2 * Fuel gauge driver for Maxim 17042 / 8966 / 8997
3 * Note that Maxim 8966 and 8997 are mfd and this is its subdevice.
5 * Copyright (C) 2011 Samsung Electronics
6 * MyungJoo Ham <myungjoo.ham@samsung.com>
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; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * This driver is based on max17040_battery.c
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/i2c.h>
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
32 #include <linux/mod_devicetable.h>
33 #include <linux/power_supply.h>
34 #include <linux/power/max17042_battery.h>
37 /* Status register bits */
38 #define STATUS_POR_BIT (1 << 1)
39 #define STATUS_BST_BIT (1 << 3)
40 #define STATUS_VMN_BIT (1 << 8)
41 #define STATUS_TMN_BIT (1 << 9)
42 #define STATUS_SMN_BIT (1 << 10)
43 #define STATUS_BI_BIT (1 << 11)
44 #define STATUS_VMX_BIT (1 << 12)
45 #define STATUS_TMX_BIT (1 << 13)
46 #define STATUS_SMX_BIT (1 << 14)
47 #define STATUS_BR_BIT (1 << 15)
49 /* Interrupt mask bits */
50 #define CONFIG_ALRT_BIT_ENBL (1 << 2)
51 #define STATUS_INTR_SOCMIN_BIT (1 << 10)
52 #define STATUS_INTR_SOCMAX_BIT (1 << 14)
54 #define VFSOC0_LOCK 0x0000
55 #define VFSOC0_UNLOCK 0x0080
56 #define MODEL_UNLOCK1 0X0059
57 #define MODEL_UNLOCK2 0X00C4
58 #define MODEL_LOCK1 0X0000
59 #define MODEL_LOCK2 0X0000
61 #define dQ_ACC_DIV 0x4
62 #define dP_ACC_100 0x1900
63 #define dP_ACC_200 0x3200
65 #define MAX17042_IC_VERSION 0x0092
66 #define MAX17047_IC_VERSION 0x00AC /* same for max17050 */
68 struct max17042_chip {
69 struct i2c_client *client;
70 struct power_supply battery;
71 enum max170xx_chip_type chip_type;
72 struct max17042_platform_data *pdata;
73 struct work_struct work;
77 static int max17042_write_reg(struct i2c_client *client, u8 reg, u16 value)
79 int ret = i2c_smbus_write_word_data(client, reg, value);
82 dev_err(&client->dev, "%s: err %d\n", __func__, ret);
87 static int max17042_read_reg(struct i2c_client *client, u8 reg)
89 int ret = i2c_smbus_read_word_data(client, reg);
92 dev_err(&client->dev, "%s: err %d\n", __func__, ret);
97 static void max17042_set_reg(struct i2c_client *client,
98 struct max17042_reg_data *data, int size)
102 for (i = 0; i < size; i++)
103 max17042_write_reg(client, data[i].addr, data[i].data);
106 static enum power_supply_property max17042_battery_props[] = {
107 POWER_SUPPLY_PROP_PRESENT,
108 POWER_SUPPLY_PROP_CYCLE_COUNT,
109 POWER_SUPPLY_PROP_VOLTAGE_MAX,
110 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
111 POWER_SUPPLY_PROP_VOLTAGE_NOW,
112 POWER_SUPPLY_PROP_VOLTAGE_AVG,
113 POWER_SUPPLY_PROP_VOLTAGE_OCV,
114 POWER_SUPPLY_PROP_CAPACITY,
115 POWER_SUPPLY_PROP_CHARGE_FULL,
116 POWER_SUPPLY_PROP_CHARGE_COUNTER,
117 POWER_SUPPLY_PROP_TEMP,
118 POWER_SUPPLY_PROP_CURRENT_NOW,
119 POWER_SUPPLY_PROP_CURRENT_AVG,
122 static int max17042_get_property(struct power_supply *psy,
123 enum power_supply_property psp,
124 union power_supply_propval *val)
126 struct max17042_chip *chip = container_of(psy,
127 struct max17042_chip, battery);
130 if (!chip->init_complete)
134 case POWER_SUPPLY_PROP_PRESENT:
135 ret = max17042_read_reg(chip->client, MAX17042_STATUS);
139 if (ret & MAX17042_STATUS_BattAbsent)
144 case POWER_SUPPLY_PROP_CYCLE_COUNT:
145 ret = max17042_read_reg(chip->client, MAX17042_Cycles);
151 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
152 ret = max17042_read_reg(chip->client, MAX17042_MinMaxVolt);
156 val->intval = ret >> 8;
157 val->intval *= 20000; /* Units of LSB = 20mV */
159 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
160 if (chip->chip_type == MAX17042)
161 ret = max17042_read_reg(chip->client, MAX17042_V_empty);
163 ret = max17042_read_reg(chip->client, MAX17047_V_empty);
167 val->intval = ret >> 7;
168 val->intval *= 10000; /* Units of LSB = 10mV */
170 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
171 ret = max17042_read_reg(chip->client, MAX17042_VCELL);
175 val->intval = ret * 625 / 8;
177 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
178 ret = max17042_read_reg(chip->client, MAX17042_AvgVCELL);
182 val->intval = ret * 625 / 8;
184 case POWER_SUPPLY_PROP_VOLTAGE_OCV:
185 ret = max17042_read_reg(chip->client, MAX17042_OCVInternal);
189 val->intval = ret * 625 / 8;
191 case POWER_SUPPLY_PROP_CAPACITY:
192 ret = max17042_read_reg(chip->client, MAX17042_RepSOC);
196 val->intval = ret >> 8;
198 case POWER_SUPPLY_PROP_CHARGE_FULL:
199 ret = max17042_read_reg(chip->client, MAX17042_FullCAP);
203 val->intval = ret * 1000 / 2;
205 case POWER_SUPPLY_PROP_CHARGE_COUNTER:
206 ret = max17042_read_reg(chip->client, MAX17042_QH);
210 val->intval = ret * 1000 / 2;
212 case POWER_SUPPLY_PROP_TEMP:
213 ret = max17042_read_reg(chip->client, MAX17042_TEMP);
218 /* The value is signed. */
219 if (val->intval & 0x8000) {
220 val->intval = (0x7fff & ~val->intval) + 1;
223 /* The value is converted into deci-centigrade scale */
224 /* Units of LSB = 1 / 256 degree Celsius */
225 val->intval = val->intval * 10 / 256;
227 case POWER_SUPPLY_PROP_CURRENT_NOW:
228 if (chip->pdata->enable_current_sense) {
229 ret = max17042_read_reg(chip->client, MAX17042_Current);
234 if (val->intval & 0x8000) {
236 val->intval = ~val->intval & 0x7fff;
240 val->intval *= 1562500 / chip->pdata->r_sns;
245 case POWER_SUPPLY_PROP_CURRENT_AVG:
246 if (chip->pdata->enable_current_sense) {
247 ret = max17042_read_reg(chip->client,
248 MAX17042_AvgCurrent);
253 if (val->intval & 0x8000) {
255 val->intval = ~val->intval & 0x7fff;
259 val->intval *= 1562500 / chip->pdata->r_sns;
270 static int max17042_write_verify_reg(struct i2c_client *client,
278 ret = i2c_smbus_write_word_data(client, reg, value);
279 read_value = max17042_read_reg(client, reg);
280 if (read_value != value) {
284 } while (retries && read_value != value);
287 dev_err(&client->dev, "%s: err %d\n", __func__, ret);
292 static inline void max17042_override_por(
293 struct i2c_client *client, u8 reg, u16 value)
296 max17042_write_reg(client, reg, value);
299 static inline void max10742_unlock_model(struct max17042_chip *chip)
301 struct i2c_client *client = chip->client;
302 max17042_write_reg(client, MAX17042_MLOCKReg1, MODEL_UNLOCK1);
303 max17042_write_reg(client, MAX17042_MLOCKReg2, MODEL_UNLOCK2);
306 static inline void max10742_lock_model(struct max17042_chip *chip)
308 struct i2c_client *client = chip->client;
309 max17042_write_reg(client, MAX17042_MLOCKReg1, MODEL_LOCK1);
310 max17042_write_reg(client, MAX17042_MLOCKReg2, MODEL_LOCK2);
313 static inline void max17042_write_model_data(struct max17042_chip *chip,
316 struct i2c_client *client = chip->client;
318 for (i = 0; i < size; i++)
319 max17042_write_reg(client, addr + i,
320 chip->pdata->config_data->cell_char_tbl[i]);
323 static inline void max17042_read_model_data(struct max17042_chip *chip,
324 u8 addr, u16 *data, int size)
326 struct i2c_client *client = chip->client;
329 for (i = 0; i < size; i++)
330 data[i] = max17042_read_reg(client, addr + i);
333 static inline int max17042_model_data_compare(struct max17042_chip *chip,
334 u16 *data1, u16 *data2, int size)
338 if (memcmp(data1, data2, size)) {
339 dev_err(&chip->client->dev, "%s compare failed\n", __func__);
340 for (i = 0; i < size; i++)
341 dev_info(&chip->client->dev, "0x%x, 0x%x",
343 dev_info(&chip->client->dev, "\n");
349 static int max17042_init_model(struct max17042_chip *chip)
352 int table_size = ARRAY_SIZE(chip->pdata->config_data->cell_char_tbl);
355 temp_data = kcalloc(table_size, sizeof(*temp_data), GFP_KERNEL);
359 max10742_unlock_model(chip);
360 max17042_write_model_data(chip, MAX17042_MODELChrTbl,
362 max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data,
365 ret = max17042_model_data_compare(
367 chip->pdata->config_data->cell_char_tbl,
371 max10742_lock_model(chip);
377 static int max17042_verify_model_lock(struct max17042_chip *chip)
380 int table_size = ARRAY_SIZE(chip->pdata->config_data->cell_char_tbl);
384 temp_data = kcalloc(table_size, sizeof(*temp_data), GFP_KERNEL);
388 max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data,
390 for (i = 0; i < table_size; i++)
398 static void max17042_write_config_regs(struct max17042_chip *chip)
400 struct max17042_config_data *config = chip->pdata->config_data;
402 max17042_write_reg(chip->client, MAX17042_CONFIG, config->config);
403 max17042_write_reg(chip->client, MAX17042_LearnCFG, config->learn_cfg);
404 max17042_write_reg(chip->client, MAX17042_FilterCFG,
406 max17042_write_reg(chip->client, MAX17042_RelaxCFG, config->relax_cfg);
407 if (chip->chip_type == MAX17047)
408 max17042_write_reg(chip->client, MAX17047_FullSOCThr,
409 config->full_soc_thresh);
412 static void max17042_write_custom_regs(struct max17042_chip *chip)
414 struct max17042_config_data *config = chip->pdata->config_data;
416 max17042_write_verify_reg(chip->client, MAX17042_RCOMP0,
418 max17042_write_verify_reg(chip->client, MAX17042_TempCo,
420 max17042_write_verify_reg(chip->client, MAX17042_ICHGTerm,
422 if (chip->chip_type == MAX17042) {
423 max17042_write_reg(chip->client, MAX17042_EmptyTempCo,
424 config->empty_tempco);
425 max17042_write_verify_reg(chip->client, MAX17042_K_empty0,
428 max17042_write_verify_reg(chip->client, MAX17047_QRTbl00,
430 max17042_write_verify_reg(chip->client, MAX17047_QRTbl10,
432 max17042_write_verify_reg(chip->client, MAX17047_QRTbl20,
434 max17042_write_verify_reg(chip->client, MAX17047_QRTbl30,
439 static void max17042_update_capacity_regs(struct max17042_chip *chip)
441 struct max17042_config_data *config = chip->pdata->config_data;
443 max17042_write_verify_reg(chip->client, MAX17042_FullCAP,
445 max17042_write_reg(chip->client, MAX17042_DesignCap,
447 max17042_write_verify_reg(chip->client, MAX17042_FullCAPNom,
451 static void max17042_reset_vfsoc0_reg(struct max17042_chip *chip)
455 vfSoc = max17042_read_reg(chip->client, MAX17042_VFSOC);
456 max17042_write_reg(chip->client, MAX17042_VFSOC0Enable, VFSOC0_UNLOCK);
457 max17042_write_verify_reg(chip->client, MAX17042_VFSOC0, vfSoc);
458 max17042_write_reg(chip->client, MAX17042_VFSOC0Enable, VFSOC0_LOCK);
461 static void max17042_load_new_capacity_params(struct max17042_chip *chip)
463 u16 full_cap0, rep_cap, dq_acc, vfSoc;
466 struct max17042_config_data *config = chip->pdata->config_data;
468 full_cap0 = max17042_read_reg(chip->client, MAX17042_FullCAP0);
469 vfSoc = max17042_read_reg(chip->client, MAX17042_VFSOC);
471 /* fg_vfSoc needs to shifted by 8 bits to get the
472 * perc in 1% accuracy, to get the right rem_cap multiply
473 * full_cap0, fg_vfSoc and devide by 100
475 rem_cap = ((vfSoc >> 8) * full_cap0) / 100;
476 max17042_write_verify_reg(chip->client, MAX17042_RemCap, (u16)rem_cap);
478 rep_cap = (u16)rem_cap;
479 max17042_write_verify_reg(chip->client, MAX17042_RepCap, rep_cap);
481 /* Write dQ_acc to 200% of Capacity and dP_acc to 200% */
482 dq_acc = config->fullcap / dQ_ACC_DIV;
483 max17042_write_verify_reg(chip->client, MAX17042_dQacc, dq_acc);
484 max17042_write_verify_reg(chip->client, MAX17042_dPacc, dP_ACC_200);
486 max17042_write_verify_reg(chip->client, MAX17042_FullCAP,
488 max17042_write_reg(chip->client, MAX17042_DesignCap,
490 max17042_write_verify_reg(chip->client, MAX17042_FullCAPNom,
492 /* Update SOC register with new SOC */
493 max17042_write_reg(chip->client, MAX17042_RepSOC, vfSoc);
497 * Block write all the override values coming from platform data.
498 * This function MUST be called before the POR initialization proceedure
499 * specified by maxim.
501 static inline void max17042_override_por_values(struct max17042_chip *chip)
503 struct i2c_client *client = chip->client;
504 struct max17042_config_data *config = chip->pdata->config_data;
506 max17042_override_por(client, MAX17042_TGAIN, config->tgain);
507 max17042_override_por(client, MAx17042_TOFF, config->toff);
508 max17042_override_por(client, MAX17042_CGAIN, config->cgain);
509 max17042_override_por(client, MAX17042_COFF, config->coff);
511 max17042_override_por(client, MAX17042_VALRT_Th, config->valrt_thresh);
512 max17042_override_por(client, MAX17042_TALRT_Th, config->talrt_thresh);
513 max17042_override_por(client, MAX17042_SALRT_Th,
514 config->soc_alrt_thresh);
515 max17042_override_por(client, MAX17042_CONFIG, config->config);
516 max17042_override_por(client, MAX17042_SHDNTIMER, config->shdntimer);
518 max17042_override_por(client, MAX17042_DesignCap, config->design_cap);
519 max17042_override_por(client, MAX17042_ICHGTerm, config->ichgt_term);
521 max17042_override_por(client, MAX17042_AtRate, config->at_rate);
522 max17042_override_por(client, MAX17042_LearnCFG, config->learn_cfg);
523 max17042_override_por(client, MAX17042_FilterCFG, config->filter_cfg);
524 max17042_override_por(client, MAX17042_RelaxCFG, config->relax_cfg);
525 max17042_override_por(client, MAX17042_MiscCFG, config->misc_cfg);
526 max17042_override_por(client, MAX17042_MaskSOC, config->masksoc);
528 max17042_override_por(client, MAX17042_FullCAP, config->fullcap);
529 max17042_override_por(client, MAX17042_FullCAPNom, config->fullcapnom);
530 if (chip->chip_type == MAX17042)
531 max17042_override_por(client, MAX17042_SOC_empty,
533 max17042_override_por(client, MAX17042_LAvg_empty, config->lavg_empty);
534 max17042_override_por(client, MAX17042_dQacc, config->dqacc);
535 max17042_override_por(client, MAX17042_dPacc, config->dpacc);
537 if (chip->chip_type == MAX17042)
538 max17042_override_por(client, MAX17042_V_empty, config->vempty);
540 max17042_override_por(client, MAX17047_V_empty, config->vempty);
541 max17042_override_por(client, MAX17042_TempNom, config->temp_nom);
542 max17042_override_por(client, MAX17042_TempLim, config->temp_lim);
543 max17042_override_por(client, MAX17042_FCTC, config->fctc);
544 max17042_override_por(client, MAX17042_RCOMP0, config->rcomp0);
545 max17042_override_por(client, MAX17042_TempCo, config->tcompc0);
546 if (chip->chip_type) {
547 max17042_override_por(client, MAX17042_EmptyTempCo,
548 config->empty_tempco);
549 max17042_override_por(client, MAX17042_K_empty0,
554 static int max17042_init_chip(struct max17042_chip *chip)
559 max17042_override_por_values(chip);
560 /* After Power up, the MAX17042 requires 500mS in order
561 * to perform signal debouncing and initial SOC reporting
565 /* Initialize configaration */
566 max17042_write_config_regs(chip);
568 /* write cell characterization data */
569 ret = max17042_init_model(chip);
571 dev_err(&chip->client->dev, "%s init failed\n",
576 ret = max17042_verify_model_lock(chip);
578 dev_err(&chip->client->dev, "%s lock verify failed\n",
582 /* write custom parameters */
583 max17042_write_custom_regs(chip);
585 /* update capacity params */
586 max17042_update_capacity_regs(chip);
588 /* delay must be atleast 350mS to allow VFSOC
589 * to be calculated from the new configuration
593 /* reset vfsoc0 reg */
594 max17042_reset_vfsoc0_reg(chip);
596 /* load new capacity params */
597 max17042_load_new_capacity_params(chip);
599 /* Init complete, Clear the POR bit */
600 val = max17042_read_reg(chip->client, MAX17042_STATUS);
601 max17042_write_reg(chip->client, MAX17042_STATUS,
602 val & (~STATUS_POR_BIT));
606 static void max17042_set_soc_threshold(struct max17042_chip *chip, u16 off)
610 /* program interrupt thesholds such that we should
611 * get interrupt for every 'off' perc change in the soc
613 soc = max17042_read_reg(chip->client, MAX17042_RepSOC) >> 8;
614 soc_tr = (soc + off) << 8;
615 soc_tr |= (soc - off);
616 max17042_write_reg(chip->client, MAX17042_SALRT_Th, soc_tr);
619 static irqreturn_t max17042_thread_handler(int id, void *dev)
621 struct max17042_chip *chip = dev;
624 val = max17042_read_reg(chip->client, MAX17042_STATUS);
625 if ((val & STATUS_INTR_SOCMIN_BIT) ||
626 (val & STATUS_INTR_SOCMAX_BIT)) {
627 dev_info(&chip->client->dev, "SOC threshold INTR\n");
628 max17042_set_soc_threshold(chip, 1);
631 power_supply_changed(&chip->battery);
635 static void max17042_init_worker(struct work_struct *work)
637 struct max17042_chip *chip = container_of(work,
638 struct max17042_chip, work);
641 /* Initialize registers according to values from the platform data */
642 if (chip->pdata->enable_por_init && chip->pdata->config_data) {
643 ret = max17042_init_chip(chip);
648 chip->init_complete = 1;
652 static struct max17042_platform_data *
653 max17042_get_pdata(struct device *dev)
655 struct device_node *np = dev->of_node;
657 struct max17042_platform_data *pdata;
660 return dev->platform_data;
662 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
667 * Require current sense resistor value to be specified for
668 * current-sense functionality to be enabled at all.
670 if (of_property_read_u32(np, "maxim,rsns-microohm", &prop) == 0) {
672 pdata->enable_current_sense = true;
678 static struct max17042_platform_data *
679 max17042_get_pdata(struct device *dev)
681 return dev->platform_data;
685 static int max17042_probe(struct i2c_client *client,
686 const struct i2c_device_id *id)
688 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
689 struct max17042_chip *chip;
693 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
696 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
700 chip->client = client;
701 chip->pdata = max17042_get_pdata(&client->dev);
703 dev_err(&client->dev, "no platform data provided\n");
707 i2c_set_clientdata(client, chip);
709 ret = max17042_read_reg(chip->client, MAX17042_DevName);
710 if (ret == MAX17042_IC_VERSION) {
711 dev_dbg(&client->dev, "chip type max17042 detected\n");
712 chip->chip_type = MAX17042;
713 } else if (ret == MAX17047_IC_VERSION) {
714 dev_dbg(&client->dev, "chip type max17047/50 detected\n");
715 chip->chip_type = MAX17047;
717 dev_err(&client->dev, "device version mismatch: %x\n", ret);
721 chip->battery.name = "max170xx_battery";
722 chip->battery.type = POWER_SUPPLY_TYPE_BATTERY;
723 chip->battery.get_property = max17042_get_property;
724 chip->battery.properties = max17042_battery_props;
725 chip->battery.num_properties = ARRAY_SIZE(max17042_battery_props);
727 /* When current is not measured,
728 * CURRENT_NOW and CURRENT_AVG properties should be invisible. */
729 if (!chip->pdata->enable_current_sense)
730 chip->battery.num_properties -= 2;
732 if (chip->pdata->r_sns == 0)
733 chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR;
735 if (chip->pdata->init_data)
736 max17042_set_reg(client, chip->pdata->init_data,
737 chip->pdata->num_init_data);
739 if (!chip->pdata->enable_current_sense) {
740 max17042_write_reg(client, MAX17042_CGAIN, 0x0000);
741 max17042_write_reg(client, MAX17042_MiscCFG, 0x0003);
742 max17042_write_reg(client, MAX17042_LearnCFG, 0x0007);
745 ret = power_supply_register(&client->dev, &chip->battery);
747 dev_err(&client->dev, "failed: power supply register\n");
752 ret = request_threaded_irq(client->irq, NULL,
753 max17042_thread_handler,
754 IRQF_TRIGGER_FALLING,
755 chip->battery.name, chip);
757 reg = max17042_read_reg(client, MAX17042_CONFIG);
758 reg |= CONFIG_ALRT_BIT_ENBL;
759 max17042_write_reg(client, MAX17042_CONFIG, reg);
760 max17042_set_soc_threshold(chip, 1);
763 dev_err(&client->dev, "%s(): cannot get IRQ\n",
768 reg = max17042_read_reg(chip->client, MAX17042_STATUS);
769 if (reg & STATUS_POR_BIT) {
770 INIT_WORK(&chip->work, max17042_init_worker);
771 schedule_work(&chip->work);
773 chip->init_complete = 1;
779 static int max17042_remove(struct i2c_client *client)
781 struct max17042_chip *chip = i2c_get_clientdata(client);
784 free_irq(client->irq, chip);
785 power_supply_unregister(&chip->battery);
790 static int max17042_suspend(struct device *dev)
792 struct max17042_chip *chip = dev_get_drvdata(dev);
795 * disable the irq and enable irq_wake
796 * capability to the interrupt line.
798 if (chip->client->irq) {
799 disable_irq(chip->client->irq);
800 enable_irq_wake(chip->client->irq);
806 static int max17042_resume(struct device *dev)
808 struct max17042_chip *chip = dev_get_drvdata(dev);
810 if (chip->client->irq) {
811 disable_irq_wake(chip->client->irq);
812 enable_irq(chip->client->irq);
813 /* re-program the SOC thresholds to 1% change */
814 max17042_set_soc_threshold(chip, 1);
820 static const struct dev_pm_ops max17042_pm_ops = {
821 .suspend = max17042_suspend,
822 .resume = max17042_resume,
825 #define MAX17042_PM_OPS (&max17042_pm_ops)
827 #define MAX17042_PM_OPS NULL
831 static const struct of_device_id max17042_dt_match[] = {
832 { .compatible = "maxim,max17042" },
833 { .compatible = "maxim,max17047" },
834 { .compatible = "maxim,max17050" },
837 MODULE_DEVICE_TABLE(of, max17042_dt_match);
840 static const struct i2c_device_id max17042_id[] = {
846 MODULE_DEVICE_TABLE(i2c, max17042_id);
848 static struct i2c_driver max17042_i2c_driver = {
851 .of_match_table = of_match_ptr(max17042_dt_match),
852 .pm = MAX17042_PM_OPS,
854 .probe = max17042_probe,
855 .remove = max17042_remove,
856 .id_table = max17042_id,
858 module_i2c_driver(max17042_i2c_driver);
860 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
861 MODULE_DESCRIPTION("MAX17042 Fuel Gauge");
862 MODULE_LICENSE("GPL");