power/supply/max14577_charger.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 //
0003 // max14577_charger.c - Battery charger driver for the Maxim 14577/77836
0004 //
0005 // Copyright (C) 2013,2014 Samsung Electronics
0006 // Krzysztof Kozlowski <krzk@kernel.org>
0007
0008 #include <linux/module.h>
0009 #include <linux/platform_device.h>
0010 #include <linux/power_supply.h>
0011 #include <linux/mfd/max14577-private.h>
0012 #include <linux/mfd/max14577.h>
0013
0014 struct max14577_charger {
0015     struct device       *dev;
0016     struct max14577     *max14577;
0017     struct power_supply *charger;
0018
0019     struct max14577_charger_platform_data   *pdata;
0020 };
0021
0022 /*
0023  * Helper function for mapping values of STATUS2/CHGTYP register on max14577
0024  * and max77836 chipsets to enum maxim_muic_charger_type.
0025  */
0026 static enum max14577_muic_charger_type maxim_get_charger_type(
0027         enum maxim_device_type dev_type, u8 val) {
0028     switch (val) {
0029     case MAX14577_CHARGER_TYPE_NONE:
0030     case MAX14577_CHARGER_TYPE_USB:
0031     case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
0032     case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
0033     case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
0034     case MAX14577_CHARGER_TYPE_SPECIAL_1A:
0035         return val;
0036     case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
0037     case MAX14577_CHARGER_TYPE_RESERVED:
0038         if (dev_type == MAXIM_DEVICE_TYPE_MAX77836)
0039             val |= 0x8;
0040         return val;
0041     default:
0042         WARN_ONCE(1, "max14577: Unsupported chgtyp register value 0x%02x", val);
0043         return val;
0044     }
0045 }
0046
0047 static int max14577_get_charger_state(struct max14577_charger *chg, int *val)
0048 {
0049     struct regmap *rmap = chg->max14577->regmap;
0050     int ret;
0051     u8 reg_data;
0052
0053     /*
0054      * Charging occurs only if:
0055      *  - CHGCTRL2/MBCHOSTEN == 1
0056      *  - STATUS2/CGMBC == 1
0057      *
0058      * TODO:
0059      *  - handle FULL after Top-off timer (EOC register may be off
0060      *    and the charger won't be charging although MBCHOSTEN is on)
0061      *  - handle properly dead-battery charging (respect timer)
0062      *  - handle timers (fast-charge and prequal) /MBCCHGERR/
0063      */
0064     ret = max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
0065     if (ret < 0)
0066         goto out;
0067
0068     if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0) {
0069         *val = POWER_SUPPLY_STATUS_DISCHARGING;
0070         goto out;
0071     }
0072
0073     ret = max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
0074     if (ret < 0)
0075         goto out;
0076
0077     if (reg_data & STATUS3_CGMBC_MASK) {
0078         /* Charger or USB-cable is connected */
0079         if (reg_data & STATUS3_EOC_MASK)
0080             *val = POWER_SUPPLY_STATUS_FULL;
0081         else
0082             *val = POWER_SUPPLY_STATUS_CHARGING;
0083         goto out;
0084     }
0085
0086     *val = POWER_SUPPLY_STATUS_DISCHARGING;
0087
0088 out:
0089     return ret;
0090 }
0091
0092 /*
0093  * Supported charge types:
0094  *  - POWER_SUPPLY_CHARGE_TYPE_NONE
0095  *  - POWER_SUPPLY_CHARGE_TYPE_FAST
0096  */
0097 static int max14577_get_charge_type(struct max14577_charger *chg, int *val)
0098 {
0099     int ret, charging;
0100
0101     /*
0102      * TODO: CHARGE_TYPE_TRICKLE (VCHGR_RC or EOC)?
0103      * As spec says:
0104      * [after reaching EOC interrupt]
0105      * "When the battery is fully charged, the 30-minute (typ)
0106      *  top-off timer starts. The device continues to trickle
0107      *  charge the battery until the top-off timer runs out."
0108      */
0109     ret = max14577_get_charger_state(chg, &charging);
0110     if (ret < 0)
0111         return ret;
0112
0113     if (charging == POWER_SUPPLY_STATUS_CHARGING)
0114         *val = POWER_SUPPLY_CHARGE_TYPE_FAST;
0115     else
0116         *val = POWER_SUPPLY_CHARGE_TYPE_NONE;
0117
0118     return 0;
0119 }
0120
0121 static int max14577_get_online(struct max14577_charger *chg, int *val)
0122 {
0123     struct regmap *rmap = chg->max14577->regmap;
0124     u8 reg_data;
0125     int ret;
0126     enum max14577_muic_charger_type chg_type;
0127
0128     ret = max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
0129     if (ret < 0)
0130         return ret;
0131
0132     reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
0133     chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data);
0134     switch (chg_type) {
0135     case MAX14577_CHARGER_TYPE_USB:
0136     case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
0137     case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
0138     case MAX14577_CHARGER_TYPE_SPECIAL_1A:
0139     case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
0140     case MAX77836_CHARGER_TYPE_SPECIAL_BIAS:
0141         *val = 1;
0142         break;
0143     case MAX14577_CHARGER_TYPE_NONE:
0144     case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
0145     case MAX14577_CHARGER_TYPE_RESERVED:
0146     case MAX77836_CHARGER_TYPE_RESERVED:
0147     default:
0148         *val = 0;
0149     }
0150
0151     return 0;
0152 }
0153
0154 /*
0155  * Supported health statuses:
0156  *  - POWER_SUPPLY_HEALTH_DEAD
0157  *  - POWER_SUPPLY_HEALTH_OVERVOLTAGE
0158  *  - POWER_SUPPLY_HEALTH_GOOD
0159  */
0160 static int max14577_get_battery_health(struct max14577_charger *chg, int *val)
0161 {
0162     struct regmap *rmap = chg->max14577->regmap;
0163     int ret;
0164     u8 reg_data;
0165     enum max14577_muic_charger_type chg_type;
0166
0167     ret = max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
0168     if (ret < 0)
0169         goto out;
0170
0171     reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
0172     chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data);
0173     if (chg_type == MAX14577_CHARGER_TYPE_DEAD_BATTERY) {
0174         *val = POWER_SUPPLY_HEALTH_DEAD;
0175         goto out;
0176     }
0177
0178     ret = max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
0179     if (ret < 0)
0180         goto out;
0181
0182     if (reg_data & STATUS3_OVP_MASK) {
0183         *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
0184         goto out;
0185     }
0186
0187     /* Not dead, not overvoltage */
0188     *val = POWER_SUPPLY_HEALTH_GOOD;
0189
0190 out:
0191     return ret;
0192 }
0193
0194 /*
0195  * Always returns 1.
0196  * The max14577 chip doesn't report any status of battery presence.
0197  * Lets assume that it will always be used with some battery.
0198  */
0199 static int max14577_get_present(struct max14577_charger *chg, int *val)
0200 {
0201     *val = 1;
0202
0203     return 0;
0204 }
0205
0206 static int max14577_set_fast_charge_timer(struct max14577_charger *chg,
0207         unsigned long hours)
0208 {
0209     u8 reg_data;
0210
0211     switch (hours) {
0212     case 5 ... 7:
0213         reg_data = hours - 3;
0214         break;
0215     case 0:
0216         /* Disable */
0217         reg_data = 0x7;
0218         break;
0219     default:
0220         dev_err(chg->dev, "Wrong value for Fast-Charge Timer: %lu\n",
0221                 hours);
0222         return -EINVAL;
0223     }
0224     reg_data <<= CHGCTRL1_TCHW_SHIFT;
0225
0226     return max14577_update_reg(chg->max14577->regmap,
0227             MAX14577_REG_CHGCTRL1, CHGCTRL1_TCHW_MASK, reg_data);
0228 }
0229
0230 static int max14577_init_constant_voltage(struct max14577_charger *chg,
0231         unsigned int uvolt)
0232 {
0233     u8 reg_data;
0234
0235     if (uvolt < MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN ||
0236             uvolt > MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX)
0237         return -EINVAL;
0238
0239     if (uvolt == 4200000)
0240         reg_data = 0x0;
0241     else if (uvolt == MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX)
0242         reg_data = 0x1f;
0243     else if (uvolt <= 4280000) {
0244         unsigned int val = uvolt;
0245
0246         val -= MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN;
0247         val /= MAXIM_CHARGER_CONSTANT_VOLTAGE_STEP;
0248         if (uvolt <= 4180000)
0249             reg_data = 0x1 + val;
0250         else
0251             reg_data = val; /* Fix for gap between 4.18V and 4.22V */
0252     } else
0253         return -EINVAL;
0254
0255     reg_data <<= CHGCTRL3_MBCCVWRC_SHIFT;
0256
0257     return max14577_write_reg(chg->max14577->regmap,
0258             MAX14577_CHG_REG_CHG_CTRL3, reg_data);
0259 }
0260
0261 static int max14577_init_eoc(struct max14577_charger *chg,
0262         unsigned int uamp)
0263 {
0264     unsigned int current_bits;
0265     u8 reg_data;
0266
0267     switch (chg->max14577->dev_type) {
0268     case MAXIM_DEVICE_TYPE_MAX77836:
0269         if (uamp < 5000)
0270             return -EINVAL; /* Requested current is too low */
0271
0272         if (uamp >= 7500 && uamp < 10000)
0273             current_bits = 0x0;
0274         else if (uamp <= 50000) {
0275             /* <5000, 7499> and <10000, 50000> */
0276             current_bits = uamp / 5000;
0277         } else {
0278             uamp = min(uamp, 100000U) - 50000U;
0279             current_bits = 0xa + uamp / 10000;
0280         }
0281         break;
0282
0283     case MAXIM_DEVICE_TYPE_MAX14577:
0284     default:
0285         if (uamp < MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN)
0286             return -EINVAL; /* Requested current is too low */
0287
0288         uamp = min(uamp, MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX);
0289         uamp -= MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN;
0290         current_bits = uamp / MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP;
0291         break;
0292     }
0293
0294     reg_data = current_bits << CHGCTRL5_EOCS_SHIFT;
0295
0296     return max14577_update_reg(chg->max14577->regmap,
0297             MAX14577_CHG_REG_CHG_CTRL5, CHGCTRL5_EOCS_MASK,
0298             reg_data);
0299 }
0300
0301 static int max14577_init_fast_charge(struct max14577_charger *chg,
0302         unsigned int uamp)
0303 {
0304     u8 reg_data;
0305     int ret;
0306     const struct maxim_charger_current *limits =
0307         &maxim_charger_currents[chg->max14577->dev_type];
0308
0309     ret = maxim_charger_calc_reg_current(limits, uamp, uamp, &reg_data);
0310     if (ret) {
0311         dev_err(chg->dev, "Wrong value for fast charge: %u\n", uamp);
0312         return ret;
0313     }
0314
0315     return max14577_update_reg(chg->max14577->regmap,
0316             MAX14577_CHG_REG_CHG_CTRL4,
0317             CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK,
0318             reg_data);
0319 }
0320
0321 /*
0322  * Sets charger registers to proper and safe default values.
0323  * Some of these values are equal to defaults in MAX14577E
0324  * data sheet but there are minor differences.
0325  */
0326 static int max14577_charger_reg_init(struct max14577_charger *chg)
0327 {
0328     struct regmap *rmap = chg->max14577->regmap;
0329     u8 reg_data;
0330     int ret;
0331
0332     /*
0333      * Charger-Type Manual Detection, default off (set CHGTYPMAN to 0)
0334      * Charger-Detection Enable, default on (set CHGDETEN to 1)
0335      * Combined mask of CHGDETEN and CHGTYPMAN will zero the CHGTYPMAN bit
0336      */
0337     reg_data = 0x1 << CDETCTRL1_CHGDETEN_SHIFT;
0338     max14577_update_reg(rmap, MAX14577_REG_CDETCTRL1,
0339             CDETCTRL1_CHGDETEN_MASK | CDETCTRL1_CHGTYPMAN_MASK,
0340             reg_data);
0341
0342     /*
0343      * Wall-Adapter Rapid Charge, default on
0344      * Battery-Charger, default on
0345      */
0346     reg_data = 0x1 << CHGCTRL2_VCHGR_RC_SHIFT;
0347     reg_data |= 0x1 << CHGCTRL2_MBCHOSTEN_SHIFT;
0348     max14577_write_reg(rmap, MAX14577_REG_CHGCTRL2, reg_data);
0349
0350     /* Auto Charging Stop, default off */
0351     reg_data = 0x0 << CHGCTRL6_AUTOSTOP_SHIFT;
0352     max14577_write_reg(rmap, MAX14577_REG_CHGCTRL6, reg_data);
0353
0354     ret = max14577_init_constant_voltage(chg, chg->pdata->constant_uvolt);
0355     if (ret)
0356         return ret;
0357
0358     ret = max14577_init_eoc(chg, chg->pdata->eoc_uamp);
0359     if (ret)
0360         return ret;
0361
0362     ret = max14577_init_fast_charge(chg, chg->pdata->fast_charge_uamp);
0363     if (ret)
0364         return ret;
0365
0366     ret = max14577_set_fast_charge_timer(chg,
0367             MAXIM_CHARGER_FAST_CHARGE_TIMER_DEFAULT);
0368     if (ret)
0369         return ret;
0370
0371     /* Initialize Overvoltage-Protection Threshold */
0372     switch (chg->pdata->ovp_uvolt) {
0373     case 7500000:
0374         reg_data = 0x0;
0375         break;
0376     case 6000000:
0377     case 6500000:
0378     case 7000000:
0379         reg_data = 0x1 + (chg->pdata->ovp_uvolt - 6000000) / 500000;
0380         break;
0381     default:
0382         dev_err(chg->dev, "Wrong value for OVP: %u\n",
0383                 chg->pdata->ovp_uvolt);
0384         return -EINVAL;
0385     }
0386     reg_data <<= CHGCTRL7_OTPCGHCVS_SHIFT;
0387     max14577_write_reg(rmap, MAX14577_REG_CHGCTRL7, reg_data);
0388
0389     return 0;
0390 }
0391
0392 /* Support property from charger */
0393 static enum power_supply_property max14577_charger_props[] = {
0394     POWER_SUPPLY_PROP_STATUS,
0395     POWER_SUPPLY_PROP_CHARGE_TYPE,
0396     POWER_SUPPLY_PROP_HEALTH,
0397     POWER_SUPPLY_PROP_PRESENT,
0398     POWER_SUPPLY_PROP_ONLINE,
0399     POWER_SUPPLY_PROP_MODEL_NAME,
0400     POWER_SUPPLY_PROP_MANUFACTURER,
0401 };
0402
0403 static const char * const model_names[] = {
0404     [MAXIM_DEVICE_TYPE_UNKNOWN] = "MAX14577-like",
0405     [MAXIM_DEVICE_TYPE_MAX14577]    = "MAX14577",
0406     [MAXIM_DEVICE_TYPE_MAX77836]    = "MAX77836",
0407 };
0408 static const char *manufacturer = "Maxim Integrated";
0409
0410 static int max14577_charger_get_property(struct power_supply *psy,
0411                 enum power_supply_property psp,
0412                 union power_supply_propval *val)
0413 {
0414     struct max14577_charger *chg = power_supply_get_drvdata(psy);
0415     int ret = 0;
0416
0417     switch (psp) {
0418     case POWER_SUPPLY_PROP_STATUS:
0419         ret = max14577_get_charger_state(chg, &val->intval);
0420         break;
0421     case POWER_SUPPLY_PROP_CHARGE_TYPE:
0422         ret = max14577_get_charge_type(chg, &val->intval);
0423         break;
0424     case POWER_SUPPLY_PROP_HEALTH:
0425         ret = max14577_get_battery_health(chg, &val->intval);
0426         break;
0427     case POWER_SUPPLY_PROP_PRESENT:
0428         ret = max14577_get_present(chg, &val->intval);
0429         break;
0430     case POWER_SUPPLY_PROP_ONLINE:
0431         ret = max14577_get_online(chg, &val->intval);
0432         break;
0433     case POWER_SUPPLY_PROP_MODEL_NAME:
0434         BUILD_BUG_ON(ARRAY_SIZE(model_names) != MAXIM_DEVICE_TYPE_NUM);
0435         val->strval = model_names[chg->max14577->dev_type];
0436         break;
0437     case POWER_SUPPLY_PROP_MANUFACTURER:
0438         val->strval = manufacturer;
0439         break;
0440     default:
0441         return -EINVAL;
0442     }
0443
0444     return ret;
0445 }
0446
0447 static const struct power_supply_desc max14577_charger_desc = {
0448     .name = "max14577-charger",
0449     .type = POWER_SUPPLY_TYPE_BATTERY,
0450     .properties = max14577_charger_props,
0451     .num_properties = ARRAY_SIZE(max14577_charger_props),
0452     .get_property = max14577_charger_get_property,
0453 };
0454
0455 #ifdef CONFIG_OF
0456 static struct max14577_charger_platform_data *max14577_charger_dt_init(
0457         struct platform_device *pdev)
0458 {
0459     struct max14577_charger_platform_data *pdata;
0460     struct device_node *np = pdev->dev.of_node;
0461     int ret;
0462
0463     if (!np) {
0464         dev_err(&pdev->dev, "No charger OF node\n");
0465         return ERR_PTR(-EINVAL);
0466     }
0467
0468     pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
0469     if (!pdata)
0470         return ERR_PTR(-ENOMEM);
0471
0472     ret = of_property_read_u32(np, "maxim,constant-uvolt",
0473             &pdata->constant_uvolt);
0474     if (ret) {
0475         dev_err(&pdev->dev, "Cannot parse maxim,constant-uvolt field from DT\n");
0476         return ERR_PTR(ret);
0477     }
0478
0479     ret = of_property_read_u32(np, "maxim,fast-charge-uamp",
0480             &pdata->fast_charge_uamp);
0481     if (ret) {
0482         dev_err(&pdev->dev, "Cannot parse maxim,fast-charge-uamp field from DT\n");
0483         return ERR_PTR(ret);
0484     }
0485
0486     ret = of_property_read_u32(np, "maxim,eoc-uamp", &pdata->eoc_uamp);
0487     if (ret) {
0488         dev_err(&pdev->dev, "Cannot parse maxim,eoc-uamp field from DT\n");
0489         return ERR_PTR(ret);
0490     }
0491
0492     ret = of_property_read_u32(np, "maxim,ovp-uvolt", &pdata->ovp_uvolt);
0493     if (ret) {
0494         dev_err(&pdev->dev, "Cannot parse maxim,ovp-uvolt field from DT\n");
0495         return ERR_PTR(ret);
0496     }
0497
0498     return pdata;
0499 }
0500 #else /* CONFIG_OF */
0501 static struct max14577_charger_platform_data *max14577_charger_dt_init(
0502         struct platform_device *pdev)
0503 {
0504     return NULL;
0505 }
0506 #endif /* CONFIG_OF */
0507
0508 static ssize_t show_fast_charge_timer(struct device *dev,
0509         struct device_attribute *attr, char *buf)
0510 {
0511     struct max14577_charger *chg = dev_get_drvdata(dev);
0512     u8 reg_data;
0513     int ret;
0514     unsigned int val;
0515
0516     ret = max14577_read_reg(chg->max14577->regmap, MAX14577_REG_CHGCTRL1,
0517             &reg_data);
0518     if (ret)
0519         return ret;
0520
0521     reg_data &= CHGCTRL1_TCHW_MASK;
0522     reg_data >>= CHGCTRL1_TCHW_SHIFT;
0523     switch (reg_data) {
0524     case 0x2 ... 0x4:
0525         val = reg_data + 3;
0526         break;
0527     case 0x7:
0528         val = 0;
0529         break;
0530     default:
0531         val = 5;
0532         break;
0533     }
0534
0535     return scnprintf(buf, PAGE_SIZE, "%u\n", val);
0536 }
0537
0538 static ssize_t store_fast_charge_timer(struct device *dev,
0539         struct device_attribute *attr, const char *buf, size_t count)
0540 {
0541     struct max14577_charger *chg = dev_get_drvdata(dev);
0542     unsigned long val;
0543     int ret;
0544
0545     ret = kstrtoul(buf, 10, &val);
0546     if (ret)
0547         return ret;
0548
0549     ret = max14577_set_fast_charge_timer(chg, val);
0550     if (ret)
0551         return ret;
0552
0553     return count;
0554 }
0555
0556 static DEVICE_ATTR(fast_charge_timer, S_IRUGO | S_IWUSR,
0557         show_fast_charge_timer, store_fast_charge_timer);
0558
0559 static int max14577_charger_probe(struct platform_device *pdev)
0560 {
0561     struct max14577_charger *chg;
0562     struct power_supply_config psy_cfg = {};
0563     struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
0564     int ret;
0565
0566     chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
0567     if (!chg)
0568         return -ENOMEM;
0569
0570     platform_set_drvdata(pdev, chg);
0571     chg->dev = &pdev->dev;
0572     chg->max14577 = max14577;
0573
0574     chg->pdata = max14577_charger_dt_init(pdev);
0575     if (IS_ERR_OR_NULL(chg->pdata))
0576         return PTR_ERR(chg->pdata);
0577
0578     ret = max14577_charger_reg_init(chg);
0579     if (ret)
0580         return ret;
0581
0582     ret = device_create_file(&pdev->dev, &dev_attr_fast_charge_timer);
0583     if (ret) {
0584         dev_err(&pdev->dev, "failed: create sysfs entry\n");
0585         return ret;
0586     }
0587
0588     psy_cfg.drv_data = chg;
0589     chg->charger = power_supply_register(&pdev->dev, &max14577_charger_desc,
0590                         &psy_cfg);
0591     if (IS_ERR(chg->charger)) {
0592         dev_err(&pdev->dev, "failed: power supply register\n");
0593         ret = PTR_ERR(chg->charger);
0594         goto err;
0595     }
0596
0597     /* Check for valid values for charger */
0598     BUILD_BUG_ON(MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN +
0599             MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP * 0xf !=
0600             MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX);
0601     return 0;
0602
0603 err:
0604     device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
0605
0606     return ret;
0607 }
0608
0609 static int max14577_charger_remove(struct platform_device *pdev)
0610 {
0611     struct max14577_charger *chg = platform_get_drvdata(pdev);
0612
0613     device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
0614     power_supply_unregister(chg->charger);
0615
0616     return 0;
0617 }
0618
0619 static const struct platform_device_id max14577_charger_id[] = {
0620     { "max14577-charger", MAXIM_DEVICE_TYPE_MAX14577, },
0621     { "max77836-charger", MAXIM_DEVICE_TYPE_MAX77836, },
0622     { }
0623 };
0624 MODULE_DEVICE_TABLE(platform, max14577_charger_id);
0625
0626 static const struct of_device_id of_max14577_charger_dt_match[] = {
0627     { .compatible = "maxim,max14577-charger",
0628       .data = (void *)MAXIM_DEVICE_TYPE_MAX14577, },
0629     { .compatible = "maxim,max77836-charger",
0630       .data = (void *)MAXIM_DEVICE_TYPE_MAX77836, },
0631     { },
0632 };
0633 MODULE_DEVICE_TABLE(of, of_max14577_charger_dt_match);
0634
0635 static struct platform_driver max14577_charger_driver = {
0636     .driver = {
0637         .name   = "max14577-charger",
0638         .of_match_table = of_max14577_charger_dt_match,
0639     },
0640     .probe      = max14577_charger_probe,
0641     .remove     = max14577_charger_remove,
0642     .id_table   = max14577_charger_id,
0643 };
0644 module_platform_driver(max14577_charger_driver);
0645
0646 MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
0647 MODULE_DESCRIPTION("Maxim 14577/77836 charger driver");
0648 MODULE_LICENSE("GPL");