Commit | Line | Data |
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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> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
626b6cd5 | 16 | #include <linux/usb/phy.h> |
3961f7c3 MB |
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 | ||
23 | struct wm831x_power { | |
24 | struct wm831x *wm831x; | |
297d716f KK |
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; | |
ccf8fa2d MB |
31 | char wall_name[20]; |
32 | char usb_name[20]; | |
33 | char battery_name[20]; | |
35c3ae5e | 34 | bool have_battery; |
626b6cd5 BW |
35 | struct usb_phy *usb_phy; |
36 | struct notifier_block usb_notify; | |
3961f7c3 MB |
37 | }; |
38 | ||
39 | static 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 | ||
56 | static 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 | * WALL Power | |
71 | *********************************************************************/ | |
72 | static int wm831x_wall_get_prop(struct power_supply *psy, | |
73 | enum power_supply_property psp, | |
74 | union power_supply_propval *val) | |
75 | { | |
297d716f | 76 | struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
3961f7c3 MB |
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 | ||
95 | static enum power_supply_property wm831x_wall_props[] = { | |
96 | POWER_SUPPLY_PROP_ONLINE, | |
97 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
98 | }; | |
99 | ||
100 | /********************************************************************* | |
101 | * USB Power | |
102 | *********************************************************************/ | |
103 | static int wm831x_usb_get_prop(struct power_supply *psy, | |
104 | enum power_supply_property psp, | |
105 | union power_supply_propval *val) | |
106 | { | |
297d716f | 107 | struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
3961f7c3 MB |
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 | ||
126 | static enum power_supply_property wm831x_usb_props[] = { | |
127 | POWER_SUPPLY_PROP_ONLINE, | |
128 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
129 | }; | |
130 | ||
626b6cd5 BW |
131 | /* In milliamps */ |
132 | static const unsigned int wm831x_usb_limits[] = { | |
133 | 0, | |
134 | 2, | |
135 | 100, | |
136 | 500, | |
137 | 900, | |
138 | 1500, | |
139 | 1800, | |
140 | 550, | |
141 | }; | |
142 | ||
143 | static 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 | /* Find the highest supported limit */ | |
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 | ||
3961f7c3 MB |
168 | /********************************************************************* |
169 | * Battery properties | |
170 | *********************************************************************/ | |
171 | ||
172 | struct chg_map { | |
173 | int val; | |
174 | int reg_val; | |
175 | }; | |
176 | ||
177 | static 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 | ||
184 | static 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 | ||
191 | static 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 | ||
210 | static 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 | ||
221 | static 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 | ||
240 | static 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 | ||
259 | static 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 | | |
3961f7c3 MB |
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 | ||
337 | static 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 | ||
371 | static 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 | ||
396 | static 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 | ||
435 | static int wm831x_bat_get_prop(struct power_supply *psy, | |
436 | enum power_supply_property psp, | |
437 | union power_supply_propval *val) | |
438 | { | |
297d716f | 439 | struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
3961f7c3 MB |
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 | ||
468 | static 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 | ||
476 | static 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 | ||
487 | static 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 | /* The battery charger is autonomous so we don't need to do | |
495 | * anything except kick user space */ | |
35c3ae5e | 496 | if (wm831x_power->have_battery) |
297d716f | 497 | power_supply_changed(wm831x_power->battery); |
3961f7c3 MB |
498 | |
499 | return IRQ_HANDLED; | |
500 | } | |
501 | ||
502 | ||
3961f7c3 MB |
503 | /********************************************************************* |
504 | * Initialisation | |
505 | *********************************************************************/ | |
506 | ||
507 | static 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 | /* Not much we can actually *do* but tell people for | |
513 | * posterity, we're probably about to run out of power. */ | |
514 | dev_crit(wm831x->dev, "SYSVDD under voltage\n"); | |
515 | ||
516 | return IRQ_HANDLED; | |
517 | } | |
518 | ||
519 | static 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 | ||
c26964ea | 526 | /* Just notify for everything - little harm in overnotifying. */ |
35c3ae5e | 527 | if (wm831x_power->have_battery) |
297d716f KK |
528 | power_supply_changed(wm831x_power->battery); |
529 | power_supply_changed(wm831x_power->usb); | |
530 | power_supply_changed(wm831x_power->wall); | |
3961f7c3 MB |
531 | |
532 | return IRQ_HANDLED; | |
533 | } | |
534 | ||
c8afa640 | 535 | static int wm831x_power_probe(struct platform_device *pdev) |
3961f7c3 MB |
536 | { |
537 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
ccf8fa2d | 538 | struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data; |
3961f7c3 | 539 | struct wm831x_power *power; |
3961f7c3 MB |
540 | int ret, irq, i; |
541 | ||
c01576c8 MB |
542 | power = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_power), |
543 | GFP_KERNEL); | |
3961f7c3 MB |
544 | if (power == NULL) |
545 | return -ENOMEM; | |
546 | ||
547 | power->wm831x = wm831x; | |
548 | platform_set_drvdata(pdev, power); | |
549 | ||
ccf8fa2d MB |
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 | ||
3961f7c3 | 566 | /* We ignore configuration failures since we can still read back |
c26964ea | 567 | * the status without enabling the charger. |
3961f7c3 MB |
568 | */ |
569 | wm831x_config_battery(wm831x); | |
3961f7c3 | 570 | |
297d716f KK |
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); | |
c01576c8 | 580 | goto err; |
297d716f | 581 | } |
3961f7c3 | 582 | |
297d716f KK |
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); | |
35c3ae5e | 591 | goto err_wall; |
297d716f | 592 | } |
35c3ae5e MB |
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) { | |
297d716f KK |
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 | } | |
35c3ae5e | 612 | } |
3961f7c3 | 613 | |
cd99758b | 614 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
b5874f33 | 615 | ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq, |
90adf98d | 616 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "System power low", |
b5874f33 | 617 | power); |
3961f7c3 MB |
618 | if (ret != 0) { |
619 | dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n", | |
620 | irq, ret); | |
35c3ae5e | 621 | goto err_battery; |
3961f7c3 MB |
622 | } |
623 | ||
cd99758b | 624 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
b5874f33 | 625 | ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq, |
90adf98d | 626 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "Power source", |
b5874f33 | 627 | power); |
3961f7c3 MB |
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++) { | |
cd99758b MB |
635 | irq = wm831x_irq(wm831x, |
636 | platform_get_irq_byname(pdev, | |
637 | wm831x_bat_irqs[i])); | |
b5874f33 | 638 | ret = request_threaded_irq(irq, NULL, wm831x_bat_irq, |
90adf98d | 639 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
b5874f33 MB |
640 | wm831x_bat_irqs[i], |
641 | power); | |
3961f7c3 MB |
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 | ||
626b6cd5 BW |
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 | /* ignore missing usb-phy, it's optional */ | |
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 | /* fall-through */ | |
672 | case -EPROBE_DEFER: | |
673 | goto err_bat_irq; | |
674 | break; | |
675 | } | |
676 | ||
3961f7c3 MB |
677 | return ret; |
678 | ||
679 | err_bat_irq: | |
85a5965e | 680 | --i; |
3961f7c3 MB |
681 | for (; i >= 0; i--) { |
682 | irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]); | |
b5874f33 | 683 | free_irq(irq, power); |
3961f7c3 | 684 | } |
cd99758b | 685 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
b5874f33 | 686 | free_irq(irq, power); |
3961f7c3 | 687 | err_syslo: |
cd99758b | 688 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
b5874f33 | 689 | free_irq(irq, power); |
35c3ae5e MB |
690 | err_battery: |
691 | if (power->have_battery) | |
297d716f | 692 | power_supply_unregister(power->battery); |
3961f7c3 | 693 | err_usb: |
297d716f | 694 | power_supply_unregister(power->usb); |
3961f7c3 | 695 | err_wall: |
297d716f | 696 | power_supply_unregister(power->wall); |
c01576c8 | 697 | err: |
3961f7c3 MB |
698 | return ret; |
699 | } | |
700 | ||
415ec69f | 701 | static int wm831x_power_remove(struct platform_device *pdev) |
3961f7c3 MB |
702 | { |
703 | struct wm831x_power *wm831x_power = platform_get_drvdata(pdev); | |
cd99758b | 704 | struct wm831x *wm831x = wm831x_power->wm831x; |
3961f7c3 MB |
705 | int irq, i; |
706 | ||
626b6cd5 BW |
707 | if (wm831x_power->usb_phy) { |
708 | usb_unregister_notifier(wm831x_power->usb_phy, | |
709 | &wm831x_power->usb_notify); | |
710 | } | |
711 | ||
3961f7c3 | 712 | for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) { |
cd99758b MB |
713 | irq = wm831x_irq(wm831x, |
714 | platform_get_irq_byname(pdev, | |
715 | wm831x_bat_irqs[i])); | |
b5874f33 | 716 | free_irq(irq, wm831x_power); |
3961f7c3 MB |
717 | } |
718 | ||
cd99758b | 719 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
b5874f33 | 720 | free_irq(irq, wm831x_power); |
3961f7c3 | 721 | |
cd99758b | 722 | irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
b5874f33 | 723 | free_irq(irq, wm831x_power); |
3961f7c3 | 724 | |
35c3ae5e | 725 | if (wm831x_power->have_battery) |
297d716f KK |
726 | power_supply_unregister(wm831x_power->battery); |
727 | power_supply_unregister(wm831x_power->wall); | |
728 | power_supply_unregister(wm831x_power->usb); | |
3961f7c3 MB |
729 | return 0; |
730 | } | |
731 | ||
732 | static struct platform_driver wm831x_power_driver = { | |
733 | .probe = wm831x_power_probe, | |
28ea73f4 | 734 | .remove = wm831x_power_remove, |
3961f7c3 MB |
735 | .driver = { |
736 | .name = "wm831x-power", | |
737 | }, | |
738 | }; | |
739 | ||
300bac7f | 740 | module_platform_driver(wm831x_power_driver); |
3961f7c3 MB |
741 | |
742 | MODULE_DESCRIPTION("Power supply driver for WM831x PMICs"); | |
743 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
744 | MODULE_LICENSE("GPL"); | |
745 | MODULE_ALIAS("platform:wm831x-power"); |