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doc: Update rcu_assign_pointer() definition in whatisRCU.txt
[linux/fpc-iii.git] / drivers / extcon / extcon-sm5502.c
blob106ef0297b537b3a768eecef3f8f3af0829c7020
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 /*
139 * The below accessories have same ADC value (0x1f or 0x1e).
140 * So, Device type1 is used to separate specific accessory.
141 */
142 /* |---------|--ADC| */
143 /* | [7:5]|[4:0]| */
144 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
145 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
146 /* |Dev Type1|--ADC| */
147 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
148 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
149 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
150 };
151
152 /* List of supported interrupt for SM5502 */
153 static struct muic_irq sm5502_muic_irqs[] = {
154 { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
155 { SM5502_IRQ_INT1_DETACH, "muic-detach" },
156 { SM5502_IRQ_INT1_KP, "muic-kp" },
157 { SM5502_IRQ_INT1_LKP, "muic-lkp" },
158 { SM5502_IRQ_INT1_LKR, "muic-lkr" },
159 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
160 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
161 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
162 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
163 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
164 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
165 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
166 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
167 { SM5502_IRQ_INT2_MHL, "muic-mhl" },
168 };
169
170 /* Define interrupt list of SM5502 to register regmap_irq */
171 static const struct regmap_irq sm5502_irqs[] = {
172 /* INT1 interrupts */
173 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
174 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
175 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
176 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
177 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
178 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
179 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
180 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
181
182 /* INT2 interrupts */
183 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
184 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
185 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
186 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
187 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
188 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
189 };
190
191 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
192 .name = "sm5502",
193 .status_base = SM5502_REG_INT1,
194 .mask_base = SM5502_REG_INTMASK1,
195 .mask_invert = false,
196 .num_regs = 2,
197 .irqs = sm5502_irqs,
198 .num_irqs = ARRAY_SIZE(sm5502_irqs),
199 };
200
201 /* Define regmap configuration of SM5502 for I2C communication */
202 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
203 {
204 switch (reg) {
205 case SM5502_REG_INTMASK1:
206 case SM5502_REG_INTMASK2:
207 return true;
208 default:
209 break;
210 }
211 return false;
212 }
213
214 static const struct regmap_config sm5502_muic_regmap_config = {
215 .reg_bits = 8,
216 .val_bits = 8,
217 .volatile_reg = sm5502_muic_volatile_reg,
218 .max_register = SM5502_REG_END,
219 };
220
221 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
222 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
223 unsigned int con_sw, unsigned int vbus_sw,
224 bool attached)
225 {
226 int ret;
227
228 if (!attached) {
229 con_sw = DM_DP_SWITCH_OPEN;
230 vbus_sw = VBUSIN_SWITCH_OPEN;
231 }
232
233 switch (con_sw) {
234 case DM_DP_SWITCH_OPEN:
235 case DM_DP_SWITCH_USB:
236 case DM_DP_SWITCH_AUDIO:
237 case DM_DP_SWITCH_UART:
238 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
239 SM5502_REG_MANUAL_SW1_DP_MASK |
240 SM5502_REG_MANUAL_SW1_DM_MASK,
241 con_sw);
242 if (ret < 0) {
243 dev_err(info->dev,
244 "cannot update DM_CON/DP_CON switch\n");
245 return ret;
246 }
247 break;
248 default:
249 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
250 con_sw);
251 return -EINVAL;
252 };
253
254 switch (vbus_sw) {
255 case VBUSIN_SWITCH_OPEN:
256 case VBUSIN_SWITCH_VBUSOUT:
257 case VBUSIN_SWITCH_MIC:
258 case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
259 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
260 SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
261 vbus_sw);
262 if (ret < 0) {
263 dev_err(info->dev,
264 "cannot update VBUSIN switch\n");
265 return ret;
266 }
267 break;
268 default:
269 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
270 return -EINVAL;
271 };
272
273 return 0;
274 }
275
276 /* Return cable type of attached or detached accessories */
277 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
278 {
279 unsigned int cable_type = -1, adc, dev_type1;
280 int ret;
281
282 /* Read ADC value according to external cable or button */
283 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
284 if (ret) {
285 dev_err(info->dev, "failed to read ADC register\n");
286 return ret;
287 }
288
289 /*
290 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
291 * connected with to MUIC device.
292 */
293 cable_type = adc & SM5502_REG_ADC_MASK;
294 if (cable_type == SM5502_MUIC_ADC_GROUND)
295 return SM5502_MUIC_ADC_GROUND;
296
297 switch (cable_type) {
298 case SM5502_MUIC_ADC_GROUND:
299 case SM5502_MUIC_ADC_SEND_END_BUTTON:
300 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
301 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
302 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
303 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
304 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
305 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
306 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
307 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
308 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
309 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
310 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
311 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
312 case SM5502_MUIC_ADC_RESERVED_ACC_1:
313 case SM5502_MUIC_ADC_RESERVED_ACC_2:
314 case SM5502_MUIC_ADC_RESERVED_ACC_3:
315 case SM5502_MUIC_ADC_RESERVED_ACC_4:
316 case SM5502_MUIC_ADC_RESERVED_ACC_5:
317 case SM5502_MUIC_ADC_AUDIO_TYPE2:
318 case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
319 case SM5502_MUIC_ADC_TTY_CONVERTER:
320 case SM5502_MUIC_ADC_UART_CABLE:
321 case SM5502_MUIC_ADC_TYPE1_CHARGER:
322 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
323 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
324 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
325 case SM5502_MUIC_ADC_TYPE2_CHARGER:
326 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
327 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
328 break;
329 case SM5502_MUIC_ADC_AUDIO_TYPE1:
330 /*
331 * Check whether cable type is
332 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
333 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
334 * by using Button event.
335 */
336 break;
337 case SM5502_MUIC_ADC_OPEN:
338 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
339 &dev_type1);
340 if (ret) {
341 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
342 return ret;
343 }
344
345 switch (dev_type1) {
346 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
347 cable_type = SM5502_MUIC_ADC_OPEN_USB;
348 break;
349 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
350 cable_type = SM5502_MUIC_ADC_OPEN_TA;
351 break;
352 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
353 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
354 break;
355 default:
356 dev_dbg(info->dev,
357 "cannot identify the cable type: adc(0x%x)\n",
358 adc);
359 return -EINVAL;
360 };
361 break;
362 default:
363 dev_err(info->dev,
364 "failed to identify the cable type: adc(0x%x)\n", adc);
365 return -EINVAL;
366 };
367
368 return cable_type;
369 }
370
371 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
372 bool attached)
373 {
374 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
375 unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
376 unsigned int con_sw = DM_DP_SWITCH_OPEN;
377 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
378 unsigned int id;
379 int ret;
380
381 /* Get the type of attached or detached cable */
382 if (attached)
383 cable_type = sm5502_muic_get_cable_type(info);
384 else
385 cable_type = prev_cable_type;
386 prev_cable_type = cable_type;
387
388 switch (cable_type) {
389 case SM5502_MUIC_ADC_OPEN_USB:
390 id = EXTCON_USB;
391 con_sw = DM_DP_SWITCH_USB;
392 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
393 break;
394 case SM5502_MUIC_ADC_OPEN_TA:
395 id = EXTCON_CHG_USB_DCP;
396 con_sw = DM_DP_SWITCH_OPEN;
397 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
398 break;
399 case SM5502_MUIC_ADC_OPEN_USB_OTG:
400 id = EXTCON_USB_HOST;
401 con_sw = DM_DP_SWITCH_USB;
402 vbus_sw = VBUSIN_SWITCH_OPEN;
403 break;
404 default:
405 dev_dbg(info->dev,
406 "cannot handle this cable_type (0x%x)\n", cable_type);
407 return 0;
408 };
409
410 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
411 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
412 if (ret < 0)
413 return ret;
414
415 /* Change the state of external accessory */
416 extcon_set_state_sync(info->edev, id, attached);
417 if (id == EXTCON_USB)
418 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
419 attached);
420
421 return 0;
422 }
423
424 static void sm5502_muic_irq_work(struct work_struct *work)
425 {
426 struct sm5502_muic_info *info = container_of(work,
427 struct sm5502_muic_info, irq_work);
428 int ret = 0;
429
430 if (!info->edev)
431 return;
432
433 mutex_lock(&info->mutex);
434
435 /* Detect attached or detached cables */
436 if (info->irq_attach) {
437 ret = sm5502_muic_cable_handler(info, true);
438 info->irq_attach = false;
439 }
440 if (info->irq_detach) {
441 ret = sm5502_muic_cable_handler(info, false);
442 info->irq_detach = false;
443 }
444
445 if (ret < 0)
446 dev_err(info->dev, "failed to handle MUIC interrupt\n");
447
448 mutex_unlock(&info->mutex);
449 }
450
451 /*
452 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
453 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
454 */
455 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
456 {
457 switch (irq_type) {
458 case SM5502_IRQ_INT1_ATTACH:
459 info->irq_attach = true;
460 break;
461 case SM5502_IRQ_INT1_DETACH:
462 info->irq_detach = true;
463 break;
464 case SM5502_IRQ_INT1_KP:
465 case SM5502_IRQ_INT1_LKP:
466 case SM5502_IRQ_INT1_LKR:
467 case SM5502_IRQ_INT1_OVP_EVENT:
468 case SM5502_IRQ_INT1_OCP_EVENT:
469 case SM5502_IRQ_INT1_OVP_OCP_DIS:
470 case SM5502_IRQ_INT2_VBUS_DET:
471 case SM5502_IRQ_INT2_REV_ACCE:
472 case SM5502_IRQ_INT2_ADC_CHG:
473 case SM5502_IRQ_INT2_STUCK_KEY:
474 case SM5502_IRQ_INT2_STUCK_KEY_RCV:
475 case SM5502_IRQ_INT2_MHL:
476 default:
477 break;
478 }
479
480 return 0;
481 }
482
483 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
484 {
485 struct sm5502_muic_info *info = data;
486 int i, irq_type = -1, ret;
487
488 for (i = 0; i < info->num_muic_irqs; i++)
489 if (irq == info->muic_irqs[i].virq)
490 irq_type = info->muic_irqs[i].irq;
491
492 ret = sm5502_parse_irq(info, irq_type);
493 if (ret < 0) {
494 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
495 irq_type);
496 return IRQ_HANDLED;
497 }
498 schedule_work(&info->irq_work);
499
500 return IRQ_HANDLED;
501 }
502
503 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
504 {
505 struct sm5502_muic_info *info = container_of(to_delayed_work(work),
506 struct sm5502_muic_info, wq_detcable);
507 int ret;
508
509 /* Notify the state of connector cable or not */
510 ret = sm5502_muic_cable_handler(info, true);
511 if (ret < 0)
512 dev_warn(info->dev, "failed to detect cable state\n");
513 }
514
515 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
516 {
517 unsigned int reg_data, vendor_id, version_id;
518 int i, ret;
519
520 /* To test I2C, Print version_id and vendor_id of SM5502 */
521 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
522 if (ret) {
523 dev_err(info->dev,
524 "failed to read DEVICE_ID register: %d\n", ret);
525 return;
526 }
527
528 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
529 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
530 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
531 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
532
533 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
534 version_id, vendor_id);
535
536 /* Initiazle the register of SM5502 device to bring-up */
537 for (i = 0; i < info->num_reg_data; i++) {
538 unsigned int val = 0;
539
540 if (!info->reg_data[i].invert)
541 val |= ~info->reg_data[i].val;
542 else
543 val = info->reg_data[i].val;
544 regmap_write(info->regmap, info->reg_data[i].reg, val);
545 }
546 }
547
548 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
549 const struct i2c_device_id *id)
550 {
551 struct device_node *np = i2c->dev.of_node;
552 struct sm5502_muic_info *info;
553 int i, ret, irq_flags;
554
555 if (!np)
556 return -EINVAL;
557
558 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
559 if (!info)
560 return -ENOMEM;
561 i2c_set_clientdata(i2c, info);
562
563 info->dev = &i2c->dev;
564 info->i2c = i2c;
565 info->irq = i2c->irq;
566 info->muic_irqs = sm5502_muic_irqs;
567 info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
568 info->reg_data = sm5502_reg_data;
569 info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
570
571 mutex_init(&info->mutex);
572
573 INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
574
575 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
576 if (IS_ERR(info->regmap)) {
577 ret = PTR_ERR(info->regmap);
578 dev_err(info->dev, "failed to allocate register map: %d\n",
579 ret);
580 return ret;
581 }
582
583 /* Support irq domain for SM5502 MUIC device */
584 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
585 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
586 &sm5502_muic_irq_chip, &info->irq_data);
587 if (ret != 0) {
588 dev_err(info->dev, "failed to request IRQ %d: %d\n",
589 info->irq, ret);
590 return ret;
591 }
592
593 for (i = 0; i < info->num_muic_irqs; i++) {
594 struct muic_irq *muic_irq = &info->muic_irqs[i];
595 int virq = 0;
596
597 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
598 if (virq <= 0)
599 return -EINVAL;
600 muic_irq->virq = virq;
601
602 ret = devm_request_threaded_irq(info->dev, virq, NULL,
603 sm5502_muic_irq_handler,
604 IRQF_NO_SUSPEND,
605 muic_irq->name, info);
606 if (ret) {
607 dev_err(info->dev,
608 "failed: irq request (IRQ: %d, error :%d)\n",
609 muic_irq->irq, ret);
610 return ret;
611 }
612 }
613
614 /* Allocate extcon device */
615 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
616 if (IS_ERR(info->edev)) {
617 dev_err(info->dev, "failed to allocate memory for extcon\n");
618 return -ENOMEM;
619 }
620
621 /* Register extcon device */
622 ret = devm_extcon_dev_register(info->dev, info->edev);
623 if (ret) {
624 dev_err(info->dev, "failed to register extcon device\n");
625 return ret;
626 }
627
628 /*
629 * Detect accessory after completing the initialization of platform
630 *
631 * - Use delayed workqueue to detect cable state and then
632 * notify cable state to notifiee/platform through uevent.
633 * After completing the booting of platform, the extcon provider
634 * driver should notify cable state to upper layer.
635 */
636 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
637 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
638 msecs_to_jiffies(DELAY_MS_DEFAULT));
639
640 /* Initialize SM5502 device and print vendor id and version id */
641 sm5502_init_dev_type(info);
642
643 return 0;
644 }
645
646 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
647 {
648 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
649
650 regmap_del_irq_chip(info->irq, info->irq_data);
651
652 return 0;
653 }
654
655 static const struct of_device_id sm5502_dt_match[] = {
656 { .compatible = "siliconmitus,sm5502-muic" },
657 { },
658 };
659 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
660
661 #ifdef CONFIG_PM_SLEEP
662 static int sm5502_muic_suspend(struct device *dev)
663 {
664 struct i2c_client *i2c = to_i2c_client(dev);
665 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
666
667 enable_irq_wake(info->irq);
668
669 return 0;
670 }
671
672 static int sm5502_muic_resume(struct device *dev)
673 {
674 struct i2c_client *i2c = to_i2c_client(dev);
675 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
676
677 disable_irq_wake(info->irq);
678
679 return 0;
680 }
681 #endif
682
683 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
684 sm5502_muic_suspend, sm5502_muic_resume);
685
686 static const struct i2c_device_id sm5502_i2c_id[] = {
687 { "sm5502", TYPE_SM5502 },
688 { }
689 };
690 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
691
692 static struct i2c_driver sm5502_muic_i2c_driver = {
693 .driver = {
694 .name = "sm5502",
695 .pm = &sm5502_muic_pm_ops,
696 .of_match_table = sm5502_dt_match,
697 },
698 .probe = sm5022_muic_i2c_probe,
699 .remove = sm5502_muic_i2c_remove,
700 .id_table = sm5502_i2c_id,
701 };
702
703 static int __init sm5502_muic_i2c_init(void)
704 {
705 return i2c_add_driver(&sm5502_muic_i2c_driver);
706 }
707 subsys_initcall(sm5502_muic_i2c_init);
708
709 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
710 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
711 MODULE_LICENSE("GPL");
Linux with added FPC-III support