1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * PMU driver for Wolfson Microelectronics wm831x PMICs
4 *
5 * Copyright 2009 Wolfson Microelectronics PLC.
6 */
7
8 #include <linux/module.h>
9 #include <linux/err.h>
10 #include <linux/platform_device.h>
11 #include <linux/power_supply.h>
12 #include <linux/slab.h>
13 #include <linux/usb/phy.h>
14
15 #include <linux/mfd/wm831x/core.h>
16 #include <linux/mfd/wm831x/auxadc.h>
17 #include <linux/mfd/wm831x/pmu.h>
18 #include <linux/mfd/wm831x/pdata.h>
19
20 struct wm831x_power {
21 struct wm831x *wm831x;
22 struct power_supply *wall;
23 struct power_supply *usb;
24 struct power_supply *battery;
25 struct power_supply_desc wall_desc;
26 struct power_supply_desc usb_desc;
27 struct power_supply_desc battery_desc;
28 char wall_name[20];
29 char usb_name[20];
30 char battery_name[20];
31 bool have_battery;
32 struct usb_phy *usb_phy;
33 struct notifier_block usb_notify;
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 /* In milliamps */
129 static const unsigned int wm831x_usb_limits[] = {
130 0,
131 2,
132 100,
133 500,
134 900,
135 1500,
136 1800,
137 550,
138 };
139
wm831x_usb_limit_change(struct notifier_block * nb,unsigned long limit,void * data)140 static int wm831x_usb_limit_change(struct notifier_block *nb,
141 unsigned long limit, void *data)
142 {
143 struct wm831x_power *wm831x_power = container_of(nb,
144 struct wm831x_power,
145 usb_notify);
146 unsigned int i, best;
147
148 /* Find the highest supported limit */
149 best = 0;
150 for (i = 0; i < ARRAY_SIZE(wm831x_usb_limits); i++) {
151 if (limit >= wm831x_usb_limits[i] &&
152 wm831x_usb_limits[best] < wm831x_usb_limits[i])
153 best = i;
154 }
155
156 dev_dbg(wm831x_power->wm831x->dev,
157 "Limiting USB current to %umA", wm831x_usb_limits[best]);
158
159 wm831x_set_bits(wm831x_power->wm831x, WM831X_POWER_STATE,
160 WM831X_USB_ILIM_MASK, best);
161
162 return 0;
163 }
164
165 /*********************************************************************
166 * Battery properties
167 *********************************************************************/
168
169 struct chg_map {
170 int val;
171 int reg_val;
172 };
173
174 static struct chg_map trickle_ilims[] = {
175 { 50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT },
176 { 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT },
177 { 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT },
178 { 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT },
179 };
180
181 static struct chg_map vsels[] = {
182 { 4050, 0 << WM831X_CHG_VSEL_SHIFT },
183 { 4100, 1 << WM831X_CHG_VSEL_SHIFT },
184 { 4150, 2 << WM831X_CHG_VSEL_SHIFT },
185 { 4200, 3 << WM831X_CHG_VSEL_SHIFT },
186 };
187
188 static struct chg_map fast_ilims[] = {
189 { 0, 0 << WM831X_CHG_FAST_ILIM_SHIFT },
190 { 50, 1 << WM831X_CHG_FAST_ILIM_SHIFT },
191 { 100, 2 << WM831X_CHG_FAST_ILIM_SHIFT },
192 { 150, 3 << WM831X_CHG_FAST_ILIM_SHIFT },
193 { 200, 4 << WM831X_CHG_FAST_ILIM_SHIFT },
194 { 250, 5 << WM831X_CHG_FAST_ILIM_SHIFT },
195 { 300, 6 << WM831X_CHG_FAST_ILIM_SHIFT },
196 { 350, 7 << WM831X_CHG_FAST_ILIM_SHIFT },
197 { 400, 8 << WM831X_CHG_FAST_ILIM_SHIFT },
198 { 450, 9 << WM831X_CHG_FAST_ILIM_SHIFT },
199 { 500, 10 << WM831X_CHG_FAST_ILIM_SHIFT },
200 { 600, 11 << WM831X_CHG_FAST_ILIM_SHIFT },
201 { 700, 12 << WM831X_CHG_FAST_ILIM_SHIFT },
202 { 800, 13 << WM831X_CHG_FAST_ILIM_SHIFT },
203 { 900, 14 << WM831X_CHG_FAST_ILIM_SHIFT },
204 { 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT },
205 };
206
207 static struct chg_map eoc_iterms[] = {
208 { 20, 0 << WM831X_CHG_ITERM_SHIFT },
209 { 30, 1 << WM831X_CHG_ITERM_SHIFT },
210 { 40, 2 << WM831X_CHG_ITERM_SHIFT },
211 { 50, 3 << WM831X_CHG_ITERM_SHIFT },
212 { 60, 4 << WM831X_CHG_ITERM_SHIFT },
213 { 70, 5 << WM831X_CHG_ITERM_SHIFT },
214 { 80, 6 << WM831X_CHG_ITERM_SHIFT },
215 { 90, 7 << WM831X_CHG_ITERM_SHIFT },
216 };
217
218 static struct chg_map chg_times[] = {
219 { 60, 0 << WM831X_CHG_TIME_SHIFT },
220 { 90, 1 << WM831X_CHG_TIME_SHIFT },
221 { 120, 2 << WM831X_CHG_TIME_SHIFT },
222 { 150, 3 << WM831X_CHG_TIME_SHIFT },
223 { 180, 4 << WM831X_CHG_TIME_SHIFT },
224 { 210, 5 << WM831X_CHG_TIME_SHIFT },
225 { 240, 6 << WM831X_CHG_TIME_SHIFT },
226 { 270, 7 << WM831X_CHG_TIME_SHIFT },
227 { 300, 8 << WM831X_CHG_TIME_SHIFT },
228 { 330, 9 << WM831X_CHG_TIME_SHIFT },
229 { 360, 10 << WM831X_CHG_TIME_SHIFT },
230 { 390, 11 << WM831X_CHG_TIME_SHIFT },
231 { 420, 12 << WM831X_CHG_TIME_SHIFT },
232 { 450, 13 << WM831X_CHG_TIME_SHIFT },
233 { 480, 14 << WM831X_CHG_TIME_SHIFT },
234 { 510, 15 << WM831X_CHG_TIME_SHIFT },
235 };
236
wm831x_battey_apply_config(struct wm831x * wm831x,struct chg_map * map,int count,int val,int * reg,const char * name,const char * units)237 static void wm831x_battey_apply_config(struct wm831x *wm831x,
238 struct chg_map *map, int count, int val,
239 int *reg, const char *name,
240 const char *units)
241 {
242 int i;
243
244 for (i = 0; i < count; i++)
245 if (val == map[i].val)
246 break;
247 if (i == count) {
248 dev_err(wm831x->dev, "Invalid %s %d%s\n",
249 name, val, units);
250 } else {
251 *reg |= map[i].reg_val;
252 dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
253 }
254 }
255
wm831x_config_battery(struct wm831x * wm831x)256 static void wm831x_config_battery(struct wm831x *wm831x)
257 {
258 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
259 struct wm831x_battery_pdata *pdata;
260 int ret, reg1, reg2;
261
262 if (!wm831x_pdata || !wm831x_pdata->battery) {
263 dev_warn(wm831x->dev,
264 "No battery charger configuration\n");
265 return;
266 }
267
268 pdata = wm831x_pdata->battery;
269
270 reg1 = 0;
271 reg2 = 0;
272
273 if (!pdata->enable) {
274 dev_info(wm831x->dev, "Battery charger disabled\n");
275 return;
276 }
277
278 reg1 |= WM831X_CHG_ENA;
279 if (pdata->off_mask)
280 reg2 |= WM831X_CHG_OFF_MSK;
281 if (pdata->fast_enable)
282 reg1 |= WM831X_CHG_FAST;
283
284 wm831x_battey_apply_config(wm831x, trickle_ilims,
285 ARRAY_SIZE(trickle_ilims),
286 pdata->trickle_ilim, ®2,
287 "trickle charge current limit", "mA");
288
289 wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
290 pdata->vsel, ®2,
291 "target voltage", "mV");
292
293 wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
294 pdata->fast_ilim, ®2,
295 "fast charge current limit", "mA");
296
297 wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
298 pdata->eoc_iterm, ®1,
299 "end of charge current threshold", "mA");
300
301 wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
302 pdata->timeout, ®2,
303 "charger timeout", "min");
304
305 ret = wm831x_reg_unlock(wm831x);
306 if (ret != 0) {
307 dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
308 return;
309 }
310
311 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
312 WM831X_CHG_ENA_MASK |
313 WM831X_CHG_FAST_MASK |
314 WM831X_CHG_ITERM_MASK,
315 reg1);
316 if (ret != 0)
317 dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
318 ret);
319
320 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
321 WM831X_CHG_OFF_MSK |
322 WM831X_CHG_TIME_MASK |
323 WM831X_CHG_FAST_ILIM_MASK |
324 WM831X_CHG_TRKL_ILIM_MASK |
325 WM831X_CHG_VSEL_MASK,
326 reg2);
327 if (ret != 0)
328 dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
329 ret);
330
331 wm831x_reg_lock(wm831x);
332 }
333
wm831x_bat_check_status(struct wm831x * wm831x,int * status)334 static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
335 {
336 int ret;
337
338 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
339 if (ret < 0)
340 return ret;
341
342 if (ret & WM831X_PWR_SRC_BATT) {
343 *status = POWER_SUPPLY_STATUS_DISCHARGING;
344 return 0;
345 }
346
347 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
348 if (ret < 0)
349 return ret;
350
351 switch (ret & WM831X_CHG_STATE_MASK) {
352 case WM831X_CHG_STATE_OFF:
353 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
354 break;
355 case WM831X_CHG_STATE_TRICKLE:
356 case WM831X_CHG_STATE_FAST:
357 *status = POWER_SUPPLY_STATUS_CHARGING;
358 break;
359
360 default:
361 *status = POWER_SUPPLY_STATUS_UNKNOWN;
362 break;
363 }
364
365 return 0;
366 }
367
wm831x_bat_check_type(struct wm831x * wm831x,int * type)368 static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
369 {
370 int ret;
371
372 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
373 if (ret < 0)
374 return ret;
375
376 switch (ret & WM831X_CHG_STATE_MASK) {
377 case WM831X_CHG_STATE_TRICKLE:
378 case WM831X_CHG_STATE_TRICKLE_OT:
379 *type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
380 break;
381 case WM831X_CHG_STATE_FAST:
382 case WM831X_CHG_STATE_FAST_OT:
383 *type = POWER_SUPPLY_CHARGE_TYPE_FAST;
384 break;
385 default:
386 *type = POWER_SUPPLY_CHARGE_TYPE_NONE;
387 break;
388 }
389
390 return 0;
391 }
392
wm831x_bat_check_health(struct wm831x * wm831x,int * health)393 static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
394 {
395 int ret;
396
397 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
398 if (ret < 0)
399 return ret;
400
401 if (ret & WM831X_BATT_HOT_STS) {
402 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
403 return 0;
404 }
405
406 if (ret & WM831X_BATT_COLD_STS) {
407 *health = POWER_SUPPLY_HEALTH_COLD;
408 return 0;
409 }
410
411 if (ret & WM831X_BATT_OV_STS) {
412 *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
413 return 0;
414 }
415
416 switch (ret & WM831X_CHG_STATE_MASK) {
417 case WM831X_CHG_STATE_TRICKLE_OT:
418 case WM831X_CHG_STATE_FAST_OT:
419 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
420 break;
421 case WM831X_CHG_STATE_DEFECTIVE:
422 *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
423 break;
424 default:
425 *health = POWER_SUPPLY_HEALTH_GOOD;
426 break;
427 }
428
429 return 0;
430 }
431
wm831x_bat_get_prop(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)432 static int wm831x_bat_get_prop(struct power_supply *psy,
433 enum power_supply_property psp,
434 union power_supply_propval *val)
435 {
436 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent);
437 struct wm831x *wm831x = wm831x_power->wm831x;
438 int ret = 0;
439
440 switch (psp) {
441 case POWER_SUPPLY_PROP_STATUS:
442 ret = wm831x_bat_check_status(wm831x, &val->intval);
443 break;
444 case POWER_SUPPLY_PROP_ONLINE:
445 ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT,
446 val);
447 break;
448 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
449 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
450 break;
451 case POWER_SUPPLY_PROP_HEALTH:
452 ret = wm831x_bat_check_health(wm831x, &val->intval);
453 break;
454 case POWER_SUPPLY_PROP_CHARGE_TYPE:
455 ret = wm831x_bat_check_type(wm831x, &val->intval);
456 break;
457 default:
458 ret = -EINVAL;
459 break;
460 }
461
462 return ret;
463 }
464
465 static enum power_supply_property wm831x_bat_props[] = {
466 POWER_SUPPLY_PROP_STATUS,
467 POWER_SUPPLY_PROP_ONLINE,
468 POWER_SUPPLY_PROP_VOLTAGE_NOW,
469 POWER_SUPPLY_PROP_HEALTH,
470 POWER_SUPPLY_PROP_CHARGE_TYPE,
471 };
472
473 static const char *wm831x_bat_irqs[] = {
474 "BATT HOT",
475 "BATT COLD",
476 "BATT FAIL",
477 "OV",
478 "END",
479 "TO",
480 "MODE",
481 "START",
482 };
483
wm831x_bat_irq(int irq,void * data)484 static irqreturn_t wm831x_bat_irq(int irq, void *data)
485 {
486 struct wm831x_power *wm831x_power = data;
487 struct wm831x *wm831x = wm831x_power->wm831x;
488
489 dev_dbg(wm831x->dev, "Battery status changed: %d\n", irq);
490
491 /* The battery charger is autonomous so we don't need to do
492 * anything except kick user space */
493 if (wm831x_power->have_battery)
494 power_supply_changed(wm831x_power->battery);
495
496 return IRQ_HANDLED;
497 }
498
499
500 /*********************************************************************
501 * Initialisation
502 *********************************************************************/
503
wm831x_syslo_irq(int irq,void * data)504 static irqreturn_t wm831x_syslo_irq(int irq, void *data)
505 {
506 struct wm831x_power *wm831x_power = data;
507 struct wm831x *wm831x = wm831x_power->wm831x;
508
509 /* Not much we can actually *do* but tell people for
510 * posterity, we're probably about to run out of power. */
511 dev_crit(wm831x->dev, "SYSVDD under voltage\n");
512
513 return IRQ_HANDLED;
514 }
515
wm831x_pwr_src_irq(int irq,void * data)516 static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
517 {
518 struct wm831x_power *wm831x_power = data;
519 struct wm831x *wm831x = wm831x_power->wm831x;
520
521 dev_dbg(wm831x->dev, "Power source changed\n");
522
523 /* Just notify for everything - little harm in overnotifying. */
524 if (wm831x_power->have_battery)
525 power_supply_changed(wm831x_power->battery);
526 power_supply_changed(wm831x_power->usb);
527 power_supply_changed(wm831x_power->wall);
528
529 return IRQ_HANDLED;
530 }
531
wm831x_power_probe(struct platform_device * pdev)532 static int wm831x_power_probe(struct platform_device *pdev)
533 {
534 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
535 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
536 struct wm831x_power *power;
537 int ret, irq, i;
538
539 power = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_power),
540 GFP_KERNEL);
541 if (power == NULL)
542 return -ENOMEM;
543
544 power->wm831x = wm831x;
545 platform_set_drvdata(pdev, power);
546
547 if (wm831x_pdata && wm831x_pdata->wm831x_num) {
548 snprintf(power->wall_name, sizeof(power->wall_name),
549 "wm831x-wall.%d", wm831x_pdata->wm831x_num);
550 snprintf(power->battery_name, sizeof(power->wall_name),
551 "wm831x-battery.%d", wm831x_pdata->wm831x_num);
552 snprintf(power->usb_name, sizeof(power->wall_name),
553 "wm831x-usb.%d", wm831x_pdata->wm831x_num);
554 } else {
555 snprintf(power->wall_name, sizeof(power->wall_name),
556 "wm831x-wall");
557 snprintf(power->battery_name, sizeof(power->wall_name),
558 "wm831x-battery");
559 snprintf(power->usb_name, sizeof(power->wall_name),
560 "wm831x-usb");
561 }
562
563 /* We ignore configuration failures since we can still read back
564 * the status without enabling the charger.
565 */
566 wm831x_config_battery(wm831x);
567
568 power->wall_desc.name = power->wall_name;
569 power->wall_desc.type = POWER_SUPPLY_TYPE_MAINS;
570 power->wall_desc.properties = wm831x_wall_props;
571 power->wall_desc.num_properties = ARRAY_SIZE(wm831x_wall_props);
572 power->wall_desc.get_property = wm831x_wall_get_prop;
573 power->wall = power_supply_register(&pdev->dev, &power->wall_desc,
574 NULL);
575 if (IS_ERR(power->wall)) {
576 ret = PTR_ERR(power->wall);
577 goto err;
578 }
579
580 power->usb_desc.name = power->usb_name,
581 power->usb_desc.type = POWER_SUPPLY_TYPE_USB;
582 power->usb_desc.properties = wm831x_usb_props;
583 power->usb_desc.num_properties = ARRAY_SIZE(wm831x_usb_props);
584 power->usb_desc.get_property = wm831x_usb_get_prop;
585 power->usb = power_supply_register(&pdev->dev, &power->usb_desc, NULL);
586 if (IS_ERR(power->usb)) {
587 ret = PTR_ERR(power->usb);
588 goto err_wall;
589 }
590
591 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1);
592 if (ret < 0)
593 goto err_wall;
594 power->have_battery = ret & WM831X_CHG_ENA;
595
596 if (power->have_battery) {
597 power->battery_desc.name = power->battery_name;
598 power->battery_desc.properties = wm831x_bat_props;
599 power->battery_desc.num_properties = ARRAY_SIZE(wm831x_bat_props);
600 power->battery_desc.get_property = wm831x_bat_get_prop;
601 power->battery_desc.use_for_apm = 1;
602 power->battery = power_supply_register(&pdev->dev,
603 &power->battery_desc,
604 NULL);
605 if (IS_ERR(power->battery)) {
606 ret = PTR_ERR(power->battery);
607 goto err_usb;
608 }
609 }
610
611 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO"));
612 ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
613 IRQF_TRIGGER_RISING | IRQF_ONESHOT, "System power low",
614 power);
615 if (ret != 0) {
616 dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
617 irq, ret);
618 goto err_battery;
619 }
620
621 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC"));
622 ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq,
623 IRQF_TRIGGER_RISING | IRQF_ONESHOT, "Power source",
624 power);
625 if (ret != 0) {
626 dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
627 irq, ret);
628 goto err_syslo;
629 }
630
631 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
632 irq = wm831x_irq(wm831x,
633 platform_get_irq_byname(pdev,
634 wm831x_bat_irqs[i]));
635 ret = request_threaded_irq(irq, NULL, wm831x_bat_irq,
636 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
637 wm831x_bat_irqs[i],
638 power);
639 if (ret != 0) {
640 dev_err(&pdev->dev,
641 "Failed to request %s IRQ %d: %d\n",
642 wm831x_bat_irqs[i], irq, ret);
643 goto err_bat_irq;
644 }
645 }
646
647 power->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "phys", 0);
648 ret = PTR_ERR_OR_ZERO(power->usb_phy);
649
650 switch (ret) {
651 case 0:
652 power->usb_notify.notifier_call = wm831x_usb_limit_change;
653 ret = usb_register_notifier(power->usb_phy, &power->usb_notify);
654 if (ret) {
655 dev_err(&pdev->dev, "Failed to register notifier: %d\n",
656 ret);
657 goto err_bat_irq;
658 }
659 break;
660 case -EINVAL:
661 case -ENODEV:
662 /* ignore missing usb-phy, it's optional */
663 power->usb_phy = NULL;
664 ret = 0;
665 break;
666 default:
667 dev_err(&pdev->dev, "Failed to find USB phy: %d\n", ret);
668 fallthrough;
669 case -EPROBE_DEFER:
670 goto err_bat_irq;
671 break;
672 }
673
674 return ret;
675
676 err_bat_irq:
677 --i;
678 for (; i >= 0; i--) {
679 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
680 free_irq(irq, power);
681 }
682 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC"));
683 free_irq(irq, power);
684 err_syslo:
685 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO"));
686 free_irq(irq, power);
687 err_battery:
688 if (power->have_battery)
689 power_supply_unregister(power->battery);
690 err_usb:
691 power_supply_unregister(power->usb);
692 err_wall:
693 power_supply_unregister(power->wall);
694 err:
695 return ret;
696 }
697
wm831x_power_remove(struct platform_device * pdev)698 static int wm831x_power_remove(struct platform_device *pdev)
699 {
700 struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
701 struct wm831x *wm831x = wm831x_power->wm831x;
702 int irq, i;
703
704 if (wm831x_power->usb_phy) {
705 usb_unregister_notifier(wm831x_power->usb_phy,
706 &wm831x_power->usb_notify);
707 }
708
709 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
710 irq = wm831x_irq(wm831x,
711 platform_get_irq_byname(pdev,
712 wm831x_bat_irqs[i]));
713 free_irq(irq, wm831x_power);
714 }
715
716 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC"));
717 free_irq(irq, wm831x_power);
718
719 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO"));
720 free_irq(irq, wm831x_power);
721
722 if (wm831x_power->have_battery)
723 power_supply_unregister(wm831x_power->battery);
724 power_supply_unregister(wm831x_power->wall);
725 power_supply_unregister(wm831x_power->usb);
726 return 0;
727 }
728
729 static struct platform_driver wm831x_power_driver = {
730 .probe = wm831x_power_probe,
731 .remove = wm831x_power_remove,
732 .driver = {
733 .name = "wm831x-power",
734 },
735 };
736
737 module_platform_driver(wm831x_power_driver);
738
739 MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
740 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
741 MODULE_LICENSE("GPL");
742 MODULE_ALIAS("platform:wm831x-power");
743