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