Merge tag '5.10-rc-smb3-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6
[linux-2.6-microblaze.git] / drivers / extcon / extcon-max14577.c
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC
4 //
5 // Copyright (C) 2013,2014 Samsung Electronics
6 // Chanwoo Choi <cw00.choi@samsung.com>
7 // Krzysztof Kozlowski <krzk@kernel.org>
8
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/i2c.h>
12 #include <linux/interrupt.h>
13 #include <linux/platform_device.h>
14 #include <linux/mfd/max14577.h>
15 #include <linux/mfd/max14577-private.h>
16 #include <linux/extcon-provider.h>
17
18 #define DELAY_MS_DEFAULT                17000           /* unit: millisecond */
19
20 enum max14577_muic_adc_debounce_time {
21         ADC_DEBOUNCE_TIME_5MS = 0,
22         ADC_DEBOUNCE_TIME_10MS,
23         ADC_DEBOUNCE_TIME_25MS,
24         ADC_DEBOUNCE_TIME_38_62MS,
25 };
26
27 enum max14577_muic_status {
28         MAX14577_MUIC_STATUS1 = 0,
29         MAX14577_MUIC_STATUS2 = 1,
30         MAX14577_MUIC_STATUS_END,
31 };
32
33 /**
34  * struct max14577_muic_irq
35  * @irq: the index of irq list of MUIC device.
36  * @name: the name of irq.
37  * @virq: the virtual irq to use irq domain
38  */
39 struct max14577_muic_irq {
40         unsigned int irq;
41         const char *name;
42         unsigned int virq;
43 };
44
45 static struct max14577_muic_irq max14577_muic_irqs[] = {
46         { MAX14577_IRQ_INT1_ADC,        "muic-ADC" },
47         { MAX14577_IRQ_INT1_ADCLOW,     "muic-ADCLOW" },
48         { MAX14577_IRQ_INT1_ADCERR,     "muic-ADCError" },
49         { MAX14577_IRQ_INT2_CHGTYP,     "muic-CHGTYP" },
50         { MAX14577_IRQ_INT2_CHGDETRUN,  "muic-CHGDETRUN" },
51         { MAX14577_IRQ_INT2_DCDTMR,     "muic-DCDTMR" },
52         { MAX14577_IRQ_INT2_DBCHG,      "muic-DBCHG" },
53         { MAX14577_IRQ_INT2_VBVOLT,     "muic-VBVOLT" },
54 };
55
56 static struct max14577_muic_irq max77836_muic_irqs[] = {
57         { MAX14577_IRQ_INT1_ADC,        "muic-ADC" },
58         { MAX14577_IRQ_INT1_ADCLOW,     "muic-ADCLOW" },
59         { MAX14577_IRQ_INT1_ADCERR,     "muic-ADCError" },
60         { MAX77836_IRQ_INT1_ADC1K,      "muic-ADC1K" },
61         { MAX14577_IRQ_INT2_CHGTYP,     "muic-CHGTYP" },
62         { MAX14577_IRQ_INT2_CHGDETRUN,  "muic-CHGDETRUN" },
63         { MAX14577_IRQ_INT2_DCDTMR,     "muic-DCDTMR" },
64         { MAX14577_IRQ_INT2_DBCHG,      "muic-DBCHG" },
65         { MAX14577_IRQ_INT2_VBVOLT,     "muic-VBVOLT" },
66         { MAX77836_IRQ_INT2_VIDRM,      "muic-VIDRM" },
67 };
68
69 struct max14577_muic_info {
70         struct device *dev;
71         struct max14577 *max14577;
72         struct extcon_dev *edev;
73         int prev_cable_type;
74         int prev_chg_type;
75         u8 status[MAX14577_MUIC_STATUS_END];
76
77         struct max14577_muic_irq *muic_irqs;
78         unsigned int muic_irqs_num;
79         bool irq_adc;
80         bool irq_chg;
81         struct work_struct irq_work;
82         struct mutex mutex;
83
84         /*
85          * Use delayed workqueue to detect cable state and then
86          * notify cable state to notifiee/platform through uevent.
87          * After completing the booting of platform, the extcon provider
88          * driver should notify cable state to upper layer.
89          */
90         struct delayed_work wq_detcable;
91
92         /*
93          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
94          * h/w path of COMP2/COMN1 on CONTROL1 register.
95          */
96         int path_usb;
97         int path_uart;
98 };
99
100 enum max14577_muic_cable_group {
101         MAX14577_CABLE_GROUP_ADC = 0,
102         MAX14577_CABLE_GROUP_CHG,
103 };
104
105 /* Define supported accessory type */
106 enum max14577_muic_acc_type {
107         MAX14577_MUIC_ADC_GROUND = 0x0,
108         MAX14577_MUIC_ADC_SEND_END_BUTTON,
109         MAX14577_MUIC_ADC_REMOTE_S1_BUTTON,
110         MAX14577_MUIC_ADC_REMOTE_S2_BUTTON,
111         MAX14577_MUIC_ADC_REMOTE_S3_BUTTON,
112         MAX14577_MUIC_ADC_REMOTE_S4_BUTTON,
113         MAX14577_MUIC_ADC_REMOTE_S5_BUTTON,
114         MAX14577_MUIC_ADC_REMOTE_S6_BUTTON,
115         MAX14577_MUIC_ADC_REMOTE_S7_BUTTON,
116         MAX14577_MUIC_ADC_REMOTE_S8_BUTTON,
117         MAX14577_MUIC_ADC_REMOTE_S9_BUTTON,
118         MAX14577_MUIC_ADC_REMOTE_S10_BUTTON,
119         MAX14577_MUIC_ADC_REMOTE_S11_BUTTON,
120         MAX14577_MUIC_ADC_REMOTE_S12_BUTTON,
121         MAX14577_MUIC_ADC_RESERVED_ACC_1,
122         MAX14577_MUIC_ADC_RESERVED_ACC_2,
123         MAX14577_MUIC_ADC_RESERVED_ACC_3,
124         MAX14577_MUIC_ADC_RESERVED_ACC_4,
125         MAX14577_MUIC_ADC_RESERVED_ACC_5,
126         MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2,
127         MAX14577_MUIC_ADC_PHONE_POWERED_DEV,
128         MAX14577_MUIC_ADC_TTY_CONVERTER,
129         MAX14577_MUIC_ADC_UART_CABLE,
130         MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG,
131         MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF,
132         MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON,
133         MAX14577_MUIC_ADC_AV_CABLE_NOLOAD,
134         MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG,
135         MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF,
136         MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON,
137         MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */
138         MAX14577_MUIC_ADC_OPEN,
139 };
140
141 static const unsigned int max14577_extcon_cable[] = {
142         EXTCON_USB,
143         EXTCON_CHG_USB_SDP,
144         EXTCON_CHG_USB_DCP,
145         EXTCON_CHG_USB_FAST,
146         EXTCON_CHG_USB_SLOW,
147         EXTCON_CHG_USB_CDP,
148         EXTCON_JIG,
149         EXTCON_NONE,
150 };
151
152 /*
153  * max14577_muic_set_debounce_time - Set the debounce time of ADC
154  * @info: the instance including private data of max14577 MUIC
155  * @time: the debounce time of ADC
156  */
157 static int max14577_muic_set_debounce_time(struct max14577_muic_info *info,
158                 enum max14577_muic_adc_debounce_time time)
159 {
160         u8 ret;
161
162         switch (time) {
163         case ADC_DEBOUNCE_TIME_5MS:
164         case ADC_DEBOUNCE_TIME_10MS:
165         case ADC_DEBOUNCE_TIME_25MS:
166         case ADC_DEBOUNCE_TIME_38_62MS:
167                 ret = max14577_update_reg(info->max14577->regmap,
168                                           MAX14577_MUIC_REG_CONTROL3,
169                                           CTRL3_ADCDBSET_MASK,
170                                           time << CTRL3_ADCDBSET_SHIFT);
171                 if (ret) {
172                         dev_err(info->dev, "failed to set ADC debounce time\n");
173                         return ret;
174                 }
175                 break;
176         default:
177                 dev_err(info->dev, "invalid ADC debounce time\n");
178                 return -EINVAL;
179         }
180
181         return 0;
182 };
183
184 /*
185  * max14577_muic_set_path - Set hardware line according to attached cable
186  * @info: the instance including private data of max14577 MUIC
187  * @value: the path according to attached cable
188  * @attached: the state of cable (true:attached, false:detached)
189  *
190  * The max14577 MUIC device share outside H/W line among a varity of cables
191  * so, this function set internal path of H/W line according to the type of
192  * attached cable.
193  */
194 static int max14577_muic_set_path(struct max14577_muic_info *info,
195                 u8 val, bool attached)
196 {
197         u8 ctrl1, ctrl2 = 0;
198         int ret;
199
200         /* Set open state to path before changing hw path */
201         ret = max14577_update_reg(info->max14577->regmap,
202                                 MAX14577_MUIC_REG_CONTROL1,
203                                 CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN);
204         if (ret < 0) {
205                 dev_err(info->dev, "failed to update MUIC register\n");
206                 return ret;
207         }
208
209         if (attached)
210                 ctrl1 = val;
211         else
212                 ctrl1 = CTRL1_SW_OPEN;
213
214         ret = max14577_update_reg(info->max14577->regmap,
215                                 MAX14577_MUIC_REG_CONTROL1,
216                                 CLEAR_IDBEN_MICEN_MASK, ctrl1);
217         if (ret < 0) {
218                 dev_err(info->dev, "failed to update MUIC register\n");
219                 return ret;
220         }
221
222         if (attached)
223                 ctrl2 |= CTRL2_CPEN_MASK;       /* LowPwr=0, CPEn=1 */
224         else
225                 ctrl2 |= CTRL2_LOWPWR_MASK;     /* LowPwr=1, CPEn=0 */
226
227         ret = max14577_update_reg(info->max14577->regmap,
228                         MAX14577_REG_CONTROL2,
229                         CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2);
230         if (ret < 0) {
231                 dev_err(info->dev, "failed to update MUIC register\n");
232                 return ret;
233         }
234
235         dev_dbg(info->dev,
236                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
237                 ctrl1, ctrl2, attached ? "attached" : "detached");
238
239         return 0;
240 }
241
242 /*
243  * max14577_muic_get_cable_type - Return cable type and check cable state
244  * @info: the instance including private data of max14577 MUIC
245  * @group: the path according to attached cable
246  * @attached: store cable state and return
247  *
248  * This function check the cable state either attached or detached,
249  * and then divide precise type of cable according to cable group.
250  *      - max14577_CABLE_GROUP_ADC
251  *      - max14577_CABLE_GROUP_CHG
252  */
253 static int max14577_muic_get_cable_type(struct max14577_muic_info *info,
254                 enum max14577_muic_cable_group group, bool *attached)
255 {
256         int cable_type = 0;
257         int adc;
258         int chg_type;
259
260         switch (group) {
261         case MAX14577_CABLE_GROUP_ADC:
262                 /*
263                  * Read ADC value to check cable type and decide cable state
264                  * according to cable type
265                  */
266                 adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;
267                 adc >>= STATUS1_ADC_SHIFT;
268
269                 /*
270                  * Check current cable state/cable type and store cable type
271                  * (info->prev_cable_type) for handling cable when cable is
272                  * detached.
273                  */
274                 if (adc == MAX14577_MUIC_ADC_OPEN) {
275                         *attached = false;
276
277                         cable_type = info->prev_cable_type;
278                         info->prev_cable_type = MAX14577_MUIC_ADC_OPEN;
279                 } else {
280                         *attached = true;
281
282                         cable_type = info->prev_cable_type = adc;
283                 }
284                 break;
285         case MAX14577_CABLE_GROUP_CHG:
286                 /*
287                  * Read charger type to check cable type and decide cable state
288                  * according to type of charger cable.
289                  */
290                 chg_type = info->status[MAX14577_MUIC_STATUS2] &
291                         STATUS2_CHGTYP_MASK;
292                 chg_type >>= STATUS2_CHGTYP_SHIFT;
293
294                 if (chg_type == MAX14577_CHARGER_TYPE_NONE) {
295                         *attached = false;
296
297                         cable_type = info->prev_chg_type;
298                         info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE;
299                 } else {
300                         *attached = true;
301
302                         /*
303                          * Check current cable state/cable type and store cable
304                          * type(info->prev_chg_type) for handling cable when
305                          * charger cable is detached.
306                          */
307                         cable_type = info->prev_chg_type = chg_type;
308                 }
309
310                 break;
311         default:
312                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
313                 cable_type = -EINVAL;
314                 break;
315         }
316
317         return cable_type;
318 }
319
320 static int max14577_muic_jig_handler(struct max14577_muic_info *info,
321                 int cable_type, bool attached)
322 {
323         int ret = 0;
324         u8 path = CTRL1_SW_OPEN;
325
326         dev_dbg(info->dev,
327                 "external connector is %s (adc:0x%02x)\n",
328                 attached ? "attached" : "detached", cable_type);
329
330         switch (cable_type) {
331         case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
332         case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
333                 /* PATH:AP_USB */
334                 path = CTRL1_SW_USB;
335                 break;
336         case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
337                 /* PATH:AP_UART */
338                 path = CTRL1_SW_UART;
339                 break;
340         default:
341                 dev_err(info->dev, "failed to detect %s jig cable\n",
342                         attached ? "attached" : "detached");
343                 return -EINVAL;
344         }
345
346         ret = max14577_muic_set_path(info, path, attached);
347         if (ret < 0)
348                 return ret;
349
350         extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
351
352         return 0;
353 }
354
355 static int max14577_muic_adc_handler(struct max14577_muic_info *info)
356 {
357         int cable_type;
358         bool attached;
359         int ret = 0;
360
361         /* Check accessory state which is either detached or attached */
362         cable_type = max14577_muic_get_cable_type(info,
363                                 MAX14577_CABLE_GROUP_ADC, &attached);
364
365         dev_dbg(info->dev,
366                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
367                 attached ? "attached" : "detached", cable_type,
368                 info->prev_cable_type);
369
370         switch (cable_type) {
371         case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:
372         case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:
373         case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:
374                 /* JIG */
375                 ret = max14577_muic_jig_handler(info, cable_type, attached);
376                 if (ret < 0)
377                         return ret;
378                 break;
379         case MAX14577_MUIC_ADC_GROUND:
380         case MAX14577_MUIC_ADC_SEND_END_BUTTON:
381         case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON:
382         case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON:
383         case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON:
384         case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON:
385         case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON:
386         case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON:
387         case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON:
388         case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON:
389         case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON:
390         case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON:
391         case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON:
392         case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON:
393         case MAX14577_MUIC_ADC_RESERVED_ACC_1:
394         case MAX14577_MUIC_ADC_RESERVED_ACC_2:
395         case MAX14577_MUIC_ADC_RESERVED_ACC_3:
396         case MAX14577_MUIC_ADC_RESERVED_ACC_4:
397         case MAX14577_MUIC_ADC_RESERVED_ACC_5:
398         case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2:
399         case MAX14577_MUIC_ADC_PHONE_POWERED_DEV:
400         case MAX14577_MUIC_ADC_TTY_CONVERTER:
401         case MAX14577_MUIC_ADC_UART_CABLE:
402         case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG:
403         case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD:
404         case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG:
405         case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON:
406         case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1:
407                 /*
408                  * This accessory isn't used in general case if it is specially
409                  * needed to detect additional accessory, should implement
410                  * proper operation when this accessory is attached/detached.
411                  */
412                 dev_info(info->dev,
413                         "accessory is %s but it isn't used (adc:0x%x)\n",
414                         attached ? "attached" : "detached", cable_type);
415                 return -EAGAIN;
416         default:
417                 dev_err(info->dev,
418                         "failed to detect %s accessory (adc:0x%x)\n",
419                         attached ? "attached" : "detached", cable_type);
420                 return -EINVAL;
421         }
422
423         return 0;
424 }
425
426 static int max14577_muic_chg_handler(struct max14577_muic_info *info)
427 {
428         int chg_type;
429         bool attached;
430         int ret = 0;
431
432         chg_type = max14577_muic_get_cable_type(info,
433                                 MAX14577_CABLE_GROUP_CHG, &attached);
434
435         dev_dbg(info->dev,
436                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
437                         attached ? "attached" : "detached",
438                         chg_type, info->prev_chg_type);
439
440         switch (chg_type) {
441         case MAX14577_CHARGER_TYPE_USB:
442                 /* PATH:AP_USB */
443                 ret = max14577_muic_set_path(info, info->path_usb, attached);
444                 if (ret < 0)
445                         return ret;
446
447                 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
448                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
449                                         attached);
450                 break;
451         case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
452                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
453                                         attached);
454                 break;
455         case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
456                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
457                                         attached);
458                 break;
459         case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
460                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
461                                         attached);
462                 break;
463         case MAX14577_CHARGER_TYPE_SPECIAL_1A:
464                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
465                                         attached);
466                 break;
467         case MAX14577_CHARGER_TYPE_NONE:
468         case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
469                 break;
470         default:
471                 dev_err(info->dev,
472                         "failed to detect %s accessory (chg_type:0x%x)\n",
473                         attached ? "attached" : "detached", chg_type);
474                 return -EINVAL;
475         }
476
477         return 0;
478 }
479
480 static void max14577_muic_irq_work(struct work_struct *work)
481 {
482         struct max14577_muic_info *info = container_of(work,
483                         struct max14577_muic_info, irq_work);
484         int ret = 0;
485
486         if (!info->edev)
487                 return;
488
489         mutex_lock(&info->mutex);
490
491         ret = max14577_bulk_read(info->max14577->regmap,
492                         MAX14577_MUIC_REG_STATUS1, info->status, 2);
493         if (ret) {
494                 dev_err(info->dev, "failed to read MUIC register\n");
495                 mutex_unlock(&info->mutex);
496                 return;
497         }
498
499         if (info->irq_adc) {
500                 ret = max14577_muic_adc_handler(info);
501                 info->irq_adc = false;
502         }
503         if (info->irq_chg) {
504                 ret = max14577_muic_chg_handler(info);
505                 info->irq_chg = false;
506         }
507
508         if (ret < 0)
509                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
510
511         mutex_unlock(&info->mutex);
512 }
513
514 /*
515  * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
516  * Returns 0 if irq_type does not match registered IRQ for this device type.
517  */
518 static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type)
519 {
520         switch (irq_type) {
521         case MAX14577_IRQ_INT1_ADC:
522         case MAX14577_IRQ_INT1_ADCLOW:
523         case MAX14577_IRQ_INT1_ADCERR:
524                 /*
525                  * Handle all of accessory except for
526                  * type of charger accessory.
527                  */
528                 info->irq_adc = true;
529                 return 1;
530         case MAX14577_IRQ_INT2_CHGTYP:
531         case MAX14577_IRQ_INT2_CHGDETRUN:
532         case MAX14577_IRQ_INT2_DCDTMR:
533         case MAX14577_IRQ_INT2_DBCHG:
534         case MAX14577_IRQ_INT2_VBVOLT:
535                 /* Handle charger accessory */
536                 info->irq_chg = true;
537                 return 1;
538         default:
539                 return 0;
540         }
541 }
542
543 /*
544  * Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
545  * Returns 0 if irq_type does not match registered IRQ for this device type.
546  */
547 static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type)
548 {
549         /* First check common max14577 interrupts */
550         if (max14577_parse_irq(info, irq_type))
551                 return 1;
552
553         switch (irq_type) {
554         case MAX77836_IRQ_INT1_ADC1K:
555                 info->irq_adc = true;
556                 return 1;
557         case MAX77836_IRQ_INT2_VIDRM:
558                 /* Handle charger accessory */
559                 info->irq_chg = true;
560                 return 1;
561         default:
562                 return 0;
563         }
564 }
565
566 static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
567 {
568         struct max14577_muic_info *info = data;
569         int i, irq_type = -1;
570         bool irq_parsed;
571
572         /*
573          * We may be called multiple times for different nested IRQ-s.
574          * Including changes in INT1_ADC and INT2_CGHTYP at once.
575          * However we only need to know whether it was ADC, charger
576          * or both interrupts so decode IRQ and turn on proper flags.
577          */
578         for (i = 0; i < info->muic_irqs_num; i++)
579                 if (irq == info->muic_irqs[i].virq)
580                         irq_type = info->muic_irqs[i].irq;
581
582         switch (info->max14577->dev_type) {
583         case MAXIM_DEVICE_TYPE_MAX77836:
584                 irq_parsed = max77836_parse_irq(info, irq_type);
585                 break;
586         case MAXIM_DEVICE_TYPE_MAX14577:
587         default:
588                 irq_parsed = max14577_parse_irq(info, irq_type);
589                 break;
590         }
591
592         if (!irq_parsed) {
593                 dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
594                                 irq_type);
595                 return IRQ_HANDLED;
596         }
597         schedule_work(&info->irq_work);
598
599         return IRQ_HANDLED;
600 }
601
602 static int max14577_muic_detect_accessory(struct max14577_muic_info *info)
603 {
604         int ret = 0;
605         int adc;
606         int chg_type;
607         bool attached;
608
609         mutex_lock(&info->mutex);
610
611         /* Read STATUSx register to detect accessory */
612         ret = max14577_bulk_read(info->max14577->regmap,
613                         MAX14577_MUIC_REG_STATUS1, info->status, 2);
614         if (ret) {
615                 dev_err(info->dev, "failed to read MUIC register\n");
616                 mutex_unlock(&info->mutex);
617                 return ret;
618         }
619
620         adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
621                                         &attached);
622         if (attached && adc != MAX14577_MUIC_ADC_OPEN) {
623                 ret = max14577_muic_adc_handler(info);
624                 if (ret < 0) {
625                         dev_err(info->dev, "Cannot detect accessory\n");
626                         mutex_unlock(&info->mutex);
627                         return ret;
628                 }
629         }
630
631         chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG,
632                                         &attached);
633         if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) {
634                 ret = max14577_muic_chg_handler(info);
635                 if (ret < 0) {
636                         dev_err(info->dev, "Cannot detect charger accessory\n");
637                         mutex_unlock(&info->mutex);
638                         return ret;
639                 }
640         }
641
642         mutex_unlock(&info->mutex);
643
644         return 0;
645 }
646
647 static void max14577_muic_detect_cable_wq(struct work_struct *work)
648 {
649         struct max14577_muic_info *info = container_of(to_delayed_work(work),
650                                 struct max14577_muic_info, wq_detcable);
651
652         max14577_muic_detect_accessory(info);
653 }
654
655 static int max14577_muic_probe(struct platform_device *pdev)
656 {
657         struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
658         struct max14577_muic_info *info;
659         int delay_jiffies;
660         int cable_type;
661         bool attached;
662         int ret;
663         int i;
664         u8 id;
665
666         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
667         if (!info)
668                 return -ENOMEM;
669
670         info->dev = &pdev->dev;
671         info->max14577 = max14577;
672
673         platform_set_drvdata(pdev, info);
674         mutex_init(&info->mutex);
675
676         INIT_WORK(&info->irq_work, max14577_muic_irq_work);
677
678         switch (max14577->dev_type) {
679         case MAXIM_DEVICE_TYPE_MAX77836:
680                 info->muic_irqs = max77836_muic_irqs;
681                 info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs);
682                 break;
683         case MAXIM_DEVICE_TYPE_MAX14577:
684         default:
685                 info->muic_irqs = max14577_muic_irqs;
686                 info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs);
687         }
688
689         /* Support irq domain for max14577 MUIC device */
690         for (i = 0; i < info->muic_irqs_num; i++) {
691                 struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];
692                 int virq = 0;
693
694                 virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
695                 if (virq <= 0)
696                         return -EINVAL;
697                 muic_irq->virq = virq;
698
699                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
700                                 max14577_muic_irq_handler,
701                                 IRQF_NO_SUSPEND,
702                                 muic_irq->name, info);
703                 if (ret) {
704                         dev_err(&pdev->dev,
705                                 "failed: irq request (IRQ: %d, error :%d)\n",
706                                 muic_irq->irq, ret);
707                         return ret;
708                 }
709         }
710
711         /* Initialize extcon device */
712         info->edev = devm_extcon_dev_allocate(&pdev->dev,
713                                               max14577_extcon_cable);
714         if (IS_ERR(info->edev)) {
715                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
716                 return PTR_ERR(info->edev);
717         }
718
719         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
720         if (ret) {
721                 dev_err(&pdev->dev, "failed to register extcon device\n");
722                 return ret;
723         }
724
725         /* Default h/w line path */
726         info->path_usb = CTRL1_SW_USB;
727         info->path_uart = CTRL1_SW_UART;
728         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
729
730         /* Set initial path for UART when JIG is connected to get serial logs */
731         ret = max14577_bulk_read(info->max14577->regmap,
732                         MAX14577_MUIC_REG_STATUS1, info->status, 2);
733         if (ret) {
734                 dev_err(info->dev, "Cannot read STATUS registers\n");
735                 return ret;
736         }
737         cable_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
738                                          &attached);
739         if (attached && cable_type == MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF)
740                 max14577_muic_set_path(info, info->path_uart, true);
741
742         /* Check revision number of MUIC device*/
743         ret = max14577_read_reg(info->max14577->regmap,
744                         MAX14577_REG_DEVICEID, &id);
745         if (ret < 0) {
746                 dev_err(&pdev->dev, "failed to read revision number\n");
747                 return ret;
748         }
749         dev_info(info->dev, "device ID : 0x%x\n", id);
750
751         /* Set ADC debounce time */
752         max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
753
754         /*
755          * Detect accessory after completing the initialization of platform
756          *
757          * - Use delayed workqueue to detect cable state and then
758          * notify cable state to notifiee/platform through uevent.
759          * After completing the booting of platform, the extcon provider
760          * driver should notify cable state to upper layer.
761          */
762         INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq);
763         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
764                         delay_jiffies);
765
766         return ret;
767 }
768
769 static int max14577_muic_remove(struct platform_device *pdev)
770 {
771         struct max14577_muic_info *info = platform_get_drvdata(pdev);
772
773         cancel_work_sync(&info->irq_work);
774
775         return 0;
776 }
777
778 static const struct platform_device_id max14577_muic_id[] = {
779         { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, },
780         { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, },
781         { }
782 };
783 MODULE_DEVICE_TABLE(platform, max14577_muic_id);
784
785 static const struct of_device_id of_max14577_muic_dt_match[] = {
786         { .compatible = "maxim,max14577-muic",
787           .data = (void *)MAXIM_DEVICE_TYPE_MAX14577, },
788         { .compatible = "maxim,max77836-muic",
789           .data = (void *)MAXIM_DEVICE_TYPE_MAX77836, },
790         { },
791 };
792 MODULE_DEVICE_TABLE(of, of_max14577_muic_dt_match);
793
794 static struct platform_driver max14577_muic_driver = {
795         .driver         = {
796                 .name   = "max14577-muic",
797                 .of_match_table = of_max14577_muic_dt_match,
798         },
799         .probe          = max14577_muic_probe,
800         .remove         = max14577_muic_remove,
801         .id_table       = max14577_muic_id,
802 };
803
804 module_platform_driver(max14577_muic_driver);
805
806 MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver");
807 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <krzk@kernel.org>");
808 MODULE_LICENSE("GPL");
809 MODULE_ALIAS("platform:extcon-max14577");