1 // SPDX-License-Identifier: GPL-2.0+
3 * Azoteq IQS626A Capacitive Touch Controller
7 * This driver registers up to 2 input devices: one representing capacitive or
8 * inductive keys as well as Hall-effect switches, and one for a trackpad that
9 * can express various gestures.
12 #include <linux/bits.h>
13 #include <linux/completion.h>
14 #include <linux/delay.h>
15 #include <linux/device.h>
16 #include <linux/err.h>
17 #include <linux/i2c.h>
18 #include <linux/input.h>
19 #include <linux/input/touchscreen.h>
20 #include <linux/interrupt.h>
21 #include <linux/kernel.h>
22 #include <linux/mod_devicetable.h>
23 #include <linux/module.h>
24 #include <linux/property.h>
25 #include <linux/regmap.h>
26 #include <linux/slab.h>
28 #define IQS626_VER_INFO 0x00
29 #define IQS626_VER_INFO_PROD_NUM 0x51
31 #define IQS626_SYS_FLAGS 0x02
32 #define IQS626_SYS_FLAGS_SHOW_RESET BIT(15)
33 #define IQS626_SYS_FLAGS_IN_ATI BIT(12)
34 #define IQS626_SYS_FLAGS_PWR_MODE_MASK GENMASK(9, 8)
35 #define IQS626_SYS_FLAGS_PWR_MODE_SHIFT 8
37 #define IQS626_HALL_OUTPUT 0x23
39 #define IQS626_SYS_SETTINGS 0x80
40 #define IQS626_SYS_SETTINGS_CLK_DIV BIT(15)
41 #define IQS626_SYS_SETTINGS_ULP_AUTO BIT(14)
42 #define IQS626_SYS_SETTINGS_DIS_AUTO BIT(13)
43 #define IQS626_SYS_SETTINGS_PWR_MODE_MASK GENMASK(12, 11)
44 #define IQS626_SYS_SETTINGS_PWR_MODE_SHIFT 11
45 #define IQS626_SYS_SETTINGS_PWR_MODE_MAX 3
46 #define IQS626_SYS_SETTINGS_ULP_UPDATE_MASK GENMASK(10, 8)
47 #define IQS626_SYS_SETTINGS_ULP_UPDATE_SHIFT 8
48 #define IQS626_SYS_SETTINGS_ULP_UPDATE_MAX 7
49 #define IQS626_SYS_SETTINGS_EVENT_MODE BIT(5)
50 #define IQS626_SYS_SETTINGS_EVENT_MODE_LP BIT(4)
51 #define IQS626_SYS_SETTINGS_REDO_ATI BIT(2)
52 #define IQS626_SYS_SETTINGS_ACK_RESET BIT(0)
54 #define IQS626_MISC_A_ATI_BAND_DISABLE BIT(7)
55 #define IQS626_MISC_A_TPx_LTA_UPDATE_MASK GENMASK(6, 4)
56 #define IQS626_MISC_A_TPx_LTA_UPDATE_SHIFT 4
57 #define IQS626_MISC_A_TPx_LTA_UPDATE_MAX 7
58 #define IQS626_MISC_A_ATI_LP_ONLY BIT(3)
59 #define IQS626_MISC_A_GPIO3_SELECT_MASK GENMASK(2, 0)
60 #define IQS626_MISC_A_GPIO3_SELECT_MAX 7
62 #define IQS626_EVENT_MASK_SYS BIT(6)
63 #define IQS626_EVENT_MASK_GESTURE BIT(3)
64 #define IQS626_EVENT_MASK_DEEP BIT(2)
65 #define IQS626_EVENT_MASK_TOUCH BIT(1)
66 #define IQS626_EVENT_MASK_PROX BIT(0)
68 #define IQS626_RATE_NP_MS_MAX 255
69 #define IQS626_RATE_LP_MS_MAX 255
70 #define IQS626_RATE_ULP_MS_MAX 4080
71 #define IQS626_TIMEOUT_PWR_MS_MAX 130560
72 #define IQS626_TIMEOUT_LTA_MS_MAX 130560
74 #define IQS626_MISC_B_RESEED_UI_SEL_MASK GENMASK(7, 6)
75 #define IQS626_MISC_B_RESEED_UI_SEL_SHIFT 6
76 #define IQS626_MISC_B_RESEED_UI_SEL_MAX 3
77 #define IQS626_MISC_B_THRESH_EXTEND BIT(5)
78 #define IQS626_MISC_B_TRACKING_UI_ENABLE BIT(4)
79 #define IQS626_MISC_B_TPx_SWIPE BIT(3)
80 #define IQS626_MISC_B_RESEED_OFFSET BIT(2)
81 #define IQS626_MISC_B_FILT_STR_TPx GENMASK(1, 0)
83 #define IQS626_THRESH_SWIPE_MAX 255
84 #define IQS626_TIMEOUT_TAP_MS_MAX 4080
85 #define IQS626_TIMEOUT_SWIPE_MS_MAX 4080
87 #define IQS626_CHx_ENG_0_MEAS_CAP_SIZE BIT(7)
88 #define IQS626_CHx_ENG_0_RX_TERM_VSS BIT(5)
89 #define IQS626_CHx_ENG_0_LINEARIZE BIT(4)
90 #define IQS626_CHx_ENG_0_DUAL_DIR BIT(3)
91 #define IQS626_CHx_ENG_0_FILT_DISABLE BIT(2)
92 #define IQS626_CHx_ENG_0_ATI_MODE_MASK GENMASK(1, 0)
93 #define IQS626_CHx_ENG_0_ATI_MODE_MAX 3
95 #define IQS626_CHx_ENG_1_CCT_HIGH_1 BIT(7)
96 #define IQS626_CHx_ENG_1_CCT_HIGH_0 BIT(6)
97 #define IQS626_CHx_ENG_1_PROJ_BIAS_MASK GENMASK(5, 4)
98 #define IQS626_CHx_ENG_1_PROJ_BIAS_SHIFT 4
99 #define IQS626_CHx_ENG_1_PROJ_BIAS_MAX 3
100 #define IQS626_CHx_ENG_1_CCT_ENABLE BIT(3)
101 #define IQS626_CHx_ENG_1_SENSE_FREQ_MASK GENMASK(2, 1)
102 #define IQS626_CHx_ENG_1_SENSE_FREQ_SHIFT 1
103 #define IQS626_CHx_ENG_1_SENSE_FREQ_MAX 3
104 #define IQS626_CHx_ENG_1_ATI_BAND_TIGHTEN BIT(0)
106 #define IQS626_CHx_ENG_2_LOCAL_CAP_MASK GENMASK(7, 6)
107 #define IQS626_CHx_ENG_2_LOCAL_CAP_SHIFT 6
108 #define IQS626_CHx_ENG_2_LOCAL_CAP_MAX 3
109 #define IQS626_CHx_ENG_2_LOCAL_CAP_ENABLE BIT(5)
110 #define IQS626_CHx_ENG_2_SENSE_MODE_MASK GENMASK(3, 0)
111 #define IQS626_CHx_ENG_2_SENSE_MODE_MAX 15
113 #define IQS626_CHx_ENG_3_TX_FREQ_MASK GENMASK(5, 4)
114 #define IQS626_CHx_ENG_3_TX_FREQ_SHIFT 4
115 #define IQS626_CHx_ENG_3_TX_FREQ_MAX 3
116 #define IQS626_CHx_ENG_3_INV_LOGIC BIT(0)
118 #define IQS626_CHx_ENG_4_RX_TERM_VREG BIT(6)
119 #define IQS626_CHx_ENG_4_CCT_LOW_1 BIT(5)
120 #define IQS626_CHx_ENG_4_CCT_LOW_0 BIT(4)
121 #define IQS626_CHx_ENG_4_COMP_DISABLE BIT(1)
122 #define IQS626_CHx_ENG_4_STATIC_ENABLE BIT(0)
124 #define IQS626_TPx_ATI_BASE_MIN 45
125 #define IQS626_TPx_ATI_BASE_MAX 300
126 #define IQS626_CHx_ATI_BASE_MASK GENMASK(7, 6)
127 #define IQS626_CHx_ATI_BASE_75 0x00
128 #define IQS626_CHx_ATI_BASE_100 0x40
129 #define IQS626_CHx_ATI_BASE_150 0x80
130 #define IQS626_CHx_ATI_BASE_200 0xC0
131 #define IQS626_CHx_ATI_TARGET_MASK GENMASK(5, 0)
132 #define IQS626_CHx_ATI_TARGET_MAX 2016
134 #define IQS626_CHx_THRESH_MAX 255
135 #define IQS626_CHx_HYST_DEEP_MASK GENMASK(7, 4)
136 #define IQS626_CHx_HYST_DEEP_SHIFT 4
137 #define IQS626_CHx_HYST_TOUCH_MASK GENMASK(3, 0)
138 #define IQS626_CHx_HYST_MAX 15
140 #define IQS626_FILT_STR_NP_TPx_MASK GENMASK(7, 6)
141 #define IQS626_FILT_STR_NP_TPx_SHIFT 6
142 #define IQS626_FILT_STR_LP_TPx_MASK GENMASK(5, 4)
143 #define IQS626_FILT_STR_LP_TPx_SHIFT 4
145 #define IQS626_FILT_STR_NP_CNT_MASK GENMASK(7, 6)
146 #define IQS626_FILT_STR_NP_CNT_SHIFT 6
147 #define IQS626_FILT_STR_LP_CNT_MASK GENMASK(5, 4)
148 #define IQS626_FILT_STR_LP_CNT_SHIFT 4
149 #define IQS626_FILT_STR_NP_LTA_MASK GENMASK(3, 2)
150 #define IQS626_FILT_STR_NP_LTA_SHIFT 2
151 #define IQS626_FILT_STR_LP_LTA_MASK GENMASK(1, 0)
152 #define IQS626_FILT_STR_MAX 3
154 #define IQS626_ULP_PROJ_ENABLE BIT(4)
155 #define IQS626_GEN_WEIGHT_MAX 255
157 #define IQS626_MAX_REG 0xFF
159 #define IQS626_NUM_CH_TP_3 9
160 #define IQS626_NUM_CH_TP_2 6
161 #define IQS626_NUM_CH_GEN 3
162 #define IQS626_NUM_CRx_TX 8
164 #define IQS626_PWR_MODE_POLL_SLEEP_US 50000
165 #define IQS626_PWR_MODE_POLL_TIMEOUT_US 500000
167 #define iqs626_irq_wait() usleep_range(350, 400)
179 enum iqs626_rx_inactive {
180 IQS626_RX_INACTIVE_VSS,
181 IQS626_RX_INACTIVE_FLOAT,
182 IQS626_RX_INACTIVE_VREG,
185 enum iqs626_st_offs {
188 IQS626_ST_OFFS_TOUCH,
192 enum iqs626_th_offs {
194 IQS626_TH_OFFS_TOUCH,
198 enum iqs626_event_id {
199 IQS626_EVENT_PROX_DN,
200 IQS626_EVENT_PROX_UP,
201 IQS626_EVENT_TOUCH_DN,
202 IQS626_EVENT_TOUCH_UP,
203 IQS626_EVENT_DEEP_DN,
204 IQS626_EVENT_DEEP_UP,
207 enum iqs626_gesture_id {
208 IQS626_GESTURE_FLICK_X_POS,
209 IQS626_GESTURE_FLICK_X_NEG,
210 IQS626_GESTURE_FLICK_Y_POS,
211 IQS626_GESTURE_FLICK_Y_NEG,
217 struct iqs626_event_desc {
219 enum iqs626_st_offs st_offs;
220 enum iqs626_th_offs th_offs;
225 static const struct iqs626_event_desc iqs626_events[] = {
226 [IQS626_EVENT_PROX_DN] = {
227 .name = "event-prox",
228 .st_offs = IQS626_ST_OFFS_PROX,
229 .th_offs = IQS626_TH_OFFS_PROX,
230 .mask = IQS626_EVENT_MASK_PROX,
232 [IQS626_EVENT_PROX_UP] = {
233 .name = "event-prox-alt",
234 .st_offs = IQS626_ST_OFFS_PROX,
235 .th_offs = IQS626_TH_OFFS_PROX,
237 .mask = IQS626_EVENT_MASK_PROX,
239 [IQS626_EVENT_TOUCH_DN] = {
240 .name = "event-touch",
241 .st_offs = IQS626_ST_OFFS_TOUCH,
242 .th_offs = IQS626_TH_OFFS_TOUCH,
243 .mask = IQS626_EVENT_MASK_TOUCH,
245 [IQS626_EVENT_TOUCH_UP] = {
246 .name = "event-touch-alt",
247 .st_offs = IQS626_ST_OFFS_TOUCH,
248 .th_offs = IQS626_TH_OFFS_TOUCH,
250 .mask = IQS626_EVENT_MASK_TOUCH,
252 [IQS626_EVENT_DEEP_DN] = {
253 .name = "event-deep",
254 .st_offs = IQS626_ST_OFFS_DEEP,
255 .th_offs = IQS626_TH_OFFS_DEEP,
256 .mask = IQS626_EVENT_MASK_DEEP,
258 [IQS626_EVENT_DEEP_UP] = {
259 .name = "event-deep-alt",
260 .st_offs = IQS626_ST_OFFS_DEEP,
261 .th_offs = IQS626_TH_OFFS_DEEP,
263 .mask = IQS626_EVENT_MASK_DEEP,
267 struct iqs626_ver_info {
274 struct iqs626_flags {
287 struct iqs626_ch_reg_ulp {
299 struct iqs626_ch_reg_tp {
305 struct iqs626_tp_grp_reg {
309 struct iqs626_ch_reg_tp ch_reg_tp[IQS626_NUM_CH_TP_3];
312 struct iqs626_ch_reg_gen {
326 struct iqs626_ch_reg_hall {
334 struct iqs626_sys_reg {
352 struct iqs626_ch_reg_ulp ch_reg_ulp;
353 struct iqs626_tp_grp_reg tp_grp_reg;
354 struct iqs626_ch_reg_gen ch_reg_gen[IQS626_NUM_CH_GEN];
355 struct iqs626_ch_reg_hall ch_reg_hall;
358 struct iqs626_channel_desc {
362 bool events[ARRAY_SIZE(iqs626_events)];
365 static const struct iqs626_channel_desc iqs626_channels[] = {
366 [IQS626_CH_ULP_0] = {
371 [IQS626_EVENT_PROX_DN] = true,
372 [IQS626_EVENT_PROX_UP] = true,
373 [IQS626_EVENT_TOUCH_DN] = true,
374 [IQS626_EVENT_TOUCH_UP] = true,
378 .name = "trackpad-3x2",
379 .num_ch = IQS626_NUM_CH_TP_2,
382 [IQS626_EVENT_TOUCH_DN] = true,
386 .name = "trackpad-3x3",
387 .num_ch = IQS626_NUM_CH_TP_3,
388 .active = BIT(2) | BIT(1),
390 [IQS626_EVENT_TOUCH_DN] = true,
393 [IQS626_CH_GEN_0] = {
398 [IQS626_EVENT_PROX_DN] = true,
399 [IQS626_EVENT_PROX_UP] = true,
400 [IQS626_EVENT_TOUCH_DN] = true,
401 [IQS626_EVENT_TOUCH_UP] = true,
402 [IQS626_EVENT_DEEP_DN] = true,
403 [IQS626_EVENT_DEEP_UP] = true,
406 [IQS626_CH_GEN_1] = {
411 [IQS626_EVENT_PROX_DN] = true,
412 [IQS626_EVENT_PROX_UP] = true,
413 [IQS626_EVENT_TOUCH_DN] = true,
414 [IQS626_EVENT_TOUCH_UP] = true,
415 [IQS626_EVENT_DEEP_DN] = true,
416 [IQS626_EVENT_DEEP_UP] = true,
419 [IQS626_CH_GEN_2] = {
424 [IQS626_EVENT_PROX_DN] = true,
425 [IQS626_EVENT_PROX_UP] = true,
426 [IQS626_EVENT_TOUCH_DN] = true,
427 [IQS626_EVENT_TOUCH_UP] = true,
428 [IQS626_EVENT_DEEP_DN] = true,
429 [IQS626_EVENT_DEEP_UP] = true,
437 [IQS626_EVENT_TOUCH_DN] = true,
438 [IQS626_EVENT_TOUCH_UP] = true,
443 struct iqs626_private {
444 struct i2c_client *client;
445 struct regmap *regmap;
446 struct iqs626_sys_reg sys_reg;
447 struct completion ati_done;
448 struct input_dev *keypad;
449 struct input_dev *trackpad;
450 struct touchscreen_properties prop;
451 unsigned int kp_type[ARRAY_SIZE(iqs626_channels)]
452 [ARRAY_SIZE(iqs626_events)];
453 unsigned int kp_code[ARRAY_SIZE(iqs626_channels)]
454 [ARRAY_SIZE(iqs626_events)];
455 unsigned int tp_code[IQS626_NUM_GESTURES];
456 unsigned int suspend_mode;
459 static noinline_for_stack int
460 iqs626_parse_events(struct iqs626_private *iqs626,
461 struct fwnode_handle *ch_node, enum iqs626_ch_id ch_id)
463 struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
464 struct i2c_client *client = iqs626->client;
471 case IQS626_CH_ULP_0:
472 thresh = sys_reg->ch_reg_ulp.thresh;
473 hyst = &sys_reg->ch_reg_ulp.hyst;
478 thresh = &sys_reg->tp_grp_reg.ch_reg_tp[0].thresh;
479 hyst = &sys_reg->tp_grp_reg.hyst;
482 case IQS626_CH_GEN_0:
483 case IQS626_CH_GEN_1:
484 case IQS626_CH_GEN_2:
485 i = ch_id - IQS626_CH_GEN_0;
486 thresh = sys_reg->ch_reg_gen[i].thresh;
487 hyst = &sys_reg->ch_reg_gen[i].hyst;
491 thresh = &sys_reg->ch_reg_hall.thresh;
492 hyst = &sys_reg->ch_reg_hall.hyst;
499 for (i = 0; i < ARRAY_SIZE(iqs626_events); i++) {
500 if (!iqs626_channels[ch_id].events[i])
503 struct fwnode_handle *ev_node __free(fwnode_handle) = NULL;
504 if (ch_id == IQS626_CH_TP_2 || ch_id == IQS626_CH_TP_3) {
506 * Trackpad touch events are simply described under the
507 * trackpad child node.
509 ev_node = fwnode_handle_get(ch_node);
511 ev_name = iqs626_events[i].name;
512 ev_node = fwnode_get_named_child_node(ch_node, ev_name);
516 if (!fwnode_property_read_u32(ev_node, "linux,code",
518 iqs626->kp_code[ch_id][i] = val;
520 if (fwnode_property_read_u32(ev_node,
523 if (ch_id == IQS626_CH_HALL)
529 if (val != EV_KEY && val != EV_SW) {
530 dev_err(&client->dev,
531 "Invalid input type: %u\n",
536 iqs626->kp_type[ch_id][i] = val;
538 sys_reg->event_mask &= ~iqs626_events[i].mask;
542 if (!fwnode_property_read_u32(ev_node, "azoteq,hyst", &val)) {
543 if (val > IQS626_CHx_HYST_MAX) {
544 dev_err(&client->dev,
545 "Invalid %s channel hysteresis: %u\n",
546 fwnode_get_name(ch_node), val);
550 if (i == IQS626_EVENT_DEEP_DN ||
551 i == IQS626_EVENT_DEEP_UP) {
552 *hyst &= ~IQS626_CHx_HYST_DEEP_MASK;
553 *hyst |= (val << IQS626_CHx_HYST_DEEP_SHIFT);
554 } else if (i == IQS626_EVENT_TOUCH_DN ||
555 i == IQS626_EVENT_TOUCH_UP) {
556 *hyst &= ~IQS626_CHx_HYST_TOUCH_MASK;
561 if (ch_id != IQS626_CH_TP_2 && ch_id != IQS626_CH_TP_3 &&
562 !fwnode_property_read_u32(ev_node, "azoteq,thresh", &val)) {
563 if (val > IQS626_CHx_THRESH_MAX) {
564 dev_err(&client->dev,
565 "Invalid %s channel threshold: %u\n",
566 fwnode_get_name(ch_node), val);
570 if (ch_id == IQS626_CH_HALL)
573 *(thresh + iqs626_events[i].th_offs) = val;
580 static noinline_for_stack int
581 iqs626_parse_ati_target(struct iqs626_private *iqs626,
582 struct fwnode_handle *ch_node, enum iqs626_ch_id ch_id)
584 struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
585 struct i2c_client *client = iqs626->client;
591 case IQS626_CH_ULP_0:
592 ati_target = &sys_reg->ch_reg_ulp.ati_target;
597 ati_target = &sys_reg->tp_grp_reg.ati_target;
600 case IQS626_CH_GEN_0:
601 case IQS626_CH_GEN_1:
602 case IQS626_CH_GEN_2:
603 i = ch_id - IQS626_CH_GEN_0;
604 ati_target = &sys_reg->ch_reg_gen[i].ati_target;
608 ati_target = &sys_reg->ch_reg_hall.ati_target;
615 if (!fwnode_property_read_u32(ch_node, "azoteq,ati-target", &val)) {
616 if (val > IQS626_CHx_ATI_TARGET_MAX) {
617 dev_err(&client->dev,
618 "Invalid %s channel ATI target: %u\n",
619 fwnode_get_name(ch_node), val);
623 *ati_target &= ~IQS626_CHx_ATI_TARGET_MASK;
624 *ati_target |= (val / 32);
627 if (ch_id != IQS626_CH_TP_2 && ch_id != IQS626_CH_TP_3 &&
628 !fwnode_property_read_u32(ch_node, "azoteq,ati-base", &val)) {
631 val = IQS626_CHx_ATI_BASE_75;
635 val = IQS626_CHx_ATI_BASE_100;
639 val = IQS626_CHx_ATI_BASE_150;
643 val = IQS626_CHx_ATI_BASE_200;
647 dev_err(&client->dev,
648 "Invalid %s channel ATI base: %u\n",
649 fwnode_get_name(ch_node), val);
653 *ati_target &= ~IQS626_CHx_ATI_BASE_MASK;
660 static int iqs626_parse_pins(struct iqs626_private *iqs626,
661 struct fwnode_handle *ch_node,
662 const char *propname, u8 *enable)
664 struct i2c_client *client = iqs626->client;
665 unsigned int val[IQS626_NUM_CRx_TX];
668 if (!fwnode_property_present(ch_node, propname))
671 count = fwnode_property_count_u32(ch_node, propname);
672 if (count > IQS626_NUM_CRx_TX) {
673 dev_err(&client->dev,
674 "Too many %s channel CRX/TX pins present\n",
675 fwnode_get_name(ch_node));
677 } else if (count < 0) {
678 dev_err(&client->dev,
679 "Failed to count %s channel CRX/TX pins: %d\n",
680 fwnode_get_name(ch_node), count);
684 error = fwnode_property_read_u32_array(ch_node, propname, val, count);
686 dev_err(&client->dev,
687 "Failed to read %s channel CRX/TX pins: %d\n",
688 fwnode_get_name(ch_node), error);
694 for (i = 0; i < count; i++) {
695 if (val[i] >= IQS626_NUM_CRx_TX) {
696 dev_err(&client->dev,
697 "Invalid %s channel CRX/TX pin: %u\n",
698 fwnode_get_name(ch_node), val[i]);
702 *enable |= BIT(val[i]);
708 static int iqs626_parse_trackpad(struct iqs626_private *iqs626,
709 struct fwnode_handle *ch_node,
710 enum iqs626_ch_id ch_id)
712 struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
713 struct i2c_client *client = iqs626->client;
714 u8 *hyst = &sys_reg->tp_grp_reg.hyst;
718 if (!fwnode_property_read_u32(ch_node, "azoteq,lta-update", &val)) {
719 if (val > IQS626_MISC_A_TPx_LTA_UPDATE_MAX) {
720 dev_err(&client->dev,
721 "Invalid %s channel update rate: %u\n",
722 fwnode_get_name(ch_node), val);
726 sys_reg->misc_a &= ~IQS626_MISC_A_TPx_LTA_UPDATE_MASK;
727 sys_reg->misc_a |= (val << IQS626_MISC_A_TPx_LTA_UPDATE_SHIFT);
730 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-trackpad",
732 if (val > IQS626_FILT_STR_MAX) {
733 dev_err(&client->dev,
734 "Invalid %s channel filter strength: %u\n",
735 fwnode_get_name(ch_node), val);
739 sys_reg->misc_b &= ~IQS626_MISC_B_FILT_STR_TPx;
740 sys_reg->misc_b |= val;
743 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-np-cnt",
745 if (val > IQS626_FILT_STR_MAX) {
746 dev_err(&client->dev,
747 "Invalid %s channel filter strength: %u\n",
748 fwnode_get_name(ch_node), val);
752 *hyst &= ~IQS626_FILT_STR_NP_TPx_MASK;
753 *hyst |= (val << IQS626_FILT_STR_NP_TPx_SHIFT);
756 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-lp-cnt",
758 if (val > IQS626_FILT_STR_MAX) {
759 dev_err(&client->dev,
760 "Invalid %s channel filter strength: %u\n",
761 fwnode_get_name(ch_node), val);
765 *hyst &= ~IQS626_FILT_STR_LP_TPx_MASK;
766 *hyst |= (val << IQS626_FILT_STR_LP_TPx_SHIFT);
769 for (i = 0; i < iqs626_channels[ch_id].num_ch; i++) {
770 u8 *ati_base = &sys_reg->tp_grp_reg.ch_reg_tp[i].ati_base;
771 u8 *thresh = &sys_reg->tp_grp_reg.ch_reg_tp[i].thresh;
774 snprintf(tc_name, sizeof(tc_name), "channel-%d", i);
776 struct fwnode_handle *tc_node __free(fwnode_handle) =
777 fwnode_get_named_child_node(ch_node, tc_name);
781 if (!fwnode_property_read_u32(tc_node, "azoteq,ati-base",
783 if (val < IQS626_TPx_ATI_BASE_MIN ||
784 val > IQS626_TPx_ATI_BASE_MAX) {
785 dev_err(&client->dev,
786 "Invalid %s %s ATI base: %u\n",
787 fwnode_get_name(ch_node), tc_name, val);
791 *ati_base = val - IQS626_TPx_ATI_BASE_MIN;
794 if (!fwnode_property_read_u32(tc_node, "azoteq,thresh",
796 if (val > IQS626_CHx_THRESH_MAX) {
797 dev_err(&client->dev,
798 "Invalid %s %s threshold: %u\n",
799 fwnode_get_name(ch_node), tc_name, val);
807 if (!fwnode_property_present(ch_node, "linux,keycodes"))
810 count = fwnode_property_count_u32(ch_node, "linux,keycodes");
811 if (count > IQS626_NUM_GESTURES) {
812 dev_err(&client->dev, "Too many keycodes present\n");
814 } else if (count < 0) {
815 dev_err(&client->dev, "Failed to count keycodes: %d\n", count);
819 error = fwnode_property_read_u32_array(ch_node, "linux,keycodes",
820 iqs626->tp_code, count);
822 dev_err(&client->dev, "Failed to read keycodes: %d\n", error);
826 sys_reg->misc_b &= ~IQS626_MISC_B_TPx_SWIPE;
827 if (fwnode_property_present(ch_node, "azoteq,gesture-swipe"))
828 sys_reg->misc_b |= IQS626_MISC_B_TPx_SWIPE;
830 if (!fwnode_property_read_u32(ch_node, "azoteq,timeout-tap-ms",
832 if (val > IQS626_TIMEOUT_TAP_MS_MAX) {
833 dev_err(&client->dev,
834 "Invalid %s channel timeout: %u\n",
835 fwnode_get_name(ch_node), val);
839 sys_reg->timeout_tap = val / 16;
842 if (!fwnode_property_read_u32(ch_node, "azoteq,timeout-swipe-ms",
844 if (val > IQS626_TIMEOUT_SWIPE_MS_MAX) {
845 dev_err(&client->dev,
846 "Invalid %s channel timeout: %u\n",
847 fwnode_get_name(ch_node), val);
851 sys_reg->timeout_swipe = val / 16;
854 if (!fwnode_property_read_u32(ch_node, "azoteq,thresh-swipe",
856 if (val > IQS626_THRESH_SWIPE_MAX) {
857 dev_err(&client->dev,
858 "Invalid %s channel threshold: %u\n",
859 fwnode_get_name(ch_node), val);
863 sys_reg->thresh_swipe = val;
866 sys_reg->event_mask &= ~IQS626_EVENT_MASK_GESTURE;
871 static noinline_for_stack int
872 iqs626_parse_channel(struct iqs626_private *iqs626,
873 struct fwnode_handle *ch_node, enum iqs626_ch_id ch_id)
875 struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
876 struct i2c_client *client = iqs626->client;
877 u8 *engine, *filter, *rx_enable, *tx_enable;
878 u8 *assoc_select, *assoc_weight;
883 case IQS626_CH_ULP_0:
884 engine = sys_reg->ch_reg_ulp.engine;
889 engine = sys_reg->tp_grp_reg.engine;
892 case IQS626_CH_GEN_0:
893 case IQS626_CH_GEN_1:
894 case IQS626_CH_GEN_2:
895 i = ch_id - IQS626_CH_GEN_0;
896 engine = sys_reg->ch_reg_gen[i].engine;
900 engine = &sys_reg->ch_reg_hall.engine;
907 error = iqs626_parse_ati_target(iqs626, ch_node, ch_id);
911 error = iqs626_parse_events(iqs626, ch_node, ch_id);
915 if (!fwnode_property_present(ch_node, "azoteq,ati-exclude"))
916 sys_reg->redo_ati |= iqs626_channels[ch_id].active;
918 if (!fwnode_property_present(ch_node, "azoteq,reseed-disable"))
919 sys_reg->reseed |= iqs626_channels[ch_id].active;
921 *engine |= IQS626_CHx_ENG_0_MEAS_CAP_SIZE;
922 if (fwnode_property_present(ch_node, "azoteq,meas-cap-decrease"))
923 *engine &= ~IQS626_CHx_ENG_0_MEAS_CAP_SIZE;
925 *engine |= IQS626_CHx_ENG_0_RX_TERM_VSS;
926 if (!fwnode_property_read_u32(ch_node, "azoteq,rx-inactive", &val)) {
928 case IQS626_RX_INACTIVE_VSS:
931 case IQS626_RX_INACTIVE_FLOAT:
932 *engine &= ~IQS626_CHx_ENG_0_RX_TERM_VSS;
933 if (ch_id == IQS626_CH_GEN_0 ||
934 ch_id == IQS626_CH_GEN_1 ||
935 ch_id == IQS626_CH_GEN_2)
936 *(engine + 4) &= ~IQS626_CHx_ENG_4_RX_TERM_VREG;
939 case IQS626_RX_INACTIVE_VREG:
940 if (ch_id == IQS626_CH_GEN_0 ||
941 ch_id == IQS626_CH_GEN_1 ||
942 ch_id == IQS626_CH_GEN_2) {
943 *engine &= ~IQS626_CHx_ENG_0_RX_TERM_VSS;
944 *(engine + 4) |= IQS626_CHx_ENG_4_RX_TERM_VREG;
950 dev_err(&client->dev,
951 "Invalid %s channel CRX pin termination: %u\n",
952 fwnode_get_name(ch_node), val);
957 *engine &= ~IQS626_CHx_ENG_0_LINEARIZE;
958 if (fwnode_property_present(ch_node, "azoteq,linearize"))
959 *engine |= IQS626_CHx_ENG_0_LINEARIZE;
961 *engine &= ~IQS626_CHx_ENG_0_DUAL_DIR;
962 if (fwnode_property_present(ch_node, "azoteq,dual-direction"))
963 *engine |= IQS626_CHx_ENG_0_DUAL_DIR;
965 *engine &= ~IQS626_CHx_ENG_0_FILT_DISABLE;
966 if (fwnode_property_present(ch_node, "azoteq,filt-disable"))
967 *engine |= IQS626_CHx_ENG_0_FILT_DISABLE;
969 if (!fwnode_property_read_u32(ch_node, "azoteq,ati-mode", &val)) {
970 if (val > IQS626_CHx_ENG_0_ATI_MODE_MAX) {
971 dev_err(&client->dev,
972 "Invalid %s channel ATI mode: %u\n",
973 fwnode_get_name(ch_node), val);
977 *engine &= ~IQS626_CHx_ENG_0_ATI_MODE_MASK;
981 if (ch_id == IQS626_CH_HALL)
984 *(engine + 1) &= ~IQS626_CHx_ENG_1_CCT_ENABLE;
985 if (!fwnode_property_read_u32(ch_node, "azoteq,cct-increase",
987 unsigned int orig_val = val--;
990 * In the case of the generic channels, the charge cycle time
991 * field doubles in size and straddles two separate registers.
993 if (ch_id == IQS626_CH_GEN_0 ||
994 ch_id == IQS626_CH_GEN_1 ||
995 ch_id == IQS626_CH_GEN_2) {
996 *(engine + 4) &= ~IQS626_CHx_ENG_4_CCT_LOW_1;
998 *(engine + 4) |= IQS626_CHx_ENG_4_CCT_LOW_1;
1000 *(engine + 4) &= ~IQS626_CHx_ENG_4_CCT_LOW_0;
1002 *(engine + 4) |= IQS626_CHx_ENG_4_CCT_LOW_0;
1007 if (val & ~GENMASK(1, 0)) {
1008 dev_err(&client->dev,
1009 "Invalid %s channel charge cycle time: %u\n",
1010 fwnode_get_name(ch_node), orig_val);
1014 *(engine + 1) &= ~IQS626_CHx_ENG_1_CCT_HIGH_1;
1016 *(engine + 1) |= IQS626_CHx_ENG_1_CCT_HIGH_1;
1018 *(engine + 1) &= ~IQS626_CHx_ENG_1_CCT_HIGH_0;
1020 *(engine + 1) |= IQS626_CHx_ENG_1_CCT_HIGH_0;
1022 *(engine + 1) |= IQS626_CHx_ENG_1_CCT_ENABLE;
1025 if (!fwnode_property_read_u32(ch_node, "azoteq,proj-bias", &val)) {
1026 if (val > IQS626_CHx_ENG_1_PROJ_BIAS_MAX) {
1027 dev_err(&client->dev,
1028 "Invalid %s channel bias current: %u\n",
1029 fwnode_get_name(ch_node), val);
1033 *(engine + 1) &= ~IQS626_CHx_ENG_1_PROJ_BIAS_MASK;
1034 *(engine + 1) |= (val << IQS626_CHx_ENG_1_PROJ_BIAS_SHIFT);
1037 if (!fwnode_property_read_u32(ch_node, "azoteq,sense-freq", &val)) {
1038 if (val > IQS626_CHx_ENG_1_SENSE_FREQ_MAX) {
1039 dev_err(&client->dev,
1040 "Invalid %s channel sensing frequency: %u\n",
1041 fwnode_get_name(ch_node), val);
1045 *(engine + 1) &= ~IQS626_CHx_ENG_1_SENSE_FREQ_MASK;
1046 *(engine + 1) |= (val << IQS626_CHx_ENG_1_SENSE_FREQ_SHIFT);
1049 *(engine + 1) &= ~IQS626_CHx_ENG_1_ATI_BAND_TIGHTEN;
1050 if (fwnode_property_present(ch_node, "azoteq,ati-band-tighten"))
1051 *(engine + 1) |= IQS626_CHx_ENG_1_ATI_BAND_TIGHTEN;
1053 if (ch_id == IQS626_CH_TP_2 || ch_id == IQS626_CH_TP_3)
1054 return iqs626_parse_trackpad(iqs626, ch_node, ch_id);
1056 if (ch_id == IQS626_CH_ULP_0) {
1057 sys_reg->ch_reg_ulp.hyst &= ~IQS626_ULP_PROJ_ENABLE;
1058 if (fwnode_property_present(ch_node, "azoteq,proj-enable"))
1059 sys_reg->ch_reg_ulp.hyst |= IQS626_ULP_PROJ_ENABLE;
1061 filter = &sys_reg->ch_reg_ulp.filter;
1063 rx_enable = &sys_reg->ch_reg_ulp.rx_enable;
1064 tx_enable = &sys_reg->ch_reg_ulp.tx_enable;
1066 i = ch_id - IQS626_CH_GEN_0;
1067 filter = &sys_reg->ch_reg_gen[i].filter;
1069 rx_enable = &sys_reg->ch_reg_gen[i].rx_enable;
1070 tx_enable = &sys_reg->ch_reg_gen[i].tx_enable;
1073 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-np-cnt",
1075 if (val > IQS626_FILT_STR_MAX) {
1076 dev_err(&client->dev,
1077 "Invalid %s channel filter strength: %u\n",
1078 fwnode_get_name(ch_node), val);
1082 *filter &= ~IQS626_FILT_STR_NP_CNT_MASK;
1083 *filter |= (val << IQS626_FILT_STR_NP_CNT_SHIFT);
1086 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-lp-cnt",
1088 if (val > IQS626_FILT_STR_MAX) {
1089 dev_err(&client->dev,
1090 "Invalid %s channel filter strength: %u\n",
1091 fwnode_get_name(ch_node), val);
1095 *filter &= ~IQS626_FILT_STR_LP_CNT_MASK;
1096 *filter |= (val << IQS626_FILT_STR_LP_CNT_SHIFT);
1099 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-np-lta",
1101 if (val > IQS626_FILT_STR_MAX) {
1102 dev_err(&client->dev,
1103 "Invalid %s channel filter strength: %u\n",
1104 fwnode_get_name(ch_node), val);
1108 *filter &= ~IQS626_FILT_STR_NP_LTA_MASK;
1109 *filter |= (val << IQS626_FILT_STR_NP_LTA_SHIFT);
1112 if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-lp-lta",
1114 if (val > IQS626_FILT_STR_MAX) {
1115 dev_err(&client->dev,
1116 "Invalid %s channel filter strength: %u\n",
1117 fwnode_get_name(ch_node), val);
1121 *filter &= ~IQS626_FILT_STR_LP_LTA_MASK;
1125 error = iqs626_parse_pins(iqs626, ch_node, "azoteq,rx-enable",
1130 error = iqs626_parse_pins(iqs626, ch_node, "azoteq,tx-enable",
1135 if (ch_id == IQS626_CH_ULP_0)
1138 *(engine + 2) &= ~IQS626_CHx_ENG_2_LOCAL_CAP_ENABLE;
1139 if (!fwnode_property_read_u32(ch_node, "azoteq,local-cap-size",
1141 unsigned int orig_val = val--;
1143 if (val > IQS626_CHx_ENG_2_LOCAL_CAP_MAX) {
1144 dev_err(&client->dev,
1145 "Invalid %s channel local cap. size: %u\n",
1146 fwnode_get_name(ch_node), orig_val);
1150 *(engine + 2) &= ~IQS626_CHx_ENG_2_LOCAL_CAP_MASK;
1151 *(engine + 2) |= (val << IQS626_CHx_ENG_2_LOCAL_CAP_SHIFT);
1153 *(engine + 2) |= IQS626_CHx_ENG_2_LOCAL_CAP_ENABLE;
1156 if (!fwnode_property_read_u32(ch_node, "azoteq,sense-mode", &val)) {
1157 if (val > IQS626_CHx_ENG_2_SENSE_MODE_MAX) {
1158 dev_err(&client->dev,
1159 "Invalid %s channel sensing mode: %u\n",
1160 fwnode_get_name(ch_node), val);
1164 *(engine + 2) &= ~IQS626_CHx_ENG_2_SENSE_MODE_MASK;
1165 *(engine + 2) |= val;
1168 if (!fwnode_property_read_u32(ch_node, "azoteq,tx-freq", &val)) {
1169 if (val > IQS626_CHx_ENG_3_TX_FREQ_MAX) {
1170 dev_err(&client->dev,
1171 "Invalid %s channel excitation frequency: %u\n",
1172 fwnode_get_name(ch_node), val);
1176 *(engine + 3) &= ~IQS626_CHx_ENG_3_TX_FREQ_MASK;
1177 *(engine + 3) |= (val << IQS626_CHx_ENG_3_TX_FREQ_SHIFT);
1180 *(engine + 3) &= ~IQS626_CHx_ENG_3_INV_LOGIC;
1181 if (fwnode_property_present(ch_node, "azoteq,invert-enable"))
1182 *(engine + 3) |= IQS626_CHx_ENG_3_INV_LOGIC;
1184 *(engine + 4) &= ~IQS626_CHx_ENG_4_COMP_DISABLE;
1185 if (fwnode_property_present(ch_node, "azoteq,comp-disable"))
1186 *(engine + 4) |= IQS626_CHx_ENG_4_COMP_DISABLE;
1188 *(engine + 4) &= ~IQS626_CHx_ENG_4_STATIC_ENABLE;
1189 if (fwnode_property_present(ch_node, "azoteq,static-enable"))
1190 *(engine + 4) |= IQS626_CHx_ENG_4_STATIC_ENABLE;
1192 i = ch_id - IQS626_CH_GEN_0;
1193 assoc_select = &sys_reg->ch_reg_gen[i].assoc_select;
1194 assoc_weight = &sys_reg->ch_reg_gen[i].assoc_weight;
1197 if (!fwnode_property_present(ch_node, "azoteq,assoc-select"))
1200 for (i = 0; i < ARRAY_SIZE(iqs626_channels); i++) {
1201 if (fwnode_property_match_string(ch_node, "azoteq,assoc-select",
1202 iqs626_channels[i].name) < 0)
1205 *assoc_select |= iqs626_channels[i].active;
1208 if (fwnode_property_read_u32(ch_node, "azoteq,assoc-weight", &val))
1211 if (val > IQS626_GEN_WEIGHT_MAX) {
1212 dev_err(&client->dev,
1213 "Invalid %s channel associated weight: %u\n",
1214 fwnode_get_name(ch_node), val);
1218 *assoc_weight = val;
1223 static int iqs626_parse_prop(struct iqs626_private *iqs626)
1225 struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
1226 struct i2c_client *client = iqs626->client;
1231 if (!device_property_read_u32(&client->dev, "azoteq,suspend-mode",
1233 if (val > IQS626_SYS_SETTINGS_PWR_MODE_MAX) {
1234 dev_err(&client->dev, "Invalid suspend mode: %u\n",
1239 iqs626->suspend_mode = val;
1242 error = regmap_raw_read(iqs626->regmap, IQS626_SYS_SETTINGS, sys_reg,
1247 general = be16_to_cpu(sys_reg->general);
1248 general &= IQS626_SYS_SETTINGS_ULP_UPDATE_MASK;
1250 if (device_property_present(&client->dev, "azoteq,clk-div"))
1251 general |= IQS626_SYS_SETTINGS_CLK_DIV;
1253 if (device_property_present(&client->dev, "azoteq,ulp-enable"))
1254 general |= IQS626_SYS_SETTINGS_ULP_AUTO;
1256 if (!device_property_read_u32(&client->dev, "azoteq,ulp-update",
1258 if (val > IQS626_SYS_SETTINGS_ULP_UPDATE_MAX) {
1259 dev_err(&client->dev, "Invalid update rate: %u\n", val);
1263 general &= ~IQS626_SYS_SETTINGS_ULP_UPDATE_MASK;
1264 general |= (val << IQS626_SYS_SETTINGS_ULP_UPDATE_SHIFT);
1267 sys_reg->misc_a &= ~IQS626_MISC_A_ATI_BAND_DISABLE;
1268 if (device_property_present(&client->dev, "azoteq,ati-band-disable"))
1269 sys_reg->misc_a |= IQS626_MISC_A_ATI_BAND_DISABLE;
1271 sys_reg->misc_a &= ~IQS626_MISC_A_ATI_LP_ONLY;
1272 if (device_property_present(&client->dev, "azoteq,ati-lp-only"))
1273 sys_reg->misc_a |= IQS626_MISC_A_ATI_LP_ONLY;
1275 if (!device_property_read_u32(&client->dev, "azoteq,gpio3-select",
1277 if (val > IQS626_MISC_A_GPIO3_SELECT_MAX) {
1278 dev_err(&client->dev, "Invalid GPIO3 selection: %u\n",
1283 sys_reg->misc_a &= ~IQS626_MISC_A_GPIO3_SELECT_MASK;
1284 sys_reg->misc_a |= val;
1287 if (!device_property_read_u32(&client->dev, "azoteq,reseed-select",
1289 if (val > IQS626_MISC_B_RESEED_UI_SEL_MAX) {
1290 dev_err(&client->dev, "Invalid reseed selection: %u\n",
1295 sys_reg->misc_b &= ~IQS626_MISC_B_RESEED_UI_SEL_MASK;
1296 sys_reg->misc_b |= (val << IQS626_MISC_B_RESEED_UI_SEL_SHIFT);
1299 sys_reg->misc_b &= ~IQS626_MISC_B_THRESH_EXTEND;
1300 if (device_property_present(&client->dev, "azoteq,thresh-extend"))
1301 sys_reg->misc_b |= IQS626_MISC_B_THRESH_EXTEND;
1303 sys_reg->misc_b &= ~IQS626_MISC_B_TRACKING_UI_ENABLE;
1304 if (device_property_present(&client->dev, "azoteq,tracking-enable"))
1305 sys_reg->misc_b |= IQS626_MISC_B_TRACKING_UI_ENABLE;
1307 sys_reg->misc_b &= ~IQS626_MISC_B_RESEED_OFFSET;
1308 if (device_property_present(&client->dev, "azoteq,reseed-offset"))
1309 sys_reg->misc_b |= IQS626_MISC_B_RESEED_OFFSET;
1311 if (!device_property_read_u32(&client->dev, "azoteq,rate-np-ms",
1313 if (val > IQS626_RATE_NP_MS_MAX) {
1314 dev_err(&client->dev, "Invalid report rate: %u\n", val);
1318 sys_reg->rate_np = val;
1321 if (!device_property_read_u32(&client->dev, "azoteq,rate-lp-ms",
1323 if (val > IQS626_RATE_LP_MS_MAX) {
1324 dev_err(&client->dev, "Invalid report rate: %u\n", val);
1328 sys_reg->rate_lp = val;
1331 if (!device_property_read_u32(&client->dev, "azoteq,rate-ulp-ms",
1333 if (val > IQS626_RATE_ULP_MS_MAX) {
1334 dev_err(&client->dev, "Invalid report rate: %u\n", val);
1338 sys_reg->rate_ulp = val / 16;
1341 if (!device_property_read_u32(&client->dev, "azoteq,timeout-pwr-ms",
1343 if (val > IQS626_TIMEOUT_PWR_MS_MAX) {
1344 dev_err(&client->dev, "Invalid timeout: %u\n", val);
1348 sys_reg->timeout_pwr = val / 512;
1351 if (!device_property_read_u32(&client->dev, "azoteq,timeout-lta-ms",
1353 if (val > IQS626_TIMEOUT_LTA_MS_MAX) {
1354 dev_err(&client->dev, "Invalid timeout: %u\n", val);
1358 sys_reg->timeout_lta = val / 512;
1361 sys_reg->event_mask = ~((u8)IQS626_EVENT_MASK_SYS);
1362 sys_reg->redo_ati = 0;
1364 sys_reg->reseed = 0;
1365 sys_reg->active = 0;
1367 for (i = 0; i < ARRAY_SIZE(iqs626_channels); i++) {
1368 struct fwnode_handle *ch_node __free(fwnode_handle) =
1369 device_get_named_child_node(&client->dev,
1370 iqs626_channels[i].name);
1374 error = iqs626_parse_channel(iqs626, ch_node, i);
1378 sys_reg->active |= iqs626_channels[i].active;
1381 general |= IQS626_SYS_SETTINGS_EVENT_MODE;
1384 * Enable streaming during normal-power mode if the trackpad is used to
1385 * report raw coordinates instead of gestures. In that case, the device
1386 * returns to event mode during low-power mode.
1388 if (sys_reg->active & iqs626_channels[IQS626_CH_TP_2].active &&
1389 sys_reg->event_mask & IQS626_EVENT_MASK_GESTURE)
1390 general |= IQS626_SYS_SETTINGS_EVENT_MODE_LP;
1392 general |= IQS626_SYS_SETTINGS_REDO_ATI;
1393 general |= IQS626_SYS_SETTINGS_ACK_RESET;
1395 sys_reg->general = cpu_to_be16(general);
1397 error = regmap_raw_write(iqs626->regmap, IQS626_SYS_SETTINGS,
1398 &iqs626->sys_reg, sizeof(iqs626->sys_reg));
1407 static int iqs626_input_init(struct iqs626_private *iqs626)
1409 struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
1410 struct i2c_client *client = iqs626->client;
1413 iqs626->keypad = devm_input_allocate_device(&client->dev);
1414 if (!iqs626->keypad)
1417 iqs626->keypad->keycodemax = ARRAY_SIZE(iqs626->kp_code);
1418 iqs626->keypad->keycode = iqs626->kp_code;
1419 iqs626->keypad->keycodesize = sizeof(**iqs626->kp_code);
1421 iqs626->keypad->name = "iqs626a_keypad";
1422 iqs626->keypad->id.bustype = BUS_I2C;
1424 for (i = 0; i < ARRAY_SIZE(iqs626_channels); i++) {
1425 if (!(sys_reg->active & iqs626_channels[i].active))
1428 for (j = 0; j < ARRAY_SIZE(iqs626_events); j++) {
1429 if (!iqs626->kp_type[i][j])
1432 input_set_capability(iqs626->keypad,
1433 iqs626->kp_type[i][j],
1434 iqs626->kp_code[i][j]);
1438 if (!(sys_reg->active & iqs626_channels[IQS626_CH_TP_2].active))
1441 iqs626->trackpad = devm_input_allocate_device(&client->dev);
1442 if (!iqs626->trackpad)
1445 iqs626->trackpad->keycodemax = ARRAY_SIZE(iqs626->tp_code);
1446 iqs626->trackpad->keycode = iqs626->tp_code;
1447 iqs626->trackpad->keycodesize = sizeof(*iqs626->tp_code);
1449 iqs626->trackpad->name = "iqs626a_trackpad";
1450 iqs626->trackpad->id.bustype = BUS_I2C;
1453 * Present the trackpad as a traditional pointing device if no gestures
1454 * have been mapped to a keycode.
1456 if (sys_reg->event_mask & IQS626_EVENT_MASK_GESTURE) {
1457 u8 tp_mask = iqs626_channels[IQS626_CH_TP_3].active;
1459 input_set_capability(iqs626->trackpad, EV_KEY, BTN_TOUCH);
1460 input_set_abs_params(iqs626->trackpad, ABS_Y, 0, 255, 0, 0);
1462 if ((sys_reg->active & tp_mask) == tp_mask)
1463 input_set_abs_params(iqs626->trackpad,
1464 ABS_X, 0, 255, 0, 0);
1466 input_set_abs_params(iqs626->trackpad,
1467 ABS_X, 0, 128, 0, 0);
1469 touchscreen_parse_properties(iqs626->trackpad, false,
1472 for (i = 0; i < IQS626_NUM_GESTURES; i++)
1473 if (iqs626->tp_code[i] != KEY_RESERVED)
1474 input_set_capability(iqs626->trackpad, EV_KEY,
1475 iqs626->tp_code[i]);
1478 error = input_register_device(iqs626->trackpad);
1480 dev_err(&client->dev, "Failed to register trackpad: %d\n",
1486 static int iqs626_report(struct iqs626_private *iqs626)
1488 struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
1489 struct i2c_client *client = iqs626->client;
1490 struct iqs626_flags flags;
1494 u8 *dir_mask = &flags.states[IQS626_ST_OFFS_DIR];
1496 error = regmap_raw_read(iqs626->regmap, IQS626_SYS_FLAGS, &flags,
1499 dev_err(&client->dev, "Failed to read device status: %d\n",
1505 * The device resets itself if its own watchdog bites, which can happen
1506 * in the event of an I2C communication error. In this case, the device
1507 * asserts a SHOW_RESET interrupt and all registers must be restored.
1509 if (be16_to_cpu(flags.system) & IQS626_SYS_FLAGS_SHOW_RESET) {
1510 dev_err(&client->dev, "Unexpected device reset\n");
1512 error = regmap_raw_write(iqs626->regmap, IQS626_SYS_SETTINGS,
1513 sys_reg, sizeof(*sys_reg));
1515 dev_err(&client->dev,
1516 "Failed to re-initialize device: %d\n", error);
1521 if (be16_to_cpu(flags.system) & IQS626_SYS_FLAGS_IN_ATI)
1525 * Unlike the ULP or generic channels, the Hall channel does not have a
1526 * direction flag. Instead, the direction (i.e. magnet polarity) can be
1527 * derived based on the sign of the 2's complement differential output.
1529 if (sys_reg->active & iqs626_channels[IQS626_CH_HALL].active) {
1530 error = regmap_raw_read(iqs626->regmap, IQS626_HALL_OUTPUT,
1531 &hall_output, sizeof(hall_output));
1533 dev_err(&client->dev,
1534 "Failed to read Hall output: %d\n", error);
1538 *dir_mask &= ~iqs626_channels[IQS626_CH_HALL].active;
1539 if (le16_to_cpu(hall_output) < 0x8000)
1540 *dir_mask |= iqs626_channels[IQS626_CH_HALL].active;
1543 for (i = 0; i < ARRAY_SIZE(iqs626_channels); i++) {
1544 if (!(sys_reg->active & iqs626_channels[i].active))
1547 for (j = 0; j < ARRAY_SIZE(iqs626_events); j++) {
1548 if (!iqs626->kp_type[i][j])
1551 state = flags.states[iqs626_events[j].st_offs];
1552 state &= iqs626_events[j].dir_up ? *dir_mask
1554 state &= iqs626_channels[i].active;
1556 input_event(iqs626->keypad, iqs626->kp_type[i][j],
1557 iqs626->kp_code[i][j], !!state);
1561 input_sync(iqs626->keypad);
1564 * The following completion signals that ATI has finished, any initial
1565 * switch states have been reported and the keypad can be registered.
1567 complete_all(&iqs626->ati_done);
1569 if (!(sys_reg->active & iqs626_channels[IQS626_CH_TP_2].active))
1572 if (sys_reg->event_mask & IQS626_EVENT_MASK_GESTURE) {
1573 state = flags.states[IQS626_ST_OFFS_TOUCH];
1574 state &= iqs626_channels[IQS626_CH_TP_2].active;
1576 input_report_key(iqs626->trackpad, BTN_TOUCH, state);
1579 touchscreen_report_pos(iqs626->trackpad, &iqs626->prop,
1581 flags.trackpad_y, false);
1583 for (i = 0; i < IQS626_NUM_GESTURES; i++)
1584 input_report_key(iqs626->trackpad, iqs626->tp_code[i],
1585 flags.gesture & BIT(i));
1587 if (flags.gesture & GENMASK(IQS626_GESTURE_TAP, 0)) {
1588 input_sync(iqs626->trackpad);
1591 * Momentary gestures are followed by a complementary
1592 * release cycle so as to emulate a full keystroke.
1594 for (i = 0; i < IQS626_GESTURE_HOLD; i++)
1595 input_report_key(iqs626->trackpad,
1596 iqs626->tp_code[i], 0);
1600 input_sync(iqs626->trackpad);
1605 static irqreturn_t iqs626_irq(int irq, void *context)
1607 struct iqs626_private *iqs626 = context;
1609 if (iqs626_report(iqs626))
1613 * The device does not deassert its interrupt (RDY) pin until shortly
1614 * after receiving an I2C stop condition; the following delay ensures
1615 * the interrupt handler does not return before this time.
1622 static const struct regmap_config iqs626_regmap_config = {
1625 .max_register = IQS626_MAX_REG,
1628 static int iqs626_probe(struct i2c_client *client)
1630 struct iqs626_ver_info ver_info;
1631 struct iqs626_private *iqs626;
1634 iqs626 = devm_kzalloc(&client->dev, sizeof(*iqs626), GFP_KERNEL);
1638 i2c_set_clientdata(client, iqs626);
1639 iqs626->client = client;
1641 iqs626->regmap = devm_regmap_init_i2c(client, &iqs626_regmap_config);
1642 if (IS_ERR(iqs626->regmap)) {
1643 error = PTR_ERR(iqs626->regmap);
1644 dev_err(&client->dev, "Failed to initialize register map: %d\n",
1649 init_completion(&iqs626->ati_done);
1651 error = regmap_raw_read(iqs626->regmap, IQS626_VER_INFO, &ver_info,
1656 if (ver_info.prod_num != IQS626_VER_INFO_PROD_NUM) {
1657 dev_err(&client->dev, "Unrecognized product number: 0x%02X\n",
1662 error = iqs626_parse_prop(iqs626);
1666 error = iqs626_input_init(iqs626);
1670 error = devm_request_threaded_irq(&client->dev, client->irq,
1671 NULL, iqs626_irq, IRQF_ONESHOT,
1672 client->name, iqs626);
1674 dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
1678 if (!wait_for_completion_timeout(&iqs626->ati_done,
1679 msecs_to_jiffies(2000))) {
1680 dev_err(&client->dev, "Failed to complete ATI\n");
1685 * The keypad may include one or more switches and is not registered
1686 * until ATI is complete and the initial switch states are read.
1688 error = input_register_device(iqs626->keypad);
1690 dev_err(&client->dev, "Failed to register keypad: %d\n", error);
1695 static int iqs626_suspend(struct device *dev)
1697 struct iqs626_private *iqs626 = dev_get_drvdata(dev);
1698 struct i2c_client *client = iqs626->client;
1702 if (!iqs626->suspend_mode)
1705 disable_irq(client->irq);
1708 * Automatic power mode switching must be disabled before the device is
1709 * forced into any particular power mode. In this case, the device will
1710 * transition into normal-power mode.
1712 error = regmap_update_bits(iqs626->regmap, IQS626_SYS_SETTINGS,
1713 IQS626_SYS_SETTINGS_DIS_AUTO, ~0);
1718 * The following check ensures the device has completed its transition
1719 * into normal-power mode before a manual mode switch is performed.
1721 error = regmap_read_poll_timeout(iqs626->regmap, IQS626_SYS_FLAGS, val,
1722 !(val & IQS626_SYS_FLAGS_PWR_MODE_MASK),
1723 IQS626_PWR_MODE_POLL_SLEEP_US,
1724 IQS626_PWR_MODE_POLL_TIMEOUT_US);
1728 error = regmap_update_bits(iqs626->regmap, IQS626_SYS_SETTINGS,
1729 IQS626_SYS_SETTINGS_PWR_MODE_MASK,
1730 iqs626->suspend_mode <<
1731 IQS626_SYS_SETTINGS_PWR_MODE_SHIFT);
1736 * This last check ensures the device has completed its transition into
1737 * the desired power mode to prevent any spurious interrupts from being
1738 * triggered after iqs626_suspend has already returned.
1740 error = regmap_read_poll_timeout(iqs626->regmap, IQS626_SYS_FLAGS, val,
1741 (val & IQS626_SYS_FLAGS_PWR_MODE_MASK)
1742 == (iqs626->suspend_mode <<
1743 IQS626_SYS_FLAGS_PWR_MODE_SHIFT),
1744 IQS626_PWR_MODE_POLL_SLEEP_US,
1745 IQS626_PWR_MODE_POLL_TIMEOUT_US);
1749 enable_irq(client->irq);
1754 static int iqs626_resume(struct device *dev)
1756 struct iqs626_private *iqs626 = dev_get_drvdata(dev);
1757 struct i2c_client *client = iqs626->client;
1761 if (!iqs626->suspend_mode)
1764 disable_irq(client->irq);
1766 error = regmap_update_bits(iqs626->regmap, IQS626_SYS_SETTINGS,
1767 IQS626_SYS_SETTINGS_PWR_MODE_MASK, 0);
1772 * This check ensures the device has returned to normal-power mode
1773 * before automatic power mode switching is re-enabled.
1775 error = regmap_read_poll_timeout(iqs626->regmap, IQS626_SYS_FLAGS, val,
1776 !(val & IQS626_SYS_FLAGS_PWR_MODE_MASK),
1777 IQS626_PWR_MODE_POLL_SLEEP_US,
1778 IQS626_PWR_MODE_POLL_TIMEOUT_US);
1782 error = regmap_update_bits(iqs626->regmap, IQS626_SYS_SETTINGS,
1783 IQS626_SYS_SETTINGS_DIS_AUTO, 0);
1788 * This step reports any events that may have been "swallowed" as a
1789 * result of polling PWR_MODE (which automatically acknowledges any
1790 * pending interrupts).
1792 error = iqs626_report(iqs626);
1796 enable_irq(client->irq);
1801 static DEFINE_SIMPLE_DEV_PM_OPS(iqs626_pm, iqs626_suspend, iqs626_resume);
1803 static const struct of_device_id iqs626_of_match[] = {
1804 { .compatible = "azoteq,iqs626a" },
1807 MODULE_DEVICE_TABLE(of, iqs626_of_match);
1809 static struct i2c_driver iqs626_i2c_driver = {
1812 .of_match_table = iqs626_of_match,
1813 .pm = pm_sleep_ptr(&iqs626_pm),
1815 .probe = iqs626_probe,
1817 module_i2c_driver(iqs626_i2c_driver);
1820 MODULE_DESCRIPTION("Azoteq IQS626A Capacitive Touch Controller");
1821 MODULE_LICENSE("GPL");