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Merge branch 'stable/for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel...
[karo-tx-linux.git] / drivers / power / axp288_fuel_gauge.c
1 /*
2  * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver
3  *
4  * Copyright (C) 2014 Intel Corporation
5  *
6  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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 as published by
10  * the Free Software Foundation; version 2 of the License.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
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/device.h>
26 #include <linux/workqueue.h>
27 #include <linux/mfd/axp20x.h>
28 #include <linux/platform_device.h>
29 #include <linux/power_supply.h>
30 #include <linux/iio/consumer.h>
31 #include <linux/debugfs.h>
32 #include <linux/seq_file.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     /* 4 bits */
41 #define CHRG_CCCV_CC_BIT_POS            0
42 #define CHRG_CCCV_CC_OFFSET                     200     /* 200mA */
43 #define CHRG_CCCV_CC_LSB_RES            200     /* 200mA */
44 #define CHRG_CCCV_ITERM_20P                     (1 << 4)    /* 20% of CC */
45 #define CHRG_CCCV_CV_MASK                       0x60        /* 2 bits */
46 #define CHRG_CCCV_CV_BIT_POS            5
47 #define CHRG_CCCV_CV_4100MV                     0x0     /* 4.10V */
48 #define CHRG_CCCV_CV_4150MV                     0x1     /* 4.15V */
49 #define CHRG_CCCV_CV_4200MV                     0x2     /* 4.20V */
50 #define CHRG_CCCV_CV_4350MV                     0x3     /* 4.35V */
51 #define CHRG_CCCV_CHG_EN                        (1 << 7)
52
53 #define CV_4100                                         4100    /* 4100mV */
54 #define CV_4150                                         4150    /* 4150mV */
55 #define CV_4200                                         4200    /* 4200mV */
56 #define CV_4350                                         4350    /* 4350mV */
57
58 #define TEMP_IRQ_CFG_QWBTU                      (1 << 0)
59 #define TEMP_IRQ_CFG_WBTU                       (1 << 1)
60 #define TEMP_IRQ_CFG_QWBTO                      (1 << 2)
61 #define TEMP_IRQ_CFG_WBTO                       (1 << 3)
62 #define TEMP_IRQ_CFG_MASK                       0xf
63
64 #define FG_IRQ_CFG_LOWBATT_WL2          (1 << 0)
65 #define FG_IRQ_CFG_LOWBATT_WL1          (1 << 1)
66 #define FG_IRQ_CFG_LOWBATT_MASK         0x3
67 #define LOWBAT_IRQ_STAT_LOWBATT_WL2     (1 << 0)
68 #define LOWBAT_IRQ_STAT_LOWBATT_WL1     (1 << 1)
69
70 #define FG_CNTL_OCV_ADJ_STAT            (1 << 2)
71 #define FG_CNTL_OCV_ADJ_EN                      (1 << 3)
72 #define FG_CNTL_CAP_ADJ_STAT            (1 << 4)
73 #define FG_CNTL_CAP_ADJ_EN                      (1 << 5)
74 #define FG_CNTL_CC_EN                           (1 << 6)
75 #define FG_CNTL_GAUGE_EN                        (1 << 7)
76
77 #define FG_REP_CAP_VALID                        (1 << 7)
78 #define FG_REP_CAP_VAL_MASK                     0x7F
79
80 #define FG_DES_CAP1_VALID                       (1 << 7)
81 #define FG_DES_CAP1_VAL_MASK            0x7F
82 #define FG_DES_CAP0_VAL_MASK            0xFF
83 #define FG_DES_CAP_RES_LSB                      1456    /* 1.456mAhr */
84
85 #define FG_CC_MTR1_VALID                        (1 << 7)
86 #define FG_CC_MTR1_VAL_MASK                     0x7F
87 #define FG_CC_MTR0_VAL_MASK                     0xFF
88 #define FG_DES_CC_RES_LSB                       1456    /* 1.456mAhr */
89
90 #define FG_OCV_CAP_VALID                        (1 << 7)
91 #define FG_OCV_CAP_VAL_MASK                     0x7F
92 #define FG_CC_CAP_VALID                         (1 << 7)
93 #define FG_CC_CAP_VAL_MASK                      0x7F
94
95 #define FG_LOW_CAP_THR1_MASK            0xf0    /* 5% tp 20% */
96 #define FG_LOW_CAP_THR1_VAL                     0xa0    /* 15 perc */
97 #define FG_LOW_CAP_THR2_MASK            0x0f    /* 0% to 15% */
98 #define FG_LOW_CAP_WARN_THR                     14  /* 14 perc */
99 #define FG_LOW_CAP_CRIT_THR                     4   /* 4 perc */
100 #define FG_LOW_CAP_SHDN_THR                     0   /* 0 perc */
101
102 #define STATUS_MON_DELAY_JIFFIES    (HZ * 60)   /*60 sec */
103 #define NR_RETRY_CNT    3
104 #define DEV_NAME        "axp288_fuel_gauge"
105
106 /* 1.1mV per LSB expressed in uV */
107 #define VOLTAGE_FROM_ADC(a)                     ((a * 11) / 10)
108 /* properties converted to tenths of degrees, uV, uA, uW */
109 #define PROP_TEMP(a)            ((a) * 10)
110 #define UNPROP_TEMP(a)          ((a) / 10)
111 #define PROP_VOLT(a)            ((a) * 1000)
112 #define PROP_CURR(a)            ((a) * 1000)
113
114 #define AXP288_FG_INTR_NUM      6
115 enum {
116         QWBTU_IRQ = 0,
117         WBTU_IRQ,
118         QWBTO_IRQ,
119         WBTO_IRQ,
120         WL2_IRQ,
121         WL1_IRQ,
122 };
123
124 struct axp288_fg_info {
125         struct platform_device *pdev;
126         struct axp20x_fg_pdata *pdata;
127         struct regmap *regmap;
128         struct regmap_irq_chip_data *regmap_irqc;
129         int irq[AXP288_FG_INTR_NUM];
130         struct power_supply *bat;
131         struct mutex lock;
132         int status;
133         struct delayed_work status_monitor;
134         struct dentry *debug_file;
135 };
136
137 static enum power_supply_property fuel_gauge_props[] = {
138         POWER_SUPPLY_PROP_STATUS,
139         POWER_SUPPLY_PROP_PRESENT,
140         POWER_SUPPLY_PROP_HEALTH,
141         POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
142         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
143         POWER_SUPPLY_PROP_VOLTAGE_NOW,
144         POWER_SUPPLY_PROP_VOLTAGE_OCV,
145         POWER_SUPPLY_PROP_CURRENT_NOW,
146         POWER_SUPPLY_PROP_CAPACITY,
147         POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
148         POWER_SUPPLY_PROP_TEMP,
149         POWER_SUPPLY_PROP_TEMP_MAX,
150         POWER_SUPPLY_PROP_TEMP_MIN,
151         POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
152         POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
153         POWER_SUPPLY_PROP_TECHNOLOGY,
154         POWER_SUPPLY_PROP_CHARGE_FULL,
155         POWER_SUPPLY_PROP_CHARGE_NOW,
156         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
157         POWER_SUPPLY_PROP_MODEL_NAME,
158 };
159
160 static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
161 {
162         int ret, i;
163         unsigned int val;
164
165         for (i = 0; i < NR_RETRY_CNT; i++) {
166                 ret = regmap_read(info->regmap, reg, &val);
167                 if (ret == -EBUSY)
168                         continue;
169                 else
170                         break;
171         }
172
173         if (ret < 0)
174                 dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret);
175
176         return val;
177 }
178
179 static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val)
180 {
181         int ret;
182
183         ret = regmap_write(info->regmap, reg, (unsigned int)val);
184
185         if (ret < 0)
186                 dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret);
187
188         return ret;
189 }
190
191 static int pmic_read_adc_val(const char *name, int *raw_val,
192                 struct axp288_fg_info *info)
193 {
194         int ret, val = 0;
195         struct iio_channel *indio_chan;
196
197         indio_chan = iio_channel_get(NULL, name);
198         if (IS_ERR_OR_NULL(indio_chan)) {
199                 ret = PTR_ERR(indio_chan);
200                 goto exit;
201         }
202         ret = iio_read_channel_raw(indio_chan, &val);
203         if (ret < 0) {
204                 dev_err(&info->pdev->dev,
205                         "IIO channel read error: %x, %x\n", ret, val);
206                 goto err_exit;
207         }
208
209         dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val);
210         *raw_val = val;
211
212 err_exit:
213         iio_channel_release(indio_chan);
214 exit:
215         return ret;
216 }
217
218 #ifdef CONFIG_DEBUG_FS
219 static int fuel_gauge_debug_show(struct seq_file *s, void *data)
220 {
221         struct axp288_fg_info *info = s->private;
222         int raw_val, ret;
223
224         seq_printf(s, " PWR_STATUS[%02x] : %02x\n",
225                 AXP20X_PWR_INPUT_STATUS,
226                 fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS));
227         seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n",
228                 AXP20X_PWR_OP_MODE,
229                 fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE));
230         seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n",
231                 AXP20X_CHRG_CTRL1,
232                 fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1));
233         seq_printf(s, "       VLTF[%02x] : %02x\n",
234                 AXP20X_V_LTF_DISCHRG,
235                 fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG));
236         seq_printf(s, "       VHTF[%02x] : %02x\n",
237                 AXP20X_V_HTF_DISCHRG,
238                 fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG));
239         seq_printf(s, "    CC_CTRL[%02x] : %02x\n",
240                 AXP20X_CC_CTRL,
241                 fuel_gauge_reg_readb(info, AXP20X_CC_CTRL));
242         seq_printf(s, "BATTERY CAP[%02x] : %02x\n",
243                 AXP20X_FG_RES,
244                 fuel_gauge_reg_readb(info, AXP20X_FG_RES));
245         seq_printf(s, "    FG_RDC1[%02x] : %02x\n",
246                 AXP288_FG_RDC1_REG,
247                 fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG));
248         seq_printf(s, "    FG_RDC0[%02x] : %02x\n",
249                 AXP288_FG_RDC0_REG,
250                 fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG));
251         seq_printf(s, "    FG_OCVH[%02x] : %02x\n",
252                 AXP288_FG_OCVH_REG,
253                 fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG));
254         seq_printf(s, "    FG_OCVL[%02x] : %02x\n",
255                 AXP288_FG_OCVL_REG,
256                 fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG));
257         seq_printf(s, "FG_DES_CAP1[%02x] : %02x\n",
258                 AXP288_FG_DES_CAP1_REG,
259                 fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG));
260         seq_printf(s, "FG_DES_CAP0[%02x] : %02x\n",
261                 AXP288_FG_DES_CAP0_REG,
262                 fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG));
263         seq_printf(s, " FG_CC_MTR1[%02x] : %02x\n",
264                 AXP288_FG_CC_MTR1_REG,
265                 fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG));
266         seq_printf(s, " FG_CC_MTR0[%02x] : %02x\n",
267                 AXP288_FG_CC_MTR0_REG,
268                 fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG));
269         seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n",
270                 AXP288_FG_OCV_CAP_REG,
271                 fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG));
272         seq_printf(s, "  FG_CC_CAP[%02x] : %02x\n",
273                 AXP288_FG_CC_CAP_REG,
274                 fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG));
275         seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n",
276                 AXP288_FG_LOW_CAP_REG,
277                 fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG));
278         seq_printf(s, "TUNING_CTL0[%02x] : %02x\n",
279                 AXP288_FG_TUNE0,
280                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE0));
281         seq_printf(s, "TUNING_CTL1[%02x] : %02x\n",
282                 AXP288_FG_TUNE1,
283                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE1));
284         seq_printf(s, "TUNING_CTL2[%02x] : %02x\n",
285                 AXP288_FG_TUNE2,
286                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE2));
287         seq_printf(s, "TUNING_CTL3[%02x] : %02x\n",
288                 AXP288_FG_TUNE3,
289                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE3));
290         seq_printf(s, "TUNING_CTL4[%02x] : %02x\n",
291                 AXP288_FG_TUNE4,
292                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE4));
293         seq_printf(s, "TUNING_CTL5[%02x] : %02x\n",
294                 AXP288_FG_TUNE5,
295                 fuel_gauge_reg_readb(info, AXP288_FG_TUNE5));
296
297         ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
298         if (ret >= 0)
299                 seq_printf(s, "axp288-batttemp : %d\n", raw_val);
300         ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info);
301         if (ret >= 0)
302                 seq_printf(s, "axp288-pmictemp : %d\n", raw_val);
303         ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info);
304         if (ret >= 0)
305                 seq_printf(s, "axp288-systtemp : %d\n", raw_val);
306         ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info);
307         if (ret >= 0)
308                 seq_printf(s, "axp288-chrgcurr : %d\n", raw_val);
309         ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info);
310         if (ret >= 0)
311                 seq_printf(s, "axp288-dchrgcur : %d\n", raw_val);
312         ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
313         if (ret >= 0)
314                 seq_printf(s, "axp288-battvolt : %d\n", raw_val);
315
316         return 0;
317 }
318
319 static int debug_open(struct inode *inode, struct file *file)
320 {
321         return single_open(file, fuel_gauge_debug_show, inode->i_private);
322 }
323
324 static const struct file_operations fg_debug_fops = {
325         .open       = debug_open,
326         .read       = seq_read,
327         .llseek     = seq_lseek,
328         .release    = single_release,
329 };
330
331 static void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
332 {
333         info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL,
334                 info, &fg_debug_fops);
335 }
336
337 static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
338 {
339         debugfs_remove(info->debug_file);
340 }
341 #else
342 static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
343 {
344 }
345 static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
346 {
347 }
348 #endif
349
350 static void fuel_gauge_get_status(struct axp288_fg_info *info)
351 {
352         int pwr_stat, ret;
353         int charge, discharge;
354
355         pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
356         if (pwr_stat < 0) {
357                 dev_err(&info->pdev->dev,
358                         "PWR STAT read failed:%d\n", pwr_stat);
359                 return;
360         }
361         ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
362         if (ret < 0) {
363                 dev_err(&info->pdev->dev,
364                         "ADC charge current read failed:%d\n", ret);
365                 return;
366         }
367         ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
368         if (ret < 0) {
369                 dev_err(&info->pdev->dev,
370                         "ADC discharge current read failed:%d\n", ret);
371                 return;
372         }
373
374         if (charge > 0)
375                 info->status = POWER_SUPPLY_STATUS_CHARGING;
376         else if (discharge > 0)
377                 info->status = POWER_SUPPLY_STATUS_DISCHARGING;
378         else {
379                 if (pwr_stat & CHRG_STAT_BAT_PRESENT)
380                         info->status = POWER_SUPPLY_STATUS_FULL;
381                 else
382                         info->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
383         }
384 }
385
386 static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt)
387 {
388         int ret = 0, raw_val;
389
390         ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
391         if (ret < 0)
392                 goto vbatt_read_fail;
393
394         *vbatt = VOLTAGE_FROM_ADC(raw_val);
395 vbatt_read_fail:
396         return ret;
397 }
398
399 static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur)
400 {
401         int ret, value = 0;
402         int charge, discharge;
403
404         ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
405         if (ret < 0)
406                 goto current_read_fail;
407         ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
408         if (ret < 0)
409                 goto current_read_fail;
410
411         if (charge > 0)
412                 value = charge;
413         else if (discharge > 0)
414                 value = -1 * discharge;
415
416         *cur = value;
417 current_read_fail:
418         return ret;
419 }
420
421 static int temp_to_adc(struct axp288_fg_info *info, int tval)
422 {
423         int rntc = 0, i, ret, adc_val;
424         int rmin, rmax, tmin, tmax;
425         int tcsz = info->pdata->tcsz;
426
427         /* get the Rntc resitance value for this temp */
428         if (tval > info->pdata->thermistor_curve[0][1]) {
429                 rntc = info->pdata->thermistor_curve[0][0];
430         } else if (tval <= info->pdata->thermistor_curve[tcsz-1][1]) {
431                 rntc = info->pdata->thermistor_curve[tcsz-1][0];
432         } else {
433                 for (i = 1; i < tcsz; i++) {
434                         if (tval > info->pdata->thermistor_curve[i][1]) {
435                                 rmin = info->pdata->thermistor_curve[i-1][0];
436                                 rmax = info->pdata->thermistor_curve[i][0];
437                                 tmin = info->pdata->thermistor_curve[i-1][1];
438                                 tmax = info->pdata->thermistor_curve[i][1];
439                                 rntc = rmin + ((rmax - rmin) *
440                                         (tval - tmin) / (tmax - tmin));
441                                 break;
442                         }
443                 }
444         }
445
446         /* we need the current to calculate the proper adc voltage */
447         ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE);
448         if (ret < 0) {
449                 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
450                 ret = 0x30;
451         }
452
453         /*
454          * temperature is proportional to NTS thermistor resistance
455          * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA
456          * [12-bit ADC VAL] = R_NTC(Ω) * current / 800
457          */
458         adc_val = rntc * (20 + (20 * ((ret >> 4) & 0x3))) / 800;
459
460         return adc_val;
461 }
462
463 static int adc_to_temp(struct axp288_fg_info *info, int adc_val)
464 {
465         int ret, r, i, tval = 0;
466         int rmin, rmax, tmin, tmax;
467         int tcsz = info->pdata->tcsz;
468
469         ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE);
470         if (ret < 0) {
471                 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
472                 ret = 0x30;
473         }
474
475         /*
476          * temperature is proportional to NTS thermistor resistance
477          * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA
478          * R_NTC(Ω) = [12-bit ADC VAL] * 800 / current
479          */
480         r = adc_val * 800 / (20 + (20 * ((ret >> 4) & 0x3)));
481
482         if (r < info->pdata->thermistor_curve[0][0]) {
483                 tval = info->pdata->thermistor_curve[0][1];
484         } else if (r >= info->pdata->thermistor_curve[tcsz-1][0]) {
485                 tval = info->pdata->thermistor_curve[tcsz-1][1];
486         } else {
487                 for (i = 1; i < tcsz; i++) {
488                         if (r < info->pdata->thermistor_curve[i][0]) {
489                                 rmin = info->pdata->thermistor_curve[i-1][0];
490                                 rmax = info->pdata->thermistor_curve[i][0];
491                                 tmin = info->pdata->thermistor_curve[i-1][1];
492                                 tmax = info->pdata->thermistor_curve[i][1];
493                                 tval = tmin + ((tmax - tmin) *
494                                         (r - rmin) / (rmax - rmin));
495                                 break;
496                         }
497                 }
498         }
499
500         return tval;
501 }
502
503 static int fuel_gauge_get_btemp(struct axp288_fg_info *info, int *btemp)
504 {
505         int ret, raw_val = 0;
506
507         ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
508         if (ret < 0)
509                 goto temp_read_fail;
510
511         *btemp = adc_to_temp(info, raw_val);
512
513 temp_read_fail:
514         return ret;
515 }
516
517 static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv)
518 {
519         int ret, value;
520
521         /* 12-bit data value, upper 8 in OCVH, lower 4 in OCVL */
522         ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG);
523         if (ret < 0)
524                 goto vocv_read_fail;
525         value = ret << 4;
526
527         ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG);
528         if (ret < 0)
529                 goto vocv_read_fail;
530         value |= (ret & 0xf);
531
532         *vocv = VOLTAGE_FROM_ADC(value);
533 vocv_read_fail:
534         return ret;
535 }
536
537 static int fuel_gauge_battery_health(struct axp288_fg_info *info)
538 {
539         int temp, vocv;
540         int ret, health = POWER_SUPPLY_HEALTH_UNKNOWN;
541
542         ret = fuel_gauge_get_btemp(info, &temp);
543         if (ret < 0)
544                 goto health_read_fail;
545
546         ret = fuel_gauge_get_vocv(info, &vocv);
547         if (ret < 0)
548                 goto health_read_fail;
549
550         if (vocv > info->pdata->max_volt)
551                 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
552         else if (temp > info->pdata->max_temp)
553                 health = POWER_SUPPLY_HEALTH_OVERHEAT;
554         else if (temp < info->pdata->min_temp)
555                 health = POWER_SUPPLY_HEALTH_COLD;
556         else if (vocv < info->pdata->min_volt)
557                 health = POWER_SUPPLY_HEALTH_DEAD;
558         else
559                 health = POWER_SUPPLY_HEALTH_GOOD;
560
561 health_read_fail:
562         return health;
563 }
564
565 static int fuel_gauge_set_high_btemp_alert(struct axp288_fg_info *info)
566 {
567         int ret, adc_val;
568
569         /* program temperature threshold as 1/16 ADC value */
570         adc_val = temp_to_adc(info, info->pdata->max_temp);
571         ret = fuel_gauge_reg_writeb(info, AXP20X_V_HTF_DISCHRG, adc_val >> 4);
572
573         return ret;
574 }
575
576 static int fuel_gauge_set_low_btemp_alert(struct axp288_fg_info *info)
577 {
578         int ret, adc_val;
579
580         /* program temperature threshold as 1/16 ADC value */
581         adc_val = temp_to_adc(info, info->pdata->min_temp);
582         ret = fuel_gauge_reg_writeb(info, AXP20X_V_LTF_DISCHRG, adc_val >> 4);
583
584         return ret;
585 }
586
587 static int fuel_gauge_get_property(struct power_supply *ps,
588                 enum power_supply_property prop,
589                 union power_supply_propval *val)
590 {
591         struct axp288_fg_info *info = power_supply_get_drvdata(ps);
592         int ret = 0, value;
593
594         mutex_lock(&info->lock);
595         switch (prop) {
596         case POWER_SUPPLY_PROP_STATUS:
597                 fuel_gauge_get_status(info);
598                 val->intval = info->status;
599                 break;
600         case POWER_SUPPLY_PROP_HEALTH:
601                 val->intval = fuel_gauge_battery_health(info);
602                 break;
603         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
604                 ret = fuel_gauge_get_vbatt(info, &value);
605                 if (ret < 0)
606                         goto fuel_gauge_read_err;
607                 val->intval = PROP_VOLT(value);
608                 break;
609         case POWER_SUPPLY_PROP_VOLTAGE_OCV:
610                 ret = fuel_gauge_get_vocv(info, &value);
611                 if (ret < 0)
612                         goto fuel_gauge_read_err;
613                 val->intval = PROP_VOLT(value);
614                 break;
615         case POWER_SUPPLY_PROP_CURRENT_NOW:
616                 ret = fuel_gauge_get_current(info, &value);
617                 if (ret < 0)
618                         goto fuel_gauge_read_err;
619                 val->intval = PROP_CURR(value);
620                 break;
621         case POWER_SUPPLY_PROP_PRESENT:
622                 ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE);
623                 if (ret < 0)
624                         goto fuel_gauge_read_err;
625
626                 if (ret & CHRG_STAT_BAT_PRESENT)
627                         val->intval = 1;
628                 else
629                         val->intval = 0;
630                 break;
631         case POWER_SUPPLY_PROP_CAPACITY:
632                 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
633                 if (ret < 0)
634                         goto fuel_gauge_read_err;
635
636                 if (!(ret & FG_REP_CAP_VALID))
637                         dev_err(&info->pdev->dev,
638                                 "capacity measurement not valid\n");
639                 val->intval = (ret & FG_REP_CAP_VAL_MASK);
640                 break;
641         case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
642                 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
643                 if (ret < 0)
644                         goto fuel_gauge_read_err;
645                 val->intval = (ret & 0x0f);
646                 break;
647         case POWER_SUPPLY_PROP_TEMP:
648                 ret = fuel_gauge_get_btemp(info, &value);
649                 if (ret < 0)
650                         goto fuel_gauge_read_err;
651                 val->intval = PROP_TEMP(value);
652                 break;
653         case POWER_SUPPLY_PROP_TEMP_MAX:
654         case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
655                 val->intval = PROP_TEMP(info->pdata->max_temp);
656                 break;
657         case POWER_SUPPLY_PROP_TEMP_MIN:
658         case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
659                 val->intval = PROP_TEMP(info->pdata->min_temp);
660                 break;
661         case POWER_SUPPLY_PROP_TECHNOLOGY:
662                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
663                 break;
664         case POWER_SUPPLY_PROP_CHARGE_NOW:
665                 ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG);
666                 if (ret < 0)
667                         goto fuel_gauge_read_err;
668
669                 value = (ret & FG_CC_MTR1_VAL_MASK) << 8;
670                 ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG);
671                 if (ret < 0)
672                         goto fuel_gauge_read_err;
673                 value |= (ret & FG_CC_MTR0_VAL_MASK);
674                 val->intval = value * FG_DES_CAP_RES_LSB;
675                 break;
676         case POWER_SUPPLY_PROP_CHARGE_FULL:
677                 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
678                 if (ret < 0)
679                         goto fuel_gauge_read_err;
680
681                 value = (ret & FG_DES_CAP1_VAL_MASK) << 8;
682                 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG);
683                 if (ret < 0)
684                         goto fuel_gauge_read_err;
685                 value |= (ret & FG_DES_CAP0_VAL_MASK);
686                 val->intval = value * FG_DES_CAP_RES_LSB;
687                 break;
688         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
689                 val->intval = PROP_CURR(info->pdata->design_cap);
690                 break;
691         case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
692                 val->intval = PROP_VOLT(info->pdata->max_volt);
693                 break;
694         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
695                 val->intval = PROP_VOLT(info->pdata->min_volt);
696                 break;
697         case POWER_SUPPLY_PROP_MODEL_NAME:
698                 val->strval = info->pdata->battid;
699                 break;
700         default:
701                 mutex_unlock(&info->lock);
702                 return -EINVAL;
703         }
704
705         mutex_unlock(&info->lock);
706         return 0;
707
708 fuel_gauge_read_err:
709         mutex_unlock(&info->lock);
710         return ret;
711 }
712
713 static int fuel_gauge_set_property(struct power_supply *ps,
714                 enum power_supply_property prop,
715                 const union power_supply_propval *val)
716 {
717         struct axp288_fg_info *info = power_supply_get_drvdata(ps);
718         int ret = 0;
719
720         mutex_lock(&info->lock);
721         switch (prop) {
722         case POWER_SUPPLY_PROP_STATUS:
723                 info->status = val->intval;
724                 break;
725         case POWER_SUPPLY_PROP_TEMP_MIN:
726         case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
727                 if ((val->intval < PD_DEF_MIN_TEMP) ||
728                         (val->intval > PD_DEF_MAX_TEMP)) {
729                         ret = -EINVAL;
730                         break;
731                 }
732                 info->pdata->min_temp = UNPROP_TEMP(val->intval);
733                 ret = fuel_gauge_set_low_btemp_alert(info);
734                 if (ret < 0)
735                         dev_err(&info->pdev->dev,
736                                 "temp alert min set fail:%d\n", ret);
737                 break;
738         case POWER_SUPPLY_PROP_TEMP_MAX:
739         case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
740                 if ((val->intval < PD_DEF_MIN_TEMP) ||
741                         (val->intval > PD_DEF_MAX_TEMP)) {
742                         ret = -EINVAL;
743                         break;
744                 }
745                 info->pdata->max_temp = UNPROP_TEMP(val->intval);
746                 ret = fuel_gauge_set_high_btemp_alert(info);
747                 if (ret < 0)
748                         dev_err(&info->pdev->dev,
749                                 "temp alert max set fail:%d\n", ret);
750                 break;
751         case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
752                 if ((val->intval < 0) || (val->intval > 15)) {
753                         ret = -EINVAL;
754                         break;
755                 }
756                 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
757                 if (ret < 0)
758                         break;
759                 ret &= 0xf0;
760                 ret |= (val->intval & 0xf);
761                 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret);
762                 break;
763         default:
764                 ret = -EINVAL;
765                 break;
766         }
767
768         mutex_unlock(&info->lock);
769         return ret;
770 }
771
772 static int fuel_gauge_property_is_writeable(struct power_supply *psy,
773         enum power_supply_property psp)
774 {
775         int ret;
776
777         switch (psp) {
778         case POWER_SUPPLY_PROP_STATUS:
779         case POWER_SUPPLY_PROP_TEMP_MIN:
780         case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
781         case POWER_SUPPLY_PROP_TEMP_MAX:
782         case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
783         case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
784                 ret = 1;
785                 break;
786         default:
787                 ret = 0;
788         }
789
790         return ret;
791 }
792
793 static void fuel_gauge_status_monitor(struct work_struct *work)
794 {
795         struct axp288_fg_info *info = container_of(work,
796                 struct axp288_fg_info, status_monitor.work);
797
798         fuel_gauge_get_status(info);
799         power_supply_changed(info->bat);
800         schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
801 }
802
803 static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev)
804 {
805         struct axp288_fg_info *info = dev;
806         int i;
807
808         for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
809                 if (info->irq[i] == irq)
810                         break;
811         }
812
813         if (i >= AXP288_FG_INTR_NUM) {
814                 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
815                 return IRQ_NONE;
816         }
817
818         switch (i) {
819         case QWBTU_IRQ:
820                 dev_info(&info->pdev->dev,
821                         "Quit Battery under temperature in work mode IRQ (QWBTU)\n");
822                 break;
823         case WBTU_IRQ:
824                 dev_info(&info->pdev->dev,
825                         "Battery under temperature in work mode IRQ (WBTU)\n");
826                 break;
827         case QWBTO_IRQ:
828                 dev_info(&info->pdev->dev,
829                         "Quit Battery over temperature in work mode IRQ (QWBTO)\n");
830                 break;
831         case WBTO_IRQ:
832                 dev_info(&info->pdev->dev,
833                         "Battery over temperature in work mode IRQ (WBTO)\n");
834                 break;
835         case WL2_IRQ:
836                 dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n");
837                 break;
838         case WL1_IRQ:
839                 dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n");
840                 break;
841         default:
842                 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
843         }
844
845         power_supply_changed(info->bat);
846         return IRQ_HANDLED;
847 }
848
849 static void fuel_gauge_external_power_changed(struct power_supply *psy)
850 {
851         struct axp288_fg_info *info = power_supply_get_drvdata(psy);
852
853         power_supply_changed(info->bat);
854 }
855
856 static const struct power_supply_desc fuel_gauge_desc = {
857         .name                   = DEV_NAME,
858         .type                   = POWER_SUPPLY_TYPE_BATTERY,
859         .properties             = fuel_gauge_props,
860         .num_properties         = ARRAY_SIZE(fuel_gauge_props),
861         .get_property           = fuel_gauge_get_property,
862         .set_property           = fuel_gauge_set_property,
863         .property_is_writeable  = fuel_gauge_property_is_writeable,
864         .external_power_changed = fuel_gauge_external_power_changed,
865 };
866
867 static int fuel_gauge_set_lowbatt_thresholds(struct axp288_fg_info *info)
868 {
869         int ret;
870         u8 reg_val;
871
872         ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
873         if (ret < 0) {
874                 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
875                 return ret;
876         }
877         ret = (ret & FG_REP_CAP_VAL_MASK);
878
879         if (ret > FG_LOW_CAP_WARN_THR)
880                 reg_val = FG_LOW_CAP_WARN_THR;
881         else if (ret > FG_LOW_CAP_CRIT_THR)
882                 reg_val = FG_LOW_CAP_CRIT_THR;
883         else
884                 reg_val = FG_LOW_CAP_SHDN_THR;
885
886         reg_val |= FG_LOW_CAP_THR1_VAL;
887         ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, reg_val);
888         if (ret < 0)
889                 dev_err(&info->pdev->dev, "%s:write err:%d\n", __func__, ret);
890
891         return ret;
892 }
893
894 static int fuel_gauge_program_vbatt_full(struct axp288_fg_info *info)
895 {
896         int ret;
897         u8 val;
898
899         ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
900         if (ret < 0)
901                 goto fg_prog_ocv_fail;
902         else
903                 val = (ret & ~CHRG_CCCV_CV_MASK);
904
905         switch (info->pdata->max_volt) {
906         case CV_4100:
907                 val |= (CHRG_CCCV_CV_4100MV << CHRG_CCCV_CV_BIT_POS);
908                 break;
909         case CV_4150:
910                 val |= (CHRG_CCCV_CV_4150MV << CHRG_CCCV_CV_BIT_POS);
911                 break;
912         case CV_4200:
913                 val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS);
914                 break;
915         case CV_4350:
916                 val |= (CHRG_CCCV_CV_4350MV << CHRG_CCCV_CV_BIT_POS);
917                 break;
918         default:
919                 val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS);
920                 break;
921         }
922
923         ret = fuel_gauge_reg_writeb(info, AXP20X_CHRG_CTRL1, val);
924 fg_prog_ocv_fail:
925         return ret;
926 }
927
928 static int fuel_gauge_program_design_cap(struct axp288_fg_info *info)
929 {
930         int ret;
931
932         ret = fuel_gauge_reg_writeb(info,
933                 AXP288_FG_DES_CAP1_REG, info->pdata->cap1);
934         if (ret < 0)
935                 goto fg_prog_descap_fail;
936
937         ret = fuel_gauge_reg_writeb(info,
938                 AXP288_FG_DES_CAP0_REG, info->pdata->cap0);
939
940 fg_prog_descap_fail:
941         return ret;
942 }
943
944 static int fuel_gauge_program_ocv_curve(struct axp288_fg_info *info)
945 {
946         int ret = 0, i;
947
948         for (i = 0; i < OCV_CURVE_SIZE; i++) {
949                 ret = fuel_gauge_reg_writeb(info,
950                         AXP288_FG_OCV_CURVE_REG + i, info->pdata->ocv_curve[i]);
951                 if (ret < 0)
952                         goto fg_prog_ocv_fail;
953         }
954
955 fg_prog_ocv_fail:
956         return ret;
957 }
958
959 static int fuel_gauge_program_rdc_vals(struct axp288_fg_info *info)
960 {
961         int ret;
962
963         ret = fuel_gauge_reg_writeb(info,
964                 AXP288_FG_RDC1_REG, info->pdata->rdc1);
965         if (ret < 0)
966                 goto fg_prog_ocv_fail;
967
968         ret = fuel_gauge_reg_writeb(info,
969                 AXP288_FG_RDC0_REG, info->pdata->rdc0);
970
971 fg_prog_ocv_fail:
972         return ret;
973 }
974
975 static void fuel_gauge_init_config_regs(struct axp288_fg_info *info)
976 {
977         int ret;
978
979         /*
980          * check if the config data is already
981          * programmed and if so just return.
982          */
983
984         ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
985         if (ret < 0) {
986                 dev_warn(&info->pdev->dev, "CAP1 reg read err!!\n");
987         } else if (!(ret & FG_DES_CAP1_VALID)) {
988                 dev_info(&info->pdev->dev, "FG data needs to be initialized\n");
989         } else {
990                 dev_info(&info->pdev->dev, "FG data is already initialized\n");
991                 return;
992         }
993
994         ret = fuel_gauge_program_vbatt_full(info);
995         if (ret < 0)
996                 dev_err(&info->pdev->dev, "set vbatt full fail:%d\n", ret);
997
998         ret = fuel_gauge_program_design_cap(info);
999         if (ret < 0)
1000                 dev_err(&info->pdev->dev, "set design cap fail:%d\n", ret);
1001
1002         ret = fuel_gauge_program_rdc_vals(info);
1003         if (ret < 0)
1004                 dev_err(&info->pdev->dev, "set rdc fail:%d\n", ret);
1005
1006         ret = fuel_gauge_program_ocv_curve(info);
1007         if (ret < 0)
1008                 dev_err(&info->pdev->dev, "set ocv curve fail:%d\n", ret);
1009
1010         ret = fuel_gauge_set_lowbatt_thresholds(info);
1011         if (ret < 0)
1012                 dev_err(&info->pdev->dev, "lowbatt thr set fail:%d\n", ret);
1013
1014         ret = fuel_gauge_reg_writeb(info, AXP20X_CC_CTRL, 0xef);
1015         if (ret < 0)
1016                 dev_err(&info->pdev->dev, "gauge cntl set fail:%d\n", ret);
1017 }
1018
1019 static void fuel_gauge_init_irq(struct axp288_fg_info *info)
1020 {
1021         int ret, i, pirq;
1022
1023         for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
1024                 pirq = platform_get_irq(info->pdev, i);
1025                 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
1026                 if (info->irq[i] < 0) {
1027                         dev_warn(&info->pdev->dev,
1028                                 "regmap_irq get virq failed for IRQ %d: %d\n",
1029                                 pirq, info->irq[i]);
1030                         info->irq[i] = -1;
1031                         goto intr_failed;
1032                 }
1033                 ret = request_threaded_irq(info->irq[i],
1034                                 NULL, fuel_gauge_thread_handler,
1035                                 IRQF_ONESHOT, DEV_NAME, info);
1036                 if (ret) {
1037                         dev_warn(&info->pdev->dev,
1038                                 "request irq failed for IRQ %d: %d\n",
1039                                 pirq, info->irq[i]);
1040                         info->irq[i] = -1;
1041                         goto intr_failed;
1042                 } else {
1043                         dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n",
1044                                 pirq, info->irq[i]);
1045                 }
1046         }
1047         return;
1048
1049 intr_failed:
1050         for (; i > 0; i--) {
1051                 free_irq(info->irq[i - 1], info);
1052                 info->irq[i - 1] = -1;
1053         }
1054 }
1055
1056 static void fuel_gauge_init_hw_regs(struct axp288_fg_info *info)
1057 {
1058         int ret;
1059         unsigned int val;
1060
1061         ret = fuel_gauge_set_high_btemp_alert(info);
1062         if (ret < 0)
1063                 dev_err(&info->pdev->dev, "high batt temp set fail:%d\n", ret);
1064
1065         ret = fuel_gauge_set_low_btemp_alert(info);
1066         if (ret < 0)
1067                 dev_err(&info->pdev->dev, "low batt temp set fail:%d\n", ret);
1068
1069         /* enable interrupts */
1070         val = fuel_gauge_reg_readb(info, AXP20X_IRQ3_EN);
1071         val |= TEMP_IRQ_CFG_MASK;
1072         fuel_gauge_reg_writeb(info, AXP20X_IRQ3_EN, val);
1073
1074         val = fuel_gauge_reg_readb(info, AXP20X_IRQ4_EN);
1075         val |= FG_IRQ_CFG_LOWBATT_MASK;
1076         val = fuel_gauge_reg_writeb(info, AXP20X_IRQ4_EN, val);
1077 }
1078
1079 static int axp288_fuel_gauge_probe(struct platform_device *pdev)
1080 {
1081         int ret = 0;
1082         struct axp288_fg_info *info;
1083         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
1084         struct power_supply_config psy_cfg = {};
1085
1086         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
1087         if (!info)
1088                 return -ENOMEM;
1089
1090         info->pdev = pdev;
1091         info->regmap = axp20x->regmap;
1092         info->regmap_irqc = axp20x->regmap_irqc;
1093         info->status = POWER_SUPPLY_STATUS_UNKNOWN;
1094         info->pdata = pdev->dev.platform_data;
1095         if (!info->pdata)
1096                 return -ENODEV;
1097
1098         platform_set_drvdata(pdev, info);
1099
1100         mutex_init(&info->lock);
1101         INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor);
1102
1103         psy_cfg.drv_data = info;
1104         info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg);
1105         if (IS_ERR(info->bat)) {
1106                 ret = PTR_ERR(info->bat);
1107                 dev_err(&pdev->dev, "failed to register battery: %d\n", ret);
1108                 return ret;
1109         }
1110
1111         fuel_gauge_create_debugfs(info);
1112         fuel_gauge_init_config_regs(info);
1113         fuel_gauge_init_irq(info);
1114         fuel_gauge_init_hw_regs(info);
1115         schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
1116
1117         return ret;
1118 }
1119
1120 static struct platform_device_id axp288_fg_id_table[] = {
1121         { .name = DEV_NAME },
1122         {},
1123 };
1124
1125 static int axp288_fuel_gauge_remove(struct platform_device *pdev)
1126 {
1127         struct axp288_fg_info *info = platform_get_drvdata(pdev);
1128         int i;
1129
1130         cancel_delayed_work_sync(&info->status_monitor);
1131         power_supply_unregister(info->bat);
1132         fuel_gauge_remove_debugfs(info);
1133
1134         for (i = 0; i < AXP288_FG_INTR_NUM; i++)
1135                 if (info->irq[i] >= 0)
1136                         free_irq(info->irq[i], info);
1137
1138         return 0;
1139 }
1140
1141 static struct platform_driver axp288_fuel_gauge_driver = {
1142         .probe = axp288_fuel_gauge_probe,
1143         .remove = axp288_fuel_gauge_remove,
1144         .id_table = axp288_fg_id_table,
1145         .driver = {
1146                 .name = DEV_NAME,
1147         },
1148 };
1149
1150 module_platform_driver(axp288_fuel_gauge_driver);
1151
1152 MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
1153 MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>");
1154 MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver");
1155 MODULE_LICENSE("GPL");