?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
tcp: fix lockdep splat in tcp_snd_una_update()
[linux/fpc-iii.git] / drivers / extcon / extcon-sm5502.c
blobdf769a17e736fcadae1fbf05543fd6837ebd0f13
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_SDP,
99 EXTCON_CHG_USB_DCP,
100 EXTCON_NONE,
101 };
102
103 /* Define supported accessory type */
104 enum sm5502_muic_acc_type {
105 SM5502_MUIC_ADC_GROUND = 0x0,
106 SM5502_MUIC_ADC_SEND_END_BUTTON,
107 SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
108 SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
109 SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
110 SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
111 SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
112 SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
113 SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
114 SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
115 SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
116 SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
117 SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
118 SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
119 SM5502_MUIC_ADC_RESERVED_ACC_1,
120 SM5502_MUIC_ADC_RESERVED_ACC_2,
121 SM5502_MUIC_ADC_RESERVED_ACC_3,
122 SM5502_MUIC_ADC_RESERVED_ACC_4,
123 SM5502_MUIC_ADC_RESERVED_ACC_5,
124 SM5502_MUIC_ADC_AUDIO_TYPE2,
125 SM5502_MUIC_ADC_PHONE_POWERED_DEV,
126 SM5502_MUIC_ADC_TTY_CONVERTER,
127 SM5502_MUIC_ADC_UART_CABLE,
128 SM5502_MUIC_ADC_TYPE1_CHARGER,
129 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
130 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
131 SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
132 SM5502_MUIC_ADC_TYPE2_CHARGER,
133 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
134 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
135 SM5502_MUIC_ADC_AUDIO_TYPE1,
136 SM5502_MUIC_ADC_OPEN = 0x1f,
137
138 /* The below accessories have same ADC value (0x1f or 0x1e).
139 So, Device type1 is used to separate specific accessory. */
140 /* |---------|--ADC| */
141 /* | [7:5]|[4:0]| */
142 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
143 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
144 /* |Dev Type1|--ADC| */
145 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
146 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
147 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
148 };
149
150 /* List of supported interrupt for SM5502 */
151 static struct muic_irq sm5502_muic_irqs[] = {
152 { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
153 { SM5502_IRQ_INT1_DETACH, "muic-detach" },
154 { SM5502_IRQ_INT1_KP, "muic-kp" },
155 { SM5502_IRQ_INT1_LKP, "muic-lkp" },
156 { SM5502_IRQ_INT1_LKR, "muic-lkr" },
157 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
158 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
159 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
160 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
161 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
162 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
163 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
164 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
165 { SM5502_IRQ_INT2_MHL, "muic-mhl" },
166 };
167
168 /* Define interrupt list of SM5502 to register regmap_irq */
169 static const struct regmap_irq sm5502_irqs[] = {
170 /* INT1 interrupts */
171 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
172 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
173 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
174 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
175 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
176 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
177 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
178 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
179
180 /* INT2 interrupts */
181 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
182 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
183 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
184 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
185 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
186 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
187 };
188
189 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
190 .name = "sm5502",
191 .status_base = SM5502_REG_INT1,
192 .mask_base = SM5502_REG_INTMASK1,
193 .mask_invert = false,
194 .num_regs = 2,
195 .irqs = sm5502_irqs,
196 .num_irqs = ARRAY_SIZE(sm5502_irqs),
197 };
198
199 /* Define regmap configuration of SM5502 for I2C communication */
200 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
201 {
202 switch (reg) {
203 case SM5502_REG_INTMASK1:
204 case SM5502_REG_INTMASK2:
205 return true;
206 default:
207 break;
208 }
209 return false;
210 }
211
212 static const struct regmap_config sm5502_muic_regmap_config = {
213 .reg_bits = 8,
214 .val_bits = 8,
215 .volatile_reg = sm5502_muic_volatile_reg,
216 .max_register = SM5502_REG_END,
217 };
218
219 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
220 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
221 unsigned int con_sw, unsigned int vbus_sw,
222 bool attached)
223 {
224 int ret;
225
226 if (!attached) {
227 con_sw = DM_DP_SWITCH_OPEN;
228 vbus_sw = VBUSIN_SWITCH_OPEN;
229 }
230
231 switch (con_sw) {
232 case DM_DP_SWITCH_OPEN:
233 case DM_DP_SWITCH_USB:
234 case DM_DP_SWITCH_AUDIO:
235 case DM_DP_SWITCH_UART:
236 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
237 SM5502_REG_MANUAL_SW1_DP_MASK |
238 SM5502_REG_MANUAL_SW1_DM_MASK,
239 con_sw);
240 if (ret < 0) {
241 dev_err(info->dev,
242 "cannot update DM_CON/DP_CON switch\n");
243 return ret;
244 }
245 break;
246 default:
247 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
248 con_sw);
249 return -EINVAL;
250 };
251
252 switch (vbus_sw) {
253 case VBUSIN_SWITCH_OPEN:
254 case VBUSIN_SWITCH_VBUSOUT:
255 case VBUSIN_SWITCH_MIC:
256 case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
257 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
258 SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
259 vbus_sw);
260 if (ret < 0) {
261 dev_err(info->dev,
262 "cannot update VBUSIN switch\n");
263 return ret;
264 }
265 break;
266 default:
267 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
268 return -EINVAL;
269 };
270
271 return 0;
272 }
273
274 /* Return cable type of attached or detached accessories */
275 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
276 {
277 unsigned int cable_type = -1, adc, dev_type1;
278 int ret;
279
280 /* Read ADC value according to external cable or button */
281 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
282 if (ret) {
283 dev_err(info->dev, "failed to read ADC register\n");
284 return ret;
285 }
286
287 /*
288 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
289 * connected with to MUIC device.
290 */
291 cable_type = adc & SM5502_REG_ADC_MASK;
292 if (cable_type == SM5502_MUIC_ADC_GROUND)
293 return SM5502_MUIC_ADC_GROUND;
294
295 switch (cable_type) {
296 case SM5502_MUIC_ADC_GROUND:
297 case SM5502_MUIC_ADC_SEND_END_BUTTON:
298 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
299 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
300 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
301 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
302 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
303 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
304 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
305 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
306 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
307 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
308 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
309 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
310 case SM5502_MUIC_ADC_RESERVED_ACC_1:
311 case SM5502_MUIC_ADC_RESERVED_ACC_2:
312 case SM5502_MUIC_ADC_RESERVED_ACC_3:
313 case SM5502_MUIC_ADC_RESERVED_ACC_4:
314 case SM5502_MUIC_ADC_RESERVED_ACC_5:
315 case SM5502_MUIC_ADC_AUDIO_TYPE2:
316 case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
317 case SM5502_MUIC_ADC_TTY_CONVERTER:
318 case SM5502_MUIC_ADC_UART_CABLE:
319 case SM5502_MUIC_ADC_TYPE1_CHARGER:
320 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
321 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
322 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
323 case SM5502_MUIC_ADC_TYPE2_CHARGER:
324 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
325 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
326 break;
327 case SM5502_MUIC_ADC_AUDIO_TYPE1:
328 /*
329 * Check whether cable type is
330 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
331 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
332 * by using Button event.
333 */
334 break;
335 case SM5502_MUIC_ADC_OPEN:
336 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
337 &dev_type1);
338 if (ret) {
339 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
340 return ret;
341 }
342
343 switch (dev_type1) {
344 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
345 cable_type = SM5502_MUIC_ADC_OPEN_USB;
346 break;
347 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
348 cable_type = SM5502_MUIC_ADC_OPEN_TA;
349 break;
350 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
351 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
352 break;
353 default:
354 dev_dbg(info->dev,
355 "cannot identify the cable type: adc(0x%x)\n",
356 adc);
357 return -EINVAL;
358 };
359 break;
360 default:
361 dev_err(info->dev,
362 "failed to identify the cable type: adc(0x%x)\n", adc);
363 return -EINVAL;
364 };
365
366 return cable_type;
367 }
368
369 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
370 bool attached)
371 {
372 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
373 unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
374 unsigned int con_sw = DM_DP_SWITCH_OPEN;
375 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
376 unsigned int id;
377 int ret;
378
379 /* Get the type of attached or detached cable */
380 if (attached)
381 cable_type = sm5502_muic_get_cable_type(info);
382 else
383 cable_type = prev_cable_type;
384 prev_cable_type = cable_type;
385
386 switch (cable_type) {
387 case SM5502_MUIC_ADC_OPEN_USB:
388 id = EXTCON_USB;
389 con_sw = DM_DP_SWITCH_USB;
390 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
391 break;
392 case SM5502_MUIC_ADC_OPEN_TA:
393 id = EXTCON_CHG_USB_DCP;
394 con_sw = DM_DP_SWITCH_OPEN;
395 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
396 break;
397 case SM5502_MUIC_ADC_OPEN_USB_OTG:
398 id = EXTCON_USB_HOST;
399 con_sw = DM_DP_SWITCH_USB;
400 vbus_sw = VBUSIN_SWITCH_OPEN;
401 break;
402 default:
403 dev_dbg(info->dev,
404 "cannot handle this cable_type (0x%x)\n", cable_type);
405 return 0;
406 };
407
408 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
409 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
410 if (ret < 0)
411 return ret;
412
413 /* Change the state of external accessory */
414 extcon_set_cable_state_(info->edev, id, attached);
415 if (id == EXTCON_USB)
416 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SDP,
417 attached);
418
419 return 0;
420 }
421
422 static void sm5502_muic_irq_work(struct work_struct *work)
423 {
424 struct sm5502_muic_info *info = container_of(work,
425 struct sm5502_muic_info, irq_work);
426 int ret = 0;
427
428 if (!info->edev)
429 return;
430
431 mutex_lock(&info->mutex);
432
433 /* Detect attached or detached cables */
434 if (info->irq_attach) {
435 ret = sm5502_muic_cable_handler(info, true);
436 info->irq_attach = false;
437 }
438 if (info->irq_detach) {
439 ret = sm5502_muic_cable_handler(info, false);
440 info->irq_detach = false;
441 }
442
443 if (ret < 0)
444 dev_err(info->dev, "failed to handle MUIC interrupt\n");
445
446 mutex_unlock(&info->mutex);
447 }
448
449 /*
450 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
451 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
452 */
453 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
454 {
455 switch (irq_type) {
456 case SM5502_IRQ_INT1_ATTACH:
457 info->irq_attach = true;
458 break;
459 case SM5502_IRQ_INT1_DETACH:
460 info->irq_detach = true;
461 break;
462 case SM5502_IRQ_INT1_KP:
463 case SM5502_IRQ_INT1_LKP:
464 case SM5502_IRQ_INT1_LKR:
465 case SM5502_IRQ_INT1_OVP_EVENT:
466 case SM5502_IRQ_INT1_OCP_EVENT:
467 case SM5502_IRQ_INT1_OVP_OCP_DIS:
468 case SM5502_IRQ_INT2_VBUS_DET:
469 case SM5502_IRQ_INT2_REV_ACCE:
470 case SM5502_IRQ_INT2_ADC_CHG:
471 case SM5502_IRQ_INT2_STUCK_KEY:
472 case SM5502_IRQ_INT2_STUCK_KEY_RCV:
473 case SM5502_IRQ_INT2_MHL:
474 default:
475 break;
476 }
477
478 return 0;
479 }
480
481 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
482 {
483 struct sm5502_muic_info *info = data;
484 int i, irq_type = -1, ret;
485
486 for (i = 0; i < info->num_muic_irqs; i++)
487 if (irq == info->muic_irqs[i].virq)
488 irq_type = info->muic_irqs[i].irq;
489
490 ret = sm5502_parse_irq(info, irq_type);
491 if (ret < 0) {
492 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
493 irq_type);
494 return IRQ_HANDLED;
495 }
496 schedule_work(&info->irq_work);
497
498 return IRQ_HANDLED;
499 }
500
501 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
502 {
503 struct sm5502_muic_info *info = container_of(to_delayed_work(work),
504 struct sm5502_muic_info, wq_detcable);
505 int ret;
506
507 /* Notify the state of connector cable or not */
508 ret = sm5502_muic_cable_handler(info, true);
509 if (ret < 0)
510 dev_warn(info->dev, "failed to detect cable state\n");
511 }
512
513 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
514 {
515 unsigned int reg_data, vendor_id, version_id;
516 int i, ret;
517
518 /* To test I2C, Print version_id and vendor_id of SM5502 */
519 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
520 if (ret) {
521 dev_err(info->dev,
522 "failed to read DEVICE_ID register: %d\n", ret);
523 return;
524 }
525
526 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
527 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
528 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
529 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
530
531 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
532 version_id, vendor_id);
533
534 /* Initiazle the register of SM5502 device to bring-up */
535 for (i = 0; i < info->num_reg_data; i++) {
536 unsigned int val = 0;
537
538 if (!info->reg_data[i].invert)
539 val |= ~info->reg_data[i].val;
540 else
541 val = info->reg_data[i].val;
542 regmap_write(info->regmap, info->reg_data[i].reg, val);
543 }
544 }
545
546 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
547 const struct i2c_device_id *id)
548 {
549 struct device_node *np = i2c->dev.of_node;
550 struct sm5502_muic_info *info;
551 int i, ret, irq_flags;
552
553 if (!np)
554 return -EINVAL;
555
556 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
557 if (!info)
558 return -ENOMEM;
559 i2c_set_clientdata(i2c, info);
560
561 info->dev = &i2c->dev;
562 info->i2c = i2c;
563 info->irq = i2c->irq;
564 info->muic_irqs = sm5502_muic_irqs;
565 info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
566 info->reg_data = sm5502_reg_data;
567 info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
568
569 mutex_init(&info->mutex);
570
571 INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
572
573 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
574 if (IS_ERR(info->regmap)) {
575 ret = PTR_ERR(info->regmap);
576 dev_err(info->dev, "failed to allocate register map: %d\n",
577 ret);
578 return ret;
579 }
580
581 /* Support irq domain for SM5502 MUIC device */
582 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
583 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
584 &sm5502_muic_irq_chip, &info->irq_data);
585 if (ret != 0) {
586 dev_err(info->dev, "failed to request IRQ %d: %d\n",
587 info->irq, ret);
588 return ret;
589 }
590
591 for (i = 0; i < info->num_muic_irqs; i++) {
592 struct muic_irq *muic_irq = &info->muic_irqs[i];
593 int virq = 0;
594
595 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
596 if (virq <= 0)
597 return -EINVAL;
598 muic_irq->virq = virq;
599
600 ret = devm_request_threaded_irq(info->dev, virq, NULL,
601 sm5502_muic_irq_handler,
602 IRQF_NO_SUSPEND,
603 muic_irq->name, info);
604 if (ret) {
605 dev_err(info->dev,
606 "failed: irq request (IRQ: %d, error :%d)\n",
607 muic_irq->irq, ret);
608 return ret;
609 }
610 }
611
612 /* Allocate extcon device */
613 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
614 if (IS_ERR(info->edev)) {
615 dev_err(info->dev, "failed to allocate memory for extcon\n");
616 return -ENOMEM;
617 }
618
619 /* Register extcon device */
620 ret = devm_extcon_dev_register(info->dev, info->edev);
621 if (ret) {
622 dev_err(info->dev, "failed to register extcon device\n");
623 return ret;
624 }
625
626 /*
627 * Detect accessory after completing the initialization of platform
628 *
629 * - Use delayed workqueue to detect cable state and then
630 * notify cable state to notifiee/platform through uevent.
631 * After completing the booting of platform, the extcon provider
632 * driver should notify cable state to upper layer.
633 */
634 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
635 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
636 msecs_to_jiffies(DELAY_MS_DEFAULT));
637
638 /* Initialize SM5502 device and print vendor id and version id */
639 sm5502_init_dev_type(info);
640
641 return 0;
642 }
643
644 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
645 {
646 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
647
648 regmap_del_irq_chip(info->irq, info->irq_data);
649
650 return 0;
651 }
652
653 static const struct of_device_id sm5502_dt_match[] = {
654 { .compatible = "siliconmitus,sm5502-muic" },
655 { },
656 };
657 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
658
659 #ifdef CONFIG_PM_SLEEP
660 static int sm5502_muic_suspend(struct device *dev)
661 {
662 struct i2c_client *i2c = to_i2c_client(dev);
663 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
664
665 enable_irq_wake(info->irq);
666
667 return 0;
668 }
669
670 static int sm5502_muic_resume(struct device *dev)
671 {
672 struct i2c_client *i2c = to_i2c_client(dev);
673 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
674
675 disable_irq_wake(info->irq);
676
677 return 0;
678 }
679 #endif
680
681 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
682 sm5502_muic_suspend, sm5502_muic_resume);
683
684 static const struct i2c_device_id sm5502_i2c_id[] = {
685 { "sm5502", TYPE_SM5502 },
686 { }
687 };
688 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
689
690 static struct i2c_driver sm5502_muic_i2c_driver = {
691 .driver = {
692 .name = "sm5502",
693 .pm = &sm5502_muic_pm_ops,
694 .of_match_table = sm5502_dt_match,
695 },
696 .probe = sm5022_muic_i2c_probe,
697 .remove = sm5502_muic_i2c_remove,
698 .id_table = sm5502_i2c_id,
699 };
700
701 static int __init sm5502_muic_i2c_init(void)
702 {
703 return i2c_add_driver(&sm5502_muic_i2c_driver);
704 }
705 subsys_initcall(sm5502_muic_i2c_init);
706
707 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
708 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
709 MODULE_LICENSE("GPL");
Linux with added FPC-III support