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path: root/drivers/power/lp8788-charger.c
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-rw-r--r--drivers/power/lp8788-charger.c795
1 files changed, 795 insertions, 0 deletions
diff --git a/drivers/power/lp8788-charger.c b/drivers/power/lp8788-charger.c
new file mode 100644
index 00000000000..e852d12cd07
--- /dev/null
+++ b/drivers/power/lp8788-charger.c
@@ -0,0 +1,795 @@
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
52#define LP8788_BUF_SIZE 40
53#define LP8788_ISEL_MAX 23
54#define LP8788_ISEL_STEP 50
55#define LP8788_VTERM_MIN 4100
56#define LP8788_VTERM_STEP 25
57#define LP8788_MAX_BATT_CAPACITY 100
58#define LP8788_MAX_CHG_IRQS 11
59
60enum lp8788_charging_state {
61 LP8788_OFF,
62 LP8788_WARM_UP,
63 LP8788_LOW_INPUT = 0x3,
64 LP8788_PRECHARGE,
65 LP8788_CC,
66 LP8788_CV,
67 LP8788_MAINTENANCE,
68 LP8788_BATTERY_FAULT,
69 LP8788_SYSTEM_SUPPORT = 0xC,
70 LP8788_HIGH_CURRENT = 0xF,
71 LP8788_MAX_CHG_STATE,
72};
73
74enum lp8788_charger_adc_sel {
75 LP8788_VBATT,
76 LP8788_BATT_TEMP,
77 LP8788_NUM_CHG_ADC,
78};
79
80enum lp8788_charger_input_state {
81 LP8788_SYSTEM_SUPPLY = 1,
82 LP8788_FULL_FUNCTION,
83};
84
85/*
86 * struct lp8788_chg_irq
87 * @which : lp8788 interrupt id
88 * @virq : Linux IRQ number from irq_domain
89 */
90struct lp8788_chg_irq {
91 enum lp8788_int_id which;
92 int virq;
93};
94
95/*
96 * struct lp8788_charger
97 * @lp : used for accessing the registers of mfd lp8788 device
98 * @charger : power supply driver for the battery charger
99 * @battery : power supply driver for the battery
100 * @charger_work : work queue for charger input interrupts
101 * @chan : iio channels for getting adc values
102 * eg) battery voltage, capacity and temperature
103 * @irqs : charger dedicated interrupts
104 * @num_irqs : total numbers of charger interrupts
105 * @pdata : charger platform specific data
106 */
107struct lp8788_charger {
108 struct lp8788 *lp;
109 struct power_supply charger;
110 struct power_supply battery;
111 struct work_struct charger_work;
112 struct iio_channel *chan[LP8788_NUM_CHG_ADC];
113 struct lp8788_chg_irq irqs[LP8788_MAX_CHG_IRQS];
114 int num_irqs;
115 struct lp8788_charger_platform_data *pdata;
116};
117
118static char *battery_supplied_to[] = {
119 LP8788_BATTERY_NAME,
120};
121
122static enum power_supply_property lp8788_charger_prop[] = {
123 POWER_SUPPLY_PROP_ONLINE,
124 POWER_SUPPLY_PROP_CURRENT_MAX,
125};
126
127static enum power_supply_property lp8788_battery_prop[] = {
128 POWER_SUPPLY_PROP_STATUS,
129 POWER_SUPPLY_PROP_HEALTH,
130 POWER_SUPPLY_PROP_PRESENT,
131 POWER_SUPPLY_PROP_VOLTAGE_NOW,
132 POWER_SUPPLY_PROP_CAPACITY,
133 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
134 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
135 POWER_SUPPLY_PROP_TEMP,
136};
137
138static bool lp8788_is_charger_detected(struct lp8788_charger *pchg)
139{
140 u8 data;
141
142 lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
143 data &= LP8788_CHG_INPUT_STATE_M;
144
145 return data == LP8788_SYSTEM_SUPPLY || data == LP8788_FULL_FUNCTION;
146}
147
148static int lp8788_charger_get_property(struct power_supply *psy,
149 enum power_supply_property psp,
150 union power_supply_propval *val)
151{
152 struct lp8788_charger *pchg = dev_get_drvdata(psy->dev->parent);
153 u8 read;
154
155 switch (psp) {
156 case POWER_SUPPLY_PROP_ONLINE:
157 val->intval = lp8788_is_charger_detected(pchg);
158 break;
159 case POWER_SUPPLY_PROP_CURRENT_MAX:
160 lp8788_read_byte(pchg->lp, LP8788_CHG_IDCIN, &read);
161 val->intval = LP8788_ISEL_STEP *
162 (min_t(int, read, LP8788_ISEL_MAX) + 1);
163 break;
164 default:
165 return -EINVAL;
166 }
167
168 return 0;
169}
170
171static int lp8788_get_battery_status(struct lp8788_charger *pchg,
172 union power_supply_propval *val)
173{
174 enum lp8788_charging_state state;
175 u8 data;
176 int ret;
177
178 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
179 if (ret)
180 return ret;
181
182 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
183 switch (state) {
184 case LP8788_OFF:
185 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
186 break;
187 case LP8788_PRECHARGE:
188 case LP8788_CC:
189 case LP8788_CV:
190 case LP8788_HIGH_CURRENT:
191 val->intval = POWER_SUPPLY_STATUS_CHARGING;
192 break;
193 case LP8788_MAINTENANCE:
194 val->intval = POWER_SUPPLY_STATUS_FULL;
195 break;
196 default:
197 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
198 break;
199 }
200
201 return 0;
202}
203
204static int lp8788_get_battery_health(struct lp8788_charger *pchg,
205 union power_supply_propval *val)
206{
207 u8 data;
208 int ret;
209
210 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
211 if (ret)
212 return ret;
213
214 if (data & LP8788_NO_BATT_M)
215 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
216 else if (data & LP8788_BAD_BATT_M)
217 val->intval = POWER_SUPPLY_HEALTH_DEAD;
218 else
219 val->intval = POWER_SUPPLY_HEALTH_GOOD;
220
221 return 0;
222}
223
224static int lp8788_get_battery_present(struct lp8788_charger *pchg,
225 union power_supply_propval *val)
226{
227 u8 data;
228 int ret;
229
230 ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
231 if (ret)
232 return ret;
233
234 val->intval = !(data & LP8788_NO_BATT_M);
235 return 0;
236}
237
238static int lp8788_get_vbatt_adc(struct lp8788_charger *pchg,
239 unsigned int *result)
240{
241 struct iio_channel *channel = pchg->chan[LP8788_VBATT];
242 int scaleint;
243 int scalepart;
244 int ret;
245
246 if (!channel)
247 return -EINVAL;
248
249 ret = iio_read_channel_scale(channel, &scaleint, &scalepart);
250 if (ret != IIO_VAL_INT_PLUS_MICRO)
251 return -EINVAL;
252
253 /* unit: mV */
254 *result = (scaleint + scalepart * 1000000) / 1000;
255
256 return 0;
257}
258
259static int lp8788_get_battery_voltage(struct lp8788_charger *pchg,
260 union power_supply_propval *val)
261{
262 return lp8788_get_vbatt_adc(pchg, &val->intval);
263}
264
265static int lp8788_get_battery_capacity(struct lp8788_charger *pchg,
266 union power_supply_propval *val)
267{
268 struct lp8788 *lp = pchg->lp;
269 struct lp8788_charger_platform_data *pdata = pchg->pdata;
270 unsigned int max_vbatt;
271 unsigned int vbatt;
272 enum lp8788_charging_state state;
273 u8 data;
274 int ret;
275
276 if (!pdata)
277 return -EINVAL;
278
279 max_vbatt = pdata->max_vbatt_mv;
280 if (max_vbatt == 0)
281 return -EINVAL;
282
283 ret = lp8788_read_byte(lp, LP8788_CHG_STATUS, &data);
284 if (ret)
285 return ret;
286
287 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
288
289 if (state == LP8788_MAINTENANCE) {
290 val->intval = LP8788_MAX_BATT_CAPACITY;
291 } else {
292 ret = lp8788_get_vbatt_adc(pchg, &vbatt);
293 if (ret)
294 return ret;
295
296 val->intval = (vbatt * LP8788_MAX_BATT_CAPACITY) / max_vbatt;
297 val->intval = min(val->intval, LP8788_MAX_BATT_CAPACITY);
298 }
299
300 return 0;
301}
302
303static int lp8788_get_battery_temperature(struct lp8788_charger *pchg,
304 union power_supply_propval *val)
305{
306 struct iio_channel *channel = pchg->chan[LP8788_BATT_TEMP];
307 int scaleint;
308 int scalepart;
309 int ret;
310
311 if (!channel)
312 return -EINVAL;
313
314 ret = iio_read_channel_scale(channel, &scaleint, &scalepart);
315 if (ret != IIO_VAL_INT_PLUS_MICRO)
316 return -EINVAL;
317
318 /* unit: 0.1 'C */
319 val->intval = (scaleint + scalepart * 1000000) / 100;
320
321 return 0;
322}
323
324static int lp8788_get_battery_charging_current(struct lp8788_charger *pchg,
325 union power_supply_propval *val)
326{
327 u8 read;
328
329 lp8788_read_byte(pchg->lp, LP8788_CHG_IBATT, &read);
330 read &= LP8788_CHG_IBATT_M;
331 val->intval = LP8788_ISEL_STEP *
332 (min_t(int, read, LP8788_ISEL_MAX) + 1);
333
334 return 0;
335}
336
337static int lp8788_get_charging_termination_voltage(struct lp8788_charger *pchg,
338 union power_supply_propval *val)
339{
340 u8 read;
341
342 lp8788_read_byte(pchg->lp, LP8788_CHG_VTERM, &read);
343 read &= LP8788_CHG_VTERM_M;
344 val->intval = LP8788_VTERM_MIN + LP8788_VTERM_STEP * read;
345
346 return 0;
347}
348
349static int lp8788_battery_get_property(struct power_supply *psy,
350 enum power_supply_property psp,
351 union power_supply_propval *val)
352{
353 struct lp8788_charger *pchg = dev_get_drvdata(psy->dev->parent);
354
355 switch (psp) {
356 case POWER_SUPPLY_PROP_STATUS:
357 return lp8788_get_battery_status(pchg, val);
358 case POWER_SUPPLY_PROP_HEALTH:
359 return lp8788_get_battery_health(pchg, val);
360 case POWER_SUPPLY_PROP_PRESENT:
361 return lp8788_get_battery_present(pchg, val);
362 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
363 return lp8788_get_battery_voltage(pchg, val);
364 case POWER_SUPPLY_PROP_CAPACITY:
365 return lp8788_get_battery_capacity(pchg, val);
366 case POWER_SUPPLY_PROP_TEMP:
367 return lp8788_get_battery_temperature(pchg, val);
368 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
369 return lp8788_get_battery_charging_current(pchg, val);
370 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
371 return lp8788_get_charging_termination_voltage(pchg, val);
372 default:
373 return -EINVAL;
374 }
375}
376
377static inline bool lp8788_is_valid_charger_register(u8 addr)
378{
379 return addr >= LP8788_CHG_START && addr <= LP8788_CHG_END;
380}
381
382static int lp8788_update_charger_params(struct lp8788_charger *pchg)
383{
384 struct lp8788 *lp = pchg->lp;
385 struct lp8788_charger_platform_data *pdata = pchg->pdata;
386 struct lp8788_chg_param *param;
387 int i;
388 int ret;
389
390 if (!pdata || !pdata->chg_params) {
391 dev_info(lp->dev, "skip updating charger parameters\n");
392 return 0;
393 }
394
395 /* settting charging parameters */
396 for (i = 0; i < pdata->num_chg_params; i++) {
397 param = pdata->chg_params + i;
398
399 if (!param)
400 continue;
401
402 if (lp8788_is_valid_charger_register(param->addr)) {
403 ret = lp8788_write_byte(lp, param->addr, param->val);
404 if (ret)
405 return ret;
406 }
407 }
408
409 return 0;
410}
411
412static int lp8788_psy_register(struct platform_device *pdev,
413 struct lp8788_charger *pchg)
414{
415 pchg->charger.name = LP8788_CHARGER_NAME;
416 pchg->charger.type = POWER_SUPPLY_TYPE_MAINS;
417 pchg->charger.properties = lp8788_charger_prop;
418 pchg->charger.num_properties = ARRAY_SIZE(lp8788_charger_prop);
419 pchg->charger.get_property = lp8788_charger_get_property;
420 pchg->charger.supplied_to = battery_supplied_to;
421 pchg->charger.num_supplicants = ARRAY_SIZE(battery_supplied_to);
422
423 if (power_supply_register(&pdev->dev, &pchg->charger))
424 return -EPERM;
425
426 pchg->battery.name = LP8788_BATTERY_NAME;
427 pchg->battery.type = POWER_SUPPLY_TYPE_BATTERY;
428 pchg->battery.properties = lp8788_battery_prop;
429 pchg->battery.num_properties = ARRAY_SIZE(lp8788_battery_prop);
430 pchg->battery.get_property = lp8788_battery_get_property;
431
432 if (power_supply_register(&pdev->dev, &pchg->battery))
433 return -EPERM;
434
435 return 0;
436}
437
438static void lp8788_psy_unregister(struct lp8788_charger *pchg)
439{
440 power_supply_unregister(&pchg->battery);
441 power_supply_unregister(&pchg->charger);
442}
443
444static void lp8788_charger_event(struct work_struct *work)
445{
446 struct lp8788_charger *pchg =
447 container_of(work, struct lp8788_charger, charger_work);
448 struct lp8788_charger_platform_data *pdata = pchg->pdata;
449 enum lp8788_charger_event event = lp8788_is_charger_detected(pchg);
450
451 pdata->charger_event(pchg->lp, event);
452}
453
454static bool lp8788_find_irq_id(struct lp8788_charger *pchg, int virq, int *id)
455{
456 bool found;
457 int i;
458
459 for (i = 0; i < pchg->num_irqs; i++) {
460 if (pchg->irqs[i].virq == virq) {
461 *id = pchg->irqs[i].which;
462 found = true;
463 break;
464 }
465 }
466
467 return found;
468}
469
470static irqreturn_t lp8788_charger_irq_thread(int virq, void *ptr)
471{
472 struct lp8788_charger *pchg = ptr;
473 struct lp8788_charger_platform_data *pdata = pchg->pdata;
474 int id = -1;
475
476 if (!lp8788_find_irq_id(pchg, virq, &id))
477 return IRQ_NONE;
478
479 switch (id) {
480 case LP8788_INT_CHG_INPUT_STATE:
481 case LP8788_INT_CHG_STATE:
482 case LP8788_INT_EOC:
483 case LP8788_INT_BATT_LOW:
484 case LP8788_INT_NO_BATT:
485 power_supply_changed(&pchg->charger);
486 power_supply_changed(&pchg->battery);
487 break;
488 default:
489 break;
490 }
491
492 /* report charger dectection event if used */
493 if (!pdata)
494 goto irq_handled;
495
496 if (pdata->charger_event && id == LP8788_INT_CHG_INPUT_STATE)
497 schedule_work(&pchg->charger_work);
498
499irq_handled:
500 return IRQ_HANDLED;
501}
502
503static int lp8788_set_irqs(struct platform_device *pdev,
504 struct lp8788_charger *pchg, const char *name)
505{
506 struct resource *r;
507 struct irq_domain *irqdm = pchg->lp->irqdm;
508 int irq_start;
509 int irq_end;
510 int virq;
511 int nr_irq;
512 int i;
513 int ret;
514
515 /* no error even if no irq resource */
516 r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, name);
517 if (!r)
518 return 0;
519
520 irq_start = r->start;
521 irq_end = r->end;
522
523 for (i = irq_start; i <= irq_end; i++) {
524 nr_irq = pchg->num_irqs;
525
526 virq = irq_create_mapping(irqdm, i);
527 pchg->irqs[nr_irq].virq = virq;
528 pchg->irqs[nr_irq].which = i;
529 pchg->num_irqs++;
530
531 ret = request_threaded_irq(virq, NULL,
532 lp8788_charger_irq_thread,
533 0, name, pchg);
534 if (ret)
535 break;
536 }
537
538 if (i <= irq_end)
539 goto err_free_irq;
540
541 return 0;
542
543err_free_irq:
544 for (i = 0; i < pchg->num_irqs; i++)
545 free_irq(pchg->irqs[i].virq, pchg);
546 return ret;
547}
548
549static int lp8788_irq_register(struct platform_device *pdev,
550 struct lp8788_charger *pchg)
551{
552 struct lp8788 *lp = pchg->lp;
553 const char *name[] = {
554 LP8788_CHG_IRQ, LP8788_PRSW_IRQ, LP8788_BATT_IRQ
555 };
556 int i;
557 int ret;
558
559 INIT_WORK(&pchg->charger_work, lp8788_charger_event);
560 pchg->num_irqs = 0;
561
562 for (i = 0; i < ARRAY_SIZE(name); i++) {
563 ret = lp8788_set_irqs(pdev, pchg, name[i]);
564 if (ret) {
565 dev_warn(lp->dev, "irq setup failed: %s\n", name[i]);
566 return ret;
567 }
568 }
569
570 if (pchg->num_irqs > LP8788_MAX_CHG_IRQS) {
571 dev_err(lp->dev, "invalid total number of irqs: %d\n",
572 pchg->num_irqs);
573 return -EINVAL;
574 }
575
576
577 return 0;
578}
579
580static void lp8788_irq_unregister(struct platform_device *pdev,
581 struct lp8788_charger *pchg)
582{
583 int i;
584 int irq;
585
586 for (i = 0; i < pchg->num_irqs; i++) {
587 irq = pchg->irqs[i].virq;
588 if (!irq)
589 continue;
590
591 free_irq(irq, pchg);
592 }
593}
594
595static void lp8788_setup_adc_channel(struct lp8788_charger *pchg)
596{
597 struct lp8788_charger_platform_data *pdata = pchg->pdata;
598 struct device *dev = pchg->lp->dev;
599 struct iio_channel *chan;
600 enum lp8788_adc_id id;
601 const char *chan_name[LPADC_MAX] = {
602 [LPADC_VBATT_5P5] = "vbatt-5p5",
603 [LPADC_VBATT_6P0] = "vbatt-6p0",
604 [LPADC_VBATT_5P0] = "vbatt-5p0",
605 [LPADC_ADC1] = "adc1",
606 [LPADC_ADC2] = "adc2",
607 [LPADC_ADC3] = "adc3",
608 [LPADC_ADC4] = "adc4",
609 };
610
611 if (!pdata)
612 return;
613
614 id = pdata->vbatt_adc;
615 switch (id) {
616 case LPADC_VBATT_5P5:
617 case LPADC_VBATT_6P0:
618 case LPADC_VBATT_5P0:
619 chan = iio_channel_get(NULL, chan_name[id]);
620 pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan;
621 break;
622 default:
623 dev_err(dev, "invalid ADC id for VBATT: %d\n", id);
624 pchg->chan[LP8788_VBATT] = NULL;
625 break;
626 }
627
628 id = pdata->batt_temp_adc;
629 switch (id) {
630 case LPADC_ADC1:
631 case LPADC_ADC2:
632 case LPADC_ADC3:
633 case LPADC_ADC4:
634 chan = iio_channel_get(NULL, chan_name[id]);
635 pchg->chan[LP8788_BATT_TEMP] = IS_ERR(chan) ? NULL : chan;
636 break;
637 default:
638 dev_err(dev, "invalid ADC id for BATT_TEMP : %d\n", id);
639 pchg->chan[LP8788_BATT_TEMP] = NULL;
640 break;
641 }
642}
643
644static void lp8788_release_adc_channel(struct lp8788_charger *pchg)
645{
646 int i;
647
648 for (i = 0; i < LP8788_NUM_CHG_ADC; i++) {
649 if (!pchg->chan[i])
650 continue;
651
652 iio_channel_release(pchg->chan[i]);
653 pchg->chan[i] = NULL;
654 }
655}
656
657static ssize_t lp8788_show_charger_status(struct device *dev,
658 struct device_attribute *attr, char *buf)
659{
660 struct lp8788_charger *pchg = dev_get_drvdata(dev);
661 enum lp8788_charging_state state;
662 char *desc[LP8788_MAX_CHG_STATE] = {
663 [LP8788_OFF] = "CHARGER OFF",
664 [LP8788_WARM_UP] = "WARM UP",
665 [LP8788_LOW_INPUT] = "LOW INPUT STATE",
666 [LP8788_PRECHARGE] = "CHARGING - PRECHARGE",
667 [LP8788_CC] = "CHARGING - CC",
668 [LP8788_CV] = "CHARGING - CV",
669 [LP8788_MAINTENANCE] = "NO CHARGING - MAINTENANCE",
670 [LP8788_BATTERY_FAULT] = "BATTERY FAULT",
671 [LP8788_SYSTEM_SUPPORT] = "SYSTEM SUPPORT",
672 [LP8788_HIGH_CURRENT] = "HIGH CURRENT",
673 };
674 u8 data;
675
676 lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data);
677 state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S;
678
679 return scnprintf(buf, LP8788_BUF_SIZE, "%s\n", desc[state]);
680}
681
682static ssize_t lp8788_show_eoc_time(struct device *dev,
683 struct device_attribute *attr, char *buf)
684{
685 struct lp8788_charger *pchg = dev_get_drvdata(dev);
686 char *stime[] = { "400ms", "5min", "10min", "15min",
687 "20min", "25min", "30min" "No timeout" };
688 u8 val;
689
690 lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
691 val = (val & LP8788_CHG_EOC_TIME_M) >> LP8788_CHG_EOC_TIME_S;
692
693 return scnprintf(buf, LP8788_BUF_SIZE, "End Of Charge Time: %s\n",
694 stime[val]);
695}
696
697static ssize_t lp8788_show_eoc_level(struct device *dev,
698 struct device_attribute *attr, char *buf)
699{
700 struct lp8788_charger *pchg = dev_get_drvdata(dev);
701 char *abs_level[] = { "25mA", "49mA", "75mA", "98mA" };
702 char *relative_level[] = { "5%", "10%", "15%", "20%" };
703 char *level;
704 u8 val;
705 u8 mode;
706
707 lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);
708
709 mode = val & LP8788_CHG_EOC_MODE_M;
710 val = (val & LP8788_CHG_EOC_LEVEL_M) >> LP8788_CHG_EOC_LEVEL_S;
711 level = mode ? abs_level[val] : relative_level[val];
712
713 return scnprintf(buf, LP8788_BUF_SIZE, "End Of Charge Level: %s\n",
714 level);
715}
716
717static DEVICE_ATTR(charger_status, S_IRUSR, lp8788_show_charger_status, NULL);
718static DEVICE_ATTR(eoc_time, S_IRUSR, lp8788_show_eoc_time, NULL);
719static DEVICE_ATTR(eoc_level, S_IRUSR, lp8788_show_eoc_level, NULL);
720
721static struct attribute *lp8788_charger_attr[] = {
722 &dev_attr_charger_status.attr,
723 &dev_attr_eoc_time.attr,
724 &dev_attr_eoc_level.attr,
725 NULL,
726};
727
728static const struct attribute_group lp8788_attr_group = {
729 .attrs = lp8788_charger_attr,
730};
731
732static __devinit int lp8788_charger_probe(struct platform_device *pdev)
733{
734 struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
735 struct lp8788_charger *pchg;
736 int ret;
737
738 pchg = devm_kzalloc(lp->dev, sizeof(struct lp8788_charger), GFP_KERNEL);
739 if (!pchg)
740 return -ENOMEM;
741
742 pchg->lp = lp;
743 pchg->pdata = lp->pdata ? lp->pdata->chg_pdata : NULL;
744 platform_set_drvdata(pdev, pchg);
745
746 ret = lp8788_update_charger_params(pchg);
747 if (ret)
748 return ret;
749
750 lp8788_setup_adc_channel(pchg);
751
752 ret = lp8788_psy_register(pdev, pchg);
753 if (ret)
754 return ret;
755
756 ret = sysfs_create_group(&pdev->dev.kobj, &lp8788_attr_group);
757 if (ret) {
758 lp8788_psy_unregister(pchg);
759 return ret;
760 }
761
762 ret = lp8788_irq_register(pdev, pchg);
763 if (ret)
764 dev_warn(lp->dev, "failed to register charger irq: %d\n", ret);
765
766 return 0;
767}
768
769static int __devexit lp8788_charger_remove(struct platform_device *pdev)
770{
771 struct lp8788_charger *pchg = platform_get_drvdata(pdev);
772
773 flush_work(&pchg->charger_work);
774 lp8788_irq_unregister(pdev, pchg);
775 sysfs_remove_group(&pdev->dev.kobj, &lp8788_attr_group);
776 lp8788_psy_unregister(pchg);
777 lp8788_release_adc_channel(pchg);
778
779 return 0;
780}
781
782static struct platform_driver lp8788_charger_driver = {
783 .probe = lp8788_charger_probe,
784 .remove = __devexit_p(lp8788_charger_remove),
785 .driver = {
786 .name = LP8788_DEV_CHARGER,
787 .owner = THIS_MODULE,
788 },
789};
790module_platform_driver(lp8788_charger_driver);
791
792MODULE_DESCRIPTION("TI LP8788 Charger Driver");
793MODULE_AUTHOR("Milo Kim");
794MODULE_LICENSE("GPL");
795MODULE_ALIAS("platform:lp8788-charger");
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-23 11:47:24 -0500