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20#include <linux/dmi.h>
21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/device.h>
24#include <linux/regmap.h>
25#include <linux/jiffies.h>
26#include <linux/interrupt.h>
27#include <linux/workqueue.h>
28#include <linux/mfd/axp20x.h>
29#include <linux/platform_device.h>
30#include <linux/power_supply.h>
31#include <linux/iio/consumer.h>
32#include <linux/debugfs.h>
33#include <linux/seq_file.h>
34#include <asm/unaligned.h>
35
36#define PS_STAT_VBUS_TRIGGER (1 << 0)
37#define PS_STAT_BAT_CHRG_DIR (1 << 2)
38#define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3)
39#define PS_STAT_VBUS_VALID (1 << 4)
40#define PS_STAT_VBUS_PRESENT (1 << 5)
41
42#define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
43#define CHRG_STAT_BAT_VALID (1 << 4)
44#define CHRG_STAT_BAT_PRESENT (1 << 5)
45#define CHRG_STAT_CHARGING (1 << 6)
46#define CHRG_STAT_PMIC_OTP (1 << 7)
47
48#define CHRG_CCCV_CC_MASK 0xf
49#define CHRG_CCCV_CC_BIT_POS 0
50#define CHRG_CCCV_CC_OFFSET 200
51#define CHRG_CCCV_CC_LSB_RES 200
52#define CHRG_CCCV_ITERM_20P (1 << 4)
53#define CHRG_CCCV_CV_MASK 0x60
54#define CHRG_CCCV_CV_BIT_POS 5
55#define CHRG_CCCV_CV_4100MV 0x0
56#define CHRG_CCCV_CV_4150MV 0x1
57#define CHRG_CCCV_CV_4200MV 0x2
58#define CHRG_CCCV_CV_4350MV 0x3
59#define CHRG_CCCV_CHG_EN (1 << 7)
60
61#define FG_CNTL_OCV_ADJ_STAT (1 << 2)
62#define FG_CNTL_OCV_ADJ_EN (1 << 3)
63#define FG_CNTL_CAP_ADJ_STAT (1 << 4)
64#define FG_CNTL_CAP_ADJ_EN (1 << 5)
65#define FG_CNTL_CC_EN (1 << 6)
66#define FG_CNTL_GAUGE_EN (1 << 7)
67
68#define FG_15BIT_WORD_VALID (1 << 15)
69#define FG_15BIT_VAL_MASK 0x7fff
70
71#define FG_REP_CAP_VALID (1 << 7)
72#define FG_REP_CAP_VAL_MASK 0x7F
73
74#define FG_DES_CAP1_VALID (1 << 7)
75#define FG_DES_CAP_RES_LSB 1456
76
77#define FG_DES_CC_RES_LSB 1456
78
79#define FG_OCV_CAP_VALID (1 << 7)
80#define FG_OCV_CAP_VAL_MASK 0x7F
81#define FG_CC_CAP_VALID (1 << 7)
82#define FG_CC_CAP_VAL_MASK 0x7F
83
84#define FG_LOW_CAP_THR1_MASK 0xf0
85#define FG_LOW_CAP_THR1_VAL 0xa0
86#define FG_LOW_CAP_THR2_MASK 0x0f
87#define FG_LOW_CAP_WARN_THR 14
88#define FG_LOW_CAP_CRIT_THR 4
89#define FG_LOW_CAP_SHDN_THR 0
90
91#define STATUS_MON_DELAY_JIFFIES (HZ * 60)
92#define NR_RETRY_CNT 3
93#define DEV_NAME "axp288_fuel_gauge"
94
95
96#define VOLTAGE_FROM_ADC(a) ((a * 11) / 10)
97
98#define PROP_VOLT(a) ((a) * 1000)
99#define PROP_CURR(a) ((a) * 1000)
100
101#define AXP288_FG_INTR_NUM 6
102enum {
103 QWBTU_IRQ = 0,
104 WBTU_IRQ,
105 QWBTO_IRQ,
106 WBTO_IRQ,
107 WL2_IRQ,
108 WL1_IRQ,
109};
110
111enum {
112 BAT_TEMP = 0,
113 PMIC_TEMP,
114 SYSTEM_TEMP,
115 BAT_CHRG_CURR,
116 BAT_D_CURR,
117 BAT_VOLT,
118 IIO_CHANNEL_NUM
119};
120
121struct axp288_fg_info {
122 struct platform_device *pdev;
123 struct regmap *regmap;
124 struct regmap_irq_chip_data *regmap_irqc;
125 int irq[AXP288_FG_INTR_NUM];
126 struct iio_channel *iio_channel[IIO_CHANNEL_NUM];
127 struct power_supply *bat;
128 struct mutex lock;
129 int status;
130 int max_volt;
131 struct delayed_work status_monitor;
132 struct dentry *debug_file;
133};
134
135static enum power_supply_property fuel_gauge_props[] = {
136 POWER_SUPPLY_PROP_STATUS,
137 POWER_SUPPLY_PROP_PRESENT,
138 POWER_SUPPLY_PROP_HEALTH,
139 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
140 POWER_SUPPLY_PROP_VOLTAGE_NOW,
141 POWER_SUPPLY_PROP_VOLTAGE_OCV,
142 POWER_SUPPLY_PROP_CURRENT_NOW,
143 POWER_SUPPLY_PROP_CAPACITY,
144 POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
145 POWER_SUPPLY_PROP_TECHNOLOGY,
146 POWER_SUPPLY_PROP_CHARGE_FULL,
147 POWER_SUPPLY_PROP_CHARGE_NOW,
148};
149
150static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
151{
152 int ret, i;
153 unsigned int val;
154
155 for (i = 0; i < NR_RETRY_CNT; i++) {
156 ret = regmap_read(info->regmap, reg, &val);
157 if (ret == -EBUSY)
158 continue;
159 else
160 break;
161 }
162
163 if (ret < 0) {
164 dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret);
165 return ret;
166 }
167
168 return val;
169}
170
171static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val)
172{
173 int ret;
174
175 ret = regmap_write(info->regmap, reg, (unsigned int)val);
176
177 if (ret < 0)
178 dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret);
179
180 return ret;
181}
182
183static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg)
184{
185 unsigned char buf[2];
186 int ret;
187
188 ret = regmap_bulk_read(info->regmap, reg, buf, 2);
189 if (ret < 0) {
190 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
191 reg, ret);
192 return ret;
193 }
194
195 ret = get_unaligned_be16(buf);
196 if (!(ret & FG_15BIT_WORD_VALID)) {
197 dev_err(&info->pdev->dev, "Error reg 0x%02x contents not valid\n",
198 reg);
199 return -ENXIO;
200 }
201
202 return ret & FG_15BIT_VAL_MASK;
203}
204
205static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg)
206{
207 unsigned char buf[2];
208 int ret;
209
210 ret = regmap_bulk_read(info->regmap, reg, buf, 2);
211 if (ret < 0) {
212 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
213 reg, ret);
214 return ret;
215 }
216
217
218 return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f);
219}
220
221#ifdef CONFIG_DEBUG_FS
222static int fuel_gauge_debug_show(struct seq_file *s, void *data)
223{
224 struct axp288_fg_info *info = s->private;
225 int raw_val, ret;
226
227 seq_printf(s, " PWR_STATUS[%02x] : %02x\n",
228 AXP20X_PWR_INPUT_STATUS,
229 fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS));
230 seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n",
231 AXP20X_PWR_OP_MODE,
232 fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE));
233 seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n",
234 AXP20X_CHRG_CTRL1,
235 fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1));
236 seq_printf(s, " VLTF[%02x] : %02x\n",
237 AXP20X_V_LTF_DISCHRG,
238 fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG));
239 seq_printf(s, " VHTF[%02x] : %02x\n",
240 AXP20X_V_HTF_DISCHRG,
241 fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG));
242 seq_printf(s, " CC_CTRL[%02x] : %02x\n",
243 AXP20X_CC_CTRL,
244 fuel_gauge_reg_readb(info, AXP20X_CC_CTRL));
245 seq_printf(s, "BATTERY CAP[%02x] : %02x\n",
246 AXP20X_FG_RES,
247 fuel_gauge_reg_readb(info, AXP20X_FG_RES));
248 seq_printf(s, " FG_RDC1[%02x] : %02x\n",
249 AXP288_FG_RDC1_REG,
250 fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG));
251 seq_printf(s, " FG_RDC0[%02x] : %02x\n",
252 AXP288_FG_RDC0_REG,
253 fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG));
254 seq_printf(s, " FG_OCV[%02x] : %04x\n",
255 AXP288_FG_OCVH_REG,
256 fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG));
257 seq_printf(s, " FG_DES_CAP[%02x] : %04x\n",
258 AXP288_FG_DES_CAP1_REG,
259 fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG));
260 seq_printf(s, " FG_CC_MTR[%02x] : %04x\n",
261 AXP288_FG_CC_MTR1_REG,
262 fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG));
263 seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n",
264 AXP288_FG_OCV_CAP_REG,
265 fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG));
266 seq_printf(s, " FG_CC_CAP[%02x] : %02x\n",
267 AXP288_FG_CC_CAP_REG,
268 fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG));
269 seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n",
270 AXP288_FG_LOW_CAP_REG,
271 fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG));
272 seq_printf(s, "TUNING_CTL0[%02x] : %02x\n",
273 AXP288_FG_TUNE0,
274 fuel_gauge_reg_readb(info, AXP288_FG_TUNE0));
275 seq_printf(s, "TUNING_CTL1[%02x] : %02x\n",
276 AXP288_FG_TUNE1,
277 fuel_gauge_reg_readb(info, AXP288_FG_TUNE1));
278 seq_printf(s, "TUNING_CTL2[%02x] : %02x\n",
279 AXP288_FG_TUNE2,
280 fuel_gauge_reg_readb(info, AXP288_FG_TUNE2));
281 seq_printf(s, "TUNING_CTL3[%02x] : %02x\n",
282 AXP288_FG_TUNE3,
283 fuel_gauge_reg_readb(info, AXP288_FG_TUNE3));
284 seq_printf(s, "TUNING_CTL4[%02x] : %02x\n",
285 AXP288_FG_TUNE4,
286 fuel_gauge_reg_readb(info, AXP288_FG_TUNE4));
287 seq_printf(s, "TUNING_CTL5[%02x] : %02x\n",
288 AXP288_FG_TUNE5,
289 fuel_gauge_reg_readb(info, AXP288_FG_TUNE5));
290
291 ret = iio_read_channel_raw(info->iio_channel[BAT_TEMP], &raw_val);
292 if (ret >= 0)
293 seq_printf(s, "axp288-batttemp : %d\n", raw_val);
294 ret = iio_read_channel_raw(info->iio_channel[PMIC_TEMP], &raw_val);
295 if (ret >= 0)
296 seq_printf(s, "axp288-pmictemp : %d\n", raw_val);
297 ret = iio_read_channel_raw(info->iio_channel[SYSTEM_TEMP], &raw_val);
298 if (ret >= 0)
299 seq_printf(s, "axp288-systtemp : %d\n", raw_val);
300 ret = iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], &raw_val);
301 if (ret >= 0)
302 seq_printf(s, "axp288-chrgcurr : %d\n", raw_val);
303 ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &raw_val);
304 if (ret >= 0)
305 seq_printf(s, "axp288-dchrgcur : %d\n", raw_val);
306 ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &raw_val);
307 if (ret >= 0)
308 seq_printf(s, "axp288-battvolt : %d\n", raw_val);
309
310 return 0;
311}
312
313static int debug_open(struct inode *inode, struct file *file)
314{
315 return single_open(file, fuel_gauge_debug_show, inode->i_private);
316}
317
318static const struct file_operations fg_debug_fops = {
319 .open = debug_open,
320 .read = seq_read,
321 .llseek = seq_lseek,
322 .release = single_release,
323};
324
325static void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
326{
327 info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL,
328 info, &fg_debug_fops);
329}
330
331static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
332{
333 debugfs_remove(info->debug_file);
334}
335#else
336static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
337{
338}
339static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
340{
341}
342#endif
343
344static void fuel_gauge_get_status(struct axp288_fg_info *info)
345{
346 int pwr_stat, fg_res, curr, ret;
347
348 pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
349 if (pwr_stat < 0) {
350 dev_err(&info->pdev->dev,
351 "PWR STAT read failed:%d\n", pwr_stat);
352 return;
353 }
354
355
356 if (!(pwr_stat & PS_STAT_VBUS_VALID))
357 goto not_full;
358
359 fg_res = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
360 if (fg_res < 0) {
361 dev_err(&info->pdev->dev, "FG RES read failed: %d\n", fg_res);
362 return;
363 }
364 if (!(fg_res & FG_REP_CAP_VALID))
365 goto not_full;
366
367 fg_res &= ~FG_REP_CAP_VALID;
368 if (fg_res == 100) {
369 info->status = POWER_SUPPLY_STATUS_FULL;
370 return;
371 }
372
373
374
375
376
377
378 if (fg_res < 90 || (pwr_stat & PS_STAT_BAT_CHRG_DIR))
379 goto not_full;
380
381 ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &curr);
382 if (ret < 0) {
383 dev_err(&info->pdev->dev, "FG get current failed: %d\n", ret);
384 return;
385 }
386 if (curr == 0) {
387 info->status = POWER_SUPPLY_STATUS_FULL;
388 return;
389 }
390
391not_full:
392 if (pwr_stat & PS_STAT_BAT_CHRG_DIR)
393 info->status = POWER_SUPPLY_STATUS_CHARGING;
394 else
395 info->status = POWER_SUPPLY_STATUS_DISCHARGING;
396}
397
398static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt)
399{
400 int ret = 0, raw_val;
401
402 ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &raw_val);
403 if (ret < 0)
404 goto vbatt_read_fail;
405
406 *vbatt = VOLTAGE_FROM_ADC(raw_val);
407vbatt_read_fail:
408 return ret;
409}
410
411static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur)
412{
413 int ret, discharge;
414
415
416 ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &discharge);
417 if (ret < 0)
418 return ret;
419
420 if (discharge > 0) {
421 *cur = -1 * discharge;
422 return 0;
423 }
424
425 return iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], cur);
426}
427
428static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv)
429{
430 int ret;
431
432 ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG);
433 if (ret >= 0)
434 *vocv = VOLTAGE_FROM_ADC(ret);
435
436 return ret;
437}
438
439static int fuel_gauge_battery_health(struct axp288_fg_info *info)
440{
441 int ret, vocv, health = POWER_SUPPLY_HEALTH_UNKNOWN;
442
443 ret = fuel_gauge_get_vocv(info, &vocv);
444 if (ret < 0)
445 goto health_read_fail;
446
447 if (vocv > info->max_volt)
448 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
449 else
450 health = POWER_SUPPLY_HEALTH_GOOD;
451
452health_read_fail:
453 return health;
454}
455
456static int fuel_gauge_get_property(struct power_supply *ps,
457 enum power_supply_property prop,
458 union power_supply_propval *val)
459{
460 struct axp288_fg_info *info = power_supply_get_drvdata(ps);
461 int ret = 0, value;
462
463 mutex_lock(&info->lock);
464 switch (prop) {
465 case POWER_SUPPLY_PROP_STATUS:
466 fuel_gauge_get_status(info);
467 val->intval = info->status;
468 break;
469 case POWER_SUPPLY_PROP_HEALTH:
470 val->intval = fuel_gauge_battery_health(info);
471 break;
472 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
473 ret = fuel_gauge_get_vbatt(info, &value);
474 if (ret < 0)
475 goto fuel_gauge_read_err;
476 val->intval = PROP_VOLT(value);
477 break;
478 case POWER_SUPPLY_PROP_VOLTAGE_OCV:
479 ret = fuel_gauge_get_vocv(info, &value);
480 if (ret < 0)
481 goto fuel_gauge_read_err;
482 val->intval = PROP_VOLT(value);
483 break;
484 case POWER_SUPPLY_PROP_CURRENT_NOW:
485 ret = fuel_gauge_get_current(info, &value);
486 if (ret < 0)
487 goto fuel_gauge_read_err;
488 val->intval = PROP_CURR(value);
489 break;
490 case POWER_SUPPLY_PROP_PRESENT:
491 ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE);
492 if (ret < 0)
493 goto fuel_gauge_read_err;
494
495 if (ret & CHRG_STAT_BAT_PRESENT)
496 val->intval = 1;
497 else
498 val->intval = 0;
499 break;
500 case POWER_SUPPLY_PROP_CAPACITY:
501 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
502 if (ret < 0)
503 goto fuel_gauge_read_err;
504
505 if (!(ret & FG_REP_CAP_VALID))
506 dev_err(&info->pdev->dev,
507 "capacity measurement not valid\n");
508 val->intval = (ret & FG_REP_CAP_VAL_MASK);
509 break;
510 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
511 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
512 if (ret < 0)
513 goto fuel_gauge_read_err;
514 val->intval = (ret & 0x0f);
515 break;
516 case POWER_SUPPLY_PROP_TECHNOLOGY:
517 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
518 break;
519 case POWER_SUPPLY_PROP_CHARGE_NOW:
520 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG);
521 if (ret < 0)
522 goto fuel_gauge_read_err;
523
524 val->intval = ret * FG_DES_CAP_RES_LSB;
525 break;
526 case POWER_SUPPLY_PROP_CHARGE_FULL:
527 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG);
528 if (ret < 0)
529 goto fuel_gauge_read_err;
530
531 val->intval = ret * FG_DES_CAP_RES_LSB;
532 break;
533 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
534 val->intval = PROP_VOLT(info->max_volt);
535 break;
536 default:
537 mutex_unlock(&info->lock);
538 return -EINVAL;
539 }
540
541 mutex_unlock(&info->lock);
542 return 0;
543
544fuel_gauge_read_err:
545 mutex_unlock(&info->lock);
546 return ret;
547}
548
549static int fuel_gauge_set_property(struct power_supply *ps,
550 enum power_supply_property prop,
551 const union power_supply_propval *val)
552{
553 struct axp288_fg_info *info = power_supply_get_drvdata(ps);
554 int ret = 0;
555
556 mutex_lock(&info->lock);
557 switch (prop) {
558 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
559 if ((val->intval < 0) || (val->intval > 15)) {
560 ret = -EINVAL;
561 break;
562 }
563 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
564 if (ret < 0)
565 break;
566 ret &= 0xf0;
567 ret |= (val->intval & 0xf);
568 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret);
569 break;
570 default:
571 ret = -EINVAL;
572 break;
573 }
574
575 mutex_unlock(&info->lock);
576 return ret;
577}
578
579static int fuel_gauge_property_is_writeable(struct power_supply *psy,
580 enum power_supply_property psp)
581{
582 int ret;
583
584 switch (psp) {
585 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
586 ret = 1;
587 break;
588 default:
589 ret = 0;
590 }
591
592 return ret;
593}
594
595static void fuel_gauge_status_monitor(struct work_struct *work)
596{
597 struct axp288_fg_info *info = container_of(work,
598 struct axp288_fg_info, status_monitor.work);
599
600 fuel_gauge_get_status(info);
601 power_supply_changed(info->bat);
602 schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
603}
604
605static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev)
606{
607 struct axp288_fg_info *info = dev;
608 int i;
609
610 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
611 if (info->irq[i] == irq)
612 break;
613 }
614
615 if (i >= AXP288_FG_INTR_NUM) {
616 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
617 return IRQ_NONE;
618 }
619
620 switch (i) {
621 case QWBTU_IRQ:
622 dev_info(&info->pdev->dev,
623 "Quit Battery under temperature in work mode IRQ (QWBTU)\n");
624 break;
625 case WBTU_IRQ:
626 dev_info(&info->pdev->dev,
627 "Battery under temperature in work mode IRQ (WBTU)\n");
628 break;
629 case QWBTO_IRQ:
630 dev_info(&info->pdev->dev,
631 "Quit Battery over temperature in work mode IRQ (QWBTO)\n");
632 break;
633 case WBTO_IRQ:
634 dev_info(&info->pdev->dev,
635 "Battery over temperature in work mode IRQ (WBTO)\n");
636 break;
637 case WL2_IRQ:
638 dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n");
639 break;
640 case WL1_IRQ:
641 dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n");
642 break;
643 default:
644 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
645 }
646
647 power_supply_changed(info->bat);
648 return IRQ_HANDLED;
649}
650
651static void fuel_gauge_external_power_changed(struct power_supply *psy)
652{
653 struct axp288_fg_info *info = power_supply_get_drvdata(psy);
654
655 power_supply_changed(info->bat);
656}
657
658static const struct power_supply_desc fuel_gauge_desc = {
659 .name = DEV_NAME,
660 .type = POWER_SUPPLY_TYPE_BATTERY,
661 .properties = fuel_gauge_props,
662 .num_properties = ARRAY_SIZE(fuel_gauge_props),
663 .get_property = fuel_gauge_get_property,
664 .set_property = fuel_gauge_set_property,
665 .property_is_writeable = fuel_gauge_property_is_writeable,
666 .external_power_changed = fuel_gauge_external_power_changed,
667};
668
669static void fuel_gauge_init_irq(struct axp288_fg_info *info)
670{
671 int ret, i, pirq;
672
673 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
674 pirq = platform_get_irq(info->pdev, i);
675 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
676 if (info->irq[i] < 0) {
677 dev_warn(&info->pdev->dev,
678 "regmap_irq get virq failed for IRQ %d: %d\n",
679 pirq, info->irq[i]);
680 info->irq[i] = -1;
681 goto intr_failed;
682 }
683 ret = request_threaded_irq(info->irq[i],
684 NULL, fuel_gauge_thread_handler,
685 IRQF_ONESHOT, DEV_NAME, info);
686 if (ret) {
687 dev_warn(&info->pdev->dev,
688 "request irq failed for IRQ %d: %d\n",
689 pirq, info->irq[i]);
690 info->irq[i] = -1;
691 goto intr_failed;
692 } else {
693 dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n",
694 pirq, info->irq[i]);
695 }
696 }
697 return;
698
699intr_failed:
700 for (; i > 0; i--) {
701 free_irq(info->irq[i - 1], info);
702 info->irq[i - 1] = -1;
703 }
704}
705
706
707
708
709
710static const struct dmi_system_id axp288_fuel_gauge_blacklist[] = {
711 {
712
713 .matches = {
714 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
715 DMI_MATCH(DMI_PRODUCT_NAME, "STK1AW32SC"),
716 },
717 },
718 {
719
720 .matches = {
721 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
722 DMI_MATCH(DMI_PRODUCT_NAME, "STK1A32SC"),
723 },
724 },
725 {
726
727 .matches = {
728 DMI_MATCH(DMI_SYS_VENDOR, "Default string"),
729 DMI_MATCH(DMI_BOARD_VENDOR, "To be filled by OEM."),
730 DMI_MATCH(DMI_BOARD_NAME, "T3 MRD"),
731 DMI_MATCH(DMI_BOARD_VERSION, "V1.1"),
732 },
733 },
734 {
735
736 .matches = {
737 DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
738 },
739 },
740 {}
741};
742
743static int axp288_fuel_gauge_probe(struct platform_device *pdev)
744{
745 int i, ret = 0;
746 struct axp288_fg_info *info;
747 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
748 struct power_supply_config psy_cfg = {};
749 static const char * const iio_chan_name[] = {
750 [BAT_TEMP] = "axp288-batt-temp",
751 [PMIC_TEMP] = "axp288-pmic-temp",
752 [SYSTEM_TEMP] = "axp288-system-temp",
753 [BAT_CHRG_CURR] = "axp288-chrg-curr",
754 [BAT_D_CURR] = "axp288-chrg-d-curr",
755 [BAT_VOLT] = "axp288-batt-volt",
756 };
757
758 if (dmi_check_system(axp288_fuel_gauge_blacklist))
759 return -ENODEV;
760
761 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
762 if (!info)
763 return -ENOMEM;
764
765 info->pdev = pdev;
766 info->regmap = axp20x->regmap;
767 info->regmap_irqc = axp20x->regmap_irqc;
768 info->status = POWER_SUPPLY_STATUS_UNKNOWN;
769
770 platform_set_drvdata(pdev, info);
771
772 mutex_init(&info->lock);
773 INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor);
774
775 for (i = 0; i < IIO_CHANNEL_NUM; i++) {
776
777
778
779
780
781 info->iio_channel[i] =
782 iio_channel_get(NULL, iio_chan_name[i]);
783 if (IS_ERR(info->iio_channel[i])) {
784 ret = PTR_ERR(info->iio_channel[i]);
785 dev_dbg(&pdev->dev, "error getting iiochan %s: %d\n",
786 iio_chan_name[i], ret);
787
788 if (ret == -ENODEV)
789 ret = -EPROBE_DEFER;
790
791 goto out_free_iio_chan;
792 }
793 }
794
795 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
796 if (ret < 0)
797 goto out_free_iio_chan;
798
799 if (!(ret & FG_DES_CAP1_VALID)) {
800 dev_err(&pdev->dev, "axp288 not configured by firmware\n");
801 ret = -ENODEV;
802 goto out_free_iio_chan;
803 }
804
805 ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
806 if (ret < 0)
807 goto out_free_iio_chan;
808 switch ((ret & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS) {
809 case CHRG_CCCV_CV_4100MV:
810 info->max_volt = 4100;
811 break;
812 case CHRG_CCCV_CV_4150MV:
813 info->max_volt = 4150;
814 break;
815 case CHRG_CCCV_CV_4200MV:
816 info->max_volt = 4200;
817 break;
818 case CHRG_CCCV_CV_4350MV:
819 info->max_volt = 4350;
820 break;
821 }
822
823 psy_cfg.drv_data = info;
824 info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg);
825 if (IS_ERR(info->bat)) {
826 ret = PTR_ERR(info->bat);
827 dev_err(&pdev->dev, "failed to register battery: %d\n", ret);
828 goto out_free_iio_chan;
829 }
830
831 fuel_gauge_create_debugfs(info);
832 fuel_gauge_init_irq(info);
833 schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
834
835 return 0;
836
837out_free_iio_chan:
838 for (i = 0; i < IIO_CHANNEL_NUM; i++)
839 if (!IS_ERR_OR_NULL(info->iio_channel[i]))
840 iio_channel_release(info->iio_channel[i]);
841
842 return ret;
843}
844
845static const struct platform_device_id axp288_fg_id_table[] = {
846 { .name = DEV_NAME },
847 {},
848};
849MODULE_DEVICE_TABLE(platform, axp288_fg_id_table);
850
851static int axp288_fuel_gauge_remove(struct platform_device *pdev)
852{
853 struct axp288_fg_info *info = platform_get_drvdata(pdev);
854 int i;
855
856 cancel_delayed_work_sync(&info->status_monitor);
857 power_supply_unregister(info->bat);
858 fuel_gauge_remove_debugfs(info);
859
860 for (i = 0; i < AXP288_FG_INTR_NUM; i++)
861 if (info->irq[i] >= 0)
862 free_irq(info->irq[i], info);
863
864 for (i = 0; i < IIO_CHANNEL_NUM; i++)
865 iio_channel_release(info->iio_channel[i]);
866
867 return 0;
868}
869
870static struct platform_driver axp288_fuel_gauge_driver = {
871 .probe = axp288_fuel_gauge_probe,
872 .remove = axp288_fuel_gauge_remove,
873 .id_table = axp288_fg_id_table,
874 .driver = {
875 .name = DEV_NAME,
876 },
877};
878
879module_platform_driver(axp288_fuel_gauge_driver);
880
881MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
882MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>");
883MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver");
884MODULE_LICENSE("GPL");
885
