1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19#include <linux/module.h>
20#include <linux/kernel.h>
21#include <linux/device.h>
22#include <linux/regmap.h>
23#include <linux/jiffies.h>
24#include <linux/interrupt.h>
25#include <linux/workqueue.h>
26#include <linux/mfd/axp20x.h>
27#include <linux/platform_device.h>
28#include <linux/power_supply.h>
29#include <linux/iio/consumer.h>
30#include <linux/debugfs.h>
31#include <linux/seq_file.h>
32#include <asm/unaligned.h>
33
34#define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
35#define CHRG_STAT_BAT_VALID (1 << 4)
36#define CHRG_STAT_BAT_PRESENT (1 << 5)
37#define CHRG_STAT_CHARGING (1 << 6)
38#define CHRG_STAT_PMIC_OTP (1 << 7)
39
40#define CHRG_CCCV_CC_MASK 0xf
41#define CHRG_CCCV_CC_BIT_POS 0
42#define CHRG_CCCV_CC_OFFSET 200
43#define CHRG_CCCV_CC_LSB_RES 200
44#define CHRG_CCCV_ITERM_20P (1 << 4)
45#define CHRG_CCCV_CV_MASK 0x60
46#define CHRG_CCCV_CV_BIT_POS 5
47#define CHRG_CCCV_CV_4100MV 0x0
48#define CHRG_CCCV_CV_4150MV 0x1
49#define CHRG_CCCV_CV_4200MV 0x2
50#define CHRG_CCCV_CV_4350MV 0x3
51#define CHRG_CCCV_CHG_EN (1 << 7)
52
53#define FG_CNTL_OCV_ADJ_STAT (1 << 2)
54#define FG_CNTL_OCV_ADJ_EN (1 << 3)
55#define FG_CNTL_CAP_ADJ_STAT (1 << 4)
56#define FG_CNTL_CAP_ADJ_EN (1 << 5)
57#define FG_CNTL_CC_EN (1 << 6)
58#define FG_CNTL_GAUGE_EN (1 << 7)
59
60#define FG_15BIT_WORD_VALID (1 << 15)
61#define FG_15BIT_VAL_MASK 0x7fff
62
63#define FG_REP_CAP_VALID (1 << 7)
64#define FG_REP_CAP_VAL_MASK 0x7F
65
66#define FG_DES_CAP1_VALID (1 << 7)
67#define FG_DES_CAP_RES_LSB 1456
68
69#define FG_DES_CC_RES_LSB 1456
70
71#define FG_OCV_CAP_VALID (1 << 7)
72#define FG_OCV_CAP_VAL_MASK 0x7F
73#define FG_CC_CAP_VALID (1 << 7)
74#define FG_CC_CAP_VAL_MASK 0x7F
75
76#define FG_LOW_CAP_THR1_MASK 0xf0
77#define FG_LOW_CAP_THR1_VAL 0xa0
78#define FG_LOW_CAP_THR2_MASK 0x0f
79#define FG_LOW_CAP_WARN_THR 14
80#define FG_LOW_CAP_CRIT_THR 4
81#define FG_LOW_CAP_SHDN_THR 0
82
83#define STATUS_MON_DELAY_JIFFIES (HZ * 60)
84#define NR_RETRY_CNT 3
85#define DEV_NAME "axp288_fuel_gauge"
86
87
88#define VOLTAGE_FROM_ADC(a) ((a * 11) / 10)
89
90#define PROP_VOLT(a) ((a) * 1000)
91#define PROP_CURR(a) ((a) * 1000)
92
93#define AXP288_FG_INTR_NUM 6
94enum {
95 QWBTU_IRQ = 0,
96 WBTU_IRQ,
97 QWBTO_IRQ,
98 WBTO_IRQ,
99 WL2_IRQ,
100 WL1_IRQ,
101};
102
103struct axp288_fg_info {
104 struct platform_device *pdev;
105 struct regmap *regmap;
106 struct regmap_irq_chip_data *regmap_irqc;
107 int irq[AXP288_FG_INTR_NUM];
108 struct power_supply *bat;
109 struct mutex lock;
110 int status;
111 int max_volt;
112 struct delayed_work status_monitor;
113 struct dentry *debug_file;
114};
115
116static enum power_supply_property fuel_gauge_props[] = {
117 POWER_SUPPLY_PROP_STATUS,
118 POWER_SUPPLY_PROP_PRESENT,
119 POWER_SUPPLY_PROP_HEALTH,
120 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
121 POWER_SUPPLY_PROP_VOLTAGE_NOW,
122 POWER_SUPPLY_PROP_VOLTAGE_OCV,
123 POWER_SUPPLY_PROP_CURRENT_NOW,
124 POWER_SUPPLY_PROP_CAPACITY,
125 POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
126 POWER_SUPPLY_PROP_TECHNOLOGY,
127 POWER_SUPPLY_PROP_CHARGE_FULL,
128 POWER_SUPPLY_PROP_CHARGE_NOW,
129};
130
131static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
132{
133 int ret, i;
134 unsigned int val;
135
136 for (i = 0; i < NR_RETRY_CNT; i++) {
137 ret = regmap_read(info->regmap, reg, &val);
138 if (ret == -EBUSY)
139 continue;
140 else
141 break;
142 }
143
144 if (ret < 0) {
145 dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret);
146 return ret;
147 }
148
149 return val;
150}
151
152static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val)
153{
154 int ret;
155
156 ret = regmap_write(info->regmap, reg, (unsigned int)val);
157
158 if (ret < 0)
159 dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret);
160
161 return ret;
162}
163
164static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg)
165{
166 unsigned char buf[2];
167 int ret;
168
169 ret = regmap_bulk_read(info->regmap, reg, buf, 2);
170 if (ret < 0) {
171 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
172 reg, ret);
173 return ret;
174 }
175
176 ret = get_unaligned_be16(buf);
177 if (!(ret & FG_15BIT_WORD_VALID)) {
178 dev_err(&info->pdev->dev, "Error reg 0x%02x contents not valid\n",
179 reg);
180 return -ENXIO;
181 }
182
183 return ret & FG_15BIT_VAL_MASK;
184}
185
186static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg)
187{
188 unsigned char buf[2];
189 int ret;
190
191 ret = regmap_bulk_read(info->regmap, reg, buf, 2);
192 if (ret < 0) {
193 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
194 reg, ret);
195 return ret;
196 }
197
198
199 return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f);
200}
201
202static int pmic_read_adc_val(const char *name, int *raw_val,
203 struct axp288_fg_info *info)
204{
205 int ret, val = 0;
206 struct iio_channel *indio_chan;
207
208 indio_chan = iio_channel_get(NULL, name);
209 if (IS_ERR_OR_NULL(indio_chan)) {
210 ret = PTR_ERR(indio_chan);
211 goto exit;
212 }
213 ret = iio_read_channel_raw(indio_chan, &val);
214 if (ret < 0) {
215 dev_err(&info->pdev->dev,
216 "IIO channel read error: %x, %x\n", ret, val);
217 goto err_exit;
218 }
219
220 dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val);
221 *raw_val = val;
222
223err_exit:
224 iio_channel_release(indio_chan);
225exit:
226 return ret;
227}
228
229#ifdef CONFIG_DEBUG_FS
230static int fuel_gauge_debug_show(struct seq_file *s, void *data)
231{
232 struct axp288_fg_info *info = s->private;
233 int raw_val, ret;
234
235 seq_printf(s, " PWR_STATUS[%02x] : %02x\n",
236 AXP20X_PWR_INPUT_STATUS,
237 fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS));
238 seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n",
239 AXP20X_PWR_OP_MODE,
240 fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE));
241 seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n",
242 AXP20X_CHRG_CTRL1,
243 fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1));
244 seq_printf(s, " VLTF[%02x] : %02x\n",
245 AXP20X_V_LTF_DISCHRG,
246 fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG));
247 seq_printf(s, " VHTF[%02x] : %02x\n",
248 AXP20X_V_HTF_DISCHRG,
249 fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG));
250 seq_printf(s, " CC_CTRL[%02x] : %02x\n",
251 AXP20X_CC_CTRL,
252 fuel_gauge_reg_readb(info, AXP20X_CC_CTRL));
253 seq_printf(s, "BATTERY CAP[%02x] : %02x\n",
254 AXP20X_FG_RES,
255 fuel_gauge_reg_readb(info, AXP20X_FG_RES));
256 seq_printf(s, " FG_RDC1[%02x] : %02x\n",
257 AXP288_FG_RDC1_REG,
258 fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG));
259 seq_printf(s, " FG_RDC0[%02x] : %02x\n",
260 AXP288_FG_RDC0_REG,
261 fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG));
262 seq_printf(s, " FG_OCV[%02x] : %04x\n",
263 AXP288_FG_OCVH_REG,
264 fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG));
265 seq_printf(s, " FG_DES_CAP[%02x] : %04x\n",
266 AXP288_FG_DES_CAP1_REG,
267 fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG));
268 seq_printf(s, " FG_CC_MTR[%02x] : %04x\n",
269 AXP288_FG_CC_MTR1_REG,
270 fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG));
271 seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n",
272 AXP288_FG_OCV_CAP_REG,
273 fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG));
274 seq_printf(s, " FG_CC_CAP[%02x] : %02x\n",
275 AXP288_FG_CC_CAP_REG,
276 fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG));
277 seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n",
278 AXP288_FG_LOW_CAP_REG,
279 fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG));
280 seq_printf(s, "TUNING_CTL0[%02x] : %02x\n",
281 AXP288_FG_TUNE0,
282 fuel_gauge_reg_readb(info, AXP288_FG_TUNE0));
283 seq_printf(s, "TUNING_CTL1[%02x] : %02x\n",
284 AXP288_FG_TUNE1,
285 fuel_gauge_reg_readb(info, AXP288_FG_TUNE1));
286 seq_printf(s, "TUNING_CTL2[%02x] : %02x\n",
287 AXP288_FG_TUNE2,
288 fuel_gauge_reg_readb(info, AXP288_FG_TUNE2));
289 seq_printf(s, "TUNING_CTL3[%02x] : %02x\n",
290 AXP288_FG_TUNE3,
291 fuel_gauge_reg_readb(info, AXP288_FG_TUNE3));
292 seq_printf(s, "TUNING_CTL4[%02x] : %02x\n",
293 AXP288_FG_TUNE4,
294 fuel_gauge_reg_readb(info, AXP288_FG_TUNE4));
295 seq_printf(s, "TUNING_CTL5[%02x] : %02x\n",
296 AXP288_FG_TUNE5,
297 fuel_gauge_reg_readb(info, AXP288_FG_TUNE5));
298
299 ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
300 if (ret >= 0)
301 seq_printf(s, "axp288-batttemp : %d\n", raw_val);
302 ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info);
303 if (ret >= 0)
304 seq_printf(s, "axp288-pmictemp : %d\n", raw_val);
305 ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info);
306 if (ret >= 0)
307 seq_printf(s, "axp288-systtemp : %d\n", raw_val);
308 ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info);
309 if (ret >= 0)
310 seq_printf(s, "axp288-chrgcurr : %d\n", raw_val);
311 ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info);
312 if (ret >= 0)
313 seq_printf(s, "axp288-dchrgcur : %d\n", raw_val);
314 ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
315 if (ret >= 0)
316 seq_printf(s, "axp288-battvolt : %d\n", raw_val);
317
318 return 0;
319}
320
321static int debug_open(struct inode *inode, struct file *file)
322{
323 return single_open(file, fuel_gauge_debug_show, inode->i_private);
324}
325
326static const struct file_operations fg_debug_fops = {
327 .open = debug_open,
328 .read = seq_read,
329 .llseek = seq_lseek,
330 .release = single_release,
331};
332
333static void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
334{
335 info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL,
336 info, &fg_debug_fops);
337}
338
339static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
340{
341 debugfs_remove(info->debug_file);
342}
343#else
344static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
345{
346}
347static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
348{
349}
350#endif
351
352static void fuel_gauge_get_status(struct axp288_fg_info *info)
353{
354 int pwr_stat, ret;
355 int charge, discharge;
356
357 pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
358 if (pwr_stat < 0) {
359 dev_err(&info->pdev->dev,
360 "PWR STAT read failed:%d\n", pwr_stat);
361 return;
362 }
363 ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
364 if (ret < 0) {
365 dev_err(&info->pdev->dev,
366 "ADC charge current read failed:%d\n", ret);
367 return;
368 }
369 ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
370 if (ret < 0) {
371 dev_err(&info->pdev->dev,
372 "ADC discharge current read failed:%d\n", ret);
373 return;
374 }
375
376 if (charge > 0)
377 info->status = POWER_SUPPLY_STATUS_CHARGING;
378 else if (discharge > 0)
379 info->status = POWER_SUPPLY_STATUS_DISCHARGING;
380 else {
381 if (pwr_stat & CHRG_STAT_BAT_PRESENT)
382 info->status = POWER_SUPPLY_STATUS_FULL;
383 else
384 info->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
385 }
386}
387
388static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt)
389{
390 int ret = 0, raw_val;
391
392 ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
393 if (ret < 0)
394 goto vbatt_read_fail;
395
396 *vbatt = VOLTAGE_FROM_ADC(raw_val);
397vbatt_read_fail:
398 return ret;
399}
400
401static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur)
402{
403 int ret, value = 0;
404 int charge, discharge;
405
406 ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
407 if (ret < 0)
408 goto current_read_fail;
409 ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
410 if (ret < 0)
411 goto current_read_fail;
412
413 if (charge > 0)
414 value = charge;
415 else if (discharge > 0)
416 value = -1 * discharge;
417
418 *cur = value;
419current_read_fail:
420 return ret;
421}
422
423static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv)
424{
425 int ret;
426
427 ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG);
428 if (ret >= 0)
429 *vocv = VOLTAGE_FROM_ADC(ret);
430
431 return ret;
432}
433
434static int fuel_gauge_battery_health(struct axp288_fg_info *info)
435{
436 int ret, vocv, health = POWER_SUPPLY_HEALTH_UNKNOWN;
437
438 ret = fuel_gauge_get_vocv(info, &vocv);
439 if (ret < 0)
440 goto health_read_fail;
441
442 if (vocv > info->max_volt)
443 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
444 else
445 health = POWER_SUPPLY_HEALTH_GOOD;
446
447health_read_fail:
448 return health;
449}
450
451static int fuel_gauge_get_property(struct power_supply *ps,
452 enum power_supply_property prop,
453 union power_supply_propval *val)
454{
455 struct axp288_fg_info *info = power_supply_get_drvdata(ps);
456 int ret = 0, value;
457
458 mutex_lock(&info->lock);
459 switch (prop) {
460 case POWER_SUPPLY_PROP_STATUS:
461 fuel_gauge_get_status(info);
462 val->intval = info->status;
463 break;
464 case POWER_SUPPLY_PROP_HEALTH:
465 val->intval = fuel_gauge_battery_health(info);
466 break;
467 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
468 ret = fuel_gauge_get_vbatt(info, &value);
469 if (ret < 0)
470 goto fuel_gauge_read_err;
471 val->intval = PROP_VOLT(value);
472 break;
473 case POWER_SUPPLY_PROP_VOLTAGE_OCV:
474 ret = fuel_gauge_get_vocv(info, &value);
475 if (ret < 0)
476 goto fuel_gauge_read_err;
477 val->intval = PROP_VOLT(value);
478 break;
479 case POWER_SUPPLY_PROP_CURRENT_NOW:
480 ret = fuel_gauge_get_current(info, &value);
481 if (ret < 0)
482 goto fuel_gauge_read_err;
483 val->intval = PROP_CURR(value);
484 break;
485 case POWER_SUPPLY_PROP_PRESENT:
486 ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE);
487 if (ret < 0)
488 goto fuel_gauge_read_err;
489
490 if (ret & CHRG_STAT_BAT_PRESENT)
491 val->intval = 1;
492 else
493 val->intval = 0;
494 break;
495 case POWER_SUPPLY_PROP_CAPACITY:
496 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
497 if (ret < 0)
498 goto fuel_gauge_read_err;
499
500 if (!(ret & FG_REP_CAP_VALID))
501 dev_err(&info->pdev->dev,
502 "capacity measurement not valid\n");
503 val->intval = (ret & FG_REP_CAP_VAL_MASK);
504 break;
505 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
506 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
507 if (ret < 0)
508 goto fuel_gauge_read_err;
509 val->intval = (ret & 0x0f);
510 break;
511 case POWER_SUPPLY_PROP_TECHNOLOGY:
512 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
513 break;
514 case POWER_SUPPLY_PROP_CHARGE_NOW:
515 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG);
516 if (ret < 0)
517 goto fuel_gauge_read_err;
518
519 val->intval = ret * FG_DES_CAP_RES_LSB;
520 break;
521 case POWER_SUPPLY_PROP_CHARGE_FULL:
522 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG);
523 if (ret < 0)
524 goto fuel_gauge_read_err;
525
526 val->intval = ret * FG_DES_CAP_RES_LSB;
527 break;
528 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
529 val->intval = PROP_VOLT(info->max_volt);
530 break;
531 default:
532 mutex_unlock(&info->lock);
533 return -EINVAL;
534 }
535
536 mutex_unlock(&info->lock);
537 return 0;
538
539fuel_gauge_read_err:
540 mutex_unlock(&info->lock);
541 return ret;
542}
543
544static int fuel_gauge_set_property(struct power_supply *ps,
545 enum power_supply_property prop,
546 const union power_supply_propval *val)
547{
548 struct axp288_fg_info *info = power_supply_get_drvdata(ps);
549 int ret = 0;
550
551 mutex_lock(&info->lock);
552 switch (prop) {
553 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
554 if ((val->intval < 0) || (val->intval > 15)) {
555 ret = -EINVAL;
556 break;
557 }
558 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
559 if (ret < 0)
560 break;
561 ret &= 0xf0;
562 ret |= (val->intval & 0xf);
563 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret);
564 break;
565 default:
566 ret = -EINVAL;
567 break;
568 }
569
570 mutex_unlock(&info->lock);
571 return ret;
572}
573
574static int fuel_gauge_property_is_writeable(struct power_supply *psy,
575 enum power_supply_property psp)
576{
577 int ret;
578
579 switch (psp) {
580 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
581 ret = 1;
582 break;
583 default:
584 ret = 0;
585 }
586
587 return ret;
588}
589
590static void fuel_gauge_status_monitor(struct work_struct *work)
591{
592 struct axp288_fg_info *info = container_of(work,
593 struct axp288_fg_info, status_monitor.work);
594
595 fuel_gauge_get_status(info);
596 power_supply_changed(info->bat);
597 schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
598}
599
600static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev)
601{
602 struct axp288_fg_info *info = dev;
603 int i;
604
605 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
606 if (info->irq[i] == irq)
607 break;
608 }
609
610 if (i >= AXP288_FG_INTR_NUM) {
611 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
612 return IRQ_NONE;
613 }
614
615 switch (i) {
616 case QWBTU_IRQ:
617 dev_info(&info->pdev->dev,
618 "Quit Battery under temperature in work mode IRQ (QWBTU)\n");
619 break;
620 case WBTU_IRQ:
621 dev_info(&info->pdev->dev,
622 "Battery under temperature in work mode IRQ (WBTU)\n");
623 break;
624 case QWBTO_IRQ:
625 dev_info(&info->pdev->dev,
626 "Quit Battery over temperature in work mode IRQ (QWBTO)\n");
627 break;
628 case WBTO_IRQ:
629 dev_info(&info->pdev->dev,
630 "Battery over temperature in work mode IRQ (WBTO)\n");
631 break;
632 case WL2_IRQ:
633 dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n");
634 break;
635 case WL1_IRQ:
636 dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n");
637 break;
638 default:
639 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
640 }
641
642 power_supply_changed(info->bat);
643 return IRQ_HANDLED;
644}
645
646static void fuel_gauge_external_power_changed(struct power_supply *psy)
647{
648 struct axp288_fg_info *info = power_supply_get_drvdata(psy);
649
650 power_supply_changed(info->bat);
651}
652
653static const struct power_supply_desc fuel_gauge_desc = {
654 .name = DEV_NAME,
655 .type = POWER_SUPPLY_TYPE_BATTERY,
656 .properties = fuel_gauge_props,
657 .num_properties = ARRAY_SIZE(fuel_gauge_props),
658 .get_property = fuel_gauge_get_property,
659 .set_property = fuel_gauge_set_property,
660 .property_is_writeable = fuel_gauge_property_is_writeable,
661 .external_power_changed = fuel_gauge_external_power_changed,
662};
663
664static void fuel_gauge_init_irq(struct axp288_fg_info *info)
665{
666 int ret, i, pirq;
667
668 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
669 pirq = platform_get_irq(info->pdev, i);
670 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
671 if (info->irq[i] < 0) {
672 dev_warn(&info->pdev->dev,
673 "regmap_irq get virq failed for IRQ %d: %d\n",
674 pirq, info->irq[i]);
675 info->irq[i] = -1;
676 goto intr_failed;
677 }
678 ret = request_threaded_irq(info->irq[i],
679 NULL, fuel_gauge_thread_handler,
680 IRQF_ONESHOT, DEV_NAME, info);
681 if (ret) {
682 dev_warn(&info->pdev->dev,
683 "request irq failed for IRQ %d: %d\n",
684 pirq, info->irq[i]);
685 info->irq[i] = -1;
686 goto intr_failed;
687 } else {
688 dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n",
689 pirq, info->irq[i]);
690 }
691 }
692 return;
693
694intr_failed:
695 for (; i > 0; i--) {
696 free_irq(info->irq[i - 1], info);
697 info->irq[i - 1] = -1;
698 }
699}
700
701static int axp288_fuel_gauge_probe(struct platform_device *pdev)
702{
703 int ret = 0;
704 struct axp288_fg_info *info;
705 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
706 struct power_supply_config psy_cfg = {};
707
708 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
709 if (!info)
710 return -ENOMEM;
711
712 info->pdev = pdev;
713 info->regmap = axp20x->regmap;
714 info->regmap_irqc = axp20x->regmap_irqc;
715 info->status = POWER_SUPPLY_STATUS_UNKNOWN;
716
717 platform_set_drvdata(pdev, info);
718
719 mutex_init(&info->lock);
720 INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor);
721
722 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
723 if (ret < 0)
724 return ret;
725
726 if (!(ret & FG_DES_CAP1_VALID)) {
727 dev_err(&pdev->dev, "axp288 not configured by firmware\n");
728 return -ENODEV;
729 }
730
731 ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
732 if (ret < 0)
733 return ret;
734 switch ((ret & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS) {
735 case CHRG_CCCV_CV_4100MV:
736 info->max_volt = 4100;
737 break;
738 case CHRG_CCCV_CV_4150MV:
739 info->max_volt = 4150;
740 break;
741 case CHRG_CCCV_CV_4200MV:
742 info->max_volt = 4200;
743 break;
744 case CHRG_CCCV_CV_4350MV:
745 info->max_volt = 4350;
746 break;
747 }
748
749 psy_cfg.drv_data = info;
750 info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg);
751 if (IS_ERR(info->bat)) {
752 ret = PTR_ERR(info->bat);
753 dev_err(&pdev->dev, "failed to register battery: %d\n", ret);
754 return ret;
755 }
756
757 fuel_gauge_create_debugfs(info);
758 fuel_gauge_init_irq(info);
759 schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
760
761 return 0;
762}
763
764static const struct platform_device_id axp288_fg_id_table[] = {
765 { .name = DEV_NAME },
766 {},
767};
768MODULE_DEVICE_TABLE(platform, axp288_fg_id_table);
769
770static int axp288_fuel_gauge_remove(struct platform_device *pdev)
771{
772 struct axp288_fg_info *info = platform_get_drvdata(pdev);
773 int i;
774
775 cancel_delayed_work_sync(&info->status_monitor);
776 power_supply_unregister(info->bat);
777 fuel_gauge_remove_debugfs(info);
778
779 for (i = 0; i < AXP288_FG_INTR_NUM; i++)
780 if (info->irq[i] >= 0)
781 free_irq(info->irq[i], info);
782
783 return 0;
784}
785
786static struct platform_driver axp288_fuel_gauge_driver = {
787 .probe = axp288_fuel_gauge_probe,
788 .remove = axp288_fuel_gauge_remove,
789 .id_table = axp288_fg_id_table,
790 .driver = {
791 .name = DEV_NAME,
792 },
793};
794
795module_platform_driver(axp288_fuel_gauge_driver);
796
797MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
798MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>");
799MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver");
800MODULE_LICENSE("GPL");
801
