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[deliverable/linux.git] / drivers / power / wm831x_power.c
CommitLineData
3961f7c3
MB		 1/*
2 * PMU driver for Wolfson Microelectronics wm831x PMICs
3 *
4 * Copyright 2009 Wolfson Microelectronics PLC.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/module.h>
12#include <linux/err.h>
13#include <linux/platform_device.h>
14#include <linux/power_supply.h>
15
16#include <linux/mfd/wm831x/core.h>
17#include <linux/mfd/wm831x/auxadc.h>
18#include <linux/mfd/wm831x/pmu.h>
19#include <linux/mfd/wm831x/pdata.h>
20
21struct wm831x_power {
22 struct wm831x *wm831x;
23 struct power_supply wall;
24 struct power_supply backup;
25 struct power_supply usb;
26 struct power_supply battery;
27};
28
29static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
30 union power_supply_propval *val)
31{
32 int ret;
33
34 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
35 if (ret < 0)
36 return ret;
37
38 if (ret & supply)
39 val->intval = 1;
40 else
41 val->intval = 0;
42
43 return 0;
44}
45
46static int wm831x_power_read_voltage(struct wm831x *wm831x,
47 enum wm831x_auxadc src,
48 union power_supply_propval *val)
49{
50 int ret;
51
52 ret = wm831x_auxadc_read_uv(wm831x, src);
53 if (ret >= 0)
54 val->intval = ret;
55
56 return ret;
57}
58
59/*********************************************************************
60 * WALL Power
61 *********************************************************************/
62static int wm831x_wall_get_prop(struct power_supply *psy,
63 enum power_supply_property psp,
64 union power_supply_propval *val)
65{
66 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
67 struct wm831x *wm831x = wm831x_power->wm831x;
68 int ret = 0;
69
70 switch (psp) {
71 case POWER_SUPPLY_PROP_ONLINE:
72 ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val);
73 break;
74 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
75 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val);
76 break;
77 default:
78 ret = -EINVAL;
79 break;
80 }
81
82 return ret;
83}
84
85static enum power_supply_property wm831x_wall_props[] = {
86 POWER_SUPPLY_PROP_ONLINE,
87 POWER_SUPPLY_PROP_VOLTAGE_NOW,
88};
89
90/*********************************************************************
91 * USB Power
92 *********************************************************************/
93static int wm831x_usb_get_prop(struct power_supply *psy,
94 enum power_supply_property psp,
95 union power_supply_propval *val)
96{
97 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
98 struct wm831x *wm831x = wm831x_power->wm831x;
99 int ret = 0;
100
101 switch (psp) {
102 case POWER_SUPPLY_PROP_ONLINE:
103 ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val);
104 break;
105 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
106 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val);
107 break;
108 default:
109 ret = -EINVAL;
110 break;
111 }
112
113 return ret;
114}
115
116static enum power_supply_property wm831x_usb_props[] = {
117 POWER_SUPPLY_PROP_ONLINE,
118 POWER_SUPPLY_PROP_VOLTAGE_NOW,
119};
120
121/*********************************************************************
122 * Battery properties
123 *********************************************************************/
124
125struct chg_map {
126 int val;
127 int reg_val;
128};
129
130static struct chg_map trickle_ilims[] = {
131 { 50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT },
132 { 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT },
133 { 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT },
134 { 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT },
135};
136
137static struct chg_map vsels[] = {
138 { 4050, 0 << WM831X_CHG_VSEL_SHIFT },
139 { 4100, 1 << WM831X_CHG_VSEL_SHIFT },
140 { 4150, 2 << WM831X_CHG_VSEL_SHIFT },
141 { 4200, 3 << WM831X_CHG_VSEL_SHIFT },
142};
143
144static struct chg_map fast_ilims[] = {
145 { 0, 0 << WM831X_CHG_FAST_ILIM_SHIFT },
146 { 50, 1 << WM831X_CHG_FAST_ILIM_SHIFT },
147 { 100, 2 << WM831X_CHG_FAST_ILIM_SHIFT },
148 { 150, 3 << WM831X_CHG_FAST_ILIM_SHIFT },
149 { 200, 4 << WM831X_CHG_FAST_ILIM_SHIFT },
150 { 250, 5 << WM831X_CHG_FAST_ILIM_SHIFT },
151 { 300, 6 << WM831X_CHG_FAST_ILIM_SHIFT },
152 { 350, 7 << WM831X_CHG_FAST_ILIM_SHIFT },
153 { 400, 8 << WM831X_CHG_FAST_ILIM_SHIFT },
154 { 450, 9 << WM831X_CHG_FAST_ILIM_SHIFT },
155 { 500, 10 << WM831X_CHG_FAST_ILIM_SHIFT },
156 { 600, 11 << WM831X_CHG_FAST_ILIM_SHIFT },
157 { 700, 12 << WM831X_CHG_FAST_ILIM_SHIFT },
158 { 800, 13 << WM831X_CHG_FAST_ILIM_SHIFT },
159 { 900, 14 << WM831X_CHG_FAST_ILIM_SHIFT },
160 { 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT },
161};
162
163static struct chg_map eoc_iterms[] = {
164 { 20, 0 << WM831X_CHG_ITERM_SHIFT },
165 { 30, 1 << WM831X_CHG_ITERM_SHIFT },
166 { 40, 2 << WM831X_CHG_ITERM_SHIFT },
167 { 50, 3 << WM831X_CHG_ITERM_SHIFT },
168 { 60, 4 << WM831X_CHG_ITERM_SHIFT },
169 { 70, 5 << WM831X_CHG_ITERM_SHIFT },
170 { 80, 6 << WM831X_CHG_ITERM_SHIFT },
171 { 90, 7 << WM831X_CHG_ITERM_SHIFT },
172};
173
174static struct chg_map chg_times[] = {
175 { 60, 0 << WM831X_CHG_TIME_SHIFT },
176 { 90, 1 << WM831X_CHG_TIME_SHIFT },
177 { 120, 2 << WM831X_CHG_TIME_SHIFT },
178 { 150, 3 << WM831X_CHG_TIME_SHIFT },
179 { 180, 4 << WM831X_CHG_TIME_SHIFT },
180 { 210, 5 << WM831X_CHG_TIME_SHIFT },
181 { 240, 6 << WM831X_CHG_TIME_SHIFT },
182 { 270, 7 << WM831X_CHG_TIME_SHIFT },
183 { 300, 8 << WM831X_CHG_TIME_SHIFT },
184 { 330, 9 << WM831X_CHG_TIME_SHIFT },
185 { 360, 10 << WM831X_CHG_TIME_SHIFT },
186 { 390, 11 << WM831X_CHG_TIME_SHIFT },
187 { 420, 12 << WM831X_CHG_TIME_SHIFT },
188 { 450, 13 << WM831X_CHG_TIME_SHIFT },
189 { 480, 14 << WM831X_CHG_TIME_SHIFT },
190 { 510, 15 << WM831X_CHG_TIME_SHIFT },
191};
192
193static void wm831x_battey_apply_config(struct wm831x *wm831x,
194 struct chg_map *map, int count, int val,
195 int *reg, const char *name,
196 const char *units)
197{
198 int i;
199
200 for (i = 0; i < count; i++)
201 if (val == map[i].val)
202 break;
203 if (i == count) {
204 dev_err(wm831x->dev, "Invalid %s %d%s\n",
205 name, val, units);
206 } else {
207 *reg |= map[i].reg_val;
208 dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
209 }
210}
211
212static void wm831x_config_battery(struct wm831x *wm831x)
213{
214 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
215 struct wm831x_battery_pdata *pdata;
216 int ret, reg1, reg2;
217
218 if (!wm831x_pdata || !wm831x_pdata->battery) {
219 dev_warn(wm831x->dev,
220 "No battery charger configuration\n");
221 return;
222 }
223
224 pdata = wm831x_pdata->battery;
225
226 reg1 = 0;
227 reg2 = 0;
228
229 if (!pdata->enable) {
230 dev_info(wm831x->dev, "Battery charger disabled\n");
231 return;
232 }
233
234 reg1 |= WM831X_CHG_ENA;
235 if (pdata->off_mask)
236 reg2 |= WM831X_CHG_OFF_MSK;
237 if (pdata->fast_enable)
238 reg1 |= WM831X_CHG_FAST;
239
240 wm831x_battey_apply_config(wm831x, trickle_ilims,
241 ARRAY_SIZE(trickle_ilims),
242 pdata->trickle_ilim, &reg2,
243 "trickle charge current limit", "mA");
244
245 wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
246 pdata->vsel, &reg2,
247 "target voltage", "mV");
248
249 wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
250 pdata->fast_ilim, &reg2,
251 "fast charge current limit", "mA");
252
253 wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
254 pdata->eoc_iterm, &reg1,
255 "end of charge current threshold", "mA");
256
257 wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
258 pdata->timeout, &reg2,
259 "charger timeout", "min");
260
261 ret = wm831x_reg_unlock(wm831x);
262 if (ret != 0) {
263 dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
264 return;
265 }
266
267 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
268 WM831X_CHG_ENA_MASK |
269 WM831X_CHG_FAST_MASK |
270 WM831X_CHG_ITERM_MASK |
271 WM831X_CHG_ITERM_MASK,
272 reg1);
273 if (ret != 0)
274 dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
275 ret);
276
277 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
278 WM831X_CHG_OFF_MSK |
279 WM831X_CHG_TIME_MASK |
280 WM831X_CHG_FAST_ILIM_MASK |
281 WM831X_CHG_TRKL_ILIM_MASK |
282 WM831X_CHG_VSEL_MASK,
283 reg2);
284 if (ret != 0)
285 dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
286 ret);
287
288 wm831x_reg_lock(wm831x);
289}
290
291static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
292{
293 int ret;
294
295 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
296 if (ret < 0)
297 return ret;
298
299 if (ret & WM831X_PWR_SRC_BATT) {
300 *status = POWER_SUPPLY_STATUS_DISCHARGING;
301 return 0;
302 }
303
304 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
305 if (ret < 0)
306 return ret;
307
308 switch (ret & WM831X_CHG_STATE_MASK) {
309 case WM831X_CHG_STATE_OFF:
310 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
311 break;
312 case WM831X_CHG_STATE_TRICKLE:
313 case WM831X_CHG_STATE_FAST:
314 *status = POWER_SUPPLY_STATUS_CHARGING;
315 break;
316
317 default:
318 *status = POWER_SUPPLY_STATUS_UNKNOWN;
319 break;
320 }
321
322 return 0;
323}
324
325static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
326{
327 int ret;
328
329 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
330 if (ret < 0)
331 return ret;
332
333 switch (ret & WM831X_CHG_STATE_MASK) {
334 case WM831X_CHG_STATE_TRICKLE:
335 case WM831X_CHG_STATE_TRICKLE_OT:
336 *type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
337 break;
338 case WM831X_CHG_STATE_FAST:
339 case WM831X_CHG_STATE_FAST_OT:
340 *type = POWER_SUPPLY_CHARGE_TYPE_FAST;
341 break;
342 default:
343 *type = POWER_SUPPLY_CHARGE_TYPE_NONE;
344 break;
345 }
346
347 return 0;
348}
349
350static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
351{
352 int ret;
353
354 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
355 if (ret < 0)
356 return ret;
357
358 if (ret & WM831X_BATT_HOT_STS) {
359 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
360 return 0;
361 }
362
363 if (ret & WM831X_BATT_COLD_STS) {
364 *health = POWER_SUPPLY_HEALTH_COLD;
365 return 0;
366 }
367
368 if (ret & WM831X_BATT_OV_STS) {
369 *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
370 return 0;
371 }
372
373 switch (ret & WM831X_CHG_STATE_MASK) {
374 case WM831X_CHG_STATE_TRICKLE_OT:
375 case WM831X_CHG_STATE_FAST_OT:
376 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
377 break;
378 case WM831X_CHG_STATE_DEFECTIVE:
379 *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
380 break;
381 default:
382 *health = POWER_SUPPLY_HEALTH_GOOD;
383 break;
384 }
385
386 return 0;
387}
388
389static int wm831x_bat_get_prop(struct power_supply *psy,
390 enum power_supply_property psp,
391 union power_supply_propval *val)
392{
393 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
394 struct wm831x *wm831x = wm831x_power->wm831x;
395 int ret = 0;
396
397 switch (psp) {
398 case POWER_SUPPLY_PROP_STATUS:
399 ret = wm831x_bat_check_status(wm831x, &val->intval);
400 break;
401 case POWER_SUPPLY_PROP_ONLINE:
402 ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT,
403 val);
404 break;
405 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
406 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
407 break;
408 case POWER_SUPPLY_PROP_HEALTH:
409 ret = wm831x_bat_check_health(wm831x, &val->intval);
410 break;
411 case POWER_SUPPLY_PROP_CHARGE_TYPE:
412 ret = wm831x_bat_check_type(wm831x, &val->intval);
413 break;
414 default:
415 ret = -EINVAL;
416 break;
417 }
418
419 return ret;
420}
421
422static enum power_supply_property wm831x_bat_props[] = {
423 POWER_SUPPLY_PROP_STATUS,
424 POWER_SUPPLY_PROP_ONLINE,
425 POWER_SUPPLY_PROP_VOLTAGE_NOW,
426 POWER_SUPPLY_PROP_HEALTH,
427 POWER_SUPPLY_PROP_CHARGE_TYPE,
428};
429
430static const char *wm831x_bat_irqs[] = {
431 "BATT HOT",
432 "BATT COLD",
433 "BATT FAIL",
434 "OV",
435 "END",
436 "TO",
437 "MODE",
438 "START",
439};
440
441static irqreturn_t wm831x_bat_irq(int irq, void *data)
442{
443 struct wm831x_power *wm831x_power = data;
444 struct wm831x *wm831x = wm831x_power->wm831x;
445
446 dev_dbg(wm831x->dev, "Battery status changed: %d\n", irq);
447
448 /* The battery charger is autonomous so we don't need to do
449 * anything except kick user space */
450 power_supply_changed(&wm831x_power->battery);
451
452 return IRQ_HANDLED;
453}
454
455
456/*********************************************************************
457 * Backup supply properties
458 *********************************************************************/
459
460static void wm831x_config_backup(struct wm831x *wm831x)
461{
462 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
463 struct wm831x_backup_pdata *pdata;
464 int ret, reg;
465
466 if (!wm831x_pdata || !wm831x_pdata->backup) {
467 dev_warn(wm831x->dev,
468 "No backup battery charger configuration\n");
469 return;
470 }
471
472 pdata = wm831x_pdata->backup;
473
474 reg = 0;
475
476 if (pdata->charger_enable)
477 reg |= WM831X_BKUP_CHG_ENA | WM831X_BKUP_BATT_DET_ENA;
478 if (pdata->no_constant_voltage)
479 reg |= WM831X_BKUP_CHG_MODE;
480
481 switch (pdata->vlim) {
482 case 2500:
483 break;
484 case 3100:
485 reg |= WM831X_BKUP_CHG_VLIM;
486 break;
487 default:
488 dev_err(wm831x->dev, "Invalid backup voltage limit %dmV\n",
489 pdata->vlim);
490 }
491
492 switch (pdata->ilim) {
493 case 100:
494 break;
495 case 200:
496 reg |= 1;
497 break;
498 case 300:
499 reg |= 2;
500 break;
501 case 400:
502 reg |= 3;
503 break;
504 default:
505 dev_err(wm831x->dev, "Invalid backup current limit %duA\n",
506 pdata->ilim);
507 }
508
509 ret = wm831x_reg_unlock(wm831x);
510 if (ret != 0) {
511 dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
512 return;
513 }
514
515 ret = wm831x_set_bits(wm831x, WM831X_BACKUP_CHARGER_CONTROL,
516 WM831X_BKUP_CHG_ENA_MASK |
517 WM831X_BKUP_CHG_MODE_MASK |
518 WM831X_BKUP_BATT_DET_ENA_MASK |
519 WM831X_BKUP_CHG_VLIM_MASK |
520 WM831X_BKUP_CHG_ILIM_MASK,
521 reg);
522 if (ret != 0)
523 dev_err(wm831x->dev,
524 "Failed to set backup charger config: %d\n", ret);
525
526 wm831x_reg_lock(wm831x);
527}
528
529static int wm831x_backup_get_prop(struct power_supply *psy,
530 enum power_supply_property psp,
531 union power_supply_propval *val)
532{
533 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
534 struct wm831x *wm831x = wm831x_power->wm831x;
535 int ret = 0;
536
537 ret = wm831x_reg_read(wm831x, WM831X_BACKUP_CHARGER_CONTROL);
538 if (ret < 0)
539 return ret;
540
541 switch (psp) {
542 case POWER_SUPPLY_PROP_STATUS:
543 if (ret & WM831X_BKUP_CHG_STS)
544 val->intval = POWER_SUPPLY_STATUS_CHARGING;
545 else
546 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
547 break;
548
549 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
550 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BKUP_BATT,
551 val);
552 break;
553
554 case POWER_SUPPLY_PROP_PRESENT:
555 if (ret & WM831X_BKUP_CHG_STS)
556 val->intval = 1;
557 else
558 val->intval = 0;
559 break;
560
561 default:
562 ret = -EINVAL;
563 break;
564 }
565
566 return ret;
567}
568
569static enum power_supply_property wm831x_backup_props[] = {
570 POWER_SUPPLY_PROP_STATUS,
571 POWER_SUPPLY_PROP_VOLTAGE_NOW,
572 POWER_SUPPLY_PROP_PRESENT,
573};
574
575/*********************************************************************
576 * Initialisation
577 *********************************************************************/
578
579static irqreturn_t wm831x_syslo_irq(int irq, void *data)
580{
581 struct wm831x_power *wm831x_power = data;
582 struct wm831x *wm831x = wm831x_power->wm831x;
583
584 /* Not much we can actually *do* but tell people for
585 * posterity, we're probably about to run out of power. */
586 dev_crit(wm831x->dev, "SYSVDD under voltage\n");
587
588 return IRQ_HANDLED;
589}
590
591static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
592{
593 struct wm831x_power *wm831x_power = data;
594 struct wm831x *wm831x = wm831x_power->wm831x;
595
596 dev_dbg(wm831x->dev, "Power source changed\n");
597
598 /* Just notify for everything - little harm in overnotifying.
599 * The backup battery is not a power source while the system
600 * is running so skip that.
601 */
602 power_supply_changed(&wm831x_power->battery);
603 power_supply_changed(&wm831x_power->usb);
604 power_supply_changed(&wm831x_power->wall);
605
606 return IRQ_HANDLED;
607}
608
609static __devinit int wm831x_power_probe(struct platform_device *pdev)
610{
611 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
612 struct wm831x_power *power;
613 struct power_supply *usb;
614 struct power_supply *battery;
615 struct power_supply *wall;
616 struct power_supply *backup;
617 int ret, irq, i;
618
619 power = kzalloc(sizeof(struct wm831x_power), GFP_KERNEL);
620 if (power == NULL)
621 return -ENOMEM;
622
623 power->wm831x = wm831x;
624 platform_set_drvdata(pdev, power);
625
626 usb = &power->usb;
627 battery = &power->battery;
628 wall = &power->wall;
629 backup = &power->backup;
630
631 /* We ignore configuration failures since we can still read back
632 * the status without enabling either of the chargers.
633 */
634 wm831x_config_battery(wm831x);
635 wm831x_config_backup(wm831x);
636
637 wall->name = "wm831x-wall";
638 wall->type = POWER_SUPPLY_TYPE_MAINS;
639 wall->properties = wm831x_wall_props;
640 wall->num_properties = ARRAY_SIZE(wm831x_wall_props);
641 wall->get_property = wm831x_wall_get_prop;
642 ret = power_supply_register(&pdev->dev, wall);
643 if (ret)
644 goto err_kmalloc;
645
646 battery->name = "wm831x-battery";
647 battery->properties = wm831x_bat_props;
648 battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
649 battery->get_property = wm831x_bat_get_prop;
650 battery->use_for_apm = 1;
651 ret = power_supply_register(&pdev->dev, battery);
652 if (ret)
653 goto err_wall;
654
655 usb->name = "wm831x-usb",
656 usb->type = POWER_SUPPLY_TYPE_USB;
657 usb->properties = wm831x_usb_props;
658 usb->num_properties = ARRAY_SIZE(wm831x_usb_props);
659 usb->get_property = wm831x_usb_get_prop;
660 ret = power_supply_register(&pdev->dev, usb);
661 if (ret)
662 goto err_battery;
663
664 backup->name = "wm831x-backup";
665 backup->type = POWER_SUPPLY_TYPE_BATTERY;
666 backup->properties = wm831x_backup_props;
667 backup->num_properties = ARRAY_SIZE(wm831x_backup_props);
668 backup->get_property = wm831x_backup_get_prop;
669 ret = power_supply_register(&pdev->dev, backup);
670 if (ret)
671 goto err_usb;
672
673 irq = platform_get_irq_byname(pdev, "SYSLO");
674 ret = wm831x_request_irq(wm831x, irq, wm831x_syslo_irq,
675 IRQF_TRIGGER_RISING, "SYSLO",
676 power);
677 if (ret != 0) {
678 dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
679 irq, ret);
680 goto err_backup;
681 }
682
683 irq = platform_get_irq_byname(pdev, "PWR SRC");
684 ret = wm831x_request_irq(wm831x, irq, wm831x_pwr_src_irq,
685 IRQF_TRIGGER_RISING, "Power source",
686 power);
687 if (ret != 0) {
688 dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
689 irq, ret);
690 goto err_syslo;
691 }
692
693 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
694 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
695 ret = wm831x_request_irq(wm831x, irq, wm831x_bat_irq,
696 IRQF_TRIGGER_RISING,
697 wm831x_bat_irqs[i],
698 power);
699 if (ret != 0) {
700 dev_err(&pdev->dev,
701 "Failed to request %s IRQ %d: %d\n",
702 wm831x_bat_irqs[i], irq, ret);
703 goto err_bat_irq;
704 }
705 }
706
707 return ret;
708
709err_bat_irq:
710 for (; i >= 0; i--) {
711 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
712 wm831x_free_irq(wm831x, irq, power);
713 }
714 irq = platform_get_irq_byname(pdev, "PWR SRC");
715 wm831x_free_irq(wm831x, irq, power);
716err_syslo:
717 irq = platform_get_irq_byname(pdev, "SYSLO");
718 wm831x_free_irq(wm831x, irq, power);
719err_backup:
720 power_supply_unregister(backup);
721err_usb:
722 power_supply_unregister(usb);
723err_battery:
724 power_supply_unregister(battery);
725err_wall:
726 power_supply_unregister(wall);
727err_kmalloc:
728 kfree(power);
729 return ret;
730}
731
732static __devexit int wm831x_power_remove(struct platform_device *pdev)
733{
734 struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
735 struct wm831x *wm831x = wm831x_power->wm831x;
736 int irq, i;
737
738 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
739 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
740 wm831x_free_irq(wm831x, irq, wm831x_power);
741 }
742
743 irq = platform_get_irq_byname(pdev, "PWR SRC");
744 wm831x_free_irq(wm831x, irq, wm831x_power);
745
746 irq = platform_get_irq_byname(pdev, "SYSLO");
747 wm831x_free_irq(wm831x, irq, wm831x_power);
748
749 power_supply_unregister(&wm831x_power->backup);
750 power_supply_unregister(&wm831x_power->battery);
751 power_supply_unregister(&wm831x_power->wall);
752 power_supply_unregister(&wm831x_power->usb);
753 return 0;
754}
755
756static struct platform_driver wm831x_power_driver = {
757 .probe = wm831x_power_probe,
758 .remove = __devexit_p(wm831x_power_remove),
759 .driver = {
760 .name = "wm831x-power",
761 },
762};
763
764static int __init wm831x_power_init(void)
765{
766 return platform_driver_register(&wm831x_power_driver);
767}
768module_init(wm831x_power_init);
769
770static void __exit wm831x_power_exit(void)
771{
772 platform_driver_unregister(&wm831x_power_driver);
773}
774module_exit(wm831x_power_exit);
775
776MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
777MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
778MODULE_LICENSE("GPL");
779MODULE_ALIAS("platform:wm831x-power");
Linux kernel - Deliverables
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