml#/definitions/uint32
284        minimum: 0
285        maximum: 255
286        description: Specifies the trackpad's conversion frequency fraction.
287
288    patternProperties:
289      "^event-(tap(-double|-triple)?|hold|palm|swipe-(x|y)-(pos|neg)(-hold)?)$":
290        type: object
291        $ref: ../input.yaml#
292        description:
293          Represents a gesture event reported by the trackpad. In the case of
294          axial gestures, the duration or distance specified in one direction
295          applies to both directions along the same axis.
296
297        properties:
298          linux,code: true
299
300          azoteq,gesture-max-ms:
301            minimum: 0
302            maximum: 65535
303            description: Specifies the maximum duration of tap/swipe gestures.
304
305          azoteq,gesture-mid-ms:
306            minimum: 0
307            maximum: 65535
308            description:
309              Specifies the maximum duration between subsequent tap gestures
310              (IQS7211E only).
311
312          azoteq,gesture-min-ms:
313            minimum: 0
314            maximum: 65535
315            description: Specifies the minimum duration of hold gestures.
316
317          azoteq,gesture-dist:
318            $ref: /schemas/types.yaml#/definitions/uint32
319            minimum: 0
320            maximum: 65535
321            description:
322              Specifies the minimum (swipe) or maximum (tap and hold) distance
323              a finger may travel to be considered a gesture.
324
325          azoteq,gesture-dist-rep:
326            $ref: /schemas/types.yaml#/definitions/uint32
327            minimum: 0
328            maximum: 65535
329            description:
330              Specifies the minimum distance a finger must travel to elicit a
331              repeated swipe gesture (IQS7211E only).
332
333          azoteq,gesture-angle:
334            $ref: /schemas/types.yaml#/definitions/uint32
335            minimum: 0
336            maximum: 75
337            description:
338              Specifies the maximum angle (in degrees) a finger may travel to
339              be considered a swipe gesture.
340
341          azoteq,thresh:
342            $ref: /schemas/types.yaml#/definitions/uint32
343            minimum: 0
344            maximum: 42
345            description: Specifies the palm gesture threshold (IQS7211E only).
346
347        additionalProperties: false
348
349    dependencies:
350      azoteq,rx-enable: ["azoteq,tx-enable"]
351      azoteq,tx-enable: ["azoteq,rx-enable"]
352      azoteq,channel-select: ["azoteq,rx-enable"]
353
354    additionalProperties: false
355
356  alp:
357    type: object
358    $ref: ../input.yaml#
359    description: Represents the alternate low-power channel (ALP).
360
361    properties:
362      azoteq,rx-enable:
363        $ref: /schemas/types.yaml#/definitions/uint32-array
364        minItems: 1
365        maxItems: 8
366        items:
367          minimum: 0
368          maximum: 7
369        description:
370          Specifies the CRx pin(s) associated with the ALP in no particular
371          order.
372
373      azoteq,tx-enable:
374        $ref: /schemas/types.yaml#/definitions/uint32-array
375        minItems: 1
376        maxItems: 12
377        items:
378          minimum: 0
379          maximum: 11
380        description:
381          Specifies the CTx pin(s) associated with the ALP in no particular
382          order.
383
384      azoteq,ati-frac-div-fine:
385        $ref: /schemas/types.yaml#/definitions/uint32
386        minimum: 0
387        maximum: 31
388        description: Specifies the ALP's ATI fine fractional divider.
389
390      azoteq,ati-frac-mult-coarse:
391        $ref: /schemas/types.yaml#/definitions/uint32
392        minimum: 0
393        maximum: 15
394        description: Specifies the ALP's ATI coarse fractional multiplier.
395
396      azoteq,ati-frac-div-coarse:
397        $ref: /schemas/types.yaml#/definitions/uint32
398        minimum: 0
399        maximum: 31
400        description: Specifies the ALP's ATI coarse fractional divider.
401
402      azoteq,ati-comp-div:
403        $ref: /schemas/types.yaml#/definitions/uint32
404        minimum: 0
405        maximum: 31
406        description: Specifies the ALP's ATI compensation divider.
407
408      azoteq,ati-target:
409        $ref: /schemas/types.yaml#/definitions/uint32
410        minimum: 0
411        maximum: 65535
412        description: Specifies the ALP's ATI target.
413
414      azoteq,ati-base:
415        $ref: /schemas/types.yaml#/definitions/uint32
416        multipleOf: 8
417        minimum: 0
418        maximum: 255
419        description: Specifies the ALP's ATI base.
420
421      azoteq,ati-mode:
422        $ref: /schemas/types.yaml#/definitions/uint32
423        enum: [0, 1]
424        description: |
425          Specifies the ALP's ATI mode as follows:
426          0: Partial
427          1: Full
428
429      azoteq,sense-mode:
430        $ref: /schemas/types.yaml#/definitions/uint32
431        enum: [0, 1]
432        description: |
433          Specifies the ALP's sensing mode as follows:
434          0: Self capacitive
435          1: Mutual capacitive
436
437      azoteq,debounce-enter:
438        $ref: /schemas/types.yaml#/definitions/uint32
439        minimum: 0
440        maximum: 255
441        description: Specifies the ALP's debounce entrance factor.
442
443      azoteq,debounce-exit:
444        $ref: /schemas/types.yaml#/definitions/uint32
445        minimum: 0
446        maximum: 255
447        description: Specifies the ALP's debounce exit factor.
448
449      azoteq,thresh:
450        $ref: /schemas/types.yaml#/definitions/uint32
451        minimum: 0
452        maximum: 65535
453        description: Specifies the ALP's proximity or touch threshold.
454
455      azoteq,conv-period:
456        $ref: /schemas/types.yaml#/definitions/uint32
457        minimum: 0
458        maximum: 255
459        description: Specifies the ALP's conversion period.
460
461      azoteq,conv-frac:
462        $ref: /schemas/types.yaml#/definitions/uint32
463        minimum: 0
464        maximum: 255
465        description: Specifies the ALP's conversion frequency fraction.
466
467      linux,code: true
468
469    additionalProperties: false
470
471  button:
472    type: object
473    description: Represents the inductive or capacitive button.
474
475    properties:
476      azoteq,ati-frac-div-fine:
477        $ref: /schemas/types.yaml#/definitions/uint32
478        minimum: 0
479        maximum: 31
480        description: Specifies the button's ATI fine fractional divider.
481
482      azoteq,ati-frac-mult-coarse:
483        $ref: /schemas/types.yaml#/definitions/uint32
484        minimum: 0
485        maximum: 15
486        description: Specifies the button's ATI coarse fractional multiplier.
487
488      azoteq,ati-frac-div-coarse:
489        $ref: /schemas/types.yaml#/definitions/uint32
490        minimum: 0
491        maximum: 31
492        description: Specifies the button's ATI coarse fractional divider.
493
494      azoteq,ati-comp-div:
495        $ref: /schemas/types.yaml#/definitions/uint32
496        minimum: 0
497        maximum: 31
498        description: Specifies the button's ATI compensation divider.
499
500      azoteq,ati-target:
501        $ref: /schemas/types.yaml#/definitions/uint32
502        minimum: 0
503        maximum: 65535
504        description: Specifies the button's ATI target.
505
506      azoteq,ati-base:
507        $ref: /schemas/types.yaml#/definitions/uint32
508        multipleOf: 8
509        minimum: 0
510        maximum: 255
511        description: Specifies the button's ATI base.
512
513      azoteq,ati-mode:
514        $ref: /schemas/types.yaml#/definitions/uint32
515        enum: [0, 1]
516        description: |
517          Specifies the button's ATI mode as follows:
518          0: Partial
519          1: Full
520
521      azoteq,sense-mode:
522        $ref: /schemas/types.yaml#/definitions/uint32
523        enum: [0, 1, 2]
524        description: |
525          Specifies the button's sensing mode as follows:
526          0: Self capacitive
527          1: Mutual capacitive
528          2: Inductive
529
530      azoteq,touch-enter:
531        $ref: /schemas/types.yaml#/definitions/uint32
532        minimum: 0
533        maximum: 255
534        description: Specifies the button's touch entrance factor.
535
536      azoteq,touch-exit:
537        $ref: /schemas/types.yaml#/definitions/uint32
538        minimum: 0
539        maximum: 255
540        description: Specifies the button's touch exit factor.
541
542      azoteq,debounce-enter:
543        $ref: /schemas/types.yaml#/definitions/uint32
544        minimum: 0
545        maximum: 255
546        description: Specifies the button's debounce entrance factor.
547
548      azoteq,debounce-exit:
549        $ref: /schemas/types.yaml#/definitions/uint32
550        minimum: 0
551        maximum: 255
552        description: Specifies the button's debounce exit factor.
553
554      azoteq,thresh:
555        $ref: /schemas/types.yaml#/definitions/uint32
556        minimum: 0
557        maximum: 65535
558        description: Specifies the button's proximity threshold.
559
560      azoteq,conv-period:
561        $ref: /schemas/types.yaml#/definitions/uint32
562        minimum: 0
563        maximum: 255
564        description: Specifies the button's conversion period.
565
566      azoteq,conv-frac:
567        $ref: /schemas/types.yaml#/definitions/uint32
568        minimum: 0
569        maximum: 255
570        description: Specifies the button's conversion frequency fraction.
571
572    patternProperties:
573      "^event-(prox|touch)$":
574        type: object
575        $ref: ../input.yaml#
576        description:
577          Represents a proximity or touch event reported by the button.
578
579        properties:
580          linux,code: true
581
582        additionalProperties: false
583
584    additionalProperties: false
585
586  wakeup-source: true
587
588  touchscreen-size-x: true
589  touchscreen-size-y: true
590  touchscreen-inverted-x: true
591  touchscreen-inverted-y: true
592  touchscreen-swapped-x-y: true
593
594dependencies:
595  touchscreen-size-x: ["azoteq,num-contacts"]
596  touchscreen-size-y: ["azoteq,num-contacts"]
597  touchscreen-inverted-x: ["azoteq,num-contacts"]
598  touchscreen-inverted-y: ["azoteq,num-contacts"]
599  touchscreen-swapped-x-y: ["azoteq,num-contacts"]
600
601required:
602  - compatible
603  - reg
604  - irq-gpios
605
606additionalProperties: false
607
608allOf:
609  - $ref: touchscreen.yaml#
610
611  - if:
612      properties:
613        compatible:
614          contains:
615            const: azoteq,iqs7210a
616
617    then:
618      properties:
619        alp:
620          properties:
621            azoteq,rx-enable:
622              maxItems: 4
623              items:
624                minimum: 4
625
626    else:
627      properties:
628        azoteq,timeout-press-ms: false
629
630        alp:
631          properties:
632            azoteq,ati-mode: false
633
634        button: false
635
636  - if:
637      properties:
638        compatible:
639          contains:
640            const: azoteq,iqs7211e
641
642    then:
643      properties:
644        reset-gpios: false
645
646        trackpad:
647          properties:
648            azoteq,tx-enable:
649              maxItems: 13
650              items:
651                maximum: 12
652
653        alp:
654          properties:
655            azoteq,tx-enable:
656              maxItems: 13
657              items:
658                maximum: 12
659
660examples:
661  - |
662    #include <dt-bindings/gpio/gpio.h>
663    #include <dt-bindings/input/input.h>
664
665    i2c {
666            #address-cells = <1>;
667            #size-cells = <0>;
668
669            touchscreen@56 {
670                    compatible = "azoteq,iqs7210a";
671                    reg = <0x56>;
672                    irq-gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
673                    reset-gpios = <&gpio 17 (GPIO_ACTIVE_LOW |
674                                             GPIO_PUSH_PULL)>;
675                    azoteq,num-contacts = <2>;
676
677                    trackpad {
678                            azoteq,rx-enable = <6>, <5>, <4>, <3>, <2>;
679                            azoteq,tx-enable = <1>, <7>, <8>, <9>, <10>;
680                    };
681
682                    button {
683                            azoteq,sense-mode = <2>;
684                            azoteq,touch-enter = <40>;
685                            azoteq,touch-exit = <36>;
686
687                            event-touch {
688                                    linux,code = <KEY_HOME>;
689                            };
690                    };
691
692                    alp {
693                            azoteq,sense-mode = <1>;
694                            linux,code = <KEY_POWER>;
695                    };
696            };
697    };
698
699  - |
700    #include <dt-bindings/gpio/gpio.h>
701    #include <dt-bindings/input/input.h>
702
703    i2c {
704            #address-cells = <1>;
705            #size-cells = <0>;
706
707            touchscreen@56 {
708                    compatible = "azoteq,iqs7211e";
709                    reg = <0x56>;
710                    irq-gpios = <&gpio 4 (GPIO_ACTIVE_LOW |
711                                          GPIO_OPEN_DRAIN)>;
712
713                    trackpad {
714                            event-tap {
715                                    linux,code = <KEY_PLAYPAUSE>;
716                            };
717
718                            event-tap-double {
719                                    linux,code = <KEY_SHUFFLE>;
720                            };
721
722                            event-tap-triple {
723                                    linux,code = <KEY_AGAIN>;
724                            };
725
726                            event-hold {
727                                    linux,code = <KEY_STOP>;
728                            };
729
730                            event-palm {
731                                    linux,code = <KEY_EXIT>;
732                            };
733
734                            event-swipe-x-pos {
735                                    linux,code = <KEY_REWIND>;
736                            };
737
738                            event-swipe-x-pos-hold {
739                                    linux,code = <KEY_PREVIOUS>;
740                            };
741
742                            event-swipe-x-neg {
743                                    linux,code = <KEY_FASTFORWARD>;
744                            };
745
746                            event-swipe-x-neg-hold {
747                                    linux,code = <KEY_NEXT>;
748                            };
749
750                            event-swipe-y-pos {
751                                    linux,code = <KEY_VOLUMEUP>;
752                            };
753
754                            event-swipe-y-pos-hold {
755                                    linux,code = <KEY_MUTE>;
756                            };
757
758                            event-swipe-y-neg {
759                                    linux,code = <KEY_VOLUMEDOWN>;
760                            };
761
762                            event-swipe-y-neg-hold {
763                                    linux,code = <KEY_MUTE>;
764                            };
765                    };
766            };
767    };
768
769...
770