1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Power supply driver for the Active-semi ACT8945A PMIC |
4 | * |
5 | * Copyright (C) 2015 Atmel Corporation |
6 | * |
7 | * Author: Wenyou Yang <wenyou.yang@atmel.com> |
8 | */ |
9 | #include <linux/interrupt.h> |
10 | #include <linux/module.h> |
11 | #include <linux/of.h> |
12 | #include <linux/of_irq.h> |
13 | #include <linux/platform_device.h> |
14 | #include <linux/power_supply.h> |
15 | #include <linux/regmap.h> |
16 | #include <linux/gpio/consumer.h> |
17 | |
18 | static const char *act8945a_charger_model = "ACT8945A" ; |
19 | static const char *act8945a_charger_manufacturer = "Active-semi" ; |
20 | |
21 | /* |
22 | * ACT8945A Charger Register Map |
23 | */ |
24 | |
25 | /* 0x70: Reserved */ |
26 | #define ACT8945A_APCH_CFG 0x71 |
27 | #define ACT8945A_APCH_STATUS 0x78 |
28 | #define ACT8945A_APCH_CTRL 0x79 |
29 | #define ACT8945A_APCH_STATE 0x7A |
30 | |
31 | /* ACT8945A_APCH_CFG */ |
32 | #define APCH_CFG_OVPSET (0x3 << 0) |
33 | #define APCH_CFG_OVPSET_6V6 (0x0 << 0) |
34 | #define APCH_CFG_OVPSET_7V (0x1 << 0) |
35 | #define APCH_CFG_OVPSET_7V5 (0x2 << 0) |
36 | #define APCH_CFG_OVPSET_8V (0x3 << 0) |
37 | #define APCH_CFG_PRETIMO (0x3 << 2) |
38 | #define APCH_CFG_PRETIMO_40_MIN (0x0 << 2) |
39 | #define APCH_CFG_PRETIMO_60_MIN (0x1 << 2) |
40 | #define APCH_CFG_PRETIMO_80_MIN (0x2 << 2) |
41 | #define APCH_CFG_PRETIMO_DISABLED (0x3 << 2) |
42 | #define APCH_CFG_TOTTIMO (0x3 << 4) |
43 | #define APCH_CFG_TOTTIMO_3_HOUR (0x0 << 4) |
44 | #define APCH_CFG_TOTTIMO_4_HOUR (0x1 << 4) |
45 | #define APCH_CFG_TOTTIMO_5_HOUR (0x2 << 4) |
46 | #define APCH_CFG_TOTTIMO_DISABLED (0x3 << 4) |
47 | #define APCH_CFG_SUSCHG (0x1 << 7) |
48 | |
49 | #define APCH_STATUS_CHGDAT BIT(0) |
50 | #define APCH_STATUS_INDAT BIT(1) |
51 | #define APCH_STATUS_TEMPDAT BIT(2) |
52 | #define APCH_STATUS_TIMRDAT BIT(3) |
53 | #define APCH_STATUS_CHGSTAT BIT(4) |
54 | #define APCH_STATUS_INSTAT BIT(5) |
55 | #define APCH_STATUS_TEMPSTAT BIT(6) |
56 | #define APCH_STATUS_TIMRSTAT BIT(7) |
57 | |
58 | #define APCH_CTRL_CHGEOCOUT BIT(0) |
59 | #define APCH_CTRL_INDIS BIT(1) |
60 | #define APCH_CTRL_TEMPOUT BIT(2) |
61 | #define APCH_CTRL_TIMRPRE BIT(3) |
62 | #define APCH_CTRL_CHGEOCIN BIT(4) |
63 | #define APCH_CTRL_INCON BIT(5) |
64 | #define APCH_CTRL_TEMPIN BIT(6) |
65 | #define APCH_CTRL_TIMRTOT BIT(7) |
66 | |
67 | #define APCH_STATE_ACINSTAT (0x1 << 1) |
68 | #define APCH_STATE_CSTATE (0x3 << 4) |
69 | #define APCH_STATE_CSTATE_SHIFT 4 |
70 | #define APCH_STATE_CSTATE_DISABLED 0x00 |
71 | #define APCH_STATE_CSTATE_EOC 0x01 |
72 | #define APCH_STATE_CSTATE_FAST 0x02 |
73 | #define APCH_STATE_CSTATE_PRE 0x03 |
74 | |
75 | struct act8945a_charger { |
76 | struct power_supply *psy; |
77 | struct power_supply_desc desc; |
78 | struct regmap *regmap; |
79 | struct work_struct work; |
80 | |
81 | bool init_done; |
82 | struct gpio_desc *lbo_gpio; |
83 | struct gpio_desc *chglev_gpio; |
84 | }; |
85 | |
86 | static int act8945a_get_charger_state(struct regmap *regmap, int *val) |
87 | { |
88 | int ret; |
89 | unsigned int status, state; |
90 | |
91 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATUS, val: &status); |
92 | if (ret < 0) |
93 | return ret; |
94 | |
95 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATE, val: &state); |
96 | if (ret < 0) |
97 | return ret; |
98 | |
99 | state &= APCH_STATE_CSTATE; |
100 | state >>= APCH_STATE_CSTATE_SHIFT; |
101 | |
102 | switch (state) { |
103 | case APCH_STATE_CSTATE_PRE: |
104 | case APCH_STATE_CSTATE_FAST: |
105 | *val = POWER_SUPPLY_STATUS_CHARGING; |
106 | break; |
107 | case APCH_STATE_CSTATE_EOC: |
108 | if (status & APCH_STATUS_CHGDAT) |
109 | *val = POWER_SUPPLY_STATUS_FULL; |
110 | else |
111 | *val = POWER_SUPPLY_STATUS_CHARGING; |
112 | break; |
113 | case APCH_STATE_CSTATE_DISABLED: |
114 | default: |
115 | if (!(status & APCH_STATUS_INDAT)) |
116 | *val = POWER_SUPPLY_STATUS_DISCHARGING; |
117 | else |
118 | *val = POWER_SUPPLY_STATUS_NOT_CHARGING; |
119 | break; |
120 | } |
121 | |
122 | return 0; |
123 | } |
124 | |
125 | static int act8945a_get_charge_type(struct regmap *regmap, int *val) |
126 | { |
127 | int ret; |
128 | unsigned int status, state; |
129 | |
130 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATUS, val: &status); |
131 | if (ret < 0) |
132 | return ret; |
133 | |
134 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATE, val: &state); |
135 | if (ret < 0) |
136 | return ret; |
137 | |
138 | state &= APCH_STATE_CSTATE; |
139 | state >>= APCH_STATE_CSTATE_SHIFT; |
140 | |
141 | switch (state) { |
142 | case APCH_STATE_CSTATE_PRE: |
143 | *val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; |
144 | break; |
145 | case APCH_STATE_CSTATE_FAST: |
146 | *val = POWER_SUPPLY_CHARGE_TYPE_FAST; |
147 | break; |
148 | case APCH_STATE_CSTATE_EOC: |
149 | *val = POWER_SUPPLY_CHARGE_TYPE_NONE; |
150 | break; |
151 | case APCH_STATE_CSTATE_DISABLED: |
152 | default: |
153 | if (!(status & APCH_STATUS_INDAT)) |
154 | *val = POWER_SUPPLY_CHARGE_TYPE_NONE; |
155 | else |
156 | *val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; |
157 | break; |
158 | } |
159 | |
160 | return 0; |
161 | } |
162 | |
163 | static int act8945a_get_battery_health(struct regmap *regmap, int *val) |
164 | { |
165 | int ret; |
166 | unsigned int status, state, config; |
167 | |
168 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATUS, val: &status); |
169 | if (ret < 0) |
170 | return ret; |
171 | |
172 | ret = regmap_read(map: regmap, ACT8945A_APCH_CFG, val: &config); |
173 | if (ret < 0) |
174 | return ret; |
175 | |
176 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATE, val: &state); |
177 | if (ret < 0) |
178 | return ret; |
179 | |
180 | state &= APCH_STATE_CSTATE; |
181 | state >>= APCH_STATE_CSTATE_SHIFT; |
182 | |
183 | switch (state) { |
184 | case APCH_STATE_CSTATE_DISABLED: |
185 | if (config & APCH_CFG_SUSCHG) { |
186 | *val = POWER_SUPPLY_HEALTH_UNKNOWN; |
187 | } else if (status & APCH_STATUS_INDAT) { |
188 | if (!(status & APCH_STATUS_TEMPDAT)) |
189 | *val = POWER_SUPPLY_HEALTH_OVERHEAT; |
190 | else if (status & APCH_STATUS_TIMRDAT) |
191 | *val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; |
192 | else |
193 | *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
194 | } else { |
195 | *val = POWER_SUPPLY_HEALTH_GOOD; |
196 | } |
197 | break; |
198 | case APCH_STATE_CSTATE_PRE: |
199 | case APCH_STATE_CSTATE_FAST: |
200 | case APCH_STATE_CSTATE_EOC: |
201 | default: |
202 | *val = POWER_SUPPLY_HEALTH_GOOD; |
203 | break; |
204 | } |
205 | |
206 | return 0; |
207 | } |
208 | |
209 | static int act8945a_get_capacity_level(struct act8945a_charger *charger, |
210 | struct regmap *regmap, int *val) |
211 | { |
212 | int ret; |
213 | unsigned int status, state, config; |
214 | int lbo_level = gpiod_get_value(desc: charger->lbo_gpio); |
215 | |
216 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATUS, val: &status); |
217 | if (ret < 0) |
218 | return ret; |
219 | |
220 | ret = regmap_read(map: regmap, ACT8945A_APCH_CFG, val: &config); |
221 | if (ret < 0) |
222 | return ret; |
223 | |
224 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATE, val: &state); |
225 | if (ret < 0) |
226 | return ret; |
227 | |
228 | state &= APCH_STATE_CSTATE; |
229 | state >>= APCH_STATE_CSTATE_SHIFT; |
230 | |
231 | switch (state) { |
232 | case APCH_STATE_CSTATE_PRE: |
233 | *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
234 | break; |
235 | case APCH_STATE_CSTATE_FAST: |
236 | if (lbo_level) |
237 | *val = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; |
238 | else |
239 | *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
240 | break; |
241 | case APCH_STATE_CSTATE_EOC: |
242 | if (status & APCH_STATUS_CHGDAT) |
243 | *val = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
244 | else |
245 | *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
246 | break; |
247 | case APCH_STATE_CSTATE_DISABLED: |
248 | default: |
249 | if (config & APCH_CFG_SUSCHG) { |
250 | *val = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; |
251 | } else { |
252 | *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
253 | if (!(status & APCH_STATUS_INDAT)) { |
254 | if (!lbo_level) |
255 | *val = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
256 | } |
257 | } |
258 | break; |
259 | } |
260 | |
261 | return 0; |
262 | } |
263 | |
264 | #define MAX_CURRENT_USB_HIGH 450000 |
265 | #define MAX_CURRENT_USB_LOW 90000 |
266 | #define MAX_CURRENT_USB_PRE 45000 |
267 | /* |
268 | * Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205 |
269 | * Riset = 2.43K |
270 | */ |
271 | #define MAX_CURRENT_AC_HIGH 886527 |
272 | #define MAX_CURRENT_AC_LOW 117305 |
273 | #define MAX_CURRENT_AC_HIGH_PRE 88653 |
274 | #define MAX_CURRENT_AC_LOW_PRE 11731 |
275 | |
276 | static int act8945a_get_current_max(struct act8945a_charger *charger, |
277 | struct regmap *regmap, int *val) |
278 | { |
279 | int ret; |
280 | unsigned int status, state; |
281 | unsigned int acin_state; |
282 | int chgin_level = gpiod_get_value(desc: charger->chglev_gpio); |
283 | |
284 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATUS, val: &status); |
285 | if (ret < 0) |
286 | return ret; |
287 | |
288 | ret = regmap_read(map: regmap, ACT8945A_APCH_STATE, val: &state); |
289 | if (ret < 0) |
290 | return ret; |
291 | |
292 | acin_state = (state & APCH_STATE_ACINSTAT) >> 1; |
293 | |
294 | state &= APCH_STATE_CSTATE; |
295 | state >>= APCH_STATE_CSTATE_SHIFT; |
296 | |
297 | switch (state) { |
298 | case APCH_STATE_CSTATE_PRE: |
299 | if (acin_state) { |
300 | if (chgin_level) |
301 | *val = MAX_CURRENT_AC_HIGH_PRE; |
302 | else |
303 | *val = MAX_CURRENT_AC_LOW_PRE; |
304 | } else { |
305 | *val = MAX_CURRENT_USB_PRE; |
306 | } |
307 | break; |
308 | case APCH_STATE_CSTATE_FAST: |
309 | if (acin_state) { |
310 | if (chgin_level) |
311 | *val = MAX_CURRENT_AC_HIGH; |
312 | else |
313 | *val = MAX_CURRENT_AC_LOW; |
314 | } else { |
315 | if (chgin_level) |
316 | *val = MAX_CURRENT_USB_HIGH; |
317 | else |
318 | *val = MAX_CURRENT_USB_LOW; |
319 | } |
320 | break; |
321 | case APCH_STATE_CSTATE_EOC: |
322 | case APCH_STATE_CSTATE_DISABLED: |
323 | default: |
324 | *val = 0; |
325 | break; |
326 | } |
327 | |
328 | return 0; |
329 | } |
330 | |
331 | static enum power_supply_property act8945a_charger_props[] = { |
332 | POWER_SUPPLY_PROP_STATUS, |
333 | POWER_SUPPLY_PROP_CHARGE_TYPE, |
334 | POWER_SUPPLY_PROP_TECHNOLOGY, |
335 | POWER_SUPPLY_PROP_HEALTH, |
336 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
337 | POWER_SUPPLY_PROP_CURRENT_MAX, |
338 | POWER_SUPPLY_PROP_MODEL_NAME, |
339 | POWER_SUPPLY_PROP_MANUFACTURER |
340 | }; |
341 | |
342 | static int act8945a_charger_get_property(struct power_supply *psy, |
343 | enum power_supply_property prop, |
344 | union power_supply_propval *val) |
345 | { |
346 | struct act8945a_charger *charger = power_supply_get_drvdata(psy); |
347 | struct regmap *regmap = charger->regmap; |
348 | int ret = 0; |
349 | |
350 | switch (prop) { |
351 | case POWER_SUPPLY_PROP_STATUS: |
352 | ret = act8945a_get_charger_state(regmap, val: &val->intval); |
353 | break; |
354 | case POWER_SUPPLY_PROP_CHARGE_TYPE: |
355 | ret = act8945a_get_charge_type(regmap, val: &val->intval); |
356 | break; |
357 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
358 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
359 | break; |
360 | case POWER_SUPPLY_PROP_HEALTH: |
361 | ret = act8945a_get_battery_health(regmap, val: &val->intval); |
362 | break; |
363 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
364 | ret = act8945a_get_capacity_level(charger, |
365 | regmap, val: &val->intval); |
366 | break; |
367 | case POWER_SUPPLY_PROP_CURRENT_MAX: |
368 | ret = act8945a_get_current_max(charger, |
369 | regmap, val: &val->intval); |
370 | break; |
371 | case POWER_SUPPLY_PROP_MODEL_NAME: |
372 | val->strval = act8945a_charger_model; |
373 | break; |
374 | case POWER_SUPPLY_PROP_MANUFACTURER: |
375 | val->strval = act8945a_charger_manufacturer; |
376 | break; |
377 | default: |
378 | return -EINVAL; |
379 | } |
380 | |
381 | return ret; |
382 | } |
383 | |
384 | static int act8945a_enable_interrupt(struct act8945a_charger *charger) |
385 | { |
386 | struct regmap *regmap = charger->regmap; |
387 | unsigned char ctrl; |
388 | int ret; |
389 | |
390 | ctrl = APCH_CTRL_CHGEOCOUT | APCH_CTRL_CHGEOCIN | |
391 | APCH_CTRL_INDIS | APCH_CTRL_INCON | |
392 | APCH_CTRL_TEMPOUT | APCH_CTRL_TEMPIN | |
393 | APCH_CTRL_TIMRPRE | APCH_CTRL_TIMRTOT; |
394 | ret = regmap_write(map: regmap, ACT8945A_APCH_CTRL, val: ctrl); |
395 | if (ret) |
396 | return ret; |
397 | |
398 | ctrl = APCH_STATUS_CHGSTAT | APCH_STATUS_INSTAT | |
399 | APCH_STATUS_TEMPSTAT | APCH_STATUS_TIMRSTAT; |
400 | ret = regmap_write(map: regmap, ACT8945A_APCH_STATUS, val: ctrl); |
401 | if (ret) |
402 | return ret; |
403 | |
404 | return 0; |
405 | } |
406 | |
407 | static unsigned int act8945a_set_supply_type(struct act8945a_charger *charger, |
408 | unsigned int *type) |
409 | { |
410 | unsigned int status, state; |
411 | int ret; |
412 | |
413 | ret = regmap_read(map: charger->regmap, ACT8945A_APCH_STATUS, val: &status); |
414 | if (ret < 0) |
415 | return ret; |
416 | |
417 | ret = regmap_read(map: charger->regmap, ACT8945A_APCH_STATE, val: &state); |
418 | if (ret < 0) |
419 | return ret; |
420 | |
421 | if (status & APCH_STATUS_INDAT) { |
422 | if (state & APCH_STATE_ACINSTAT) |
423 | *type = POWER_SUPPLY_TYPE_MAINS; |
424 | else |
425 | *type = POWER_SUPPLY_TYPE_USB; |
426 | } else { |
427 | *type = POWER_SUPPLY_TYPE_BATTERY; |
428 | } |
429 | |
430 | return 0; |
431 | } |
432 | |
433 | static void act8945a_work(struct work_struct *work) |
434 | { |
435 | struct act8945a_charger *charger = |
436 | container_of(work, struct act8945a_charger, work); |
437 | |
438 | act8945a_set_supply_type(charger, type: &charger->desc.type); |
439 | |
440 | power_supply_changed(psy: charger->psy); |
441 | } |
442 | |
443 | static irqreturn_t act8945a_status_changed(int irq, void *dev_id) |
444 | { |
445 | struct act8945a_charger *charger = dev_id; |
446 | |
447 | if (charger->init_done) |
448 | schedule_work(work: &charger->work); |
449 | |
450 | return IRQ_HANDLED; |
451 | } |
452 | |
453 | #define DEFAULT_TOTAL_TIME_OUT 3 |
454 | #define DEFAULT_PRE_TIME_OUT 40 |
455 | #define DEFAULT_INPUT_OVP_THRESHOLD 6600 |
456 | |
457 | static int act8945a_charger_config(struct device *dev, |
458 | struct act8945a_charger *charger) |
459 | { |
460 | struct device_node *np = dev->of_node; |
461 | struct regmap *regmap = charger->regmap; |
462 | |
463 | u32 total_time_out; |
464 | u32 pre_time_out; |
465 | u32 input_voltage_threshold; |
466 | int err, ret; |
467 | |
468 | unsigned int tmp; |
469 | unsigned int value = 0; |
470 | |
471 | if (!np) { |
472 | dev_err(dev, "no charger of node\n" ); |
473 | return -EINVAL; |
474 | } |
475 | |
476 | ret = regmap_read(map: regmap, ACT8945A_APCH_CFG, val: &tmp); |
477 | if (ret) |
478 | return ret; |
479 | |
480 | if (tmp & APCH_CFG_SUSCHG) { |
481 | value |= APCH_CFG_SUSCHG; |
482 | dev_info(dev, "have been suspended\n" ); |
483 | } |
484 | |
485 | charger->lbo_gpio = devm_gpiod_get_optional(dev, con_id: "active-semi,lbo" , |
486 | flags: GPIOD_IN); |
487 | if (IS_ERR(ptr: charger->lbo_gpio)) { |
488 | err = PTR_ERR(ptr: charger->lbo_gpio); |
489 | dev_err(dev, "unable to claim gpio \"lbo\": %d\n" , err); |
490 | return err; |
491 | } |
492 | |
493 | ret = devm_request_irq(dev, irq: gpiod_to_irq(desc: charger->lbo_gpio), |
494 | handler: act8945a_status_changed, |
495 | irqflags: (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING), |
496 | devname: "act8945a_lbo_detect" , dev_id: charger); |
497 | if (ret) |
498 | dev_info(dev, "failed to request gpio \"lbo\" IRQ\n" ); |
499 | |
500 | charger->chglev_gpio = devm_gpiod_get_optional(dev, |
501 | con_id: "active-semi,chglev" , |
502 | flags: GPIOD_IN); |
503 | if (IS_ERR(ptr: charger->chglev_gpio)) { |
504 | err = PTR_ERR(ptr: charger->chglev_gpio); |
505 | dev_err(dev, "unable to claim gpio \"chglev\": %d\n" , err); |
506 | return err; |
507 | } |
508 | |
509 | if (of_property_read_u32(np, |
510 | propname: "active-semi,input-voltage-threshold-microvolt" , |
511 | out_value: &input_voltage_threshold)) |
512 | input_voltage_threshold = DEFAULT_INPUT_OVP_THRESHOLD; |
513 | |
514 | if (of_property_read_u32(np, |
515 | propname: "active-semi,precondition-timeout" , |
516 | out_value: &pre_time_out)) |
517 | pre_time_out = DEFAULT_PRE_TIME_OUT; |
518 | |
519 | if (of_property_read_u32(np, propname: "active-semi,total-timeout" , |
520 | out_value: &total_time_out)) |
521 | total_time_out = DEFAULT_TOTAL_TIME_OUT; |
522 | |
523 | switch (input_voltage_threshold) { |
524 | case 8000: |
525 | value |= APCH_CFG_OVPSET_8V; |
526 | break; |
527 | case 7500: |
528 | value |= APCH_CFG_OVPSET_7V5; |
529 | break; |
530 | case 7000: |
531 | value |= APCH_CFG_OVPSET_7V; |
532 | break; |
533 | case 6600: |
534 | default: |
535 | value |= APCH_CFG_OVPSET_6V6; |
536 | break; |
537 | } |
538 | |
539 | switch (pre_time_out) { |
540 | case 60: |
541 | value |= APCH_CFG_PRETIMO_60_MIN; |
542 | break; |
543 | case 80: |
544 | value |= APCH_CFG_PRETIMO_80_MIN; |
545 | break; |
546 | case 0: |
547 | value |= APCH_CFG_PRETIMO_DISABLED; |
548 | break; |
549 | case 40: |
550 | default: |
551 | value |= APCH_CFG_PRETIMO_40_MIN; |
552 | break; |
553 | } |
554 | |
555 | switch (total_time_out) { |
556 | case 4: |
557 | value |= APCH_CFG_TOTTIMO_4_HOUR; |
558 | break; |
559 | case 5: |
560 | value |= APCH_CFG_TOTTIMO_5_HOUR; |
561 | break; |
562 | case 0: |
563 | value |= APCH_CFG_TOTTIMO_DISABLED; |
564 | break; |
565 | case 3: |
566 | default: |
567 | value |= APCH_CFG_TOTTIMO_3_HOUR; |
568 | break; |
569 | } |
570 | |
571 | return regmap_write(map: regmap, ACT8945A_APCH_CFG, val: value); |
572 | } |
573 | |
574 | static int act8945a_charger_probe(struct platform_device *pdev) |
575 | { |
576 | struct act8945a_charger *charger; |
577 | struct power_supply_config psy_cfg = {}; |
578 | int irq, ret; |
579 | |
580 | charger = devm_kzalloc(dev: &pdev->dev, size: sizeof(*charger), GFP_KERNEL); |
581 | if (!charger) |
582 | return -ENOMEM; |
583 | |
584 | charger->regmap = dev_get_regmap(dev: pdev->dev.parent, NULL); |
585 | if (!charger->regmap) { |
586 | dev_err(&pdev->dev, "Parent did not provide regmap\n" ); |
587 | return -EINVAL; |
588 | } |
589 | |
590 | ret = act8945a_charger_config(dev: &pdev->dev, charger); |
591 | if (ret) |
592 | return ret; |
593 | |
594 | irq = of_irq_get(dev: pdev->dev.of_node, index: 0); |
595 | if (irq <= 0) { |
596 | dev_err(&pdev->dev, "failed to find IRQ number\n" ); |
597 | return irq ?: -ENXIO; |
598 | } |
599 | |
600 | ret = devm_request_irq(dev: &pdev->dev, irq, handler: act8945a_status_changed, |
601 | IRQF_TRIGGER_FALLING, devname: "act8945a_interrupt" , |
602 | dev_id: charger); |
603 | if (ret) { |
604 | dev_err(&pdev->dev, "failed to request nIRQ pin IRQ\n" ); |
605 | return ret; |
606 | } |
607 | |
608 | charger->desc.name = "act8945a-charger" ; |
609 | charger->desc.get_property = act8945a_charger_get_property; |
610 | charger->desc.properties = act8945a_charger_props; |
611 | charger->desc.num_properties = ARRAY_SIZE(act8945a_charger_props); |
612 | |
613 | ret = act8945a_set_supply_type(charger, type: &charger->desc.type); |
614 | if (ret) |
615 | return -EINVAL; |
616 | |
617 | psy_cfg.of_node = pdev->dev.of_node; |
618 | psy_cfg.drv_data = charger; |
619 | |
620 | charger->psy = devm_power_supply_register(parent: &pdev->dev, |
621 | desc: &charger->desc, |
622 | cfg: &psy_cfg); |
623 | if (IS_ERR(ptr: charger->psy)) { |
624 | dev_err(&pdev->dev, "failed to register power supply\n" ); |
625 | return PTR_ERR(ptr: charger->psy); |
626 | } |
627 | |
628 | platform_set_drvdata(pdev, data: charger); |
629 | |
630 | INIT_WORK(&charger->work, act8945a_work); |
631 | |
632 | ret = act8945a_enable_interrupt(charger); |
633 | if (ret) |
634 | return -EIO; |
635 | |
636 | charger->init_done = true; |
637 | |
638 | return 0; |
639 | } |
640 | |
641 | static void act8945a_charger_remove(struct platform_device *pdev) |
642 | { |
643 | struct act8945a_charger *charger = platform_get_drvdata(pdev); |
644 | |
645 | charger->init_done = false; |
646 | cancel_work_sync(work: &charger->work); |
647 | } |
648 | |
649 | static struct platform_driver act8945a_charger_driver = { |
650 | .driver = { |
651 | .name = "act8945a-charger" , |
652 | }, |
653 | .probe = act8945a_charger_probe, |
654 | .remove_new = act8945a_charger_remove, |
655 | }; |
656 | module_platform_driver(act8945a_charger_driver); |
657 | |
658 | MODULE_DESCRIPTION("Active-semi ACT8945A ActivePath charger driver" ); |
659 | MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>" ); |
660 | MODULE_LICENSE("GPL" ); |
661 | |