2 * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver
4 * Copyright (C) 2014 Intel Corporation
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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>
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)
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)
53 #define CV_4100 4100 /* 4100mV */
54 #define CV_4150 4150 /* 4150mV */
55 #define CV_4200 4200 /* 4200mV */
56 #define CV_4350 4350 /* 4350mV */
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
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)
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)
77 #define FG_15BIT_WORD_VALID (1 << 15)
78 #define FG_15BIT_VAL_MASK 0x7fff
80 #define FG_REP_CAP_VALID (1 << 7)
81 #define FG_REP_CAP_VAL_MASK 0x7F
83 #define FG_DES_CAP1_VALID (1 << 7)
84 #define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */
86 #define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */
88 #define FG_OCV_CAP_VALID (1 << 7)
89 #define FG_OCV_CAP_VAL_MASK 0x7F
90 #define FG_CC_CAP_VALID (1 << 7)
91 #define FG_CC_CAP_VAL_MASK 0x7F
93 #define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */
94 #define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */
95 #define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */
96 #define FG_LOW_CAP_WARN_THR 14 /* 14 perc */
97 #define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */
98 #define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */
100 #define STATUS_MON_DELAY_JIFFIES (HZ * 60) /*60 sec */
101 #define NR_RETRY_CNT 3
102 #define DEV_NAME "axp288_fuel_gauge"
104 /* 1.1mV per LSB expressed in uV */
105 #define VOLTAGE_FROM_ADC(a) ((a * 11) / 10)
106 /* properties converted to tenths of degrees, uV, uA, uW */
107 #define PROP_TEMP(a) ((a) * 10)
108 #define UNPROP_TEMP(a) ((a) / 10)
109 #define PROP_VOLT(a) ((a) * 1000)
110 #define PROP_CURR(a) ((a) * 1000)
112 #define AXP288_FG_INTR_NUM 6
122 struct axp288_fg_info {
123 struct platform_device *pdev;
124 struct axp20x_fg_pdata *pdata;
125 struct regmap *regmap;
126 struct regmap_irq_chip_data *regmap_irqc;
127 int irq[AXP288_FG_INTR_NUM];
128 struct power_supply *bat;
131 struct delayed_work status_monitor;
132 struct dentry *debug_file;
135 static 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_MIN_DESIGN,
141 POWER_SUPPLY_PROP_VOLTAGE_NOW,
142 POWER_SUPPLY_PROP_VOLTAGE_OCV,
143 POWER_SUPPLY_PROP_CURRENT_NOW,
144 POWER_SUPPLY_PROP_CAPACITY,
145 POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
146 POWER_SUPPLY_PROP_TEMP,
147 POWER_SUPPLY_PROP_TEMP_MAX,
148 POWER_SUPPLY_PROP_TEMP_MIN,
149 POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
150 POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
151 POWER_SUPPLY_PROP_TECHNOLOGY,
152 POWER_SUPPLY_PROP_CHARGE_FULL,
153 POWER_SUPPLY_PROP_CHARGE_NOW,
154 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
155 POWER_SUPPLY_PROP_MODEL_NAME,
158 static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
163 for (i = 0; i < NR_RETRY_CNT; i++) {
164 ret = regmap_read(info->regmap, reg, &val);
172 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n", reg, ret);
179 static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val)
183 ret = regmap_write(info->regmap, reg, (unsigned int)val);
186 dev_err(&info->pdev->dev, "Error writing reg 0x%02x err: %d\n", reg, ret);
191 static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg)
193 unsigned char buf[2];
196 ret = regmap_bulk_read(info->regmap, reg, buf, 2);
198 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
203 ret = get_unaligned_be16(buf);
204 if (!(ret & FG_15BIT_WORD_VALID)) {
205 dev_err(&info->pdev->dev, "Error reg 0x%02x contents not valid\n",
210 return ret & FG_15BIT_VAL_MASK;
213 static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg)
215 unsigned char buf[2];
218 ret = regmap_bulk_read(info->regmap, reg, buf, 2);
220 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
225 /* 12-bit data values have upper 8 bits in buf[0], lower 4 in buf[1] */
226 return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f);
229 static int pmic_read_adc_val(const char *name, int *raw_val,
230 struct axp288_fg_info *info)
233 struct iio_channel *indio_chan;
235 indio_chan = iio_channel_get(NULL, name);
236 if (IS_ERR_OR_NULL(indio_chan)) {
237 ret = PTR_ERR(indio_chan);
240 ret = iio_read_channel_raw(indio_chan, &val);
242 dev_err(&info->pdev->dev,
243 "IIO channel read error: %x, %x\n", ret, val);
247 dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val);
251 iio_channel_release(indio_chan);
256 #ifdef CONFIG_DEBUG_FS
257 static int fuel_gauge_debug_show(struct seq_file *s, void *data)
259 struct axp288_fg_info *info = s->private;
262 seq_printf(s, " PWR_STATUS[%02x] : %02x\n",
263 AXP20X_PWR_INPUT_STATUS,
264 fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS));
265 seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n",
267 fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE));
268 seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n",
270 fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1));
271 seq_printf(s, " VLTF[%02x] : %02x\n",
272 AXP20X_V_LTF_DISCHRG,
273 fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG));
274 seq_printf(s, " VHTF[%02x] : %02x\n",
275 AXP20X_V_HTF_DISCHRG,
276 fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG));
277 seq_printf(s, " CC_CTRL[%02x] : %02x\n",
279 fuel_gauge_reg_readb(info, AXP20X_CC_CTRL));
280 seq_printf(s, "BATTERY CAP[%02x] : %02x\n",
282 fuel_gauge_reg_readb(info, AXP20X_FG_RES));
283 seq_printf(s, " FG_RDC1[%02x] : %02x\n",
285 fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG));
286 seq_printf(s, " FG_RDC0[%02x] : %02x\n",
288 fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG));
289 seq_printf(s, " FG_OCV[%02x] : %04x\n",
291 fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG));
292 seq_printf(s, " FG_DES_CAP[%02x] : %04x\n",
293 AXP288_FG_DES_CAP1_REG,
294 fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG));
295 seq_printf(s, " FG_CC_MTR[%02x] : %04x\n",
296 AXP288_FG_CC_MTR1_REG,
297 fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG));
298 seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n",
299 AXP288_FG_OCV_CAP_REG,
300 fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG));
301 seq_printf(s, " FG_CC_CAP[%02x] : %02x\n",
302 AXP288_FG_CC_CAP_REG,
303 fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG));
304 seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n",
305 AXP288_FG_LOW_CAP_REG,
306 fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG));
307 seq_printf(s, "TUNING_CTL0[%02x] : %02x\n",
309 fuel_gauge_reg_readb(info, AXP288_FG_TUNE0));
310 seq_printf(s, "TUNING_CTL1[%02x] : %02x\n",
312 fuel_gauge_reg_readb(info, AXP288_FG_TUNE1));
313 seq_printf(s, "TUNING_CTL2[%02x] : %02x\n",
315 fuel_gauge_reg_readb(info, AXP288_FG_TUNE2));
316 seq_printf(s, "TUNING_CTL3[%02x] : %02x\n",
318 fuel_gauge_reg_readb(info, AXP288_FG_TUNE3));
319 seq_printf(s, "TUNING_CTL4[%02x] : %02x\n",
321 fuel_gauge_reg_readb(info, AXP288_FG_TUNE4));
322 seq_printf(s, "TUNING_CTL5[%02x] : %02x\n",
324 fuel_gauge_reg_readb(info, AXP288_FG_TUNE5));
326 ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
328 seq_printf(s, "axp288-batttemp : %d\n", raw_val);
329 ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info);
331 seq_printf(s, "axp288-pmictemp : %d\n", raw_val);
332 ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info);
334 seq_printf(s, "axp288-systtemp : %d\n", raw_val);
335 ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info);
337 seq_printf(s, "axp288-chrgcurr : %d\n", raw_val);
338 ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info);
340 seq_printf(s, "axp288-dchrgcur : %d\n", raw_val);
341 ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
343 seq_printf(s, "axp288-battvolt : %d\n", raw_val);
348 static int debug_open(struct inode *inode, struct file *file)
350 return single_open(file, fuel_gauge_debug_show, inode->i_private);
353 static const struct file_operations fg_debug_fops = {
357 .release = single_release,
360 static void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
362 info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL,
363 info, &fg_debug_fops);
366 static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
368 debugfs_remove(info->debug_file);
371 static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
374 static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
379 static void fuel_gauge_get_status(struct axp288_fg_info *info)
382 int charge, discharge;
384 pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
386 dev_err(&info->pdev->dev,
387 "PWR STAT read failed:%d\n", pwr_stat);
390 ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
392 dev_err(&info->pdev->dev,
393 "ADC charge current read failed:%d\n", ret);
396 ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
398 dev_err(&info->pdev->dev,
399 "ADC discharge current read failed:%d\n", ret);
404 info->status = POWER_SUPPLY_STATUS_CHARGING;
405 else if (discharge > 0)
406 info->status = POWER_SUPPLY_STATUS_DISCHARGING;
408 if (pwr_stat & CHRG_STAT_BAT_PRESENT)
409 info->status = POWER_SUPPLY_STATUS_FULL;
411 info->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
415 static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt)
417 int ret = 0, raw_val;
419 ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
421 goto vbatt_read_fail;
423 *vbatt = VOLTAGE_FROM_ADC(raw_val);
428 static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur)
431 int charge, discharge;
433 ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
435 goto current_read_fail;
436 ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
438 goto current_read_fail;
442 else if (discharge > 0)
443 value = -1 * discharge;
450 static int temp_to_adc(struct axp288_fg_info *info, int tval)
452 int rntc = 0, i, ret, adc_val;
453 int rmin, rmax, tmin, tmax;
454 int tcsz = info->pdata->tcsz;
456 /* get the Rntc resitance value for this temp */
457 if (tval > info->pdata->thermistor_curve[0][1]) {
458 rntc = info->pdata->thermistor_curve[0][0];
459 } else if (tval <= info->pdata->thermistor_curve[tcsz-1][1]) {
460 rntc = info->pdata->thermistor_curve[tcsz-1][0];
462 for (i = 1; i < tcsz; i++) {
463 if (tval > info->pdata->thermistor_curve[i][1]) {
464 rmin = info->pdata->thermistor_curve[i-1][0];
465 rmax = info->pdata->thermistor_curve[i][0];
466 tmin = info->pdata->thermistor_curve[i-1][1];
467 tmax = info->pdata->thermistor_curve[i][1];
468 rntc = rmin + ((rmax - rmin) *
469 (tval - tmin) / (tmax - tmin));
475 /* we need the current to calculate the proper adc voltage */
476 ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE);
478 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
483 * temperature is proportional to NTS thermistor resistance
484 * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA
485 * [12-bit ADC VAL] = R_NTC(Ω) * current / 800
487 adc_val = rntc * (20 + (20 * ((ret >> 4) & 0x3))) / 800;
492 static int adc_to_temp(struct axp288_fg_info *info, int adc_val)
494 int ret, r, i, tval = 0;
495 int rmin, rmax, tmin, tmax;
496 int tcsz = info->pdata->tcsz;
498 ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE);
500 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
505 * temperature is proportional to NTS thermistor resistance
506 * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA
507 * R_NTC(Ω) = [12-bit ADC VAL] * 800 / current
509 r = adc_val * 800 / (20 + (20 * ((ret >> 4) & 0x3)));
511 if (r < info->pdata->thermistor_curve[0][0]) {
512 tval = info->pdata->thermistor_curve[0][1];
513 } else if (r >= info->pdata->thermistor_curve[tcsz-1][0]) {
514 tval = info->pdata->thermistor_curve[tcsz-1][1];
516 for (i = 1; i < tcsz; i++) {
517 if (r < info->pdata->thermistor_curve[i][0]) {
518 rmin = info->pdata->thermistor_curve[i-1][0];
519 rmax = info->pdata->thermistor_curve[i][0];
520 tmin = info->pdata->thermistor_curve[i-1][1];
521 tmax = info->pdata->thermistor_curve[i][1];
522 tval = tmin + ((tmax - tmin) *
523 (r - rmin) / (rmax - rmin));
532 static int fuel_gauge_get_btemp(struct axp288_fg_info *info, int *btemp)
534 int ret, raw_val = 0;
536 ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
540 *btemp = adc_to_temp(info, raw_val);
546 static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv)
550 ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG);
552 *vocv = VOLTAGE_FROM_ADC(ret);
557 static int fuel_gauge_battery_health(struct axp288_fg_info *info)
560 int ret, health = POWER_SUPPLY_HEALTH_UNKNOWN;
562 ret = fuel_gauge_get_btemp(info, &temp);
564 goto health_read_fail;
566 ret = fuel_gauge_get_vocv(info, &vocv);
568 goto health_read_fail;
570 if (vocv > info->pdata->max_volt)
571 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
572 else if (temp > info->pdata->max_temp)
573 health = POWER_SUPPLY_HEALTH_OVERHEAT;
574 else if (temp < info->pdata->min_temp)
575 health = POWER_SUPPLY_HEALTH_COLD;
576 else if (vocv < info->pdata->min_volt)
577 health = POWER_SUPPLY_HEALTH_DEAD;
579 health = POWER_SUPPLY_HEALTH_GOOD;
585 static int fuel_gauge_set_high_btemp_alert(struct axp288_fg_info *info)
589 /* program temperature threshold as 1/16 ADC value */
590 adc_val = temp_to_adc(info, info->pdata->max_temp);
591 ret = fuel_gauge_reg_writeb(info, AXP20X_V_HTF_DISCHRG, adc_val >> 4);
596 static int fuel_gauge_set_low_btemp_alert(struct axp288_fg_info *info)
600 /* program temperature threshold as 1/16 ADC value */
601 adc_val = temp_to_adc(info, info->pdata->min_temp);
602 ret = fuel_gauge_reg_writeb(info, AXP20X_V_LTF_DISCHRG, adc_val >> 4);
607 static int fuel_gauge_get_property(struct power_supply *ps,
608 enum power_supply_property prop,
609 union power_supply_propval *val)
611 struct axp288_fg_info *info = power_supply_get_drvdata(ps);
614 mutex_lock(&info->lock);
616 case POWER_SUPPLY_PROP_STATUS:
617 fuel_gauge_get_status(info);
618 val->intval = info->status;
620 case POWER_SUPPLY_PROP_HEALTH:
621 val->intval = fuel_gauge_battery_health(info);
623 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
624 ret = fuel_gauge_get_vbatt(info, &value);
626 goto fuel_gauge_read_err;
627 val->intval = PROP_VOLT(value);
629 case POWER_SUPPLY_PROP_VOLTAGE_OCV:
630 ret = fuel_gauge_get_vocv(info, &value);
632 goto fuel_gauge_read_err;
633 val->intval = PROP_VOLT(value);
635 case POWER_SUPPLY_PROP_CURRENT_NOW:
636 ret = fuel_gauge_get_current(info, &value);
638 goto fuel_gauge_read_err;
639 val->intval = PROP_CURR(value);
641 case POWER_SUPPLY_PROP_PRESENT:
642 ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE);
644 goto fuel_gauge_read_err;
646 if (ret & CHRG_STAT_BAT_PRESENT)
651 case POWER_SUPPLY_PROP_CAPACITY:
652 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
654 goto fuel_gauge_read_err;
656 if (!(ret & FG_REP_CAP_VALID))
657 dev_err(&info->pdev->dev,
658 "capacity measurement not valid\n");
659 val->intval = (ret & FG_REP_CAP_VAL_MASK);
661 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
662 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
664 goto fuel_gauge_read_err;
665 val->intval = (ret & 0x0f);
667 case POWER_SUPPLY_PROP_TEMP:
668 ret = fuel_gauge_get_btemp(info, &value);
670 goto fuel_gauge_read_err;
671 val->intval = PROP_TEMP(value);
673 case POWER_SUPPLY_PROP_TEMP_MAX:
674 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
675 val->intval = PROP_TEMP(info->pdata->max_temp);
677 case POWER_SUPPLY_PROP_TEMP_MIN:
678 case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
679 val->intval = PROP_TEMP(info->pdata->min_temp);
681 case POWER_SUPPLY_PROP_TECHNOLOGY:
682 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
684 case POWER_SUPPLY_PROP_CHARGE_NOW:
685 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG);
687 goto fuel_gauge_read_err;
689 val->intval = ret * FG_DES_CAP_RES_LSB;
691 case POWER_SUPPLY_PROP_CHARGE_FULL:
692 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG);
694 goto fuel_gauge_read_err;
696 val->intval = ret * FG_DES_CAP_RES_LSB;
698 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
699 val->intval = PROP_CURR(info->pdata->design_cap);
701 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
702 val->intval = PROP_VOLT(info->pdata->max_volt);
704 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
705 val->intval = PROP_VOLT(info->pdata->min_volt);
707 case POWER_SUPPLY_PROP_MODEL_NAME:
708 val->strval = info->pdata->battid;
711 mutex_unlock(&info->lock);
715 mutex_unlock(&info->lock);
719 mutex_unlock(&info->lock);
723 static int fuel_gauge_set_property(struct power_supply *ps,
724 enum power_supply_property prop,
725 const union power_supply_propval *val)
727 struct axp288_fg_info *info = power_supply_get_drvdata(ps);
730 mutex_lock(&info->lock);
732 case POWER_SUPPLY_PROP_STATUS:
733 info->status = val->intval;
735 case POWER_SUPPLY_PROP_TEMP_MIN:
736 case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
737 if ((val->intval < PD_DEF_MIN_TEMP) ||
738 (val->intval > PD_DEF_MAX_TEMP)) {
742 info->pdata->min_temp = UNPROP_TEMP(val->intval);
743 ret = fuel_gauge_set_low_btemp_alert(info);
745 dev_err(&info->pdev->dev,
746 "temp alert min set fail:%d\n", ret);
748 case POWER_SUPPLY_PROP_TEMP_MAX:
749 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
750 if ((val->intval < PD_DEF_MIN_TEMP) ||
751 (val->intval > PD_DEF_MAX_TEMP)) {
755 info->pdata->max_temp = UNPROP_TEMP(val->intval);
756 ret = fuel_gauge_set_high_btemp_alert(info);
758 dev_err(&info->pdev->dev,
759 "temp alert max set fail:%d\n", ret);
761 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
762 if ((val->intval < 0) || (val->intval > 15)) {
766 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
770 ret |= (val->intval & 0xf);
771 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret);
778 mutex_unlock(&info->lock);
782 static int fuel_gauge_property_is_writeable(struct power_supply *psy,
783 enum power_supply_property psp)
788 case POWER_SUPPLY_PROP_STATUS:
789 case POWER_SUPPLY_PROP_TEMP_MIN:
790 case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
791 case POWER_SUPPLY_PROP_TEMP_MAX:
792 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
793 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
803 static void fuel_gauge_status_monitor(struct work_struct *work)
805 struct axp288_fg_info *info = container_of(work,
806 struct axp288_fg_info, status_monitor.work);
808 fuel_gauge_get_status(info);
809 power_supply_changed(info->bat);
810 schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
813 static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev)
815 struct axp288_fg_info *info = dev;
818 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
819 if (info->irq[i] == irq)
823 if (i >= AXP288_FG_INTR_NUM) {
824 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
830 dev_info(&info->pdev->dev,
831 "Quit Battery under temperature in work mode IRQ (QWBTU)\n");
834 dev_info(&info->pdev->dev,
835 "Battery under temperature in work mode IRQ (WBTU)\n");
838 dev_info(&info->pdev->dev,
839 "Quit Battery over temperature in work mode IRQ (QWBTO)\n");
842 dev_info(&info->pdev->dev,
843 "Battery over temperature in work mode IRQ (WBTO)\n");
846 dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n");
849 dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n");
852 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
855 power_supply_changed(info->bat);
859 static void fuel_gauge_external_power_changed(struct power_supply *psy)
861 struct axp288_fg_info *info = power_supply_get_drvdata(psy);
863 power_supply_changed(info->bat);
866 static const struct power_supply_desc fuel_gauge_desc = {
868 .type = POWER_SUPPLY_TYPE_BATTERY,
869 .properties = fuel_gauge_props,
870 .num_properties = ARRAY_SIZE(fuel_gauge_props),
871 .get_property = fuel_gauge_get_property,
872 .set_property = fuel_gauge_set_property,
873 .property_is_writeable = fuel_gauge_property_is_writeable,
874 .external_power_changed = fuel_gauge_external_power_changed,
877 static int fuel_gauge_set_lowbatt_thresholds(struct axp288_fg_info *info)
882 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
884 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
887 ret = (ret & FG_REP_CAP_VAL_MASK);
889 if (ret > FG_LOW_CAP_WARN_THR)
890 reg_val = FG_LOW_CAP_WARN_THR;
891 else if (ret > FG_LOW_CAP_CRIT_THR)
892 reg_val = FG_LOW_CAP_CRIT_THR;
894 reg_val = FG_LOW_CAP_SHDN_THR;
896 reg_val |= FG_LOW_CAP_THR1_VAL;
897 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, reg_val);
899 dev_err(&info->pdev->dev, "%s:write err:%d\n", __func__, ret);
904 static int fuel_gauge_program_vbatt_full(struct axp288_fg_info *info)
909 ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
911 goto fg_prog_ocv_fail;
913 val = (ret & ~CHRG_CCCV_CV_MASK);
915 switch (info->pdata->max_volt) {
917 val |= (CHRG_CCCV_CV_4100MV << CHRG_CCCV_CV_BIT_POS);
920 val |= (CHRG_CCCV_CV_4150MV << CHRG_CCCV_CV_BIT_POS);
923 val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS);
926 val |= (CHRG_CCCV_CV_4350MV << CHRG_CCCV_CV_BIT_POS);
929 val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS);
933 ret = fuel_gauge_reg_writeb(info, AXP20X_CHRG_CTRL1, val);
938 static int fuel_gauge_program_design_cap(struct axp288_fg_info *info)
942 ret = fuel_gauge_reg_writeb(info,
943 AXP288_FG_DES_CAP1_REG, info->pdata->cap1);
945 goto fg_prog_descap_fail;
947 ret = fuel_gauge_reg_writeb(info,
948 AXP288_FG_DES_CAP0_REG, info->pdata->cap0);
954 static int fuel_gauge_program_ocv_curve(struct axp288_fg_info *info)
958 for (i = 0; i < OCV_CURVE_SIZE; i++) {
959 ret = fuel_gauge_reg_writeb(info,
960 AXP288_FG_OCV_CURVE_REG + i, info->pdata->ocv_curve[i]);
962 goto fg_prog_ocv_fail;
969 static int fuel_gauge_program_rdc_vals(struct axp288_fg_info *info)
973 ret = fuel_gauge_reg_writeb(info,
974 AXP288_FG_RDC1_REG, info->pdata->rdc1);
976 goto fg_prog_ocv_fail;
978 ret = fuel_gauge_reg_writeb(info,
979 AXP288_FG_RDC0_REG, info->pdata->rdc0);
985 static void fuel_gauge_init_config_regs(struct axp288_fg_info *info)
990 * check if the config data is already
991 * programmed and if so just return.
994 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
996 dev_warn(&info->pdev->dev, "CAP1 reg read err!!\n");
997 } else if (!(ret & FG_DES_CAP1_VALID)) {
998 dev_info(&info->pdev->dev, "FG data needs to be initialized\n");
1000 dev_info(&info->pdev->dev, "FG data is already initialized\n");
1004 ret = fuel_gauge_program_vbatt_full(info);
1006 dev_err(&info->pdev->dev, "set vbatt full fail:%d\n", ret);
1008 ret = fuel_gauge_program_design_cap(info);
1010 dev_err(&info->pdev->dev, "set design cap fail:%d\n", ret);
1012 ret = fuel_gauge_program_rdc_vals(info);
1014 dev_err(&info->pdev->dev, "set rdc fail:%d\n", ret);
1016 ret = fuel_gauge_program_ocv_curve(info);
1018 dev_err(&info->pdev->dev, "set ocv curve fail:%d\n", ret);
1020 ret = fuel_gauge_set_lowbatt_thresholds(info);
1022 dev_err(&info->pdev->dev, "lowbatt thr set fail:%d\n", ret);
1024 ret = fuel_gauge_reg_writeb(info, AXP20X_CC_CTRL, 0xef);
1026 dev_err(&info->pdev->dev, "gauge cntl set fail:%d\n", ret);
1029 static void fuel_gauge_init_irq(struct axp288_fg_info *info)
1033 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
1034 pirq = platform_get_irq(info->pdev, i);
1035 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
1036 if (info->irq[i] < 0) {
1037 dev_warn(&info->pdev->dev,
1038 "regmap_irq get virq failed for IRQ %d: %d\n",
1039 pirq, info->irq[i]);
1043 ret = request_threaded_irq(info->irq[i],
1044 NULL, fuel_gauge_thread_handler,
1045 IRQF_ONESHOT, DEV_NAME, info);
1047 dev_warn(&info->pdev->dev,
1048 "request irq failed for IRQ %d: %d\n",
1049 pirq, info->irq[i]);
1053 dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n",
1054 pirq, info->irq[i]);
1060 for (; i > 0; i--) {
1061 free_irq(info->irq[i - 1], info);
1062 info->irq[i - 1] = -1;
1066 static void fuel_gauge_init_hw_regs(struct axp288_fg_info *info)
1071 ret = fuel_gauge_set_high_btemp_alert(info);
1073 dev_err(&info->pdev->dev, "high batt temp set fail:%d\n", ret);
1075 ret = fuel_gauge_set_low_btemp_alert(info);
1077 dev_err(&info->pdev->dev, "low batt temp set fail:%d\n", ret);
1079 /* enable interrupts */
1080 val = fuel_gauge_reg_readb(info, AXP20X_IRQ3_EN);
1081 val |= TEMP_IRQ_CFG_MASK;
1082 fuel_gauge_reg_writeb(info, AXP20X_IRQ3_EN, val);
1084 val = fuel_gauge_reg_readb(info, AXP20X_IRQ4_EN);
1085 val |= FG_IRQ_CFG_LOWBATT_MASK;
1086 val = fuel_gauge_reg_writeb(info, AXP20X_IRQ4_EN, val);
1089 static int axp288_fuel_gauge_probe(struct platform_device *pdev)
1092 struct axp288_fg_info *info;
1093 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
1094 struct power_supply_config psy_cfg = {};
1096 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
1101 info->regmap = axp20x->regmap;
1102 info->regmap_irqc = axp20x->regmap_irqc;
1103 info->status = POWER_SUPPLY_STATUS_UNKNOWN;
1104 info->pdata = pdev->dev.platform_data;
1108 platform_set_drvdata(pdev, info);
1110 mutex_init(&info->lock);
1111 INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor);
1113 psy_cfg.drv_data = info;
1114 info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg);
1115 if (IS_ERR(info->bat)) {
1116 ret = PTR_ERR(info->bat);
1117 dev_err(&pdev->dev, "failed to register battery: %d\n", ret);
1121 fuel_gauge_create_debugfs(info);
1122 fuel_gauge_init_config_regs(info);
1123 fuel_gauge_init_irq(info);
1124 fuel_gauge_init_hw_regs(info);
1125 schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
1130 static const struct platform_device_id axp288_fg_id_table[] = {
1131 { .name = DEV_NAME },
1135 static int axp288_fuel_gauge_remove(struct platform_device *pdev)
1137 struct axp288_fg_info *info = platform_get_drvdata(pdev);
1140 cancel_delayed_work_sync(&info->status_monitor);
1141 power_supply_unregister(info->bat);
1142 fuel_gauge_remove_debugfs(info);
1144 for (i = 0; i < AXP288_FG_INTR_NUM; i++)
1145 if (info->irq[i] >= 0)
1146 free_irq(info->irq[i], info);
1151 static struct platform_driver axp288_fuel_gauge_driver = {
1152 .probe = axp288_fuel_gauge_probe,
1153 .remove = axp288_fuel_gauge_remove,
1154 .id_table = axp288_fg_id_table,
1160 module_platform_driver(axp288_fuel_gauge_driver);
1162 MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
1163 MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>");
1164 MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver");
1165 MODULE_LICENSE("GPL");