This source file includes following definitions.
- cpcap_charger_battery_found
- cpcap_charger_get_charge_voltage
- cpcap_charger_get_charge_current
- cpcap_charger_get_property
- cpcap_charger_set_cable_path
- cpcap_charger_set_inductive_path
- cpcap_charger_set_state
- cpcap_charger_vbus_valid
- cpcap_charger_vbus_work
- cpcap_charger_set_vbus
- cpcap_charger_get_ints_state
- cpcap_usb_detect
- cpcap_charger_irq_thread
- cpcap_usb_init_irq
- cpcap_usb_init_interrupts
- cpcap_charger_init_optional_gpios
- cpcap_charger_init_iio
- cpcap_charger_probe
- cpcap_charger_remove
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13 #include <linux/atomic.h>
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/err.h>
18 #include <linux/interrupt.h>
19 #include <linux/notifier.h>
20 #include <linux/of.h>
21 #include <linux/of_platform.h>
22 #include <linux/platform_device.h>
23 #include <linux/power_supply.h>
24 #include <linux/regmap.h>
25
26 #include <linux/gpio/consumer.h>
27 #include <linux/usb/phy_companion.h>
28 #include <linux/phy/omap_usb.h>
29 #include <linux/usb/otg.h>
30 #include <linux/iio/consumer.h>
31 #include <linux/mfd/motorola-cpcap.h>
32
33
34
35
36
37
38
39
40
41 #define CPCAP_REG_CRM_UNUSED_641_15 BIT(15)
42 #define CPCAP_REG_CRM_UNUSED_641_14 BIT(14)
43 #define CPCAP_REG_CRM_CHRG_LED_EN BIT(13)
44 #define CPCAP_REG_CRM_RVRSMODE BIT(12)
45 #define CPCAP_REG_CRM_ICHRG_TR1 BIT(11)
46 #define CPCAP_REG_CRM_ICHRG_TR0 BIT(10)
47 #define CPCAP_REG_CRM_FET_OVRD BIT(9)
48 #define CPCAP_REG_CRM_FET_CTRL BIT(8)
49 #define CPCAP_REG_CRM_VCHRG3 BIT(7)
50 #define CPCAP_REG_CRM_VCHRG2 BIT(6)
51 #define CPCAP_REG_CRM_VCHRG1 BIT(5)
52 #define CPCAP_REG_CRM_VCHRG0 BIT(4)
53 #define CPCAP_REG_CRM_ICHRG3 BIT(3)
54 #define CPCAP_REG_CRM_ICHRG2 BIT(2)
55 #define CPCAP_REG_CRM_ICHRG1 BIT(1)
56 #define CPCAP_REG_CRM_ICHRG0 BIT(0)
57
58
59 #define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10)
60 #define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0)
61 #define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1)
62 #define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2)
63 #define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4)
64
65
66
67
68
69
70 #define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4)
71 #define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0)
72 #define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1)
73 #define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2)
74 #define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3)
75 #define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4)
76 #define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5)
77 #define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6)
78 #define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7)
79 #define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8)
80 #define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9)
81 #define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa)
82 #define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb)
83 #define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc)
84 #define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd)
85 #define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe)
86 #define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf)
87
88
89
90
91
92
93 #define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0)
94 #define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0)
95 #define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1)
96 #define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2)
97 #define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3)
98 #define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4)
99 #define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5)
100 #define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6)
101 #define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7)
102 #define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8)
103 #define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9)
104 #define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa)
105 #define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb)
106 #define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc)
107 #define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd)
108 #define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe)
109 #define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf)
110
111
112 #define CPCAP_BIT_VBUS_SWITCH BIT(0)
113
114 enum {
115 CPCAP_CHARGER_IIO_BATTDET,
116 CPCAP_CHARGER_IIO_VOLTAGE,
117 CPCAP_CHARGER_IIO_VBUS,
118 CPCAP_CHARGER_IIO_CHRG_CURRENT,
119 CPCAP_CHARGER_IIO_BATT_CURRENT,
120 CPCAP_CHARGER_IIO_NR,
121 };
122
123 struct cpcap_charger_ddata {
124 struct device *dev;
125 struct regmap *reg;
126 struct list_head irq_list;
127 struct delayed_work detect_work;
128 struct delayed_work vbus_work;
129 struct gpio_desc *gpio[2];
130
131 struct iio_channel *channels[CPCAP_CHARGER_IIO_NR];
132
133 struct power_supply *usb;
134
135 struct phy_companion comparator;
136 unsigned int vbus_enabled:1;
137 unsigned int feeding_vbus:1;
138 atomic_t active;
139
140 int status;
141 };
142
143 struct cpcap_interrupt_desc {
144 int irq;
145 struct list_head node;
146 const char *name;
147 };
148
149 struct cpcap_charger_ints_state {
150 bool chrg_det;
151 bool rvrs_chrg;
152 bool vbusov;
153
154 bool chrg_se1b;
155 bool rvrs_mode;
156 bool chrgcurr1;
157 bool vbusvld;
158
159 bool battdetb;
160 };
161
162 static enum power_supply_property cpcap_charger_props[] = {
163 POWER_SUPPLY_PROP_STATUS,
164 POWER_SUPPLY_PROP_ONLINE,
165 POWER_SUPPLY_PROP_VOLTAGE_NOW,
166 POWER_SUPPLY_PROP_CURRENT_NOW,
167 };
168
169 static bool cpcap_charger_battery_found(struct cpcap_charger_ddata *ddata)
170 {
171 struct iio_channel *channel;
172 int error, value;
173
174 channel = ddata->channels[CPCAP_CHARGER_IIO_BATTDET];
175 error = iio_read_channel_raw(channel, &value);
176 if (error < 0) {
177 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
178
179 return false;
180 }
181
182 return value == 1;
183 }
184
185 static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata)
186 {
187 struct iio_channel *channel;
188 int error, value = 0;
189
190 channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE];
191 error = iio_read_channel_processed(channel, &value);
192 if (error < 0) {
193 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
194
195 return 0;
196 }
197
198 return value;
199 }
200
201 static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata)
202 {
203 struct iio_channel *channel;
204 int error, value = 0;
205
206 channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT];
207 error = iio_read_channel_processed(channel, &value);
208 if (error < 0) {
209 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
210
211 return 0;
212 }
213
214 return value;
215 }
216
217 static int cpcap_charger_get_property(struct power_supply *psy,
218 enum power_supply_property psp,
219 union power_supply_propval *val)
220 {
221 struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
222
223 switch (psp) {
224 case POWER_SUPPLY_PROP_STATUS:
225 val->intval = ddata->status;
226 break;
227 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
228 if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
229 val->intval = cpcap_charger_get_charge_voltage(ddata) *
230 1000;
231 else
232 val->intval = 0;
233 break;
234 case POWER_SUPPLY_PROP_CURRENT_NOW:
235 if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
236 val->intval = cpcap_charger_get_charge_current(ddata) *
237 1000;
238 else
239 val->intval = 0;
240 break;
241 case POWER_SUPPLY_PROP_ONLINE:
242 val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING;
243 break;
244 default:
245 return -EINVAL;
246 }
247
248 return 0;
249 }
250
251 static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata,
252 bool enabled)
253 {
254 if (!ddata->gpio[0])
255 return;
256
257 gpiod_set_value(ddata->gpio[0], enabled);
258 }
259
260 static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata,
261 bool enabled)
262 {
263 if (!ddata->gpio[1])
264 return;
265
266 gpiod_set_value(ddata->gpio[1], enabled);
267 }
268
269 static int cpcap_charger_set_state(struct cpcap_charger_ddata *ddata,
270 int max_voltage, int charge_current,
271 int trickle_current)
272 {
273 bool enable;
274 int error;
275
276 enable = (charge_current || trickle_current);
277 dev_dbg(ddata->dev, "%s enable: %i\n", __func__, enable);
278
279 if (!enable) {
280 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
281 0x3fff,
282 CPCAP_REG_CRM_FET_OVRD |
283 CPCAP_REG_CRM_FET_CTRL);
284 if (error) {
285 ddata->status = POWER_SUPPLY_STATUS_UNKNOWN;
286 goto out_err;
287 }
288
289 ddata->status = POWER_SUPPLY_STATUS_DISCHARGING;
290
291 return 0;
292 }
293
294 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff,
295 CPCAP_REG_CRM_CHRG_LED_EN |
296 trickle_current |
297 CPCAP_REG_CRM_FET_OVRD |
298 CPCAP_REG_CRM_FET_CTRL |
299 max_voltage |
300 charge_current);
301 if (error) {
302 ddata->status = POWER_SUPPLY_STATUS_UNKNOWN;
303 goto out_err;
304 }
305
306 ddata->status = POWER_SUPPLY_STATUS_CHARGING;
307
308 return 0;
309
310 out_err:
311 dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
312
313 return error;
314 }
315
316 static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata)
317 {
318 int error, value = 0;
319 struct iio_channel *channel =
320 ddata->channels[CPCAP_CHARGER_IIO_VBUS];
321
322 error = iio_read_channel_processed(channel, &value);
323 if (error >= 0)
324 return value > 3900 ? true : false;
325
326 dev_err(ddata->dev, "error reading VBUS: %i\n", error);
327
328 return false;
329 }
330
331
332 static void cpcap_charger_vbus_work(struct work_struct *work)
333 {
334 struct cpcap_charger_ddata *ddata;
335 bool vbus = false;
336 int error;
337
338 ddata = container_of(work, struct cpcap_charger_ddata,
339 vbus_work.work);
340
341 if (ddata->vbus_enabled) {
342 vbus = cpcap_charger_vbus_valid(ddata);
343 if (vbus) {
344 dev_info(ddata->dev, "VBUS already provided\n");
345
346 return;
347 }
348
349 ddata->feeding_vbus = true;
350 cpcap_charger_set_cable_path(ddata, false);
351 cpcap_charger_set_inductive_path(ddata, false);
352
353 error = cpcap_charger_set_state(ddata, 0, 0, 0);
354 if (error)
355 goto out_err;
356
357 error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
358 CPCAP_BIT_VBUS_SWITCH,
359 CPCAP_BIT_VBUS_SWITCH);
360 if (error)
361 goto out_err;
362
363 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
364 CPCAP_REG_CRM_RVRSMODE,
365 CPCAP_REG_CRM_RVRSMODE);
366 if (error)
367 goto out_err;
368 } else {
369 error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
370 CPCAP_BIT_VBUS_SWITCH, 0);
371 if (error)
372 goto out_err;
373
374 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
375 CPCAP_REG_CRM_RVRSMODE, 0);
376 if (error)
377 goto out_err;
378
379 cpcap_charger_set_cable_path(ddata, true);
380 cpcap_charger_set_inductive_path(ddata, true);
381 ddata->feeding_vbus = false;
382 }
383
384 return;
385
386 out_err:
387 dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__,
388 ddata->vbus_enabled ? "enable" : "disable", error);
389 }
390
391 static int cpcap_charger_set_vbus(struct phy_companion *comparator,
392 bool enabled)
393 {
394 struct cpcap_charger_ddata *ddata =
395 container_of(comparator, struct cpcap_charger_ddata,
396 comparator);
397
398 ddata->vbus_enabled = enabled;
399 schedule_delayed_work(&ddata->vbus_work, 0);
400
401 return 0;
402 }
403
404
405
406 static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata,
407 struct cpcap_charger_ints_state *s)
408 {
409 int val, error;
410
411 error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);
412 if (error)
413 return error;
414
415 s->chrg_det = val & BIT(13);
416 s->rvrs_chrg = val & BIT(12);
417 s->vbusov = val & BIT(11);
418
419 error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);
420 if (error)
421 return error;
422
423 s->chrg_se1b = val & BIT(13);
424 s->rvrs_mode = val & BIT(6);
425 s->chrgcurr1 = val & BIT(4);
426 s->vbusvld = val & BIT(3);
427
428 error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);
429 if (error)
430 return error;
431
432 s->battdetb = val & BIT(6);
433
434 return 0;
435 }
436
437 static void cpcap_usb_detect(struct work_struct *work)
438 {
439 struct cpcap_charger_ddata *ddata;
440 struct cpcap_charger_ints_state s;
441 int error;
442
443 ddata = container_of(work, struct cpcap_charger_ddata,
444 detect_work.work);
445
446 error = cpcap_charger_get_ints_state(ddata, &s);
447 if (error)
448 return;
449
450 if (!ddata->feeding_vbus && cpcap_charger_vbus_valid(ddata) &&
451 s.chrgcurr1) {
452 int max_current;
453
454 if (cpcap_charger_battery_found(ddata))
455 max_current = CPCAP_REG_CRM_ICHRG_1A596;
456 else
457 max_current = CPCAP_REG_CRM_ICHRG_0A532;
458
459 error = cpcap_charger_set_state(ddata,
460 CPCAP_REG_CRM_VCHRG_4V35,
461 max_current, 0);
462 if (error)
463 goto out_err;
464 } else {
465 error = cpcap_charger_set_state(ddata, 0, 0, 0);
466 if (error)
467 goto out_err;
468 }
469
470 power_supply_changed(ddata->usb);
471 return;
472
473 out_err:
474 dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
475 }
476
477 static irqreturn_t cpcap_charger_irq_thread(int irq, void *data)
478 {
479 struct cpcap_charger_ddata *ddata = data;
480
481 if (!atomic_read(&ddata->active))
482 return IRQ_NONE;
483
484 schedule_delayed_work(&ddata->detect_work, 0);
485
486 return IRQ_HANDLED;
487 }
488
489 static int cpcap_usb_init_irq(struct platform_device *pdev,
490 struct cpcap_charger_ddata *ddata,
491 const char *name)
492 {
493 struct cpcap_interrupt_desc *d;
494 int irq, error;
495
496 irq = platform_get_irq_byname(pdev, name);
497 if (irq < 0)
498 return -ENODEV;
499
500 error = devm_request_threaded_irq(ddata->dev, irq, NULL,
501 cpcap_charger_irq_thread,
502 IRQF_SHARED,
503 name, ddata);
504 if (error) {
505 dev_err(ddata->dev, "could not get irq %s: %i\n",
506 name, error);
507
508 return error;
509 }
510
511 d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL);
512 if (!d)
513 return -ENOMEM;
514
515 d->name = name;
516 d->irq = irq;
517 list_add(&d->node, &ddata->irq_list);
518
519 return 0;
520 }
521
522 static const char * const cpcap_charger_irqs[] = {
523
524 "chrg_det", "rvrs_chrg",
525
526
527 "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr1", "vbusvld",
528
529
530 "battdetb",
531 };
532
533 static int cpcap_usb_init_interrupts(struct platform_device *pdev,
534 struct cpcap_charger_ddata *ddata)
535 {
536 int i, error;
537
538 for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) {
539 error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]);
540 if (error)
541 return error;
542 }
543
544 return 0;
545 }
546
547 static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata)
548 {
549 int i;
550
551 for (i = 0; i < 2; i++) {
552 ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",
553 i, GPIOD_OUT_HIGH);
554 if (IS_ERR(ddata->gpio[i])) {
555 dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
556 i, PTR_ERR(ddata->gpio[i]));
557 ddata->gpio[i] = NULL;
558 }
559 }
560 }
561
562 static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata)
563 {
564 const char * const names[CPCAP_CHARGER_IIO_NR] = {
565 "battdetb", "battp", "vbus", "chg_isense", "batti",
566 };
567 int error, i;
568
569 for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) {
570 ddata->channels[i] = devm_iio_channel_get(ddata->dev,
571 names[i]);
572 if (IS_ERR(ddata->channels[i])) {
573 error = PTR_ERR(ddata->channels[i]);
574 goto out_err;
575 }
576
577 if (!ddata->channels[i]->indio_dev) {
578 error = -ENXIO;
579 goto out_err;
580 }
581 }
582
583 return 0;
584
585 out_err:
586 if (error != -EPROBE_DEFER)
587 dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
588 error);
589
590 return error;
591 }
592
593 static const struct power_supply_desc cpcap_charger_usb_desc = {
594 .name = "usb",
595 .type = POWER_SUPPLY_TYPE_USB,
596 .properties = cpcap_charger_props,
597 .num_properties = ARRAY_SIZE(cpcap_charger_props),
598 .get_property = cpcap_charger_get_property,
599 };
600
601 #ifdef CONFIG_OF
602 static const struct of_device_id cpcap_charger_id_table[] = {
603 {
604 .compatible = "motorola,mapphone-cpcap-charger",
605 },
606 {},
607 };
608 MODULE_DEVICE_TABLE(of, cpcap_charger_id_table);
609 #endif
610
611 static int cpcap_charger_probe(struct platform_device *pdev)
612 {
613 struct cpcap_charger_ddata *ddata;
614 const struct of_device_id *of_id;
615 struct power_supply_config psy_cfg = {};
616 int error;
617
618 of_id = of_match_device(of_match_ptr(cpcap_charger_id_table),
619 &pdev->dev);
620 if (!of_id)
621 return -EINVAL;
622
623 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
624 if (!ddata)
625 return -ENOMEM;
626
627 ddata->dev = &pdev->dev;
628
629 ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
630 if (!ddata->reg)
631 return -ENODEV;
632
633 INIT_LIST_HEAD(&ddata->irq_list);
634 INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);
635 INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work);
636 platform_set_drvdata(pdev, ddata);
637
638 error = cpcap_charger_init_iio(ddata);
639 if (error)
640 return error;
641
642 atomic_set(&ddata->active, 1);
643
644 psy_cfg.of_node = pdev->dev.of_node;
645 psy_cfg.drv_data = ddata;
646
647 ddata->usb = devm_power_supply_register(ddata->dev,
648 &cpcap_charger_usb_desc,
649 &psy_cfg);
650 if (IS_ERR(ddata->usb)) {
651 error = PTR_ERR(ddata->usb);
652 dev_err(ddata->dev, "failed to register USB charger: %i\n",
653 error);
654
655 return error;
656 }
657
658 error = cpcap_usb_init_interrupts(pdev, ddata);
659 if (error)
660 return error;
661
662 ddata->comparator.set_vbus = cpcap_charger_set_vbus;
663 error = omap_usb2_set_comparator(&ddata->comparator);
664 if (error == -ENODEV) {
665 dev_info(ddata->dev, "charger needs phy, deferring probe\n");
666 return -EPROBE_DEFER;
667 }
668
669 cpcap_charger_init_optional_gpios(ddata);
670
671 schedule_delayed_work(&ddata->detect_work, 0);
672
673 return 0;
674 }
675
676 static int cpcap_charger_remove(struct platform_device *pdev)
677 {
678 struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev);
679 int error;
680
681 atomic_set(&ddata->active, 0);
682 error = omap_usb2_set_comparator(NULL);
683 if (error)
684 dev_warn(ddata->dev, "could not clear USB comparator: %i\n",
685 error);
686
687 error = cpcap_charger_set_state(ddata, 0, 0, 0);
688 if (error)
689 dev_warn(ddata->dev, "could not clear charger: %i\n",
690 error);
691 cancel_delayed_work_sync(&ddata->vbus_work);
692 cancel_delayed_work_sync(&ddata->detect_work);
693
694 return 0;
695 }
696
697 static struct platform_driver cpcap_charger_driver = {
698 .probe = cpcap_charger_probe,
699 .driver = {
700 .name = "cpcap-charger",
701 .of_match_table = of_match_ptr(cpcap_charger_id_table),
702 },
703 .remove = cpcap_charger_remove,
704 };
705 module_platform_driver(cpcap_charger_driver);
706
707 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
708 MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver");
709 MODULE_LICENSE("GPL v2");
710 MODULE_ALIAS("platform:cpcap-charger");