2 * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches
4 * Copyright (c) 2014 Samsung Electronics Co., Ltd
5 * Author: Chanwoo Choi <cw00.choi@samsung.com>
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.
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>
25 #include "extcon-rt8973a.h"
27 #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
42 struct rt8973a_muic_info {
44 struct extcon_dev *edev;
46 struct i2c_client *i2c;
47 struct regmap *regmap;
49 struct regmap_irq_chip_data *irq_data;
50 struct muic_irq *muic_irqs;
51 unsigned int num_muic_irqs;
57 struct work_struct irq_work;
59 struct reg_data *reg_data;
60 unsigned int num_reg_data;
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.
71 struct delayed_work wq_detcable;
74 /* Default value of RT8973A register to bring up MUIC device. */
75 static struct reg_data rt8973a_reg_data[] = {
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,
92 /* List of detectable cables */
95 EXTCON_CABLE_USB_HOST,
102 static const char *rt8973a_extcon_cable[] = {
103 [EXTCON_CABLE_USB] = "USB",
104 [EXTCON_CABLE_USB_HOST] = "USB-Host",
105 [EXTCON_CABLE_TA] = "TA",
106 [EXTCON_CABLE_JIG] = "JIG",
110 /* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */
111 enum rt8973a_event_type {
112 RT8973A_EVENT_ATTACH = 1,
113 RT8973A_EVENT_DETACH,
118 /* Define supported accessory type */
119 enum rt8973a_muic_acc_type {
120 RT8973A_MUIC_ADC_OTG = 0x0,
121 RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON,
122 RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON,
123 RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON,
124 RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON,
125 RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON,
126 RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON,
127 RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON,
128 RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON,
129 RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON,
130 RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON,
131 RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON,
132 RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON,
133 RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON,
134 RT8973A_MUIC_ADC_RESERVED_ACC_1,
135 RT8973A_MUIC_ADC_RESERVED_ACC_2,
136 RT8973A_MUIC_ADC_RESERVED_ACC_3,
137 RT8973A_MUIC_ADC_RESERVED_ACC_4,
138 RT8973A_MUIC_ADC_RESERVED_ACC_5,
139 RT8973A_MUIC_ADC_AUDIO_TYPE2,
140 RT8973A_MUIC_ADC_PHONE_POWERED_DEV,
141 RT8973A_MUIC_ADC_UNKNOWN_ACC_1,
142 RT8973A_MUIC_ADC_UNKNOWN_ACC_2,
144 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
145 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
146 RT8973A_MUIC_ADC_UNKNOWN_ACC_3,
147 RT8973A_MUIC_ADC_UNKNOWN_ACC_4,
148 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
149 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
150 RT8973A_MUIC_ADC_UNKNOWN_ACC_5,
151 RT8973A_MUIC_ADC_OPEN = 0x1f,
153 /* The below accessories has same ADC value (0x1f).
154 So, Device type1 is used to separate specific accessory. */
155 /* |---------|--ADC| */
157 RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */
160 /* List of supported interrupt for RT8973A */
161 static struct muic_irq rt8973a_muic_irqs[] = {
162 { RT8973A_INT1_ATTACH, "muic-attach" },
163 { RT8973A_INT1_DETACH, "muic-detach" },
164 { RT8973A_INT1_CHGDET, "muic-chgdet" },
165 { RT8973A_INT1_DCD_T, "muic-dcd-t" },
166 { RT8973A_INT1_OVP, "muic-ovp" },
167 { RT8973A_INT1_CONNECT, "muic-connect" },
168 { RT8973A_INT1_ADC_CHG, "muic-adc-chg" },
169 { RT8973A_INT1_OTP, "muic-otp" },
170 { RT8973A_INT2_UVLO, "muic-uvlo" },
171 { RT8973A_INT2_POR, "muic-por" },
172 { RT8973A_INT2_OTP_FET, "muic-otp-fet" },
173 { RT8973A_INT2_OVP_FET, "muic-ovp-fet" },
174 { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" },
175 { RT8973A_INT2_OCP, "muic-ocp" },
176 { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" },
179 /* Define interrupt list of RT8973A to register regmap_irq */
180 static const struct regmap_irq rt8973a_irqs[] = {
181 /* INT1 interrupts */
182 { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, },
183 { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, },
184 { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, },
185 { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, },
186 { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, },
187 { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, },
188 { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, },
189 { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, },
191 /* INT2 interrupts */
192 { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,},
193 { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, },
194 { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, },
195 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, },
196 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, },
197 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, },
198 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, },
201 static const struct regmap_irq_chip rt8973a_muic_irq_chip = {
203 .status_base = RT8973A_REG_INT1,
204 .mask_base = RT8973A_REG_INTM1,
205 .mask_invert = false,
207 .irqs = rt8973a_irqs,
208 .num_irqs = ARRAY_SIZE(rt8973a_irqs),
211 /* Define regmap configuration of RT8973A for I2C communication */
212 static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg)
215 case RT8973A_REG_INTM1:
216 case RT8973A_REG_INTM2:
224 static const struct regmap_config rt8973a_muic_regmap_config = {
227 .volatile_reg = rt8973a_muic_volatile_reg,
228 .max_register = RT8973A_REG_END,
231 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
232 static int rt8973a_muic_set_path(struct rt8973a_muic_info *info,
233 unsigned int con_sw, bool attached)
238 * Don't need to set h/w path according to cable type
239 * if Auto-configuration mode of CONTROL1 register is true.
241 if (info->auto_config)
245 con_sw = DM_DP_SWITCH_UART;
248 case DM_DP_SWITCH_OPEN:
249 case DM_DP_SWITCH_USB:
250 case DM_DP_SWITCH_UART:
251 ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1,
252 RT8973A_REG_MANUAL_SW1_DP_MASK |
253 RT8973A_REG_MANUAL_SW1_DM_MASK,
257 "cannot update DM_CON/DP_CON switch\n");
262 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
270 static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info)
272 unsigned int adc, dev1;
275 /* Read ADC value according to external cable or button */
276 ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc);
278 dev_err(info->dev, "failed to read ADC register\n");
281 cable_type = adc & RT8973A_REG_ADC_MASK;
283 /* Read Device 1 reigster to identify correct cable type */
284 ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1);
286 dev_err(info->dev, "failed to read DEV1 register\n");
291 case RT8973A_MUIC_ADC_OPEN:
292 if (dev1 & RT8973A_REG_DEV1_USB_MASK)
293 cable_type = RT8973A_MUIC_ADC_USB;
294 else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK)
295 cable_type = RT8973A_MUIC_ADC_TA;
297 cable_type = RT8973A_MUIC_ADC_OPEN;
306 static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info,
307 enum rt8973a_event_type event)
309 static unsigned int prev_cable_type;
310 const char **cable_names = info->edev->supported_cable;
311 unsigned int con_sw = DM_DP_SWITCH_UART;
312 int ret, idx = 0, cable_type;
313 bool attached = false;
319 case RT8973A_EVENT_ATTACH:
320 cable_type = rt8973a_muic_get_cable_type(info);
323 case RT8973A_EVENT_DETACH:
324 cable_type = prev_cable_type;
327 case RT8973A_EVENT_OVP:
328 case RT8973A_EVENT_OTP:
330 "happen Over %s issue. Need to disconnect all cables\n",
331 event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature");
332 cable_type = prev_cable_type;
337 "Cannot handle this event (event:%d)\n", event);
340 prev_cable_type = cable_type;
342 switch (cable_type) {
343 case RT8973A_MUIC_ADC_OTG:
344 idx = EXTCON_CABLE_USB_HOST;
345 con_sw = DM_DP_SWITCH_USB;
347 case RT8973A_MUIC_ADC_TA:
348 idx = EXTCON_CABLE_TA;
349 con_sw = DM_DP_SWITCH_OPEN;
351 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
352 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
353 idx = EXTCON_CABLE_JIG;
354 con_sw = DM_DP_SWITCH_USB;
356 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
357 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
358 idx = EXTCON_CABLE_JIG;
359 con_sw = DM_DP_SWITCH_UART;
361 case RT8973A_MUIC_ADC_USB:
362 idx = EXTCON_CABLE_USB;
363 con_sw = DM_DP_SWITCH_USB;
365 case RT8973A_MUIC_ADC_OPEN:
367 case RT8973A_MUIC_ADC_UNKNOWN_ACC_1:
368 case RT8973A_MUIC_ADC_UNKNOWN_ACC_2:
369 case RT8973A_MUIC_ADC_UNKNOWN_ACC_3:
370 case RT8973A_MUIC_ADC_UNKNOWN_ACC_4:
371 case RT8973A_MUIC_ADC_UNKNOWN_ACC_5:
373 "Unknown accessory type (adc:0x%x)\n", cable_type);
375 case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON:
376 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON:
377 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON:
378 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON:
379 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON:
380 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON:
381 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON:
382 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON:
383 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON:
384 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON:
385 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON:
386 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON:
387 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON:
388 case RT8973A_MUIC_ADC_AUDIO_TYPE2:
390 "Audio device/button type (adc:0x%x)\n", cable_type);
392 case RT8973A_MUIC_ADC_RESERVED_ACC_1:
393 case RT8973A_MUIC_ADC_RESERVED_ACC_2:
394 case RT8973A_MUIC_ADC_RESERVED_ACC_3:
395 case RT8973A_MUIC_ADC_RESERVED_ACC_4:
396 case RT8973A_MUIC_ADC_RESERVED_ACC_5:
397 case RT8973A_MUIC_ADC_PHONE_POWERED_DEV:
401 "Cannot handle this cable_type (adc:0x%x)\n",
406 /* Change internal hardware path(DM_CON/DP_CON) */
407 ret = rt8973a_muic_set_path(info, con_sw, attached);
411 /* Change the state of external accessory */
412 extcon_set_cable_state(info->edev, cable_names[idx], attached);
417 static void rt8973a_muic_irq_work(struct work_struct *work)
419 struct rt8973a_muic_info *info = container_of(work,
420 struct rt8973a_muic_info, irq_work);
426 mutex_lock(&info->mutex);
428 /* Detect attached or detached cables */
429 if (info->irq_attach) {
430 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
431 info->irq_attach = false;
434 if (info->irq_detach) {
435 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH);
436 info->irq_detach = false;
440 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP);
441 info->irq_ovp = false;
445 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP);
446 info->irq_otp = false;
450 dev_err(info->dev, "failed to handle MUIC interrupt\n");
452 mutex_unlock(&info->mutex);
455 static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data)
457 struct rt8973a_muic_info *info = data;
458 int i, irq_type = -1;
460 for (i = 0; i < info->num_muic_irqs; i++)
461 if (irq == info->muic_irqs[i].virq)
462 irq_type = info->muic_irqs[i].irq;
465 case RT8973A_INT1_ATTACH:
466 info->irq_attach = true;
468 case RT8973A_INT1_DETACH:
469 info->irq_detach = true;
471 case RT8973A_INT1_OVP:
472 info->irq_ovp = true;
474 case RT8973A_INT1_OTP:
475 info->irq_otp = true;
477 case RT8973A_INT1_CHGDET:
478 case RT8973A_INT1_DCD_T:
479 case RT8973A_INT1_CONNECT:
480 case RT8973A_INT1_ADC_CHG:
481 case RT8973A_INT2_UVLO:
482 case RT8973A_INT2_POR:
483 case RT8973A_INT2_OTP_FET:
484 case RT8973A_INT2_OVP_FET:
485 case RT8973A_INT2_OCP_LATCH:
486 case RT8973A_INT2_OCP:
487 case RT8973A_INT2_OVP_OCP:
490 "Cannot handle this interrupt (%d)\n", irq_type);
494 schedule_work(&info->irq_work);
499 static void rt8973a_muic_detect_cable_wq(struct work_struct *work)
501 struct rt8973a_muic_info *info = container_of(to_delayed_work(work),
502 struct rt8973a_muic_info, wq_detcable);
505 /* Notify the state of connector cable or not */
506 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
508 dev_warn(info->dev, "failed to detect cable state\n");
511 static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)
513 unsigned int data, vendor_id, version_id;
516 /* To test I2C, Print version_id and vendor_id of RT8973A */
517 ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data);
520 "failed to read DEVICE_ID register: %d\n", ret);
524 vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >>
525 RT8973A_REG_DEVICE_ID_VENDOR_SHIFT);
526 version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >>
527 RT8973A_REG_DEVICE_ID_VERSION_SHIFT);
529 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
530 version_id, vendor_id);
532 /* Initiazle the register of RT8973A device to bring-up */
533 for (i = 0; i < info->num_reg_data; i++) {
534 u8 reg = info->reg_data[i].reg;
535 u8 mask = info->reg_data[i].mask;
538 if (info->reg_data[i].invert)
539 val = ~info->reg_data[i].val;
541 val = info->reg_data[i].val;
543 regmap_update_bits(info->regmap, reg, mask, val);
546 /* Check whether RT8973A is auto swithcing mode or not */
547 ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data);
550 "failed to read CONTROL1 register: %d\n", ret);
554 data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK;
556 info->auto_config = true;
558 "Enable Auto-configuration for internal path\n");
562 static int rt8973a_muic_i2c_probe(struct i2c_client *i2c,
563 const struct i2c_device_id *id)
565 struct device_node *np = i2c->dev.of_node;
566 struct rt8973a_muic_info *info;
567 int i, ret, irq_flags;
572 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
575 i2c_set_clientdata(i2c, info);
577 info->dev = &i2c->dev;
579 info->irq = i2c->irq;
580 info->muic_irqs = rt8973a_muic_irqs;
581 info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs);
582 info->reg_data = rt8973a_reg_data;
583 info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data);
585 mutex_init(&info->mutex);
587 INIT_WORK(&info->irq_work, rt8973a_muic_irq_work);
589 info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config);
590 if (IS_ERR(info->regmap)) {
591 ret = PTR_ERR(info->regmap);
592 dev_err(info->dev, "failed to allocate register map: %d\n",
597 /* Support irq domain for RT8973A MUIC device */
598 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
599 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
600 &rt8973a_muic_irq_chip, &info->irq_data);
602 dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n",
607 for (i = 0; i < info->num_muic_irqs; i++) {
608 struct muic_irq *muic_irq = &info->muic_irqs[i];
609 unsigned int virq = 0;
611 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
614 muic_irq->virq = virq;
616 ret = devm_request_threaded_irq(info->dev, virq, NULL,
617 rt8973a_muic_irq_handler,
619 muic_irq->name, info);
622 "failed: irq request (IRQ: %d, error :%d)\n",
628 /* Allocate extcon device */
629 info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable);
630 if (IS_ERR(info->edev)) {
631 dev_err(info->dev, "failed to allocate memory for extcon\n");
634 info->edev->name = np->name;
636 /* Register extcon device */
637 ret = devm_extcon_dev_register(info->dev, info->edev);
639 dev_err(info->dev, "failed to register extcon device\n");
644 * Detect accessory after completing the initialization of platform
646 * - Use delayed workqueue to detect cable state and then
647 * notify cable state to notifiee/platform through uevent.
648 * After completing the booting of platform, the extcon provider
649 * driver should notify cable state to upper layer.
651 INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq);
652 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
653 msecs_to_jiffies(DELAY_MS_DEFAULT));
655 /* Initialize RT8973A device and print vendor id and version id */
656 rt8973a_init_dev_type(info);
661 static int rt8973a_muic_i2c_remove(struct i2c_client *i2c)
663 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
665 regmap_del_irq_chip(info->irq, info->irq_data);
670 static const struct of_device_id rt8973a_dt_match[] = {
671 { .compatible = "richtek,rt8973a-muic" },
675 #ifdef CONFIG_PM_SLEEP
676 static int rt8973a_muic_suspend(struct device *dev)
678 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
679 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
681 enable_irq_wake(info->irq);
686 static int rt8973a_muic_resume(struct device *dev)
688 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
689 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
691 disable_irq_wake(info->irq);
697 static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops,
698 rt8973a_muic_suspend, rt8973a_muic_resume);
700 static const struct i2c_device_id rt8973a_i2c_id[] = {
701 { "rt8973a", TYPE_RT8973A },
704 MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id);
706 static struct i2c_driver rt8973a_muic_i2c_driver = {
709 .owner = THIS_MODULE,
710 .pm = &rt8973a_muic_pm_ops,
711 .of_match_table = rt8973a_dt_match,
713 .probe = rt8973a_muic_i2c_probe,
714 .remove = rt8973a_muic_i2c_remove,
715 .id_table = rt8973a_i2c_id,
718 static int __init rt8973a_muic_i2c_init(void)
720 return i2c_add_driver(&rt8973a_muic_i2c_driver);
722 subsys_initcall(rt8973a_muic_i2c_init);
724 MODULE_DESCRIPTION("Richtek RT8973A Extcon driver");
725 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
726 MODULE_LICENSE("GPL");