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arm64: spinlock: serialise spin_unlock_wait against concurrent lockers
[linux/fpc-iii.git] / drivers / extcon / extcon-sm5502.c
blob7aac3cc7efd79ff121850252c9f24ec434ee37d3
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");
Linux with added FPC-III support