2 * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
4 * Copyright (C) 2012 Samsung Electronics
5 * Donggeun Kim <dg77.kim@samsung.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/i2c.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
23 #include <linux/err.h>
24 #include <linux/platform_device.h>
25 #include <linux/kobject.h>
26 #include <linux/mfd/max8997.h>
27 #include <linux/mfd/max8997-private.h>
28 #include <linux/extcon.h>
29 #include <linux/irqdomain.h>
31 #define DEV_NAME "max8997-muic"
32 #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
34 enum max8997_muic_adc_debounce_time
{
35 ADC_DEBOUNCE_TIME_0_5MS
= 0, /* 0.5ms */
36 ADC_DEBOUNCE_TIME_10MS
, /* 10ms */
37 ADC_DEBOUNCE_TIME_25MS
, /* 25ms */
38 ADC_DEBOUNCE_TIME_38_62MS
, /* 38.62ms */
41 struct max8997_muic_irq
{
47 static struct max8997_muic_irq muic_irqs
[] = {
48 { MAX8997_MUICIRQ_ADCError
, "muic-ADCERROR" },
49 { MAX8997_MUICIRQ_ADCLow
, "muic-ADCLOW" },
50 { MAX8997_MUICIRQ_ADC
, "muic-ADC" },
51 { MAX8997_MUICIRQ_VBVolt
, "muic-VBVOLT" },
52 { MAX8997_MUICIRQ_DBChg
, "muic-DBCHG" },
53 { MAX8997_MUICIRQ_DCDTmr
, "muic-DCDTMR" },
54 { MAX8997_MUICIRQ_ChgDetRun
, "muic-CHGDETRUN" },
55 { MAX8997_MUICIRQ_ChgTyp
, "muic-CHGTYP" },
56 { MAX8997_MUICIRQ_OVP
, "muic-OVP" },
59 /* Define supported cable type */
60 enum max8997_muic_acc_type
{
61 MAX8997_MUIC_ADC_GROUND
= 0x0,
62 MAX8997_MUIC_ADC_MHL
, /* MHL*/
63 MAX8997_MUIC_ADC_REMOTE_S1_BUTTON
,
64 MAX8997_MUIC_ADC_REMOTE_S2_BUTTON
,
65 MAX8997_MUIC_ADC_REMOTE_S3_BUTTON
,
66 MAX8997_MUIC_ADC_REMOTE_S4_BUTTON
,
67 MAX8997_MUIC_ADC_REMOTE_S5_BUTTON
,
68 MAX8997_MUIC_ADC_REMOTE_S6_BUTTON
,
69 MAX8997_MUIC_ADC_REMOTE_S7_BUTTON
,
70 MAX8997_MUIC_ADC_REMOTE_S8_BUTTON
,
71 MAX8997_MUIC_ADC_REMOTE_S9_BUTTON
,
72 MAX8997_MUIC_ADC_REMOTE_S10_BUTTON
,
73 MAX8997_MUIC_ADC_REMOTE_S11_BUTTON
,
74 MAX8997_MUIC_ADC_REMOTE_S12_BUTTON
,
75 MAX8997_MUIC_ADC_RESERVED_ACC_1
,
76 MAX8997_MUIC_ADC_RESERVED_ACC_2
,
77 MAX8997_MUIC_ADC_RESERVED_ACC_3
,
78 MAX8997_MUIC_ADC_RESERVED_ACC_4
,
79 MAX8997_MUIC_ADC_RESERVED_ACC_5
,
80 MAX8997_MUIC_ADC_CEA936_AUDIO
,
81 MAX8997_MUIC_ADC_PHONE_POWERED_DEV
,
82 MAX8997_MUIC_ADC_TTY_CONVERTER
,
83 MAX8997_MUIC_ADC_UART_CABLE
,
84 MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG
,
85 MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF
, /* JIG-USB-OFF */
86 MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON
, /* JIG-USB-ON */
87 MAX8997_MUIC_ADC_AV_CABLE_NOLOAD
, /* DESKDOCK */
88 MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG
,
89 MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF
, /* JIG-UART */
90 MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON
, /* CARDOCK */
91 MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE
,
92 MAX8997_MUIC_ADC_OPEN
, /* OPEN */
95 enum max8997_muic_cable_group
{
96 MAX8997_CABLE_GROUP_ADC
= 0,
97 MAX8997_CABLE_GROUP_ADC_GND
,
98 MAX8997_CABLE_GROUP_CHG
,
99 MAX8997_CABLE_GROUP_VBVOLT
,
102 enum max8997_muic_usb_type
{
107 enum max8997_muic_charger_type
{
108 MAX8997_CHARGER_TYPE_NONE
= 0,
109 MAX8997_CHARGER_TYPE_USB
,
110 MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT
,
111 MAX8997_CHARGER_TYPE_DEDICATED_CHG
,
112 MAX8997_CHARGER_TYPE_500MA
,
113 MAX8997_CHARGER_TYPE_1A
,
114 MAX8997_CHARGER_TYPE_DEAD_BATTERY
= 7,
117 struct max8997_muic_info
{
119 struct i2c_client
*muic
;
120 struct extcon_dev
*edev
;
126 struct work_struct irq_work
;
129 struct max8997_muic_platform_data
*muic_pdata
;
130 enum max8997_muic_charger_type pre_charger_type
;
133 * Use delayed workqueue to detect cable state and then
134 * notify cable state to notifiee/platform through uevent.
135 * After completing the booting of platform, the extcon provider
136 * driver should notify cable state to upper layer.
138 struct delayed_work wq_detcable
;
141 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
142 * h/w path of COMP2/COMN1 on CONTROL1 register.
148 static const unsigned int max8997_extcon_cable
[] = {
154 EXTCON_CHARGE_DOWNSTREAM
,
162 * max8997_muic_set_debounce_time - Set the debounce time of ADC
163 * @info: the instance including private data of max8997 MUIC
164 * @time: the debounce time of ADC
166 static int max8997_muic_set_debounce_time(struct max8997_muic_info
*info
,
167 enum max8997_muic_adc_debounce_time time
)
172 case ADC_DEBOUNCE_TIME_0_5MS
:
173 case ADC_DEBOUNCE_TIME_10MS
:
174 case ADC_DEBOUNCE_TIME_25MS
:
175 case ADC_DEBOUNCE_TIME_38_62MS
:
176 ret
= max8997_update_reg(info
->muic
,
177 MAX8997_MUIC_REG_CONTROL3
,
178 time
<< CONTROL3_ADCDBSET_SHIFT
,
179 CONTROL3_ADCDBSET_MASK
);
181 dev_err(info
->dev
, "failed to set ADC debounce time\n");
186 dev_err(info
->dev
, "invalid ADC debounce time\n");
194 * max8997_muic_set_path - Set hardware line according to attached cable
195 * @info: the instance including private data of max8997 MUIC
196 * @value: the path according to attached cable
197 * @attached: the state of cable (true:attached, false:detached)
199 * The max8997 MUIC device share outside H/W line among a varity of cables,
200 * so this function set internal path of H/W line according to the type of
203 static int max8997_muic_set_path(struct max8997_muic_info
*info
,
204 u8 val
, bool attached
)
212 ctrl1
= CONTROL1_SW_OPEN
;
214 ret
= max8997_update_reg(info
->muic
,
215 MAX8997_MUIC_REG_CONTROL1
, ctrl1
, COMP_SW_MASK
);
217 dev_err(info
->dev
, "failed to update MUIC register\n");
222 ctrl2
|= CONTROL2_CPEN_MASK
; /* LowPwr=0, CPEn=1 */
224 ctrl2
|= CONTROL2_LOWPWR_MASK
; /* LowPwr=1, CPEn=0 */
226 ret
= max8997_update_reg(info
->muic
,
227 MAX8997_MUIC_REG_CONTROL2
, ctrl2
,
228 CONTROL2_LOWPWR_MASK
| CONTROL2_CPEN_MASK
);
230 dev_err(info
->dev
, "failed to update MUIC register\n");
235 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
236 ctrl1
, ctrl2
, attached
? "attached" : "detached");
242 * max8997_muic_get_cable_type - Return cable type and check cable state
243 * @info: the instance including private data of max8997 MUIC
244 * @group: the path according to attached cable
245 * @attached: store cable state and return
247 * This function check the cable state either attached or detached,
248 * and then divide precise type of cable according to cable group.
249 * - MAX8997_CABLE_GROUP_ADC
250 * - MAX8997_CABLE_GROUP_CHG
252 static int max8997_muic_get_cable_type(struct max8997_muic_info
*info
,
253 enum max8997_muic_cable_group group
, bool *attached
)
260 case MAX8997_CABLE_GROUP_ADC
:
262 * Read ADC value to check cable type and decide cable state
263 * according to cable type
265 adc
= info
->status
[0] & STATUS1_ADC_MASK
;
266 adc
>>= STATUS1_ADC_SHIFT
;
269 * Check current cable state/cable type and store cable type
270 * (info->prev_cable_type) for handling cable when cable is
273 if (adc
== MAX8997_MUIC_ADC_OPEN
) {
276 cable_type
= info
->prev_cable_type
;
277 info
->prev_cable_type
= MAX8997_MUIC_ADC_OPEN
;
281 cable_type
= info
->prev_cable_type
= adc
;
284 case MAX8997_CABLE_GROUP_CHG
:
286 * Read charger type to check cable type and decide cable state
287 * according to type of charger cable.
289 chg_type
= info
->status
[1] & STATUS2_CHGTYP_MASK
;
290 chg_type
>>= STATUS2_CHGTYP_SHIFT
;
292 if (chg_type
== MAX8997_CHARGER_TYPE_NONE
) {
295 cable_type
= info
->prev_chg_type
;
296 info
->prev_chg_type
= MAX8997_CHARGER_TYPE_NONE
;
301 * Check current cable state/cable type and store cable
302 * type(info->prev_chg_type) for handling cable when
303 * charger cable is detached.
305 cable_type
= info
->prev_chg_type
= chg_type
;
310 dev_err(info
->dev
, "Unknown cable group (%d)\n", group
);
311 cable_type
= -EINVAL
;
318 static int max8997_muic_handle_usb(struct max8997_muic_info
*info
,
319 enum max8997_muic_usb_type usb_type
, bool attached
)
323 if (usb_type
== MAX8997_USB_HOST
) {
324 ret
= max8997_muic_set_path(info
, info
->path_usb
, attached
);
326 dev_err(info
->dev
, "failed to update muic register\n");
332 case MAX8997_USB_HOST
:
333 extcon_set_cable_state_(info
->edev
, EXTCON_USB_HOST
, attached
);
335 case MAX8997_USB_DEVICE
:
336 extcon_set_cable_state_(info
->edev
, EXTCON_USB
, attached
);
339 dev_err(info
->dev
, "failed to detect %s usb cable\n",
340 attached
? "attached" : "detached");
347 static int max8997_muic_handle_dock(struct max8997_muic_info
*info
,
348 int cable_type
, bool attached
)
352 ret
= max8997_muic_set_path(info
, CONTROL1_SW_AUDIO
, attached
);
354 dev_err(info
->dev
, "failed to update muic register\n");
358 switch (cable_type
) {
359 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD
:
360 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON
:
361 extcon_set_cable_state_(info
->edev
, EXTCON_DOCK
, attached
);
364 dev_err(info
->dev
, "failed to detect %s dock device\n",
365 attached
? "attached" : "detached");
372 static int max8997_muic_handle_jig_uart(struct max8997_muic_info
*info
,
378 ret
= max8997_muic_set_path(info
, info
->path_uart
, attached
);
380 dev_err(info
->dev
, "failed to update muic register\n");
384 extcon_set_cable_state_(info
->edev
, EXTCON_JIG
, attached
);
389 static int max8997_muic_adc_handler(struct max8997_muic_info
*info
)
395 /* Check cable state which is either detached or attached */
396 cable_type
= max8997_muic_get_cable_type(info
,
397 MAX8997_CABLE_GROUP_ADC
, &attached
);
399 switch (cable_type
) {
400 case MAX8997_MUIC_ADC_GROUND
:
401 ret
= max8997_muic_handle_usb(info
, MAX8997_USB_HOST
, attached
);
405 case MAX8997_MUIC_ADC_MHL
:
406 extcon_set_cable_state_(info
->edev
, EXTCON_MHL
, attached
);
408 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF
:
409 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON
:
410 ret
= max8997_muic_handle_usb(info
,
411 MAX8997_USB_DEVICE
, attached
);
415 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD
:
416 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON
:
417 ret
= max8997_muic_handle_dock(info
, cable_type
, attached
);
421 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF
:
422 ret
= max8997_muic_handle_jig_uart(info
, attached
);
424 case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON
:
425 case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON
:
426 case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON
:
427 case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON
:
428 case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON
:
429 case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON
:
430 case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON
:
431 case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON
:
432 case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON
:
433 case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON
:
434 case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON
:
435 case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON
:
436 case MAX8997_MUIC_ADC_RESERVED_ACC_1
:
437 case MAX8997_MUIC_ADC_RESERVED_ACC_2
:
438 case MAX8997_MUIC_ADC_RESERVED_ACC_3
:
439 case MAX8997_MUIC_ADC_RESERVED_ACC_4
:
440 case MAX8997_MUIC_ADC_RESERVED_ACC_5
:
441 case MAX8997_MUIC_ADC_CEA936_AUDIO
:
442 case MAX8997_MUIC_ADC_PHONE_POWERED_DEV
:
443 case MAX8997_MUIC_ADC_TTY_CONVERTER
:
444 case MAX8997_MUIC_ADC_UART_CABLE
:
445 case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG
:
446 case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG
:
447 case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE
:
449 * This cable isn't used in general case if it is specially
450 * needed to detect additional cable, should implement
451 * proper operation when this cable is attached/detached.
454 "cable is %s but it isn't used (type:0x%x)\n",
455 attached
? "attached" : "detached", cable_type
);
459 "failed to detect %s unknown cable (type:0x%x)\n",
460 attached
? "attached" : "detached", cable_type
);
467 static int max8997_muic_chg_handler(struct max8997_muic_info
*info
)
473 chg_type
= max8997_muic_get_cable_type(info
,
474 MAX8997_CABLE_GROUP_CHG
, &attached
);
477 case MAX8997_CHARGER_TYPE_NONE
:
479 case MAX8997_CHARGER_TYPE_USB
:
480 adc
= info
->status
[0] & STATUS1_ADC_MASK
;
481 adc
>>= STATUS1_ADC_SHIFT
;
483 if ((adc
& STATUS1_ADC_MASK
) == MAX8997_MUIC_ADC_OPEN
) {
484 max8997_muic_handle_usb(info
,
485 MAX8997_USB_DEVICE
, attached
);
488 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT
:
489 extcon_set_cable_state_(info
->edev
, EXTCON_CHARGE_DOWNSTREAM
,
492 case MAX8997_CHARGER_TYPE_DEDICATED_CHG
:
493 extcon_set_cable_state_(info
->edev
, EXTCON_TA
, attached
);
495 case MAX8997_CHARGER_TYPE_500MA
:
496 extcon_set_cable_state_(info
->edev
, EXTCON_SLOW_CHARGER
,
499 case MAX8997_CHARGER_TYPE_1A
:
500 extcon_set_cable_state_(info
->edev
, EXTCON_FAST_CHARGER
,
505 "failed to detect %s unknown chg cable (type:0x%x)\n",
506 attached
? "attached" : "detached", chg_type
);
513 static void max8997_muic_irq_work(struct work_struct
*work
)
515 struct max8997_muic_info
*info
= container_of(work
,
516 struct max8997_muic_info
, irq_work
);
523 mutex_lock(&info
->mutex
);
525 for (i
= 0; i
< ARRAY_SIZE(muic_irqs
); i
++)
526 if (info
->irq
== muic_irqs
[i
].virq
)
527 irq_type
= muic_irqs
[i
].irq
;
529 ret
= max8997_bulk_read(info
->muic
, MAX8997_MUIC_REG_STATUS1
,
532 dev_err(info
->dev
, "failed to read muic register\n");
533 mutex_unlock(&info
->mutex
);
538 case MAX8997_MUICIRQ_ADCError
:
539 case MAX8997_MUICIRQ_ADCLow
:
540 case MAX8997_MUICIRQ_ADC
:
541 /* Handle all of cable except for charger cable */
542 ret
= max8997_muic_adc_handler(info
);
544 case MAX8997_MUICIRQ_VBVolt
:
545 case MAX8997_MUICIRQ_DBChg
:
546 case MAX8997_MUICIRQ_DCDTmr
:
547 case MAX8997_MUICIRQ_ChgDetRun
:
548 case MAX8997_MUICIRQ_ChgTyp
:
549 /* Handle charger cable */
550 ret
= max8997_muic_chg_handler(info
);
552 case MAX8997_MUICIRQ_OVP
:
555 dev_info(info
->dev
, "misc interrupt: irq %d occurred\n",
557 mutex_unlock(&info
->mutex
);
562 dev_err(info
->dev
, "failed to handle MUIC interrupt\n");
564 mutex_unlock(&info
->mutex
);
567 static irqreturn_t
max8997_muic_irq_handler(int irq
, void *data
)
569 struct max8997_muic_info
*info
= data
;
571 dev_dbg(info
->dev
, "irq:%d\n", irq
);
574 schedule_work(&info
->irq_work
);
579 static int max8997_muic_detect_dev(struct max8997_muic_info
*info
)
586 mutex_lock(&info
->mutex
);
588 /* Read STATUSx register to detect accessory */
589 ret
= max8997_bulk_read(info
->muic
,
590 MAX8997_MUIC_REG_STATUS1
, 2, info
->status
);
592 dev_err(info
->dev
, "failed to read MUIC register\n");
593 mutex_unlock(&info
->mutex
);
597 adc
= max8997_muic_get_cable_type(info
, MAX8997_CABLE_GROUP_ADC
,
599 if (attached
&& adc
!= MAX8997_MUIC_ADC_OPEN
) {
600 ret
= max8997_muic_adc_handler(info
);
602 dev_err(info
->dev
, "Cannot detect ADC cable\n");
603 mutex_unlock(&info
->mutex
);
608 chg_type
= max8997_muic_get_cable_type(info
, MAX8997_CABLE_GROUP_CHG
,
610 if (attached
&& chg_type
!= MAX8997_CHARGER_TYPE_NONE
) {
611 ret
= max8997_muic_chg_handler(info
);
613 dev_err(info
->dev
, "Cannot detect charger cable\n");
614 mutex_unlock(&info
->mutex
);
619 mutex_unlock(&info
->mutex
);
624 static void max8997_muic_detect_cable_wq(struct work_struct
*work
)
626 struct max8997_muic_info
*info
= container_of(to_delayed_work(work
),
627 struct max8997_muic_info
, wq_detcable
);
630 ret
= max8997_muic_detect_dev(info
);
632 dev_err(info
->dev
, "failed to detect cable type\n");
635 static int max8997_muic_probe(struct platform_device
*pdev
)
637 struct max8997_dev
*max8997
= dev_get_drvdata(pdev
->dev
.parent
);
638 struct max8997_platform_data
*pdata
= dev_get_platdata(max8997
->dev
);
639 struct max8997_muic_info
*info
;
643 info
= devm_kzalloc(&pdev
->dev
, sizeof(struct max8997_muic_info
),
648 info
->dev
= &pdev
->dev
;
649 info
->muic
= max8997
->muic
;
651 platform_set_drvdata(pdev
, info
);
652 mutex_init(&info
->mutex
);
654 INIT_WORK(&info
->irq_work
, max8997_muic_irq_work
);
656 for (i
= 0; i
< ARRAY_SIZE(muic_irqs
); i
++) {
657 struct max8997_muic_irq
*muic_irq
= &muic_irqs
[i
];
658 unsigned int virq
= 0;
660 virq
= irq_create_mapping(max8997
->irq_domain
, muic_irq
->irq
);
665 muic_irq
->virq
= virq
;
667 ret
= request_threaded_irq(virq
, NULL
,
668 max8997_muic_irq_handler
,
670 muic_irq
->name
, info
);
673 "failed: irq request (IRQ: %d, error :%d)\n",
679 /* External connector */
680 info
->edev
= devm_extcon_dev_allocate(&pdev
->dev
, max8997_extcon_cable
);
681 if (IS_ERR(info
->edev
)) {
682 dev_err(&pdev
->dev
, "failed to allocate memory for extcon\n");
687 ret
= devm_extcon_dev_register(&pdev
->dev
, info
->edev
);
689 dev_err(&pdev
->dev
, "failed to register extcon device\n");
693 if (pdata
&& pdata
->muic_pdata
) {
694 struct max8997_muic_platform_data
*muic_pdata
697 /* Initialize registers according to platform data */
698 for (i
= 0; i
< muic_pdata
->num_init_data
; i
++) {
699 max8997_write_reg(info
->muic
,
700 muic_pdata
->init_data
[i
].addr
,
701 muic_pdata
->init_data
[i
].data
);
705 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
706 * h/w path of COMP2/COMN1 on CONTROL1 register.
708 if (muic_pdata
->path_uart
)
709 info
->path_uart
= muic_pdata
->path_uart
;
711 info
->path_uart
= CONTROL1_SW_UART
;
713 if (muic_pdata
->path_usb
)
714 info
->path_usb
= muic_pdata
->path_usb
;
716 info
->path_usb
= CONTROL1_SW_USB
;
719 * Default delay time for detecting cable state
720 * after certain time.
722 if (muic_pdata
->detcable_delay_ms
)
724 msecs_to_jiffies(muic_pdata
->detcable_delay_ms
);
726 delay_jiffies
= msecs_to_jiffies(DELAY_MS_DEFAULT
);
728 info
->path_uart
= CONTROL1_SW_UART
;
729 info
->path_usb
= CONTROL1_SW_USB
;
730 delay_jiffies
= msecs_to_jiffies(DELAY_MS_DEFAULT
);
733 /* Set initial path for UART */
734 max8997_muic_set_path(info
, info
->path_uart
, true);
736 /* Set ADC debounce time */
737 max8997_muic_set_debounce_time(info
, ADC_DEBOUNCE_TIME_25MS
);
740 * Detect accessory after completing the initialization of platform
742 * - Use delayed workqueue to detect cable state and then
743 * notify cable state to notifiee/platform through uevent.
744 * After completing the booting of platform, the extcon provider
745 * driver should notify cable state to upper layer.
747 INIT_DELAYED_WORK(&info
->wq_detcable
, max8997_muic_detect_cable_wq
);
748 queue_delayed_work(system_power_efficient_wq
, &info
->wq_detcable
,
755 free_irq(muic_irqs
[i
].virq
, info
);
759 static int max8997_muic_remove(struct platform_device
*pdev
)
761 struct max8997_muic_info
*info
= platform_get_drvdata(pdev
);
764 for (i
= 0; i
< ARRAY_SIZE(muic_irqs
); i
++)
765 free_irq(muic_irqs
[i
].virq
, info
);
766 cancel_work_sync(&info
->irq_work
);
771 static struct platform_driver max8997_muic_driver
= {
775 .probe
= max8997_muic_probe
,
776 .remove
= max8997_muic_remove
,
779 module_platform_driver(max8997_muic_driver
);
781 MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
782 MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
783 MODULE_LICENSE("GPL");