projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
libceph: move r_reply_op_{len,result} into struct ceph_osd_req_op
[linux-2.6-block.git] / drivers / power / lp8788-charger.c
CommitLineData
98a27664
KM		 1/*
2 * TI LP8788 MFD - battery charger driver
3 *
4 * Copyright 2012 Texas Instruments
5 *
6 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13
14#include <linux/err.h>
15#include <linux/iio/consumer.h>
16#include <linux/interrupt.h>
17#include <linux/irqdomain.h>
18#include <linux/mfd/lp8788.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/power_supply.h>
22#include <linux/slab.h>
23#include <linux/workqueue.h>
24
25/* register address */
26#define LP8788_CHG_STATUS 0x07
27#define LP8788_CHG_IDCIN 0x13
28#define LP8788_CHG_IBATT 0x14
29#define LP8788_CHG_VTERM 0x15
30#define LP8788_CHG_EOC 0x16
31
32/* mask/shift bits */
33#define LP8788_CHG_INPUT_STATE_M 0x03 /* Addr 07h */
34#define LP8788_CHG_STATE_M 0x3C
35#define LP8788_CHG_STATE_S 2
36#define LP8788_NO_BATT_M BIT(6)
37#define LP8788_BAD_BATT_M BIT(7)
38#define LP8788_CHG_IBATT_M 0x1F /* Addr 14h */
39#define LP8788_CHG_VTERM_M 0x0F /* Addr 15h */
40#define LP8788_CHG_EOC_LEVEL_M 0x30 /* Addr 16h */
41#define LP8788_CHG_EOC_LEVEL_S 4
42#define LP8788_CHG_EOC_TIME_M 0x0E
43#define LP8788_CHG_EOC_TIME_S 1
44#define LP8788_CHG_EOC_MODE_M BIT(0)
45
46#define LP8788_CHARGER_NAME "charger"
47#define LP8788_BATTERY_NAME "main_batt"
48
49#define LP8788_CHG_START 0x11
50#define LP8788_CHG_END 0x1C
51
98a27664
KM		 52#define LP8788_ISEL_MAX 23
53#define LP8788_ISEL_STEP 50
54#define LP8788_VTERM_MIN 4100
55#define LP8788_VTERM_STEP 25
56#define LP8788_MAX_BATT_CAPACITY 100
57#define LP8788_MAX_CHG_IRQS 11
58
59enum lp8788_charging_state {
60 LP8788_OFF,
61 LP8788_WARM_UP,
62 LP8788_LOW_INPUT = 0x3,
63 LP8788_PRECHARGE,
64 LP8788_CC,
65 LP8788_CV,
66 LP8788_MAINTENANCE,
67 LP8788_BATTERY_FAULT,
68 LP8788_SYSTEM_SUPPORT = 0xC,
69 LP8788_HIGH_CURRENT = 0xF,
70 LP8788_MAX_CHG_STATE,
71};
72
73enum lp8788_charger_adc_sel {
74 LP8788_VBATT,
75 LP8788_BATT_TEMP,
76 LP8788_NUM_CHG_ADC,
77};
78
79enum lp8788_charger_input_state {
80 LP8788_SYSTEM_SUPPLY = 1,
81 LP8788_FULL_FUNCTION,
82};
83
84/*
85 * struct lp8788_chg_irq
86 * @which : lp8788 interrupt id
87 * @virq : Linux IRQ number from irq_domain
88 */
89struct lp8788_chg_irq {
90 enum lp8788_int_id which;
91 int virq;
92};
93
94/*
95 * struct lp8788_charger
96 * @lp : used for accessing the registers of mfd lp8788 device
97 * @charger : power supply driver for the battery charger
98 * @battery : power supply driver for the battery
99 * @charger_work : work queue for charger input interrupts
100 * @chan : iio channels for getting adc values
101 * eg) battery voltage, capacity and temperature
102 * @irqs : charger dedicated interrupts
103 * @num_irqs : total numbers of charger interrupts
104 * @pdata : charger platform specific data
105 */
106struct lp8788_charger {
107 struct lp8788 *lp;
297d716f
KK		 108 struct power_supply *charger;
109 struct power_supply *battery;
98a27664
KM		 110 struct work_struct charger_work;
111 struct iio_channel *chan[LP8788_NUM_CHG_ADC];
112 struct lp8788_chg_irq irqs[LP8788_MAX_CHG_IRQS];
113 int num_irqs;
114 struct lp8788_charger_platform_data *pdata;
115};
116
117static char *battery_supplied_to[] = {
118 LP8788_BATTERY_NAME,
119};
120
121static enum power_supply_property lp8788_charger_prop[] = {
122 POWER_SUPPLY_PROP_ONLINE,
123 POWER_SUPPLY_PROP_CURRENT_MAX,
124};
125
126static enum power_supply_property lp8788_battery_prop[] = {
127 POWER_SUPPLY_PROP_STATUS,
128 POWER_SUPPLY_PROP_HEALTH,
129 POWER_SUPPLY_PROP_PRESENT,
130 POWER_SUPPLY_PROP_VOLTAGE_NOW,
131 POWER_SUPPLY_PROP_CAPACITY,
132 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
133 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
134 POWER_SUPPLY_PROP_TEMP,
135};
136
137static bool lp8788_is_charger_detected(struct lp8788_charger *pchg)
138{
139 u8 data;
140
141 lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
142 data &= LP8788_CHG_INPUT_STATE_M;
143
144 return data == LP8788_SYSTEM_SUPPLY || data == LP8788_FULL_FUNCTION;
145}
146
147static int lp8788_charger_get_property(struct power_supply *psy,
148 enum power_supply_property psp,
149 union power_supply_propval *val)
150{
297d716f 151 struct lp8788_charger *pchg = dev_get_drvdata(psy->dev.parent);
98a27664
KM		 152 u8 read;
153
154 switch (psp) {
155 case POWER_SUPPLY_PROP_ONLINE:
156 val->intval = lp8788_is_charger_detected(pchg);
157 break;
158 case POWER_SUPPLY_PROP_CURRENT_MAX:
159 lp8788_read_byte(pchg->lp, LP8788_CHG_IDCIN, &read);
160 val->intval = LP8788_ISEL_STEP *
161 (min_t(int, read, LP8788_ISEL_MAX) + 1);
162 break;
163 default:
164 return -EINVAL;
165 }
166
167 return 0;
168}
169
170static int lp8788_get_battery_status(struct lp8788_charger *pchg,
171 union power_supply_propval *val)
172{
173 enum lp8788_charging_state state;
174 u8 data;
175 int ret;
176
177 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
178 if (ret)
179 return ret;
180
181 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
182 switch (state) {
183 case LP8788_OFF:
184 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
185 break;
186 case LP8788_PRECHARGE:
187 case LP8788_CC:
188 case LP8788_CV:
189 case LP8788_HIGH_CURRENT:
190 val->intval = POWER_SUPPLY_STATUS_CHARGING;
191 break;
192 case LP8788_MAINTENANCE:
193 val->intval = POWER_SUPPLY_STATUS_FULL;
194 break;
195 default:
196 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
197 break;
198 }
199
200 return 0;
201}
202
203static int lp8788_get_battery_health(struct lp8788_charger *pchg,
204 union power_supply_propval *val)
205{
206 u8 data;
207 int ret;
208
209 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
210 if (ret)
211 return ret;
212
213 if (data & LP8788_NO_BATT_M)
214 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
215 else if (data & LP8788_BAD_BATT_M)
216 val->intval = POWER_SUPPLY_HEALTH_DEAD;
217 else
218 val->intval = POWER_SUPPLY_HEALTH_GOOD;
219
220 return 0;
221}
222
223static int lp8788_get_battery_present(struct lp8788_charger *pchg,
224 union power_supply_propval *val)
225{
226 u8 data;
227 int ret;
228
229 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
230 if (ret)
231 return ret;
232
233 val->intval = !(data & LP8788_NO_BATT_M);
234 return 0;
235}
236
340968de 237static int lp8788_get_vbatt_adc(struct lp8788_charger *pchg, int *result)
98a27664
KM		 238{
239 struct iio_channel *channel = pchg->chan[LP8788_VBATT];
98a27664
KM		 240
241 if (!channel)
242 return -EINVAL;
243
340968de 244 return iio_read_channel_processed(channel, result);
98a27664
KM		 245}
246
247static int lp8788_get_battery_voltage(struct lp8788_charger *pchg,
248 union power_supply_propval *val)
249{
250 return lp8788_get_vbatt_adc(pchg, &val->intval);
251}
252
253static int lp8788_get_battery_capacity(struct lp8788_charger *pchg,
254 union power_supply_propval *val)
255{
256 struct lp8788 *lp = pchg->lp;
257 struct lp8788_charger_platform_data *pdata = pchg->pdata;
258 unsigned int max_vbatt;
340968de 259 int vbatt;
98a27664
KM		 260 enum lp8788_charging_state state;
261 u8 data;
262 int ret;
263
264 if (!pdata)
265 return -EINVAL;
266
267 max_vbatt = pdata->max_vbatt_mv;
268 if (max_vbatt == 0)
269 return -EINVAL;
270
271 ret = lp8788_read_byte(lp, LP8788_CHG_STATUS, &data);
272 if (ret)
273 return ret;
274
275 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
276
277 if (state == LP8788_MAINTENANCE) {
278 val->intval = LP8788_MAX_BATT_CAPACITY;
279 } else {
280 ret = lp8788_get_vbatt_adc(pchg, &vbatt);
281 if (ret)
282 return ret;
283
284 val->intval = (vbatt * LP8788_MAX_BATT_CAPACITY) / max_vbatt;
285 val->intval = min(val->intval, LP8788_MAX_BATT_CAPACITY);
286 }
287
288 return 0;
289}
290
291static int lp8788_get_battery_temperature(struct lp8788_charger *pchg,
292 union power_supply_propval *val)
293{
294 struct iio_channel *channel = pchg->chan[LP8788_BATT_TEMP];
340968de 295 int result;
98a27664
KM		 296 int ret;
297
298 if (!channel)
299 return -EINVAL;
300
340968de
KM		 301 ret = iio_read_channel_processed(channel, &result);
302 if (ret < 0)
98a27664
KM		 303 return -EINVAL;
304
305 /* unit: 0.1 'C */
340968de 306 val->intval = result * 10;
98a27664
KM		 307
308 return 0;
309}
310
311static int lp8788_get_battery_charging_current(struct lp8788_charger *pchg,
312 union power_supply_propval *val)
313{
314 u8 read;
315
316 lp8788_read_byte(pchg->lp, LP8788_CHG_IBATT, &read);
317 read &= LP8788_CHG_IBATT_M;
318 val->intval = LP8788_ISEL_STEP *
319 (min_t(int, read, LP8788_ISEL_MAX) + 1);
320
321 return 0;
322}
323
324static int lp8788_get_charging_termination_voltage(struct lp8788_charger *pchg,
325 union power_supply_propval *val)
326{
327 u8 read;
328
329 lp8788_read_byte(pchg->lp, LP8788_CHG_VTERM, &read);
330 read &= LP8788_CHG_VTERM_M;
331 val->intval = LP8788_VTERM_MIN + LP8788_VTERM_STEP * read;
332
333 return 0;
334}
335
336static int lp8788_battery_get_property(struct power_supply *psy,
337 enum power_supply_property psp,
338 union power_supply_propval *val)
339{
297d716f 340 struct lp8788_charger *pchg = dev_get_drvdata(psy->dev.parent);
98a27664
KM		 341
342 switch (psp) {
343 case POWER_SUPPLY_PROP_STATUS:
344 return lp8788_get_battery_status(pchg, val);
345 case POWER_SUPPLY_PROP_HEALTH:
346 return lp8788_get_battery_health(pchg, val);
347 case POWER_SUPPLY_PROP_PRESENT:
348 return lp8788_get_battery_present(pchg, val);
349 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
350 return lp8788_get_battery_voltage(pchg, val);
351 case POWER_SUPPLY_PROP_CAPACITY:
352 return lp8788_get_battery_capacity(pchg, val);
353 case POWER_SUPPLY_PROP_TEMP:
354 return lp8788_get_battery_temperature(pchg, val);
355 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
356 return lp8788_get_battery_charging_current(pchg, val);
357 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
358 return lp8788_get_charging_termination_voltage(pchg, val);
359 default:
360 return -EINVAL;
361 }
362}
363
364static inline bool lp8788_is_valid_charger_register(u8 addr)
365{
366 return addr >= LP8788_CHG_START && addr <= LP8788_CHG_END;
367}
368
d5c2b14c
KM		 369static int lp8788_update_charger_params(struct platform_device *pdev,
370 struct lp8788_charger *pchg)
98a27664
KM		 371{
372 struct lp8788 *lp = pchg->lp;
373 struct lp8788_charger_platform_data *pdata = pchg->pdata;
374 struct lp8788_chg_param *param;
375 int i;
376 int ret;
377
378 if (!pdata || !pdata->chg_params) {
d5c2b14c 379 dev_info(&pdev->dev, "skip updating charger parameters\n");
98a27664
KM		 380 return 0;
381 }
382
383 /* settting charging parameters */
384 for (i = 0; i < pdata->num_chg_params; i++) {
385 param = pdata->chg_params + i;
386
387 if (!param)
388 continue;
389
390 if (lp8788_is_valid_charger_register(param->addr)) {
391 ret = lp8788_write_byte(lp, param->addr, param->val);
392 if (ret)
393 return ret;
394 }
395 }
396
397 return 0;
398}
399
297d716f
KK		 400static const struct power_supply_desc lp8788_psy_charger_desc = {
401 .name = LP8788_CHARGER_NAME,
402 .type = POWER_SUPPLY_TYPE_MAINS,
403 .properties = lp8788_charger_prop,
404 .num_properties = ARRAY_SIZE(lp8788_charger_prop),
405 .get_property = lp8788_charger_get_property,
406};
407
408static const struct power_supply_desc lp8788_psy_battery_desc = {
409 .name = LP8788_BATTERY_NAME,
410 .type = POWER_SUPPLY_TYPE_BATTERY,
411 .properties = lp8788_battery_prop,
412 .num_properties = ARRAY_SIZE(lp8788_battery_prop),
413 .get_property = lp8788_battery_get_property,
414};
415
98a27664
KM		 416static int lp8788_psy_register(struct platform_device *pdev,
417 struct lp8788_charger *pchg)
418{
2dc9215d
KK		 419 struct power_supply_config charger_cfg = {};
420
2dc9215d
KK		 421 charger_cfg.supplied_to = battery_supplied_to;
422 charger_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to);
423
297d716f
KK		 424 pchg->charger = power_supply_register(&pdev->dev,
425 &lp8788_psy_charger_desc,
426 &charger_cfg);
427 if (IS_ERR(pchg->charger))
98a27664
KM		 428 return -EPERM;
429
297d716f
KK		 430 pchg->battery = power_supply_register(&pdev->dev,
431 &lp8788_psy_battery_desc, NULL);
432 if (IS_ERR(pchg->battery)) {
433 power_supply_unregister(pchg->charger);
98a27664 434 return -EPERM;
a7117f81 435 }
98a27664
KM		 436
437 return 0;
438}
439
440static void lp8788_psy_unregister(struct lp8788_charger *pchg)
441{
297d716f
KK		 442 power_supply_unregister(pchg->battery);
443 power_supply_unregister(pchg->charger);
98a27664
KM		 444}
445
446static void lp8788_charger_event(struct work_struct *work)
447{
448 struct lp8788_charger *pchg =
449 container_of(work, struct lp8788_charger, charger_work);
450 struct lp8788_charger_platform_data *pdata = pchg->pdata;
451 enum lp8788_charger_event event = lp8788_is_charger_detected(pchg);
452
453 pdata->charger_event(pchg->lp, event);
454}
455
456static bool lp8788_find_irq_id(struct lp8788_charger *pchg, int virq, int *id)
457{
9052768f 458 bool found = false;
98a27664
KM		 459 int i;
460
461 for (i = 0; i < pchg->num_irqs; i++) {
462 if (pchg->irqs[i].virq == virq) {
463 *id = pchg->irqs[i].which;
464 found = true;
465 break;
466 }
467 }
468
469 return found;
470}
471
472static irqreturn_t lp8788_charger_irq_thread(int virq, void *ptr)
473{
474 struct lp8788_charger *pchg = ptr;
475 struct lp8788_charger_platform_data *pdata = pchg->pdata;
476 int id = -1;
477
478 if (!lp8788_find_irq_id(pchg, virq, &id))
479 return IRQ_NONE;
480
481 switch (id) {
482 case LP8788_INT_CHG_INPUT_STATE:
483 case LP8788_INT_CHG_STATE:
484 case LP8788_INT_EOC:
485 case LP8788_INT_BATT_LOW:
486 case LP8788_INT_NO_BATT:
297d716f
KK		 487 power_supply_changed(pchg->charger);
488 power_supply_changed(pchg->battery);
98a27664
KM		 489 break;
490 default:
491 break;
492 }
493
494 /* report charger dectection event if used */
495 if (!pdata)
496 goto irq_handled;
497
498 if (pdata->charger_event && id == LP8788_INT_CHG_INPUT_STATE)
499 schedule_work(&pchg->charger_work);
500
501irq_handled:
502 return IRQ_HANDLED;
503}
504
505static int lp8788_set_irqs(struct platform_device *pdev,
506 struct lp8788_charger *pchg, const char *name)
507{
508 struct resource *r;
509 struct irq_domain *irqdm = pchg->lp->irqdm;
510 int irq_start;
511 int irq_end;
512 int virq;
513 int nr_irq;
514 int i;
515 int ret;
516
517 /* no error even if no irq resource */
518 r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, name);
519 if (!r)
520 return 0;
521
522 irq_start = r->start;
523 irq_end = r->end;
524
525 for (i = irq_start; i <= irq_end; i++) {
526 nr_irq = pchg->num_irqs;
527
528 virq = irq_create_mapping(irqdm, i);
529 pchg->irqs[nr_irq].virq = virq;
530 pchg->irqs[nr_irq].which = i;
531 pchg->num_irqs++;
532
533 ret = request_threaded_irq(virq, NULL,
534 lp8788_charger_irq_thread,
535 0, name, pchg);
536 if (ret)
537 break;
538 }
539
540 if (i <= irq_end)
541 goto err_free_irq;
542
543 return 0;
544
545err_free_irq:
546 for (i = 0; i < pchg->num_irqs; i++)
547 free_irq(pchg->irqs[i].virq, pchg);
548 return ret;
549}
550
551static int lp8788_irq_register(struct platform_device *pdev,
552 struct lp8788_charger *pchg)
553{
98a27664
KM		 554 const char *name[] = {
555 LP8788_CHG_IRQ, LP8788_PRSW_IRQ, LP8788_BATT_IRQ
556 };
557 int i;
558 int ret;
559
560 INIT_WORK(&pchg->charger_work, lp8788_charger_event);
561 pchg->num_irqs = 0;
562
563 for (i = 0; i < ARRAY_SIZE(name); i++) {
564 ret = lp8788_set_irqs(pdev, pchg, name[i]);
565 if (ret) {
d5c2b14c 566 dev_warn(&pdev->dev, "irq setup failed: %s\n", name[i]);
98a27664
KM		 567 return ret;
568 }
569 }
570
571 if (pchg->num_irqs > LP8788_MAX_CHG_IRQS) {
d5c2b14c 572 dev_err(&pdev->dev, "invalid total number of irqs: %d\n",
98a27664
KM		 573 pchg->num_irqs);
574 return -EINVAL;
575 }
576
577
578 return 0;
579}
580
581static void lp8788_irq_unregister(struct platform_device *pdev,
582 struct lp8788_charger *pchg)
583{
584 int i;
585 int irq;
586
587 for (i = 0; i < pchg->num_irqs; i++) {
588 irq = pchg->irqs[i].virq;
589 if (!irq)
590 continue;
591
592 free_irq(irq, pchg);
593 }
594}
595
5aa57f0a 596static void lp8788_setup_adc_channel(struct device *dev,
968a4783 597 struct lp8788_charger *pchg)
98a27664
KM		 598{
599 struct lp8788_charger_platform_data *pdata = pchg->pdata;
98a27664 600 struct iio_channel *chan;
98a27664
KM		 601
602 if (!pdata)
603 return;
604
08d816b8 605 /* ADC channel for battery voltage */
5aa57f0a 606 chan = iio_channel_get(dev, pdata->adc_vbatt);
08d816b8 607 pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan;
98a27664 608
08d816b8 609 /* ADC channel for battery temperature */
5aa57f0a 610 chan = iio_channel_get(dev, pdata->adc_batt_temp);
08d816b8 611 pchg->chan[LP8788_BATT_TEMP] = IS_ERR(chan) ? NULL : chan;
98a27664
KM		 612}
613
614static void lp8788_release_adc_channel(struct lp8788_charger *pchg)
615{
616 int i;
617
618 for (i = 0; i < LP8788_NUM_CHG_ADC; i++) {
619 if (!pchg->chan[i])
620 continue;
621
622 iio_channel_release(pchg->chan[i]);
623 pchg->chan[i] = NULL;
624 }
625}
626
627static ssize_t lp8788_show_charger_status(struct device *dev,
628 struct device_attribute *attr, char *buf)
629{
630 struct lp8788_charger *pchg = dev_get_drvdata(dev);
631 enum lp8788_charging_state state;
632 char *desc[LP8788_MAX_CHG_STATE] = {
633 [LP8788_OFF] = "CHARGER OFF",
634 [LP8788_WARM_UP] = "WARM UP",
635 [LP8788_LOW_INPUT] = "LOW INPUT STATE",
636 [LP8788_PRECHARGE] = "CHARGING - PRECHARGE",
637 [LP8788_CC] = "CHARGING - CC",
638 [LP8788_CV] = "CHARGING - CV",
639 [LP8788_MAINTENANCE] = "NO CHARGING - MAINTENANCE",
640 [LP8788_BATTERY_FAULT] = "BATTERY FAULT",
641 [LP8788_SYSTEM_SUPPORT] = "SYSTEM SUPPORT",
642 [LP8788_HIGH_CURRENT] = "HIGH CURRENT",
643 };
644 u8 data;
645
646 lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
647 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
648
4b44a1ed 649 return scnprintf(buf, PAGE_SIZE, "%s\n", desc[state]);
98a27664
KM		 650}
651
652static ssize_t lp8788_show_eoc_time(struct device *dev,
653 struct device_attribute *attr, char *buf)
654{
655 struct lp8788_charger *pchg = dev_get_drvdata(dev);
656 char *stime[] = { "400ms", "5min", "10min", "15min",
657 "20min", "25min", "30min" "No timeout" };
658 u8 val;
659
660 lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
661 val = (val & LP8788_CHG_EOC_TIME_M) >> LP8788_CHG_EOC_TIME_S;
662
4b44a1ed 663 return scnprintf(buf, PAGE_SIZE, "End Of Charge Time: %s\n",
98a27664
KM		 664 stime[val]);
665}
666
667static ssize_t lp8788_show_eoc_level(struct device *dev,
668 struct device_attribute *attr, char *buf)
669{
670 struct lp8788_charger *pchg = dev_get_drvdata(dev);
671 char *abs_level[] = { "25mA", "49mA", "75mA", "98mA" };
672 char *relative_level[] = { "5%", "10%", "15%", "20%" };
673 char *level;
674 u8 val;
675 u8 mode;
676
677 lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
678
679 mode = val & LP8788_CHG_EOC_MODE_M;
680 val = (val & LP8788_CHG_EOC_LEVEL_M) >> LP8788_CHG_EOC_LEVEL_S;
681 level = mode ? abs_level[val] : relative_level[val];
682
4b44a1ed 683 return scnprintf(buf, PAGE_SIZE, "End Of Charge Level: %s\n", level);
98a27664
KM		 684}
685
686static DEVICE_ATTR(charger_status, S_IRUSR, lp8788_show_charger_status, NULL);
687static DEVICE_ATTR(eoc_time, S_IRUSR, lp8788_show_eoc_time, NULL);
688static DEVICE_ATTR(eoc_level, S_IRUSR, lp8788_show_eoc_level, NULL);
689
690static struct attribute *lp8788_charger_attr[] = {
691 &dev_attr_charger_status.attr,
692 &dev_attr_eoc_time.attr,
693 &dev_attr_eoc_level.attr,
694 NULL,
695};
696
697static const struct attribute_group lp8788_attr_group = {
698 .attrs = lp8788_charger_attr,
699};
700
c8afa640 701static int lp8788_charger_probe(struct platform_device *pdev)
98a27664
KM		 702{
703 struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
704 struct lp8788_charger *pchg;
05ac539b 705 struct device *dev = &pdev->dev;
98a27664
KM		 706 int ret;
707
05ac539b 708 pchg = devm_kzalloc(dev, sizeof(struct lp8788_charger), GFP_KERNEL);
98a27664
KM		 709 if (!pchg)
710 return -ENOMEM;
711
712 pchg->lp = lp;
713 pchg->pdata = lp->pdata ? lp->pdata->chg_pdata : NULL;
714 platform_set_drvdata(pdev, pchg);
715
d5c2b14c 716 ret = lp8788_update_charger_params(pdev, pchg);
98a27664
KM		 717 if (ret)
718 return ret;
719
5aa57f0a 720 lp8788_setup_adc_channel(&pdev->dev, pchg);
98a27664
KM		 721
722 ret = lp8788_psy_register(pdev, pchg);
723 if (ret)
724 return ret;
725
726 ret = sysfs_create_group(&pdev->dev.kobj, &lp8788_attr_group);
727 if (ret) {
728 lp8788_psy_unregister(pchg);
729 return ret;
730 }
731
732 ret = lp8788_irq_register(pdev, pchg);
733 if (ret)
05ac539b 734 dev_warn(dev, "failed to register charger irq: %d\n", ret);
98a27664
KM		 735
736 return 0;
737}
738
415ec69f 739static int lp8788_charger_remove(struct platform_device *pdev)
98a27664
KM		 740{
741 struct lp8788_charger *pchg = platform_get_drvdata(pdev);
742
743 flush_work(&pchg->charger_work);
744 lp8788_irq_unregister(pdev, pchg);
745 sysfs_remove_group(&pdev->dev.kobj, &lp8788_attr_group);
746 lp8788_psy_unregister(pchg);
747 lp8788_release_adc_channel(pchg);
748
749 return 0;
750}
751
752static struct platform_driver lp8788_charger_driver = {
753 .probe = lp8788_charger_probe,
28ea73f4 754 .remove = lp8788_charger_remove,
98a27664
KM		 755 .driver = {
756 .name = LP8788_DEV_CHARGER,
98a27664
KM		 757 },
758};
759module_platform_driver(lp8788_charger_driver);
760
761MODULE_DESCRIPTION("TI LP8788 Charger Driver");
762MODULE_AUTHOR("Milo Kim");
763MODULE_LICENSE("GPL");
764MODULE_ALIAS("platform:lp8788-charger");
Linux 6.x block layer and io_uring tree(s)