Merge remote-tracking branch 'asoc/fix/rt5645' into asoc-linus
[firefly-linux-kernel-4.4.55.git] / drivers / extcon / extcon-sm5502.c
1 /*
2  * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
3  *
4  * Copyright (c) 2014 Samsung Electronics Co., Ltd
5  * Author: Chanwoo Choi <cw00.choi@samsung.com>
6  *
7  * This program is free software; you can redistribute  it and/or modify it
8  * under  the terms of  the GNU General  Public License as published by the
9  * Free Software Foundation;  either version 2 of the  License, or (at your
10  * option) any later version.
11  */
12
13 #include <linux/err.h>
14 #include <linux/i2c.h>
15 #include <linux/interrupt.h>
16 #include <linux/irqdomain.h>
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/regmap.h>
21 #include <linux/slab.h>
22 #include <linux/extcon.h>
23
24 #include "extcon-sm5502.h"
25
26 #define DELAY_MS_DEFAULT                17000   /* unit: millisecond */
27
28 struct muic_irq {
29         unsigned int irq;
30         const char *name;
31         unsigned int virq;
32 };
33
34 struct reg_data {
35         u8 reg;
36         unsigned int val;
37         bool invert;
38 };
39
40 struct sm5502_muic_info {
41         struct device *dev;
42         struct extcon_dev *edev;
43
44         struct i2c_client *i2c;
45         struct regmap *regmap;
46
47         struct regmap_irq_chip_data *irq_data;
48         struct muic_irq *muic_irqs;
49         unsigned int num_muic_irqs;
50         int irq;
51         bool irq_attach;
52         bool irq_detach;
53         struct work_struct irq_work;
54
55         struct reg_data *reg_data;
56         unsigned int num_reg_data;
57
58         struct mutex mutex;
59
60         /*
61          * Use delayed workqueue to detect cable state and then
62          * notify cable state to notifiee/platform through uevent.
63          * After completing the booting of platform, the extcon provider
64          * driver should notify cable state to upper layer.
65          */
66         struct delayed_work wq_detcable;
67 };
68
69 /* Default value of SM5502 register to bring up MUIC device. */
70 static struct reg_data sm5502_reg_data[] = {
71         {
72                 .reg = SM5502_REG_CONTROL,
73                 .val = SM5502_REG_CONTROL_MASK_INT_MASK,
74                 .invert = false,
75         }, {
76                 .reg = SM5502_REG_INTMASK1,
77                 .val = SM5502_REG_INTM1_KP_MASK
78                         | SM5502_REG_INTM1_LKP_MASK
79                         | SM5502_REG_INTM1_LKR_MASK,
80                 .invert = true,
81         }, {
82                 .reg = SM5502_REG_INTMASK2,
83                 .val = SM5502_REG_INTM2_VBUS_DET_MASK
84                         | SM5502_REG_INTM2_REV_ACCE_MASK
85                         | SM5502_REG_INTM2_ADC_CHG_MASK
86                         | SM5502_REG_INTM2_STUCK_KEY_MASK
87                         | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
88                         | SM5502_REG_INTM2_MHL_MASK,
89                 .invert = true,
90         },
91         { }
92 };
93
94 /* List of detectable cables */
95 static const unsigned int sm5502_extcon_cable[] = {
96         EXTCON_USB,
97         EXTCON_USB_HOST,
98         EXTCON_CHG_USB_DCP,
99         EXTCON_NONE,
100 };
101
102 /* Define supported accessory type */
103 enum sm5502_muic_acc_type {
104         SM5502_MUIC_ADC_GROUND = 0x0,
105         SM5502_MUIC_ADC_SEND_END_BUTTON,
106         SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
107         SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
108         SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
109         SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
110         SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
111         SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
112         SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
113         SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
114         SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
115         SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
116         SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
117         SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
118         SM5502_MUIC_ADC_RESERVED_ACC_1,
119         SM5502_MUIC_ADC_RESERVED_ACC_2,
120         SM5502_MUIC_ADC_RESERVED_ACC_3,
121         SM5502_MUIC_ADC_RESERVED_ACC_4,
122         SM5502_MUIC_ADC_RESERVED_ACC_5,
123         SM5502_MUIC_ADC_AUDIO_TYPE2,
124         SM5502_MUIC_ADC_PHONE_POWERED_DEV,
125         SM5502_MUIC_ADC_TTY_CONVERTER,
126         SM5502_MUIC_ADC_UART_CABLE,
127         SM5502_MUIC_ADC_TYPE1_CHARGER,
128         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
129         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
130         SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
131         SM5502_MUIC_ADC_TYPE2_CHARGER,
132         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
133         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
134         SM5502_MUIC_ADC_AUDIO_TYPE1,
135         SM5502_MUIC_ADC_OPEN = 0x1f,
136
137         /* The below accessories have same ADC value (0x1f or 0x1e).
138            So, Device type1 is used to separate specific accessory. */
139                                                         /* |---------|--ADC| */
140                                                         /* |    [7:5]|[4:0]| */
141         SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
142         SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
143                                                         /* |Dev Type1|--ADC| */
144         SM5502_MUIC_ADC_OPEN_USB = 0x5f,                /* |      010|11111| */
145         SM5502_MUIC_ADC_OPEN_TA = 0xdf,                 /* |      110|11111| */
146         SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,            /* |      111|11111| */
147 };
148
149 /* List of supported interrupt for SM5502 */
150 static struct muic_irq sm5502_muic_irqs[] = {
151         { SM5502_IRQ_INT1_ATTACH,       "muic-attach" },
152         { SM5502_IRQ_INT1_DETACH,       "muic-detach" },
153         { SM5502_IRQ_INT1_KP,           "muic-kp" },
154         { SM5502_IRQ_INT1_LKP,          "muic-lkp" },
155         { SM5502_IRQ_INT1_LKR,          "muic-lkr" },
156         { SM5502_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
157         { SM5502_IRQ_INT1_OCP_EVENT,    "muic-ocp-event" },
158         { SM5502_IRQ_INT1_OVP_OCP_DIS,  "muic-ovp-ocp-dis" },
159         { SM5502_IRQ_INT2_VBUS_DET,     "muic-vbus-det" },
160         { SM5502_IRQ_INT2_REV_ACCE,     "muic-rev-acce" },
161         { SM5502_IRQ_INT2_ADC_CHG,      "muic-adc-chg" },
162         { SM5502_IRQ_INT2_STUCK_KEY,    "muic-stuck-key" },
163         { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
164         { SM5502_IRQ_INT2_MHL,          "muic-mhl" },
165 };
166
167 /* Define interrupt list of SM5502 to register regmap_irq */
168 static const struct regmap_irq sm5502_irqs[] = {
169         /* INT1 interrupts */
170         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
171         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
172         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
173         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
174         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
175         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
176         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
177         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
178
179         /* INT2 interrupts */
180         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
181         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
182         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
183         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
184         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
185         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
186 };
187
188 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
189         .name                   = "sm5502",
190         .status_base            = SM5502_REG_INT1,
191         .mask_base              = SM5502_REG_INTMASK1,
192         .mask_invert            = false,
193         .num_regs               = 2,
194         .irqs                   = sm5502_irqs,
195         .num_irqs               = ARRAY_SIZE(sm5502_irqs),
196 };
197
198 /* Define regmap configuration of SM5502 for I2C communication  */
199 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
200 {
201         switch (reg) {
202         case SM5502_REG_INTMASK1:
203         case SM5502_REG_INTMASK2:
204                 return true;
205         default:
206                 break;
207         }
208         return false;
209 }
210
211 static const struct regmap_config sm5502_muic_regmap_config = {
212         .reg_bits       = 8,
213         .val_bits       = 8,
214         .volatile_reg   = sm5502_muic_volatile_reg,
215         .max_register   = SM5502_REG_END,
216 };
217
218 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
219 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
220                                 unsigned int con_sw, unsigned int vbus_sw,
221                                 bool attached)
222 {
223         int ret;
224
225         if (!attached) {
226                 con_sw  = DM_DP_SWITCH_OPEN;
227                 vbus_sw = VBUSIN_SWITCH_OPEN;
228         }
229
230         switch (con_sw) {
231         case DM_DP_SWITCH_OPEN:
232         case DM_DP_SWITCH_USB:
233         case DM_DP_SWITCH_AUDIO:
234         case DM_DP_SWITCH_UART:
235                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
236                                          SM5502_REG_MANUAL_SW1_DP_MASK |
237                                          SM5502_REG_MANUAL_SW1_DM_MASK,
238                                          con_sw);
239                 if (ret < 0) {
240                         dev_err(info->dev,
241                                 "cannot update DM_CON/DP_CON switch\n");
242                         return ret;
243                 }
244                 break;
245         default:
246                 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
247                                 con_sw);
248                 return -EINVAL;
249         };
250
251         switch (vbus_sw) {
252         case VBUSIN_SWITCH_OPEN:
253         case VBUSIN_SWITCH_VBUSOUT:
254         case VBUSIN_SWITCH_MIC:
255         case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
256                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
257                                          SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
258                                          vbus_sw);
259                 if (ret < 0) {
260                         dev_err(info->dev,
261                                 "cannot update VBUSIN switch\n");
262                         return ret;
263                 }
264                 break;
265         default:
266                 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
267                 return -EINVAL;
268         };
269
270         return 0;
271 }
272
273 /* Return cable type of attached or detached accessories */
274 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
275 {
276         unsigned int cable_type = -1, adc, dev_type1;
277         int ret;
278
279         /* Read ADC value according to external cable or button */
280         ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
281         if (ret) {
282                 dev_err(info->dev, "failed to read ADC register\n");
283                 return ret;
284         }
285
286         /*
287          * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
288          * connected with to MUIC device.
289          */
290         cable_type = adc & SM5502_REG_ADC_MASK;
291         if (cable_type == SM5502_MUIC_ADC_GROUND)
292                 return SM5502_MUIC_ADC_GROUND;
293
294         switch (cable_type) {
295         case SM5502_MUIC_ADC_GROUND:
296         case SM5502_MUIC_ADC_SEND_END_BUTTON:
297         case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
298         case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
299         case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
300         case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
301         case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
302         case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
303         case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
304         case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
305         case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
306         case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
307         case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
308         case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
309         case SM5502_MUIC_ADC_RESERVED_ACC_1:
310         case SM5502_MUIC_ADC_RESERVED_ACC_2:
311         case SM5502_MUIC_ADC_RESERVED_ACC_3:
312         case SM5502_MUIC_ADC_RESERVED_ACC_4:
313         case SM5502_MUIC_ADC_RESERVED_ACC_5:
314         case SM5502_MUIC_ADC_AUDIO_TYPE2:
315         case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
316         case SM5502_MUIC_ADC_TTY_CONVERTER:
317         case SM5502_MUIC_ADC_UART_CABLE:
318         case SM5502_MUIC_ADC_TYPE1_CHARGER:
319         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
320         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
321         case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
322         case SM5502_MUIC_ADC_TYPE2_CHARGER:
323         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
324         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
325                 break;
326         case SM5502_MUIC_ADC_AUDIO_TYPE1:
327                 /*
328                  * Check whether cable type is
329                  * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
330                  * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
331                  * by using Button event.
332                  */
333                 break;
334         case SM5502_MUIC_ADC_OPEN:
335                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
336                                   &dev_type1);
337                 if (ret) {
338                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
339                         return ret;
340                 }
341
342                 switch (dev_type1) {
343                 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
344                         cable_type = SM5502_MUIC_ADC_OPEN_USB;
345                         break;
346                 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
347                         cable_type = SM5502_MUIC_ADC_OPEN_TA;
348                         break;
349                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
350                         cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
351                         break;
352                 default:
353                         dev_dbg(info->dev,
354                                 "cannot identify the cable type: adc(0x%x)\n",
355                                 adc);
356                         return -EINVAL;
357                 };
358                 break;
359         default:
360                 dev_err(info->dev,
361                         "failed to identify the cable type: adc(0x%x)\n", adc);
362                 return -EINVAL;
363         };
364
365         return cable_type;
366 }
367
368 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
369                                      bool attached)
370 {
371         static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
372         unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
373         unsigned int con_sw = DM_DP_SWITCH_OPEN;
374         unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
375         unsigned int id;
376         int ret;
377
378         /* Get the type of attached or detached cable */
379         if (attached)
380                 cable_type = sm5502_muic_get_cable_type(info);
381         else
382                 cable_type = prev_cable_type;
383         prev_cable_type = cable_type;
384
385         switch (cable_type) {
386         case SM5502_MUIC_ADC_OPEN_USB:
387                 id      = EXTCON_USB;
388                 con_sw  = DM_DP_SWITCH_USB;
389                 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
390                 break;
391         case SM5502_MUIC_ADC_OPEN_TA:
392                 id      = EXTCON_CHG_USB_DCP;
393                 con_sw  = DM_DP_SWITCH_OPEN;
394                 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
395                 break;
396         case SM5502_MUIC_ADC_OPEN_USB_OTG:
397                 id      = EXTCON_USB_HOST;
398                 con_sw  = DM_DP_SWITCH_USB;
399                 vbus_sw = VBUSIN_SWITCH_OPEN;
400                 break;
401         default:
402                 dev_dbg(info->dev,
403                         "cannot handle this cable_type (0x%x)\n", cable_type);
404                 return 0;
405         };
406
407         /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
408         ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
409         if (ret < 0)
410                 return ret;
411
412         /* Change the state of external accessory */
413         extcon_set_cable_state_(info->edev, id, attached);
414
415         return 0;
416 }
417
418 static void sm5502_muic_irq_work(struct work_struct *work)
419 {
420         struct sm5502_muic_info *info = container_of(work,
421                         struct sm5502_muic_info, irq_work);
422         int ret = 0;
423
424         if (!info->edev)
425                 return;
426
427         mutex_lock(&info->mutex);
428
429         /* Detect attached or detached cables */
430         if (info->irq_attach) {
431                 ret = sm5502_muic_cable_handler(info, true);
432                 info->irq_attach = false;
433         }
434         if (info->irq_detach) {
435                 ret = sm5502_muic_cable_handler(info, false);
436                 info->irq_detach = false;
437         }
438
439         if (ret < 0)
440                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
441
442         mutex_unlock(&info->mutex);
443 }
444
445 /*
446  * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
447  * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
448  */
449 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
450 {
451         switch (irq_type) {
452         case SM5502_IRQ_INT1_ATTACH:
453                 info->irq_attach = true;
454                 break;
455         case SM5502_IRQ_INT1_DETACH:
456                 info->irq_detach = true;
457                 break;
458         case SM5502_IRQ_INT1_KP:
459         case SM5502_IRQ_INT1_LKP:
460         case SM5502_IRQ_INT1_LKR:
461         case SM5502_IRQ_INT1_OVP_EVENT:
462         case SM5502_IRQ_INT1_OCP_EVENT:
463         case SM5502_IRQ_INT1_OVP_OCP_DIS:
464         case SM5502_IRQ_INT2_VBUS_DET:
465         case SM5502_IRQ_INT2_REV_ACCE:
466         case SM5502_IRQ_INT2_ADC_CHG:
467         case SM5502_IRQ_INT2_STUCK_KEY:
468         case SM5502_IRQ_INT2_STUCK_KEY_RCV:
469         case SM5502_IRQ_INT2_MHL:
470         default:
471                 break;
472         }
473
474         return 0;
475 }
476
477 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
478 {
479         struct sm5502_muic_info *info = data;
480         int i, irq_type = -1, ret;
481
482         for (i = 0; i < info->num_muic_irqs; i++)
483                 if (irq == info->muic_irqs[i].virq)
484                         irq_type = info->muic_irqs[i].irq;
485
486         ret = sm5502_parse_irq(info, irq_type);
487         if (ret < 0) {
488                 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
489                                     irq_type);
490                 return IRQ_HANDLED;
491         }
492         schedule_work(&info->irq_work);
493
494         return IRQ_HANDLED;
495 }
496
497 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
498 {
499         struct sm5502_muic_info *info = container_of(to_delayed_work(work),
500                                 struct sm5502_muic_info, wq_detcable);
501         int ret;
502
503         /* Notify the state of connector cable or not  */
504         ret = sm5502_muic_cable_handler(info, true);
505         if (ret < 0)
506                 dev_warn(info->dev, "failed to detect cable state\n");
507 }
508
509 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
510 {
511         unsigned int reg_data, vendor_id, version_id;
512         int i, ret;
513
514         /* To test I2C, Print version_id and vendor_id of SM5502 */
515         ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
516         if (ret) {
517                 dev_err(info->dev,
518                         "failed to read DEVICE_ID register: %d\n", ret);
519                 return;
520         }
521
522         vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
523                                 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
524         version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
525                                 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
526
527         dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
528                             version_id, vendor_id);
529
530         /* Initiazle the register of SM5502 device to bring-up */
531         for (i = 0; i < info->num_reg_data; i++) {
532                 unsigned int val = 0;
533
534                 if (!info->reg_data[i].invert)
535                         val |= ~info->reg_data[i].val;
536                 else
537                         val = info->reg_data[i].val;
538                 regmap_write(info->regmap, info->reg_data[i].reg, val);
539         }
540 }
541
542 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
543                                  const struct i2c_device_id *id)
544 {
545         struct device_node *np = i2c->dev.of_node;
546         struct sm5502_muic_info *info;
547         int i, ret, irq_flags;
548
549         if (!np)
550                 return -EINVAL;
551
552         info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
553         if (!info)
554                 return -ENOMEM;
555         i2c_set_clientdata(i2c, info);
556
557         info->dev = &i2c->dev;
558         info->i2c = i2c;
559         info->irq = i2c->irq;
560         info->muic_irqs = sm5502_muic_irqs;
561         info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
562         info->reg_data = sm5502_reg_data;
563         info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
564
565         mutex_init(&info->mutex);
566
567         INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
568
569         info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
570         if (IS_ERR(info->regmap)) {
571                 ret = PTR_ERR(info->regmap);
572                 dev_err(info->dev, "failed to allocate register map: %d\n",
573                                    ret);
574                 return ret;
575         }
576
577         /* Support irq domain for SM5502 MUIC device */
578         irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
579         ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
580                                   &sm5502_muic_irq_chip, &info->irq_data);
581         if (ret != 0) {
582                 dev_err(info->dev, "failed to request IRQ %d: %d\n",
583                                     info->irq, ret);
584                 return ret;
585         }
586
587         for (i = 0; i < info->num_muic_irqs; i++) {
588                 struct muic_irq *muic_irq = &info->muic_irqs[i];
589                 int virq = 0;
590
591                 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
592                 if (virq <= 0)
593                         return -EINVAL;
594                 muic_irq->virq = virq;
595
596                 ret = devm_request_threaded_irq(info->dev, virq, NULL,
597                                                 sm5502_muic_irq_handler,
598                                                 IRQF_NO_SUSPEND,
599                                                 muic_irq->name, info);
600                 if (ret) {
601                         dev_err(info->dev,
602                                 "failed: irq request (IRQ: %d, error :%d)\n",
603                                 muic_irq->irq, ret);
604                         return ret;
605                 }
606         }
607
608         /* Allocate extcon device */
609         info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
610         if (IS_ERR(info->edev)) {
611                 dev_err(info->dev, "failed to allocate memory for extcon\n");
612                 return -ENOMEM;
613         }
614
615         /* Register extcon device */
616         ret = devm_extcon_dev_register(info->dev, info->edev);
617         if (ret) {
618                 dev_err(info->dev, "failed to register extcon device\n");
619                 return ret;
620         }
621
622         /*
623          * Detect accessory after completing the initialization of platform
624          *
625          * - Use delayed workqueue to detect cable state and then
626          * notify cable state to notifiee/platform through uevent.
627          * After completing the booting of platform, the extcon provider
628          * driver should notify cable state to upper layer.
629          */
630         INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
631         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
632                         msecs_to_jiffies(DELAY_MS_DEFAULT));
633
634         /* Initialize SM5502 device and print vendor id and version id */
635         sm5502_init_dev_type(info);
636
637         return 0;
638 }
639
640 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
641 {
642         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
643
644         regmap_del_irq_chip(info->irq, info->irq_data);
645
646         return 0;
647 }
648
649 static const struct of_device_id sm5502_dt_match[] = {
650         { .compatible = "siliconmitus,sm5502-muic" },
651         { },
652 };
653 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
654
655 #ifdef CONFIG_PM_SLEEP
656 static int sm5502_muic_suspend(struct device *dev)
657 {
658         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
659         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
660
661         enable_irq_wake(info->irq);
662
663         return 0;
664 }
665
666 static int sm5502_muic_resume(struct device *dev)
667 {
668         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
669         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
670
671         disable_irq_wake(info->irq);
672
673         return 0;
674 }
675 #endif
676
677 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
678                          sm5502_muic_suspend, sm5502_muic_resume);
679
680 static const struct i2c_device_id sm5502_i2c_id[] = {
681         { "sm5502", TYPE_SM5502 },
682         { }
683 };
684 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
685
686 static struct i2c_driver sm5502_muic_i2c_driver = {
687         .driver         = {
688                 .name   = "sm5502",
689                 .pm     = &sm5502_muic_pm_ops,
690                 .of_match_table = sm5502_dt_match,
691         },
692         .probe  = sm5022_muic_i2c_probe,
693         .remove = sm5502_muic_i2c_remove,
694         .id_table = sm5502_i2c_id,
695 };
696
697 static int __init sm5502_muic_i2c_init(void)
698 {
699         return i2c_add_driver(&sm5502_muic_i2c_driver);
700 }
701 subsys_initcall(sm5502_muic_i2c_init);
702
703 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
704 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
705 MODULE_LICENSE("GPL");