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Donggeun Kim99f09be2011-11-24 18:12:18 +09001/*
Chanwoo Choib76668b2012-05-09 12:31:58 +09002 * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
Donggeun Kim99f09be2011-11-24 18:12:18 +09003 *
Sachin Kamat2ca36f42012-11-20 15:46:33 +09004 * Copyright (C) 2012 Samsung Electronics
Donggeun Kim99f09be2011-11-24 18:12:18 +09005 * Donggeun Kim <dg77.kim@samsung.com>
6 *
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.
11 *
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.
Donggeun Kim99f09be2011-11-24 18:12:18 +090016 */
17
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>
Chanwoo Choib76668b2012-05-09 12:31:58 +090028#include <linux/extcon.h>
Chanwoo Choidca1a712012-07-02 09:03:00 +090029#include <linux/irqdomain.h>
Chanwoo Choib76668b2012-05-09 12:31:58 +090030
31#define DEV_NAME "max8997-muic"
Donggeun Kim99f09be2011-11-24 18:12:18 +090032
33/* MAX8997-MUIC STATUS1 register */
34#define STATUS1_ADC_SHIFT 0
35#define STATUS1_ADCLOW_SHIFT 5
36#define STATUS1_ADCERR_SHIFT 6
37#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
38#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
39#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
40
41/* MAX8997-MUIC STATUS2 register */
42#define STATUS2_CHGTYP_SHIFT 0
43#define STATUS2_CHGDETRUN_SHIFT 3
44#define STATUS2_DCDTMR_SHIFT 4
45#define STATUS2_DBCHG_SHIFT 5
46#define STATUS2_VBVOLT_SHIFT 6
47#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
48#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
49#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
50#define STATUS2_DBCHG_MASK (0x1 << STATUS2_DBCHG_SHIFT)
51#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
52
53/* MAX8997-MUIC STATUS3 register */
54#define STATUS3_OVP_SHIFT 2
55#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
56
57/* MAX8997-MUIC CONTROL1 register */
58#define COMN1SW_SHIFT 0
59#define COMP2SW_SHIFT 3
60#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
61#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
62#define SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
63
64#define MAX8997_SW_USB ((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
65#define MAX8997_SW_AUDIO ((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
66#define MAX8997_SW_UART ((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
67#define MAX8997_SW_OPEN ((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))
68
69#define MAX8997_ADC_GROUND 0x00
70#define MAX8997_ADC_MHL 0x01
71#define MAX8997_ADC_JIG_USB_1 0x18
72#define MAX8997_ADC_JIG_USB_2 0x19
73#define MAX8997_ADC_DESKDOCK 0x1a
74#define MAX8997_ADC_JIG_UART 0x1c
75#define MAX8997_ADC_CARDOCK 0x1d
76#define MAX8997_ADC_OPEN 0x1f
77
78struct max8997_muic_irq {
79 unsigned int irq;
80 const char *name;
Chanwoo Choidca1a712012-07-02 09:03:00 +090081 unsigned int virq;
Donggeun Kim99f09be2011-11-24 18:12:18 +090082};
83
84static struct max8997_muic_irq muic_irqs[] = {
85 { MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
86 { MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
87 { MAX8997_MUICIRQ_ADC, "muic-ADC" },
88 { MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
89 { MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
90 { MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
91 { MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
92 { MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
93 { MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
94};
95
96struct max8997_muic_info {
97 struct device *dev;
Donggeun Kim99f09be2011-11-24 18:12:18 +090098 struct i2c_client *muic;
99 struct max8997_muic_platform_data *muic_pdata;
100
101 int irq;
102 struct work_struct irq_work;
103
104 enum max8997_muic_charger_type pre_charger_type;
105 int pre_adc;
106
107 struct mutex mutex;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900108
109 struct extcon_dev *edev;
110};
111
112const char *max8997_extcon_cable[] = {
113 [0] = "USB",
114 [1] = "USB-Host",
115 [2] = "TA",
116 [3] = "Fast-charger",
117 [4] = "Slow-charger",
118 [5] = "Charge-downstream",
119 [6] = "MHL",
120 [7] = "Dock-desk",
Axel Lin155cb062012-06-16 11:36:08 +0800121 [8] = "Dock-card",
122 [9] = "JIG",
Chanwoo Choib76668b2012-05-09 12:31:58 +0900123
124 NULL,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900125};
126
127static int max8997_muic_handle_usb(struct max8997_muic_info *info,
128 enum max8997_muic_usb_type usb_type, bool attached)
129{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900130 int ret = 0;
131
132 if (usb_type == MAX8997_USB_HOST) {
133 /* switch to USB */
134 ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
135 attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
136 SW_MASK);
137 if (ret) {
138 dev_err(info->dev, "failed to update muic register\n");
139 goto out;
140 }
141 }
142
Chanwoo Choib76668b2012-05-09 12:31:58 +0900143 switch (usb_type) {
144 case MAX8997_USB_HOST:
145 extcon_set_cable_state(info->edev, "USB-Host", attached);
146 break;
147 case MAX8997_USB_DEVICE:
148 extcon_set_cable_state(info->edev, "USB", attached);
149 break;
150 default:
151 ret = -EINVAL;
152 break;
153 }
154
Donggeun Kim99f09be2011-11-24 18:12:18 +0900155out:
156 return ret;
157}
158
Donggeun Kim99f09be2011-11-24 18:12:18 +0900159static int max8997_muic_handle_dock(struct max8997_muic_info *info,
160 int adc, bool attached)
161{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900162 int ret = 0;
163
164 /* switch to AUDIO */
165 ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
166 attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
167 SW_MASK);
168 if (ret) {
169 dev_err(info->dev, "failed to update muic register\n");
170 goto out;
171 }
172
173 switch (adc) {
174 case MAX8997_ADC_DESKDOCK:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900175 extcon_set_cable_state(info->edev, "Dock-desk", attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900176 break;
177 case MAX8997_ADC_CARDOCK:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900178 extcon_set_cable_state(info->edev, "Dock-card", attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900179 break;
180 default:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900181 ret = -EINVAL;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900182 break;
183 }
184out:
185 return ret;
186}
187
188static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
189 bool attached)
190{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900191 int ret = 0;
192
193 /* switch to UART */
194 ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
195 attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
196 SW_MASK);
197 if (ret) {
198 dev_err(info->dev, "failed to update muic register\n");
199 goto out;
200 }
201
Chanwoo Choib76668b2012-05-09 12:31:58 +0900202 extcon_set_cable_state(info->edev, "JIG", attached);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900203out:
204 return ret;
205}
206
207static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
208{
209 int ret = 0;
210
211 switch (info->pre_adc) {
212 case MAX8997_ADC_GROUND:
213 ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
214 break;
215 case MAX8997_ADC_MHL:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900216 extcon_set_cable_state(info->edev, "MHL", false);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900217 break;
218 case MAX8997_ADC_JIG_USB_1:
219 case MAX8997_ADC_JIG_USB_2:
220 ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
221 break;
222 case MAX8997_ADC_DESKDOCK:
223 case MAX8997_ADC_CARDOCK:
224 ret = max8997_muic_handle_dock(info, info->pre_adc, false);
225 break;
226 case MAX8997_ADC_JIG_UART:
227 ret = max8997_muic_handle_jig_uart(info, false);
228 break;
229 default:
230 break;
231 }
232
233 return ret;
234}
235
236static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
237{
238 int ret = 0;
239
240 switch (adc) {
241 case MAX8997_ADC_GROUND:
242 ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
243 break;
244 case MAX8997_ADC_MHL:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900245 extcon_set_cable_state(info->edev, "MHL", true);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900246 break;
247 case MAX8997_ADC_JIG_USB_1:
248 case MAX8997_ADC_JIG_USB_2:
249 ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
250 break;
251 case MAX8997_ADC_DESKDOCK:
252 case MAX8997_ADC_CARDOCK:
253 ret = max8997_muic_handle_dock(info, adc, true);
254 break;
255 case MAX8997_ADC_JIG_UART:
256 ret = max8997_muic_handle_jig_uart(info, true);
257 break;
258 case MAX8997_ADC_OPEN:
259 ret = max8997_muic_handle_adc_detach(info);
260 break;
261 default:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900262 ret = -EINVAL;
263 goto out;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900264 }
265
266 info->pre_adc = adc;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900267out:
268 return ret;
269}
270
271static int max8997_muic_handle_charger_type_detach(
272 struct max8997_muic_info *info)
273{
Chanwoo Choib76668b2012-05-09 12:31:58 +0900274 switch (info->pre_charger_type) {
275 case MAX8997_CHARGER_TYPE_USB:
276 extcon_set_cable_state(info->edev, "USB", false);
277 break;
278 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
279 extcon_set_cable_state(info->edev, "Charge-downstream", false);
280 break;
281 case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
282 extcon_set_cable_state(info->edev, "TA", false);
283 break;
284 case MAX8997_CHARGER_TYPE_500MA:
285 extcon_set_cable_state(info->edev, "Slow-charger", false);
286 break;
287 case MAX8997_CHARGER_TYPE_1A:
288 extcon_set_cable_state(info->edev, "Fast-charger", false);
289 break;
290 default:
Devendra Naga3cafbd42012-08-31 14:00:19 +0530291 return -EINVAL;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900292 break;
293 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900294
Devendra Naga3cafbd42012-08-31 14:00:19 +0530295 return 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900296}
297
298static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
299 enum max8997_muic_charger_type charger_type)
300{
Donggeun Kim99f09be2011-11-24 18:12:18 +0900301 u8 adc;
302 int ret;
303
304 ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
305 if (ret) {
306 dev_err(info->dev, "failed to read muic register\n");
307 goto out;
308 }
309
310 switch (charger_type) {
311 case MAX8997_CHARGER_TYPE_NONE:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900312 ret = max8997_muic_handle_charger_type_detach(info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900313 break;
314 case MAX8997_CHARGER_TYPE_USB:
315 if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
316 max8997_muic_handle_usb(info,
317 MAX8997_USB_DEVICE, true);
318 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900319 break;
320 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900321 extcon_set_cable_state(info->edev, "Charge-downstream", true);
322 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900323 case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900324 extcon_set_cable_state(info->edev, "TA", true);
325 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900326 case MAX8997_CHARGER_TYPE_500MA:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900327 extcon_set_cable_state(info->edev, "Slow-charger", true);
328 break;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900329 case MAX8997_CHARGER_TYPE_1A:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900330 extcon_set_cable_state(info->edev, "Fast-charger", true);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900331 break;
332 default:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900333 ret = -EINVAL;
334 goto out;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900335 }
336
337 info->pre_charger_type = charger_type;
338out:
339 return ret;
340}
341
342static void max8997_muic_irq_work(struct work_struct *work)
343{
344 struct max8997_muic_info *info = container_of(work,
345 struct max8997_muic_info, irq_work);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900346 u8 status[2];
Donggeun Kim71e58782011-12-15 18:20:47 +0900347 u8 adc, chg_type;
Chanwoo Choidca1a712012-07-02 09:03:00 +0900348 int irq_type = 0;
349 int i, ret;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900350
351 mutex_lock(&info->mutex);
352
353 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
Chanwoo Choib76668b2012-05-09 12:31:58 +0900354 2, status);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900355 if (ret) {
356 dev_err(info->dev, "failed to read muic register\n");
357 mutex_unlock(&info->mutex);
358 return;
359 }
360
361 dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
362 status[0], status[1]);
363
Chanwoo Choidca1a712012-07-02 09:03:00 +0900364 for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
365 if (info->irq == muic_irqs[i].virq)
366 irq_type = muic_irqs[i].irq;
367
Donggeun Kim99f09be2011-11-24 18:12:18 +0900368 switch (irq_type) {
Donggeun Kim99f09be2011-11-24 18:12:18 +0900369 case MAX8997_MUICIRQ_ADC:
370 adc = status[0] & STATUS1_ADC_MASK;
371 adc >>= STATUS1_ADC_SHIFT;
372
373 max8997_muic_handle_adc(info, adc);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900374 break;
375 case MAX8997_MUICIRQ_ChgTyp:
376 chg_type = status[1] & STATUS2_CHGTYP_MASK;
377 chg_type >>= STATUS2_CHGTYP_SHIFT;
378
379 max8997_muic_handle_charger_type(info, chg_type);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900380 break;
381 default:
Chanwoo Choib76668b2012-05-09 12:31:58 +0900382 dev_info(info->dev, "misc interrupt: irq %d occurred\n",
383 irq_type);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900384 break;
385 }
386
Donggeun Kim99f09be2011-11-24 18:12:18 +0900387 mutex_unlock(&info->mutex);
388
389 return;
390}
391
392static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
393{
394 struct max8997_muic_info *info = data;
395
396 dev_dbg(info->dev, "irq:%d\n", irq);
397 info->irq = irq;
398
399 schedule_work(&info->irq_work);
400
401 return IRQ_HANDLED;
402}
403
404static void max8997_muic_detect_dev(struct max8997_muic_info *info)
405{
406 int ret;
407 u8 status[2], adc, chg_type;
408
409 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
410 2, status);
411 if (ret) {
412 dev_err(info->dev, "failed to read muic register\n");
413 return;
414 }
415
416 dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
417 status[0], status[1]);
418
419 adc = status[0] & STATUS1_ADC_MASK;
420 adc >>= STATUS1_ADC_SHIFT;
421
422 chg_type = status[1] & STATUS2_CHGTYP_MASK;
423 chg_type >>= STATUS2_CHGTYP_SHIFT;
424
425 max8997_muic_handle_adc(info, adc);
426 max8997_muic_handle_charger_type(info, chg_type);
427}
428
Bill Pemberton44f34fd2012-11-19 13:23:21 -0500429static int max8997_muic_probe(struct platform_device *pdev)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900430{
Chanwoo Choib76668b2012-05-09 12:31:58 +0900431 struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
432 struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900433 struct max8997_muic_info *info;
434 int ret, i;
435
Sachin Kamat0b672e92012-11-20 15:46:47 +0900436 info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
437 GFP_KERNEL);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900438 if (!info) {
439 dev_err(&pdev->dev, "failed to allocate memory\n");
Sachin Kamat0b672e92012-11-20 15:46:47 +0900440 return -ENOMEM;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900441 }
442
Donggeun Kim99f09be2011-11-24 18:12:18 +0900443 info->dev = &pdev->dev;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900444 info->muic = max8997->muic;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900445
446 platform_set_drvdata(pdev, info);
447 mutex_init(&info->mutex);
448
Donggeun Kim99f09be2011-11-24 18:12:18 +0900449 INIT_WORK(&info->irq_work, max8997_muic_irq_work);
450
451 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
452 struct max8997_muic_irq *muic_irq = &muic_irqs[i];
Sachin Kamat68c92742012-11-20 15:46:41 +0900453 unsigned int virq = 0;
Donggeun Kim99f09be2011-11-24 18:12:18 +0900454
Chanwoo Choidca1a712012-07-02 09:03:00 +0900455 virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
Sachin Kamat68c92742012-11-20 15:46:41 +0900456 if (!virq) {
457 ret = -EINVAL;
Chanwoo Choidca1a712012-07-02 09:03:00 +0900458 goto err_irq;
Sachin Kamat68c92742012-11-20 15:46:41 +0900459 }
Chanwoo Choidca1a712012-07-02 09:03:00 +0900460 muic_irq->virq = virq;
461
Sachin Kamat8117cc32012-11-20 15:46:30 +0900462 ret = request_threaded_irq(virq, NULL, max8997_muic_irq_handler,
Chanwoo Choidca1a712012-07-02 09:03:00 +0900463 0, muic_irq->name, info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900464 if (ret) {
465 dev_err(&pdev->dev,
466 "failed: irq request (IRQ: %d,"
467 " error :%d)\n",
468 muic_irq->irq, ret);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900469 goto err_irq;
470 }
471 }
472
Chanwoo Choib76668b2012-05-09 12:31:58 +0900473 /* External connector */
Sachin Kamat0b672e92012-11-20 15:46:47 +0900474 info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
475 GFP_KERNEL);
Chanwoo Choib76668b2012-05-09 12:31:58 +0900476 if (!info->edev) {
477 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
478 ret = -ENOMEM;
479 goto err_irq;
480 }
481 info->edev->name = DEV_NAME;
482 info->edev->supported_cable = max8997_extcon_cable;
483 ret = extcon_dev_register(info->edev, NULL);
484 if (ret) {
485 dev_err(&pdev->dev, "failed to register extcon device\n");
Sachin Kamat0b672e92012-11-20 15:46:47 +0900486 goto err_irq;
Chanwoo Choib76668b2012-05-09 12:31:58 +0900487 }
488
Donggeun Kim99f09be2011-11-24 18:12:18 +0900489 /* Initialize registers according to platform data */
Chanwoo Choib76668b2012-05-09 12:31:58 +0900490 if (pdata->muic_pdata) {
491 struct max8997_muic_platform_data *mdata = info->muic_pdata;
492
493 for (i = 0; i < mdata->num_init_data; i++) {
494 max8997_write_reg(info->muic, mdata->init_data[i].addr,
495 mdata->init_data[i].data);
496 }
497 }
Donggeun Kim99f09be2011-11-24 18:12:18 +0900498
499 /* Initial device detection */
500 max8997_muic_detect_dev(info);
501
502 return ret;
503
504err_irq:
Axel Lin3241d562012-03-26 09:57:08 +0800505 while (--i >= 0)
Chanwoo Choidca1a712012-07-02 09:03:00 +0900506 free_irq(muic_irqs[i].virq, info);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900507 return ret;
508}
509
Bill Pemberton93ed0322012-11-19 13:25:49 -0500510static int max8997_muic_remove(struct platform_device *pdev)
Donggeun Kim99f09be2011-11-24 18:12:18 +0900511{
512 struct max8997_muic_info *info = platform_get_drvdata(pdev);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900513 int i;
514
Donggeun Kim99f09be2011-11-24 18:12:18 +0900515 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
Chanwoo Choidca1a712012-07-02 09:03:00 +0900516 free_irq(muic_irqs[i].virq, info);
Donggeun Kim71e58782011-12-15 18:20:47 +0900517 cancel_work_sync(&info->irq_work);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900518
Chanwoo Choib76668b2012-05-09 12:31:58 +0900519 extcon_dev_unregister(info->edev);
520
Donggeun Kim99f09be2011-11-24 18:12:18 +0900521 return 0;
522}
523
524static struct platform_driver max8997_muic_driver = {
525 .driver = {
Chanwoo Choib76668b2012-05-09 12:31:58 +0900526 .name = DEV_NAME,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900527 .owner = THIS_MODULE,
528 },
529 .probe = max8997_muic_probe,
Bill Pemberton5f7e2222012-11-19 13:20:06 -0500530 .remove = max8997_muic_remove,
Donggeun Kim99f09be2011-11-24 18:12:18 +0900531};
532
Axel Linb00e1262012-01-22 15:33:49 +0800533module_platform_driver(max8997_muic_driver);
Donggeun Kim99f09be2011-11-24 18:12:18 +0900534
Chanwoo Choib76668b2012-05-09 12:31:58 +0900535MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
Donggeun Kim99f09be2011-11-24 18:12:18 +0900536MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
537MODULE_LICENSE("GPL");