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11#include <linux/module.h>
12#include <linux/err.h>
13#include <linux/platform_device.h>
14#include <linux/power_supply.h>
15#include <linux/slab.h>
16#include <linux/usb/phy.h>
17
18#include <linux/mfd/wm831x/core.h>
19#include <linux/mfd/wm831x/auxadc.h>
20#include <linux/mfd/wm831x/pmu.h>
21#include <linux/mfd/wm831x/pdata.h>
22
23struct wm831x_power {
24 struct wm831x *wm831x;
25 struct power_supply *wall;
26 struct power_supply *usb;
27 struct power_supply *battery;
28 struct power_supply_desc wall_desc;
29 struct power_supply_desc usb_desc;
30 struct power_supply_desc battery_desc;
31 char wall_name[20];
32 char usb_name[20];
33 char battery_name[20];
34 bool have_battery;
35 struct usb_phy *usb_phy;
36 struct notifier_block usb_notify;
37};
38
39static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
40 union power_supply_propval *val)
41{
42 int ret;
43
44 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
45 if (ret < 0)
46 return ret;
47
48 if (ret & supply)
49 val->intval = 1;
50 else
51 val->intval = 0;
52
53 return 0;
54}
55
56static int wm831x_power_read_voltage(struct wm831x *wm831x,
57 enum wm831x_auxadc src,
58 union power_supply_propval *val)
59{
60 int ret;
61
62 ret = wm831x_auxadc_read_uv(wm831x, src);
63 if (ret >= 0)
64 val->intval = ret;
65
66 return ret;
67}
68
69
70
71
72static int wm831x_wall_get_prop(struct power_supply *psy,
73 enum power_supply_property psp,
74 union power_supply_propval *val)
75{
76 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent);
77 struct wm831x *wm831x = wm831x_power->wm831x;
78 int ret = 0;
79
80 switch (psp) {
81 case POWER_SUPPLY_PROP_ONLINE:
82 ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val);
83 break;
84 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
85 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val);
86 break;
87 default:
88 ret = -EINVAL;
89 break;
90 }
91
92 return ret;
93}
94
95static enum power_supply_property wm831x_wall_props[] = {
96 POWER_SUPPLY_PROP_ONLINE,
97 POWER_SUPPLY_PROP_VOLTAGE_NOW,
98};
99
100
101
102
103static int wm831x_usb_get_prop(struct power_supply *psy,
104 enum power_supply_property psp,
105 union power_supply_propval *val)
106{
107 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent);
108 struct wm831x *wm831x = wm831x_power->wm831x;
109 int ret = 0;
110
111 switch (psp) {
112 case POWER_SUPPLY_PROP_ONLINE:
113 ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val);
114 break;
115 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
116 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val);
117 break;
118 default:
119 ret = -EINVAL;
120 break;
121 }
122
123 return ret;
124}
125
126static enum power_supply_property wm831x_usb_props[] = {
127 POWER_SUPPLY_PROP_ONLINE,
128 POWER_SUPPLY_PROP_VOLTAGE_NOW,
129};
130
131
132static const unsigned int wm831x_usb_limits[] = {
133 0,
134 2,
135 100,
136 500,
137 900,
138 1500,
139 1800,
140 550,
141};
142
143static int wm831x_usb_limit_change(struct notifier_block *nb,
144 unsigned long limit, void *data)
145{
146 struct wm831x_power *wm831x_power = container_of(nb,
147 struct wm831x_power,
148 usb_notify);
149 unsigned int i, best;
150
151
152 best = 0;
153 for (i = 0; i < ARRAY_SIZE(wm831x_usb_limits); i++) {
154 if (limit >= wm831x_usb_limits[i] &&
155 wm831x_usb_limits[best] < wm831x_usb_limits[i])
156 best = i;
157 }
158
159 dev_dbg(wm831x_power->wm831x->dev,
160 "Limiting USB current to %umA", wm831x_usb_limits[best]);
161
162 wm831x_set_bits(wm831x_power->wm831x, WM831X_POWER_STATE,
163 WM831X_USB_ILIM_MASK, best);
164
165 return 0;
166}
167
168
169
170
171
172struct chg_map {
173 int val;
174 int reg_val;
175};
176
177static struct chg_map trickle_ilims[] = {
178 { 50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT },
179 { 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT },
180 { 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT },
181 { 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT },
182};
183
184static struct chg_map vsels[] = {
185 { 4050, 0 << WM831X_CHG_VSEL_SHIFT },
186 { 4100, 1 << WM831X_CHG_VSEL_SHIFT },
187 { 4150, 2 << WM831X_CHG_VSEL_SHIFT },
188 { 4200, 3 << WM831X_CHG_VSEL_SHIFT },
189};
190
191static struct chg_map fast_ilims[] = {
192 { 0, 0 << WM831X_CHG_FAST_ILIM_SHIFT },
193 { 50, 1 << WM831X_CHG_FAST_ILIM_SHIFT },
194 { 100, 2 << WM831X_CHG_FAST_ILIM_SHIFT },
195 { 150, 3 << WM831X_CHG_FAST_ILIM_SHIFT },
196 { 200, 4 << WM831X_CHG_FAST_ILIM_SHIFT },
197 { 250, 5 << WM831X_CHG_FAST_ILIM_SHIFT },
198 { 300, 6 << WM831X_CHG_FAST_ILIM_SHIFT },
199 { 350, 7 << WM831X_CHG_FAST_ILIM_SHIFT },
200 { 400, 8 << WM831X_CHG_FAST_ILIM_SHIFT },
201 { 450, 9 << WM831X_CHG_FAST_ILIM_SHIFT },
202 { 500, 10 << WM831X_CHG_FAST_ILIM_SHIFT },
203 { 600, 11 << WM831X_CHG_FAST_ILIM_SHIFT },
204 { 700, 12 << WM831X_CHG_FAST_ILIM_SHIFT },
205 { 800, 13 << WM831X_CHG_FAST_ILIM_SHIFT },
206 { 900, 14 << WM831X_CHG_FAST_ILIM_SHIFT },
207 { 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT },
208};
209
210static struct chg_map eoc_iterms[] = {
211 { 20, 0 << WM831X_CHG_ITERM_SHIFT },
212 { 30, 1 << WM831X_CHG_ITERM_SHIFT },
213 { 40, 2 << WM831X_CHG_ITERM_SHIFT },
214 { 50, 3 << WM831X_CHG_ITERM_SHIFT },
215 { 60, 4 << WM831X_CHG_ITERM_SHIFT },
216 { 70, 5 << WM831X_CHG_ITERM_SHIFT },
217 { 80, 6 << WM831X_CHG_ITERM_SHIFT },
218 { 90, 7 << WM831X_CHG_ITERM_SHIFT },
219};
220
221static struct chg_map chg_times[] = {
222 { 60, 0 << WM831X_CHG_TIME_SHIFT },
223 { 90, 1 << WM831X_CHG_TIME_SHIFT },
224 { 120, 2 << WM831X_CHG_TIME_SHIFT },
225 { 150, 3 << WM831X_CHG_TIME_SHIFT },
226 { 180, 4 << WM831X_CHG_TIME_SHIFT },
227 { 210, 5 << WM831X_CHG_TIME_SHIFT },
228 { 240, 6 << WM831X_CHG_TIME_SHIFT },
229 { 270, 7 << WM831X_CHG_TIME_SHIFT },
230 { 300, 8 << WM831X_CHG_TIME_SHIFT },
231 { 330, 9 << WM831X_CHG_TIME_SHIFT },
232 { 360, 10 << WM831X_CHG_TIME_SHIFT },
233 { 390, 11 << WM831X_CHG_TIME_SHIFT },
234 { 420, 12 << WM831X_CHG_TIME_SHIFT },
235 { 450, 13 << WM831X_CHG_TIME_SHIFT },
236 { 480, 14 << WM831X_CHG_TIME_SHIFT },
237 { 510, 15 << WM831X_CHG_TIME_SHIFT },
238};
239
240static void wm831x_battey_apply_config(struct wm831x *wm831x,
241 struct chg_map *map, int count, int val,
242 int *reg, const char *name,
243 const char *units)
244{
245 int i;
246
247 for (i = 0; i < count; i++)
248 if (val == map[i].val)
249 break;
250 if (i == count) {
251 dev_err(wm831x->dev, "Invalid %s %d%s\n",
252 name, val, units);
253 } else {
254 *reg |= map[i].reg_val;
255 dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
256 }
257}
258
259static void wm831x_config_battery(struct wm831x *wm831x)
260{
261 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
262 struct wm831x_battery_pdata *pdata;
263 int ret, reg1, reg2;
264
265 if (!wm831x_pdata || !wm831x_pdata->battery) {
266 dev_warn(wm831x->dev,
267 "No battery charger configuration\n");
268 return;
269 }
270
271 pdata = wm831x_pdata->battery;
272
273 reg1 = 0;
274 reg2 = 0;
275
276 if (!pdata->enable) {
277 dev_info(wm831x->dev, "Battery charger disabled\n");
278 return;
279 }
280
281 reg1 |= WM831X_CHG_ENA;
282 if (pdata->off_mask)
283 reg2 |= WM831X_CHG_OFF_MSK;
284 if (pdata->fast_enable)
285 reg1 |= WM831X_CHG_FAST;
286
287 wm831x_battey_apply_config(wm831x, trickle_ilims,
288 ARRAY_SIZE(trickle_ilims),
289 pdata->trickle_ilim, ®2,
290 "trickle charge current limit", "mA");
291
292 wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
293 pdata->vsel, ®2,
294 "target voltage", "mV");
295
296 wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
297 pdata->fast_ilim, ®2,
298 "fast charge current limit", "mA");
299
300 wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
301 pdata->eoc_iterm, ®1,
302 "end of charge current threshold", "mA");
303
304 wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
305 pdata->timeout, ®2,
306 "charger timeout", "min");
307
308 ret = wm831x_reg_unlock(wm831x);
309 if (ret != 0) {
310 dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
311 return;
312 }
313
314 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
315 WM831X_CHG_ENA_MASK |
316 WM831X_CHG_FAST_MASK |
317 WM831X_CHG_ITERM_MASK,
318 reg1);
319 if (ret != 0)
320 dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
321 ret);
322
323 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
324 WM831X_CHG_OFF_MSK |
325 WM831X_CHG_TIME_MASK |
326 WM831X_CHG_FAST_ILIM_MASK |
327 WM831X_CHG_TRKL_ILIM_MASK |
328 WM831X_CHG_VSEL_MASK,
329 reg2);
330 if (ret != 0)
331 dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
332 ret);
333
334 wm831x_reg_lock(wm831x);
335}
336
337static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
338{
339 int ret;
340
341 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
342 if (ret < 0)
343 return ret;
344
345 if (ret & WM831X_PWR_SRC_BATT) {
346 *status = POWER_SUPPLY_STATUS_DISCHARGING;
347 return 0;
348 }
349
350 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
351 if (ret < 0)
352 return ret;
353
354 switch (ret & WM831X_CHG_STATE_MASK) {
355 case WM831X_CHG_STATE_OFF:
356 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
357 break;
358 case WM831X_CHG_STATE_TRICKLE:
359 case WM831X_CHG_STATE_FAST:
360 *status = POWER_SUPPLY_STATUS_CHARGING;
361 break;
362
363 default:
364 *status = POWER_SUPPLY_STATUS_UNKNOWN;
365 break;
366 }
367
368 return 0;
369}
370
371static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
372{
373 int ret;
374
375 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
376 if (ret < 0)
377 return ret;
378
379 switch (ret & WM831X_CHG_STATE_MASK) {
380 case WM831X_CHG_STATE_TRICKLE:
381 case WM831X_CHG_STATE_TRICKLE_OT:
382 *type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
383 break;
384 case WM831X_CHG_STATE_FAST:
385 case WM831X_CHG_STATE_FAST_OT:
386 *type = POWER_SUPPLY_CHARGE_TYPE_FAST;
387 break;
388 default:
389 *type = POWER_SUPPLY_CHARGE_TYPE_NONE;
390 break;
391 }
392
393 return 0;
394}
395
396static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
397{
398 int ret;
399
400 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
401 if (ret < 0)
402 return ret;
403
404 if (ret & WM831X_BATT_HOT_STS) {
405 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
406 return 0;
407 }
408
409 if (ret & WM831X_BATT_COLD_STS) {
410 *health = POWER_SUPPLY_HEALTH_COLD;
411 return 0;
412 }
413
414 if (ret & WM831X_BATT_OV_STS) {
415 *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
416 return 0;
417 }
418
419 switch (ret & WM831X_CHG_STATE_MASK) {
420 case WM831X_CHG_STATE_TRICKLE_OT:
421 case WM831X_CHG_STATE_FAST_OT:
422 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
423 break;
424 case WM831X_CHG_STATE_DEFECTIVE:
425 *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
426 break;
427 default:
428 *health = POWER_SUPPLY_HEALTH_GOOD;
429 break;
430 }
431
432 return 0;
433}
434
435static int wm831x_bat_get_prop(struct power_supply *psy,
436 enum power_supply_property psp,
437 union power_supply_propval *val)
438{
439 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent);
440 struct wm831x *wm831x = wm831x_power->wm831x;
441 int ret = 0;
442
443 switch (psp) {
444 case POWER_SUPPLY_PROP_STATUS:
445 ret = wm831x_bat_check_status(wm831x, &val->intval);
446 break;
447 case POWER_SUPPLY_PROP_ONLINE:
448 ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT,
449 val);
450 break;
451 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
452 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
453 break;
454 case POWER_SUPPLY_PROP_HEALTH:
455 ret = wm831x_bat_check_health(wm831x, &val->intval);
456 break;
457 case POWER_SUPPLY_PROP_CHARGE_TYPE:
458 ret = wm831x_bat_check_type(wm831x, &val->intval);
459 break;
460 default:
461 ret = -EINVAL;
462 break;
463 }
464
465 return ret;
466}
467
468static enum power_supply_property wm831x_bat_props[] = {
469 POWER_SUPPLY_PROP_STATUS,
470 POWER_SUPPLY_PROP_ONLINE,
471 POWER_SUPPLY_PROP_VOLTAGE_NOW,
472 POWER_SUPPLY_PROP_HEALTH,
473 POWER_SUPPLY_PROP_CHARGE_TYPE,
474};
475
476static const char *wm831x_bat_irqs[] = {
477 "BATT HOT",
478 "BATT COLD",
479 "BATT FAIL",
480 "OV",
481 "END",
482 "TO",
483 "MODE",
484 "START",
485};
486
487static irqreturn_t wm831x_bat_irq(int irq, void *data)
488{
489 struct wm831x_power *wm831x_power = data;
490 struct wm831x *wm831x = wm831x_power->wm831x;
491
492 dev_dbg(wm831x->dev, "Battery status changed: %d\n", irq);
493
494
495
496 if (wm831x_power->have_battery)
497 power_supply_changed(wm831x_power->battery);
498
499 return IRQ_HANDLED;
500}
501
502
503
504
505
506
507static irqreturn_t wm831x_syslo_irq(int irq, void *data)
508{
509 struct wm831x_power *wm831x_power = data;
510 struct wm831x *wm831x = wm831x_power->wm831x;
511
512
513
514 dev_crit(wm831x->dev, "SYSVDD under voltage\n");
515
516 return IRQ_HANDLED;
517}
518
519static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
520{
521 struct wm831x_power *wm831x_power = data;
522 struct wm831x *wm831x = wm831x_power->wm831x;
523
524 dev_dbg(wm831x->dev, "Power source changed\n");
525
526
527 if (wm831x_power->have_battery)
528 power_supply_changed(wm831x_power->battery);
529 power_supply_changed(wm831x_power->usb);
530 power_supply_changed(wm831x_power->wall);
531
532 return IRQ_HANDLED;
533}
534
535static int wm831x_power_probe(struct platform_device *pdev)
536{
537 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
538 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
539 struct wm831x_power *power;
540 int ret, irq, i;
541
542 power = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_power),
543 GFP_KERNEL);
544 if (power == NULL)
545 return -ENOMEM;
546
547 power->wm831x = wm831x;
548 platform_set_drvdata(pdev, power);
549
550 if (wm831x_pdata && wm831x_pdata->wm831x_num) {
551 snprintf(power->wall_name, sizeof(power->wall_name),
552 "wm831x-wall.%d", wm831x_pdata->wm831x_num);
553 snprintf(power->battery_name, sizeof(power->wall_name),
554 "wm831x-battery.%d", wm831x_pdata->wm831x_num);
555 snprintf(power->usb_name, sizeof(power->wall_name),
556 "wm831x-usb.%d", wm831x_pdata->wm831x_num);
557 } else {
558 snprintf(power->wall_name, sizeof(power->wall_name),
559 "wm831x-wall");
560 snprintf(power->battery_name, sizeof(power->wall_name),
561 "wm831x-battery");
562 snprintf(power->usb_name, sizeof(power->wall_name),
563 "wm831x-usb");
564 }
565
566
567
568
569 wm831x_config_battery(wm831x);
570
571 power->wall_desc.name = power->wall_name;
572 power->wall_desc.type = POWER_SUPPLY_TYPE_MAINS;
573 power->wall_desc.properties = wm831x_wall_props;
574 power->wall_desc.num_properties = ARRAY_SIZE(wm831x_wall_props);
575 power->wall_desc.get_property = wm831x_wall_get_prop;
576 power->wall = power_supply_register(&pdev->dev, &power->wall_desc,
577 NULL);
578 if (IS_ERR(power->wall)) {
579 ret = PTR_ERR(power->wall);
580 goto err;
581 }
582
583 power->usb_desc.name = power->usb_name,
584 power->usb_desc.type = POWER_SUPPLY_TYPE_USB;
585 power->usb_desc.properties = wm831x_usb_props;
586 power->usb_desc.num_properties = ARRAY_SIZE(wm831x_usb_props);
587 power->usb_desc.get_property = wm831x_usb_get_prop;
588 power->usb = power_supply_register(&pdev->dev, &power->usb_desc, NULL);
589 if (IS_ERR(power->usb)) {
590 ret = PTR_ERR(power->usb);
591 goto err_wall;
592 }
593
594 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1);
595 if (ret < 0)
596 goto err_wall;
597 power->have_battery = ret & WM831X_CHG_ENA;
598
599 if (power->have_battery) {
600 power->battery_desc.name = power->battery_name;
601 power->battery_desc.properties = wm831x_bat_props;
602 power->battery_desc.num_properties = ARRAY_SIZE(wm831x_bat_props);
603 power->battery_desc.get_property = wm831x_bat_get_prop;
604 power->battery_desc.use_for_apm = 1;
605 power->battery = power_supply_register(&pdev->dev,
606 &power->battery_desc,
607 NULL);
608 if (IS_ERR(power->battery)) {
609 ret = PTR_ERR(power->battery);
610 goto err_usb;
611 }
612 }
613
614 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO"));
615 ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
616 IRQF_TRIGGER_RISING | IRQF_ONESHOT, "System power low",
617 power);
618 if (ret != 0) {
619 dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
620 irq, ret);
621 goto err_battery;
622 }
623
624 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC"));
625 ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq,
626 IRQF_TRIGGER_RISING | IRQF_ONESHOT, "Power source",
627 power);
628 if (ret != 0) {
629 dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
630 irq, ret);
631 goto err_syslo;
632 }
633
634 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
635 irq = wm831x_irq(wm831x,
636 platform_get_irq_byname(pdev,
637 wm831x_bat_irqs[i]));
638 ret = request_threaded_irq(irq, NULL, wm831x_bat_irq,
639 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
640 wm831x_bat_irqs[i],
641 power);
642 if (ret != 0) {
643 dev_err(&pdev->dev,
644 "Failed to request %s IRQ %d: %d\n",
645 wm831x_bat_irqs[i], irq, ret);
646 goto err_bat_irq;
647 }
648 }
649
650 power->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "phys", 0);
651 ret = PTR_ERR_OR_ZERO(power->usb_phy);
652
653 switch (ret) {
654 case 0:
655 power->usb_notify.notifier_call = wm831x_usb_limit_change;
656 ret = usb_register_notifier(power->usb_phy, &power->usb_notify);
657 if (ret) {
658 dev_err(&pdev->dev, "Failed to register notifier: %d\n",
659 ret);
660 goto err_bat_irq;
661 }
662 break;
663 case -EINVAL:
664 case -ENODEV:
665
666 power->usb_phy = NULL;
667 ret = 0;
668 break;
669 default:
670 dev_err(&pdev->dev, "Failed to find USB phy: %d\n", ret);
671
672 case -EPROBE_DEFER:
673 goto err_bat_irq;
674 break;
675 }
676
677 return ret;
678
679err_bat_irq:
680 --i;
681 for (; i >= 0; i--) {
682 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
683 free_irq(irq, power);
684 }
685 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC"));
686 free_irq(irq, power);
687err_syslo:
688 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO"));
689 free_irq(irq, power);
690err_battery:
691 if (power->have_battery)
692 power_supply_unregister(power->battery);
693err_usb:
694 power_supply_unregister(power->usb);
695err_wall:
696 power_supply_unregister(power->wall);
697err:
698 return ret;
699}
700
701static int wm831x_power_remove(struct platform_device *pdev)
702{
703 struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
704 struct wm831x *wm831x = wm831x_power->wm831x;
705 int irq, i;
706
707 if (wm831x_power->usb_phy) {
708 usb_unregister_notifier(wm831x_power->usb_phy,
709 &wm831x_power->usb_notify);
710 }
711
712 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
713 irq = wm831x_irq(wm831x,
714 platform_get_irq_byname(pdev,
715 wm831x_bat_irqs[i]));
716 free_irq(irq, wm831x_power);
717 }
718
719 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC"));
720 free_irq(irq, wm831x_power);
721
722 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO"));
723 free_irq(irq, wm831x_power);
724
725 if (wm831x_power->have_battery)
726 power_supply_unregister(wm831x_power->battery);
727 power_supply_unregister(wm831x_power->wall);
728 power_supply_unregister(wm831x_power->usb);
729 return 0;
730}
731
732static struct platform_driver wm831x_power_driver = {
733 .probe = wm831x_power_probe,
734 .remove = wm831x_power_remove,
735 .driver = {
736 .name = "wm831x-power",
737 },
738};
739
740module_platform_driver(wm831x_power_driver);
741
742MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
743MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
744MODULE_LICENSE("GPL");
745MODULE_ALIAS("platform:wm831x-power");
746
