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1/*
2 * extcon-rt8973a.c - Richtek RT8973A extcon driver 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/input.h>
16#include <linux/interrupt.h>
17#include <linux/irqdomain.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/regmap.h>
22#include <linux/slab.h>
23#include <linux/extcon.h>
24
25#include "extcon-rt8973a.h"
26
27#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
28
29struct muic_irq {
30 unsigned int irq;
31 const char *name;
32 unsigned int virq;
33};
34
35struct reg_data {
36 u8 reg;
37 u8 mask;
38 u8 val;
39 bool invert;
40};
41
42struct rt8973a_muic_info {
43 struct device *dev;
44 struct extcon_dev *edev;
45
46 struct i2c_client *i2c;
47 struct regmap *regmap;
48
49 struct regmap_irq_chip_data *irq_data;
50 struct muic_irq *muic_irqs;
51 unsigned int num_muic_irqs;
52 int irq;
53 bool irq_attach;
54 bool irq_detach;
55 bool irq_ovp;
56 bool irq_otp;
57 struct work_struct irq_work;
58
59 struct reg_data *reg_data;
60 unsigned int num_reg_data;
61 bool auto_config;
62
63 struct mutex mutex;
64
65 /*
66 * Use delayed workqueue to detect cable state and then
67 * notify cable state to notifiee/platform through uevent.
68 * After completing the booting of platform, the extcon provider
69 * driver should notify cable state to upper layer.
70 */
71 struct delayed_work wq_detcable;
72};
73
74/* Default value of RT8973A register to bring up MUIC device. */
75static struct reg_data rt8973a_reg_data[] = {
76 {
77 .reg = RT8973A_REG_CONTROL1,
78 .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK
79 | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
80 | RT8973A_REG_CONTROL1_CHGTYP_MASK
81 | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK
82 | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK
83 | RT8973A_REG_CONTROL1_INTM_MASK,
84 .val = RT8973A_REG_CONTROL1_ADC_EN_MASK
85 | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
86 | RT8973A_REG_CONTROL1_CHGTYP_MASK,
87 .invert = false,
88 },
89 { /* sentinel */ }
90};
91
92/* List of detectable cables */
93static const unsigned int rt8973a_extcon_cable[] = {
94 EXTCON_USB,
95 EXTCON_USB_HOST,
96 EXTCON_CHG_USB_SDP,
97 EXTCON_CHG_USB_DCP,
98 EXTCON_JIG,
99 EXTCON_NONE,
100};
101
102/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */
103enum rt8973a_event_type {
104 RT8973A_EVENT_ATTACH = 1,
105 RT8973A_EVENT_DETACH,
106 RT8973A_EVENT_OVP,
107 RT8973A_EVENT_OTP,
108};
109
110/* Define supported accessory type */
111enum rt8973a_muic_acc_type {
112 RT8973A_MUIC_ADC_OTG = 0x0,
113 RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON,
114 RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON,
115 RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON,
116 RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON,
117 RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON,
118 RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON,
119 RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON,
120 RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON,
121 RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON,
122 RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON,
123 RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON,
124 RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON,
125 RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON,
126 RT8973A_MUIC_ADC_RESERVED_ACC_1,
127 RT8973A_MUIC_ADC_RESERVED_ACC_2,
128 RT8973A_MUIC_ADC_RESERVED_ACC_3,
129 RT8973A_MUIC_ADC_RESERVED_ACC_4,
130 RT8973A_MUIC_ADC_RESERVED_ACC_5,
131 RT8973A_MUIC_ADC_AUDIO_TYPE2,
132 RT8973A_MUIC_ADC_PHONE_POWERED_DEV,
133 RT8973A_MUIC_ADC_UNKNOWN_ACC_1,
134 RT8973A_MUIC_ADC_UNKNOWN_ACC_2,
135 RT8973A_MUIC_ADC_TA,
136 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
137 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
138 RT8973A_MUIC_ADC_UNKNOWN_ACC_3,
139 RT8973A_MUIC_ADC_UNKNOWN_ACC_4,
140 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
141 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
142 RT8973A_MUIC_ADC_UNKNOWN_ACC_5,
143 RT8973A_MUIC_ADC_OPEN = 0x1f,
144
145 /* The below accessories has same ADC value (0x1f).
146 So, Device type1 is used to separate specific accessory. */
147 /* |---------|--ADC| */
148 /* | [7:5]|[4:0]| */
149 RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */
150};
151
152/* List of supported interrupt for RT8973A */
153static struct muic_irq rt8973a_muic_irqs[] = {
154 { RT8973A_INT1_ATTACH, "muic-attach" },
155 { RT8973A_INT1_DETACH, "muic-detach" },
156 { RT8973A_INT1_CHGDET, "muic-chgdet" },
157 { RT8973A_INT1_DCD_T, "muic-dcd-t" },
158 { RT8973A_INT1_OVP, "muic-ovp" },
159 { RT8973A_INT1_CONNECT, "muic-connect" },
160 { RT8973A_INT1_ADC_CHG, "muic-adc-chg" },
161 { RT8973A_INT1_OTP, "muic-otp" },
162 { RT8973A_INT2_UVLO, "muic-uvlo" },
163 { RT8973A_INT2_POR, "muic-por" },
164 { RT8973A_INT2_OTP_FET, "muic-otp-fet" },
165 { RT8973A_INT2_OVP_FET, "muic-ovp-fet" },
166 { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" },
167 { RT8973A_INT2_OCP, "muic-ocp" },
168 { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" },
169};
170
171/* Define interrupt list of RT8973A to register regmap_irq */
172static const struct regmap_irq rt8973a_irqs[] = {
173 /* INT1 interrupts */
174 { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, },
175 { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, },
176 { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, },
177 { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, },
178 { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, },
179 { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, },
180 { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, },
181 { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, },
182
183 /* INT2 interrupts */
184 { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,},
185 { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, },
186 { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, },
187 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, },
188 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, },
189 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, },
190 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, },
191};
192
193static const struct regmap_irq_chip rt8973a_muic_irq_chip = {
194 .name = "rt8973a",
195 .status_base = RT8973A_REG_INT1,
196 .mask_base = RT8973A_REG_INTM1,
197 .mask_invert = false,
198 .num_regs = 2,
199 .irqs = rt8973a_irqs,
200 .num_irqs = ARRAY_SIZE(rt8973a_irqs),
201};
202
203/* Define regmap configuration of RT8973A for I2C communication */
204static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg)
205{
206 switch (reg) {
207 case RT8973A_REG_INTM1:
208 case RT8973A_REG_INTM2:
209 return true;
210 default:
211 break;
212 }
213 return false;
214}
215
216static const struct regmap_config rt8973a_muic_regmap_config = {
217 .reg_bits = 8,
218 .val_bits = 8,
219 .volatile_reg = rt8973a_muic_volatile_reg,
220 .max_register = RT8973A_REG_END,
221};
222
223/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
224static int rt8973a_muic_set_path(struct rt8973a_muic_info *info,
225 unsigned int con_sw, bool attached)
226{
227 int ret;
228
229 /*
230 * Don't need to set h/w path according to cable type
231 * if Auto-configuration mode of CONTROL1 register is true.
232 */
233 if (info->auto_config)
234 return 0;
235
236 if (!attached)
237 con_sw = DM_DP_SWITCH_UART;
238
239 switch (con_sw) {
240 case DM_DP_SWITCH_OPEN:
241 case DM_DP_SWITCH_USB:
242 case DM_DP_SWITCH_UART:
243 ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1,
244 RT8973A_REG_MANUAL_SW1_DP_MASK |
245 RT8973A_REG_MANUAL_SW1_DM_MASK,
246 con_sw);
247 if (ret < 0) {
248 dev_err(info->dev,
249 "cannot update DM_CON/DP_CON switch\n");
250 return ret;
251 }
252 break;
253 default:
254 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
255 con_sw);
256 return -EINVAL;
257 }
258
259 return 0;
260}
261
262static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info)
263{
264 unsigned int adc, dev1;
265 int ret, cable_type;
266
267 /* Read ADC value according to external cable or button */
268 ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc);
269 if (ret) {
270 dev_err(info->dev, "failed to read ADC register\n");
271 return ret;
272 }
273 cable_type = adc & RT8973A_REG_ADC_MASK;
274
275 /* Read Device 1 reigster to identify correct cable type */
276 ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1);
277 if (ret) {
278 dev_err(info->dev, "failed to read DEV1 register\n");
279 return ret;
280 }
281
282 switch (adc) {
283 case RT8973A_MUIC_ADC_OPEN:
284 if (dev1 & RT8973A_REG_DEV1_USB_MASK)
285 cable_type = RT8973A_MUIC_ADC_USB;
286 else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK)
287 cable_type = RT8973A_MUIC_ADC_TA;
288 else
289 cable_type = RT8973A_MUIC_ADC_OPEN;
290 break;
291 default:
292 break;
293 }
294
295 return cable_type;
296}
297
298static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info,
299 enum rt8973a_event_type event)
300{
301 static unsigned int prev_cable_type;
302 unsigned int con_sw = DM_DP_SWITCH_UART;
303 int ret, cable_type;
304 unsigned int id;
305 bool attached = false;
306
307 switch (event) {
308 case RT8973A_EVENT_ATTACH:
309 cable_type = rt8973a_muic_get_cable_type(info);
310 attached = true;
311 break;
312 case RT8973A_EVENT_DETACH:
313 cable_type = prev_cable_type;
314 attached = false;
315 break;
316 case RT8973A_EVENT_OVP:
317 case RT8973A_EVENT_OTP:
318 dev_warn(info->dev,
319 "happen Over %s issue. Need to disconnect all cables\n",
320 event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature");
321 cable_type = prev_cable_type;
322 attached = false;
323 break;
324 default:
325 dev_err(info->dev,
326 "Cannot handle this event (event:%d)\n", event);
327 return -EINVAL;
328 }
329 prev_cable_type = cable_type;
330
331 switch (cable_type) {
332 case RT8973A_MUIC_ADC_OTG:
333 id = EXTCON_USB_HOST;
334 con_sw = DM_DP_SWITCH_USB;
335 break;
336 case RT8973A_MUIC_ADC_TA:
337 id = EXTCON_CHG_USB_DCP;
338 con_sw = DM_DP_SWITCH_OPEN;
339 break;
340 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
341 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
342 id = EXTCON_JIG;
343 con_sw = DM_DP_SWITCH_USB;
344 break;
345 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
346 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
347 id = EXTCON_JIG;
348 con_sw = DM_DP_SWITCH_UART;
349 break;
350 case RT8973A_MUIC_ADC_USB:
351 id = EXTCON_USB;
352 con_sw = DM_DP_SWITCH_USB;
353 break;
354 case RT8973A_MUIC_ADC_OPEN:
355 return 0;
356 case RT8973A_MUIC_ADC_UNKNOWN_ACC_1:
357 case RT8973A_MUIC_ADC_UNKNOWN_ACC_2:
358 case RT8973A_MUIC_ADC_UNKNOWN_ACC_3:
359 case RT8973A_MUIC_ADC_UNKNOWN_ACC_4:
360 case RT8973A_MUIC_ADC_UNKNOWN_ACC_5:
361 dev_warn(info->dev,
362 "Unknown accessory type (adc:0x%x)\n", cable_type);
363 return 0;
364 case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON:
365 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON:
366 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON:
367 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON:
368 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON:
369 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON:
370 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON:
371 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON:
372 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON:
373 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON:
374 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON:
375 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON:
376 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON:
377 case RT8973A_MUIC_ADC_AUDIO_TYPE2:
378 dev_warn(info->dev,
379 "Audio device/button type (adc:0x%x)\n", cable_type);
380 return 0;
381 case RT8973A_MUIC_ADC_RESERVED_ACC_1:
382 case RT8973A_MUIC_ADC_RESERVED_ACC_2:
383 case RT8973A_MUIC_ADC_RESERVED_ACC_3:
384 case RT8973A_MUIC_ADC_RESERVED_ACC_4:
385 case RT8973A_MUIC_ADC_RESERVED_ACC_5:
386 case RT8973A_MUIC_ADC_PHONE_POWERED_DEV:
387 return 0;
388 default:
389 dev_err(info->dev,
390 "Cannot handle this cable_type (adc:0x%x)\n",
391 cable_type);
392 return -EINVAL;
393 }
394
395 /* Change internal hardware path(DM_CON/DP_CON) */
396 ret = rt8973a_muic_set_path(info, con_sw, attached);
397 if (ret < 0)
398 return ret;
399
400 /* Change the state of external accessory */
401 extcon_set_cable_state_(info->edev, id, attached);
402 if (id == EXTCON_USB)
403 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SDP,
404 attached);
405
406 return 0;
407}
408
409static void rt8973a_muic_irq_work(struct work_struct *work)
410{
411 struct rt8973a_muic_info *info = container_of(work,
412 struct rt8973a_muic_info, irq_work);
413 int ret = 0;
414
415 if (!info->edev)
416 return;
417
418 mutex_lock(&info->mutex);
419
420 /* Detect attached or detached cables */
421 if (info->irq_attach) {
422 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
423 info->irq_attach = false;
424 }
425
426 if (info->irq_detach) {
427 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH);
428 info->irq_detach = false;
429 }
430
431 if (info->irq_ovp) {
432 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP);
433 info->irq_ovp = false;
434 }
435
436 if (info->irq_otp) {
437 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP);
438 info->irq_otp = false;
439 }
440
441 if (ret < 0)
442 dev_err(info->dev, "failed to handle MUIC interrupt\n");
443
444 mutex_unlock(&info->mutex);
445}
446
447static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data)
448{
449 struct rt8973a_muic_info *info = data;
450 int i, irq_type = -1;
451
452 for (i = 0; i < info->num_muic_irqs; i++)
453 if (irq == info->muic_irqs[i].virq)
454 irq_type = info->muic_irqs[i].irq;
455
456 switch (irq_type) {
457 case RT8973A_INT1_ATTACH:
458 info->irq_attach = true;
459 break;
460 case RT8973A_INT1_DETACH:
461 info->irq_detach = true;
462 break;
463 case RT8973A_INT1_OVP:
464 info->irq_ovp = true;
465 break;
466 case RT8973A_INT1_OTP:
467 info->irq_otp = true;
468 break;
469 case RT8973A_INT1_CHGDET:
470 case RT8973A_INT1_DCD_T:
471 case RT8973A_INT1_CONNECT:
472 case RT8973A_INT1_ADC_CHG:
473 case RT8973A_INT2_UVLO:
474 case RT8973A_INT2_POR:
475 case RT8973A_INT2_OTP_FET:
476 case RT8973A_INT2_OVP_FET:
477 case RT8973A_INT2_OCP_LATCH:
478 case RT8973A_INT2_OCP:
479 case RT8973A_INT2_OVP_OCP:
480 default:
481 dev_dbg(info->dev,
482 "Cannot handle this interrupt (%d)\n", irq_type);
483 break;
484 }
485
486 schedule_work(&info->irq_work);
487
488 return IRQ_HANDLED;
489}
490
491static void rt8973a_muic_detect_cable_wq(struct work_struct *work)
492{
493 struct rt8973a_muic_info *info = container_of(to_delayed_work(work),
494 struct rt8973a_muic_info, wq_detcable);
495 int ret;
496
497 /* Notify the state of connector cable or not */
498 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
499 if (ret < 0)
500 dev_warn(info->dev, "failed to detect cable state\n");
501}
502
503static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)
504{
505 unsigned int data, vendor_id, version_id;
506 int i, ret;
507
508 /* To test I2C, Print version_id and vendor_id of RT8973A */
509 ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data);
510 if (ret) {
511 dev_err(info->dev,
512 "failed to read DEVICE_ID register: %d\n", ret);
513 return;
514 }
515
516 vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >>
517 RT8973A_REG_DEVICE_ID_VENDOR_SHIFT);
518 version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >>
519 RT8973A_REG_DEVICE_ID_VERSION_SHIFT);
520
521 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
522 version_id, vendor_id);
523
524 /* Initiazle the register of RT8973A device to bring-up */
525 for (i = 0; i < info->num_reg_data; i++) {
526 u8 reg = info->reg_data[i].reg;
527 u8 mask = info->reg_data[i].mask;
528 u8 val = 0;
529
530 if (info->reg_data[i].invert)
531 val = ~info->reg_data[i].val;
532 else
533 val = info->reg_data[i].val;
534
535 regmap_update_bits(info->regmap, reg, mask, val);
536 }
537
538 /* Check whether RT8973A is auto swithcing mode or not */
539 ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data);
540 if (ret) {
541 dev_err(info->dev,
542 "failed to read CONTROL1 register: %d\n", ret);
543 return;
544 }
545
546 data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK;
547 if (data) {
548 info->auto_config = true;
549 dev_info(info->dev,
550 "Enable Auto-configuration for internal path\n");
551 }
552}
553
554static int rt8973a_muic_i2c_probe(struct i2c_client *i2c,
555 const struct i2c_device_id *id)
556{
557 struct device_node *np = i2c->dev.of_node;
558 struct rt8973a_muic_info *info;
559 int i, ret, irq_flags;
560
561 if (!np)
562 return -EINVAL;
563
564 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
565 if (!info)
566 return -ENOMEM;
567 i2c_set_clientdata(i2c, info);
568
569 info->dev = &i2c->dev;
570 info->i2c = i2c;
571 info->irq = i2c->irq;
572 info->muic_irqs = rt8973a_muic_irqs;
573 info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs);
574 info->reg_data = rt8973a_reg_data;
575 info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data);
576
577 mutex_init(&info->mutex);
578
579 INIT_WORK(&info->irq_work, rt8973a_muic_irq_work);
580
581 info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config);
582 if (IS_ERR(info->regmap)) {
583 ret = PTR_ERR(info->regmap);
584 dev_err(info->dev, "failed to allocate register map: %d\n",
585 ret);
586 return ret;
587 }
588
589 /* Support irq domain for RT8973A MUIC device */
590 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
591 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
592 &rt8973a_muic_irq_chip, &info->irq_data);
593 if (ret != 0) {
594 dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n",
595 info->irq, ret);
596 return ret;
597 }
598
599 for (i = 0; i < info->num_muic_irqs; i++) {
600 struct muic_irq *muic_irq = &info->muic_irqs[i];
601 int virq = 0;
602
603 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
604 if (virq <= 0)
605 return -EINVAL;
606 muic_irq->virq = virq;
607
608 ret = devm_request_threaded_irq(info->dev, virq, NULL,
609 rt8973a_muic_irq_handler,
610 IRQF_NO_SUSPEND | IRQF_ONESHOT,
611 muic_irq->name, info);
612 if (ret) {
613 dev_err(info->dev,
614 "failed: irq request (IRQ: %d, error :%d)\n",
615 muic_irq->irq, ret);
616 return ret;
617 }
618 }
619
620 /* Allocate extcon device */
621 info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable);
622 if (IS_ERR(info->edev)) {
623 dev_err(info->dev, "failed to allocate memory for extcon\n");
624 return -ENOMEM;
625 }
626
627 /* Register extcon device */
628 ret = devm_extcon_dev_register(info->dev, info->edev);
629 if (ret) {
630 dev_err(info->dev, "failed to register extcon device\n");
631 return ret;
632 }
633
634 /*
635 * Detect accessory after completing the initialization of platform
636 *
637 * - Use delayed workqueue to detect cable state and then
638 * notify cable state to notifiee/platform through uevent.
639 * After completing the booting of platform, the extcon provider
640 * driver should notify cable state to upper layer.
641 */
642 INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq);
643 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
644 msecs_to_jiffies(DELAY_MS_DEFAULT));
645
646 /* Initialize RT8973A device and print vendor id and version id */
647 rt8973a_init_dev_type(info);
648
649 return 0;
650}
651
652static int rt8973a_muic_i2c_remove(struct i2c_client *i2c)
653{
654 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
655
656 regmap_del_irq_chip(info->irq, info->irq_data);
657
658 return 0;
659}
660
661static const struct of_device_id rt8973a_dt_match[] = {
662 { .compatible = "richtek,rt8973a-muic" },
663 { },
664};
665MODULE_DEVICE_TABLE(of, rt8973a_dt_match);
666
667#ifdef CONFIG_PM_SLEEP
668static int rt8973a_muic_suspend(struct device *dev)
669{
670 struct i2c_client *i2c = to_i2c_client(dev);
671 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
672
673 enable_irq_wake(info->irq);
674
675 return 0;
676}
677
678static int rt8973a_muic_resume(struct device *dev)
679{
680 struct i2c_client *i2c = to_i2c_client(dev);
681 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
682
683 disable_irq_wake(info->irq);
684
685 return 0;
686}
687#endif
688
689static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops,
690 rt8973a_muic_suspend, rt8973a_muic_resume);
691
692static const struct i2c_device_id rt8973a_i2c_id[] = {
693 { "rt8973a", TYPE_RT8973A },
694 { }
695};
696MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id);
697
698static struct i2c_driver rt8973a_muic_i2c_driver = {
699 .driver = {
700 .name = "rt8973a",
701 .pm = &rt8973a_muic_pm_ops,
702 .of_match_table = rt8973a_dt_match,
703 },
704 .probe = rt8973a_muic_i2c_probe,
705 .remove = rt8973a_muic_i2c_remove,
706 .id_table = rt8973a_i2c_id,
707};
708
709static int __init rt8973a_muic_i2c_init(void)
710{
711 return i2c_add_driver(&rt8973a_muic_i2c_driver);
712}
713subsys_initcall(rt8973a_muic_i2c_init);
714
715MODULE_DESCRIPTION("Richtek RT8973A Extcon driver");
716MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
717MODULE_LICENSE("GPL");