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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
3961f7c3 MB |
2 | /* |
3 | * PMU driver for Wolfson Microelectronics wm831x PMICs | |
4 | * | |
5 | * Copyright 2009 Wolfson Microelectronics PLC. | |
3961f7c3 MB |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/err.h> | |
10 | #include <linux/platform_device.h> | |
11 | #include <linux/power_supply.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
626b6cd5 | 13 | #include <linux/usb/phy.h> |
3961f7c3 MB |
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; | |
297d716f KK |
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; | |
ccf8fa2d MB |
28 | char wall_name[20]; |
29 | char usb_name[20]; | |
30 | char battery_name[20]; | |
35c3ae5e | 31 | bool have_battery; |
626b6cd5 BW |
32 | struct usb_phy *usb_phy; |
33 | struct notifier_block usb_notify; | |
3961f7c3 MB |
34 | }; |
35 | ||
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 | ||
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 | *********************************************************************/ | |
69 | static int wm831x_wall_get_prop(struct power_supply *psy, | |
70 | enum power_supply_property psp, | |
71 | union power_supply_propval *val) | |
72 | { | |
297d716f | 73 | struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
3961f7c3 MB |
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 | *********************************************************************/ | |
100 | static int wm831x_usb_get_prop(struct power_supply *psy, | |
101 | enum power_supply_property psp, | |
102 | union power_supply_propval *val) | |
103 | { | |
297d716f | 104 | struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
3961f7c3 MB |
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 | ||
626b6cd5 BW |
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 | ||
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 | ||
3961f7c3 MB |
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 | ||
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 | ||
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 | | |
3961f7c3 MB |
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 | ||
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 | ||
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 | ||
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 | ||
432 | static int wm831x_bat_get_prop(struct power_supply *psy, | |
433 | enum power_supply_property psp, | |
434 | union power_supply_propval *val) | |
435 | { | |
297d716f | 436 | struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
3961f7c3 MB |
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 | ||
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 */ | |
35c3ae5e | 493 | if (wm831x_power->have_battery) |
297d716f | 494 | power_supply_changed(wm831x_power->battery); |
3961f7c3 MB |
495 | |
496 | return IRQ_HANDLED; | |
497 | } | |
498 | ||
499 | ||
3961f7c3 MB |
500 | /********************************************************************* |
501 | * Initialisation | |
502 | *********************************************************************/ | |
503 | ||
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 | ||
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 | ||
c26964ea | 523 | /* Just notify for everything - little harm in overnotifying. */ |
35c3ae5e | 524 | if (wm831x_power->have_battery) |
297d716f KK |
525 | power_supply_changed(wm831x_power->battery); |
526 | power_supply_changed(wm831x_power->usb); | |
527 | power_supply_changed(wm831x_power->wall); | |
3961f7c3 MB |
528 | |
529 | return IRQ_HANDLED; | |
530 | } | |
531 | ||
c8afa640 | 532 | static int wm831x_power_probe(struct platform_device *pdev) |
3961f7c3 MB |
533 | { |
534 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
ccf8fa2d | 535 | struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data; |
3961f7c3 | 536 | struct wm831x_power *power; |
3961f7c3 MB |
537 | int ret, irq, i; |
538 | ||
c01576c8 MB |
539 | power = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_power), |
540 | GFP_KERNEL); | |
3961f7c3 MB |
541 | if (power == NULL) |
542 | return -ENOMEM; | |
543 | ||
544 | power->wm831x = wm831x; | |
545 | platform_set_drvdata(pdev, power); | |
546 | ||
ccf8fa2d MB |
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 | ||
3961f7c3 | 563 | /* We ignore configuration failures since we can still read back |
c26964ea | 564 | * the status without enabling the charger. |
3961f7c3 MB |
565 | */ |
566 | wm831x_config_battery(wm831x); | |
3961f7c3 | 567 | |
297d716f KK |
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); | |
c01576c8 | 577 | goto err; |
297d716f | 578 | } |
3961f7c3 | 579 | |
297d716f KK |
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); | |
35c3ae5e | 588 | goto err_wall; |
297d716f | 589 | } |
35c3ae5e MB |
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) { | |
297d716f KK |
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 | } | |
35c3ae5e | 609 | } |
3961f7c3 | 610 | |
cd99758b | 611 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
b5874f33 | 612 | ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq, |
90adf98d | 613 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "System power low", |
b5874f33 | 614 | power); |
3961f7c3 MB |
615 | if (ret != 0) { |
616 | dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n", | |
617 | irq, ret); | |
35c3ae5e | 618 | goto err_battery; |
3961f7c3 MB |
619 | } |
620 | ||
cd99758b | 621 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
b5874f33 | 622 | ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq, |
90adf98d | 623 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "Power source", |
b5874f33 | 624 | power); |
3961f7c3 MB |
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++) { | |
cd99758b MB |
632 | irq = wm831x_irq(wm831x, |
633 | platform_get_irq_byname(pdev, | |
634 | wm831x_bat_irqs[i])); | |
b5874f33 | 635 | ret = request_threaded_irq(irq, NULL, wm831x_bat_irq, |
90adf98d | 636 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
b5874f33 MB |
637 | wm831x_bat_irqs[i], |
638 | power); | |
3961f7c3 MB |
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 | ||
626b6cd5 BW |
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); | |
df561f66 | 668 | fallthrough; |
626b6cd5 BW |
669 | case -EPROBE_DEFER: |
670 | goto err_bat_irq; | |
671 | break; | |
672 | } | |
673 | ||
3961f7c3 MB |
674 | return ret; |
675 | ||
676 | err_bat_irq: | |
85a5965e | 677 | --i; |
3961f7c3 MB |
678 | for (; i >= 0; i--) { |
679 | irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]); | |
b5874f33 | 680 | free_irq(irq, power); |
3961f7c3 | 681 | } |
cd99758b | 682 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
b5874f33 | 683 | free_irq(irq, power); |
3961f7c3 | 684 | err_syslo: |
cd99758b | 685 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
b5874f33 | 686 | free_irq(irq, power); |
35c3ae5e MB |
687 | err_battery: |
688 | if (power->have_battery) | |
297d716f | 689 | power_supply_unregister(power->battery); |
3961f7c3 | 690 | err_usb: |
297d716f | 691 | power_supply_unregister(power->usb); |
3961f7c3 | 692 | err_wall: |
297d716f | 693 | power_supply_unregister(power->wall); |
c01576c8 | 694 | err: |
3961f7c3 MB |
695 | return ret; |
696 | } | |
697 | ||
415ec69f | 698 | static int wm831x_power_remove(struct platform_device *pdev) |
3961f7c3 MB |
699 | { |
700 | struct wm831x_power *wm831x_power = platform_get_drvdata(pdev); | |
cd99758b | 701 | struct wm831x *wm831x = wm831x_power->wm831x; |
3961f7c3 MB |
702 | int irq, i; |
703 | ||
626b6cd5 BW |
704 | if (wm831x_power->usb_phy) { |
705 | usb_unregister_notifier(wm831x_power->usb_phy, | |
706 | &wm831x_power->usb_notify); | |
707 | } | |
708 | ||
3961f7c3 | 709 | for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) { |
cd99758b MB |
710 | irq = wm831x_irq(wm831x, |
711 | platform_get_irq_byname(pdev, | |
712 | wm831x_bat_irqs[i])); | |
b5874f33 | 713 | free_irq(irq, wm831x_power); |
3961f7c3 MB |
714 | } |
715 | ||
cd99758b | 716 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
b5874f33 | 717 | free_irq(irq, wm831x_power); |
3961f7c3 | 718 | |
cd99758b | 719 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
b5874f33 | 720 | free_irq(irq, wm831x_power); |
3961f7c3 | 721 | |
35c3ae5e | 722 | if (wm831x_power->have_battery) |
297d716f KK |
723 | power_supply_unregister(wm831x_power->battery); |
724 | power_supply_unregister(wm831x_power->wall); | |
725 | power_supply_unregister(wm831x_power->usb); | |
3961f7c3 MB |
726 | return 0; |
727 | } | |
728 | ||
729 | static struct platform_driver wm831x_power_driver = { | |
730 | .probe = wm831x_power_probe, | |
28ea73f4 | 731 | .remove = wm831x_power_remove, |
3961f7c3 MB |
732 | .driver = { |
733 | .name = "wm831x-power", | |
734 | }, | |
735 | }; | |
736 | ||
300bac7f | 737 | module_platform_driver(wm831x_power_driver); |
3961f7c3 MB |
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"); |