763 lines
18 KiB
C
763 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// max77693_charger.c - Battery charger driver for the Maxim 77693
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//
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// Copyright (C) 2014 Samsung Electronics
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// Krzysztof Kozlowski <krzk@kernel.org>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/regmap.h>
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#include <linux/mfd/max77693.h>
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#include <linux/mfd/max77693-common.h>
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#include <linux/mfd/max77693-private.h>
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#define MAX77693_CHARGER_NAME "max77693-charger"
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static const char *max77693_charger_model = "MAX77693";
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static const char *max77693_charger_manufacturer = "Maxim Integrated";
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struct max77693_charger {
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struct device *dev;
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struct max77693_dev *max77693;
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struct power_supply *charger;
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u32 constant_volt;
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u32 min_system_volt;
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u32 thermal_regulation_temp;
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u32 batttery_overcurrent;
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u32 charge_input_threshold_volt;
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};
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static int max77693_get_charger_state(struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int data;
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ret = regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data);
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if (ret < 0)
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return ret;
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data &= CHG_DETAILS_01_CHG_MASK;
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data >>= CHG_DETAILS_01_CHG_SHIFT;
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switch (data) {
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case MAX77693_CHARGING_PREQUALIFICATION:
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case MAX77693_CHARGING_FAST_CONST_CURRENT:
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case MAX77693_CHARGING_FAST_CONST_VOLTAGE:
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case MAX77693_CHARGING_TOP_OFF:
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/* In high temp the charging current is reduced, but still charging */
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case MAX77693_CHARGING_HIGH_TEMP:
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*val = POWER_SUPPLY_STATUS_CHARGING;
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break;
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case MAX77693_CHARGING_DONE:
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*val = POWER_SUPPLY_STATUS_FULL;
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break;
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case MAX77693_CHARGING_TIMER_EXPIRED:
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case MAX77693_CHARGING_THERMISTOR_SUSPEND:
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*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
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break;
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case MAX77693_CHARGING_OFF:
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case MAX77693_CHARGING_OVER_TEMP:
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case MAX77693_CHARGING_WATCHDOG_EXPIRED:
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*val = POWER_SUPPLY_STATUS_DISCHARGING;
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break;
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case MAX77693_CHARGING_RESERVED:
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default:
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*val = POWER_SUPPLY_STATUS_UNKNOWN;
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}
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return 0;
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}
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static int max77693_get_charge_type(struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int data;
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ret = regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data);
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if (ret < 0)
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return ret;
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data &= CHG_DETAILS_01_CHG_MASK;
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data >>= CHG_DETAILS_01_CHG_SHIFT;
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switch (data) {
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case MAX77693_CHARGING_PREQUALIFICATION:
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/*
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* Top-off: trickle or fast? In top-off the current varies between
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* 100 and 250 mA. It is higher than prequalification current.
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*/
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case MAX77693_CHARGING_TOP_OFF:
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*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
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break;
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case MAX77693_CHARGING_FAST_CONST_CURRENT:
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case MAX77693_CHARGING_FAST_CONST_VOLTAGE:
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/* In high temp the charging current is reduced, but still charging */
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case MAX77693_CHARGING_HIGH_TEMP:
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*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
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break;
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case MAX77693_CHARGING_DONE:
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case MAX77693_CHARGING_TIMER_EXPIRED:
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case MAX77693_CHARGING_THERMISTOR_SUSPEND:
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case MAX77693_CHARGING_OFF:
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case MAX77693_CHARGING_OVER_TEMP:
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case MAX77693_CHARGING_WATCHDOG_EXPIRED:
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*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
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break;
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case MAX77693_CHARGING_RESERVED:
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default:
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*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
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}
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return 0;
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}
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/*
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* Supported health statuses:
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* - POWER_SUPPLY_HEALTH_DEAD
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* - POWER_SUPPLY_HEALTH_GOOD
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* - POWER_SUPPLY_HEALTH_OVERVOLTAGE
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* - POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE
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* - POWER_SUPPLY_HEALTH_UNKNOWN
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* - POWER_SUPPLY_HEALTH_UNSPEC_FAILURE
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*/
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static int max77693_get_battery_health(struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int data;
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ret = regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data);
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if (ret < 0)
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return ret;
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data &= CHG_DETAILS_01_BAT_MASK;
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data >>= CHG_DETAILS_01_BAT_SHIFT;
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switch (data) {
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case MAX77693_BATTERY_NOBAT:
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*val = POWER_SUPPLY_HEALTH_DEAD;
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break;
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case MAX77693_BATTERY_PREQUALIFICATION:
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case MAX77693_BATTERY_GOOD:
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case MAX77693_BATTERY_LOWVOLTAGE:
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*val = POWER_SUPPLY_HEALTH_GOOD;
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break;
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case MAX77693_BATTERY_TIMER_EXPIRED:
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/*
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* Took longer to charge than expected, charging suspended.
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* Damaged battery?
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*/
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*val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
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break;
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case MAX77693_BATTERY_OVERVOLTAGE:
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*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
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break;
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case MAX77693_BATTERY_OVERCURRENT:
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*val = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
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break;
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case MAX77693_BATTERY_RESERVED:
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default:
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*val = POWER_SUPPLY_HEALTH_UNKNOWN;
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break;
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}
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return 0;
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}
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static int max77693_get_present(struct regmap *regmap, int *val)
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{
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unsigned int data;
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int ret;
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/*
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* Read CHG_INT_OK register. High DETBAT bit here should be
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* equal to value 0x0 in CHG_DETAILS_01/BAT field.
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*/
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ret = regmap_read(regmap, MAX77693_CHG_REG_CHG_INT_OK, &data);
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if (ret < 0)
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return ret;
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*val = (data & CHG_INT_OK_DETBAT_MASK) ? 0 : 1;
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return 0;
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}
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static int max77693_get_online(struct regmap *regmap, int *val)
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{
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unsigned int data;
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int ret;
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ret = regmap_read(regmap, MAX77693_CHG_REG_CHG_INT_OK, &data);
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if (ret < 0)
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return ret;
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*val = (data & CHG_INT_OK_CHGIN_MASK) ? 1 : 0;
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return 0;
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}
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static enum power_supply_property max77693_charger_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_CHARGE_TYPE,
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER,
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};
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static int max77693_charger_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct max77693_charger *chg = power_supply_get_drvdata(psy);
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struct regmap *regmap = chg->max77693->regmap;
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int ret = 0;
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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ret = max77693_get_charger_state(regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_CHARGE_TYPE:
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ret = max77693_get_charge_type(regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_HEALTH:
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ret = max77693_get_battery_health(regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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ret = max77693_get_present(regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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ret = max77693_get_online(regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = max77693_charger_model;
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break;
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case POWER_SUPPLY_PROP_MANUFACTURER:
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val->strval = max77693_charger_manufacturer;
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break;
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default:
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return -EINVAL;
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}
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return ret;
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}
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static const struct power_supply_desc max77693_charger_desc = {
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.name = MAX77693_CHARGER_NAME,
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.type = POWER_SUPPLY_TYPE_BATTERY,
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.properties = max77693_charger_props,
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.num_properties = ARRAY_SIZE(max77693_charger_props),
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.get_property = max77693_charger_get_property,
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};
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static ssize_t device_attr_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count,
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int (*fn)(struct max77693_charger *, unsigned long))
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{
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struct max77693_charger *chg = dev_get_drvdata(dev);
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unsigned long val;
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int ret;
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ret = kstrtoul(buf, 10, &val);
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if (ret)
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return ret;
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ret = fn(chg, val);
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if (ret)
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return ret;
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return count;
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}
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static ssize_t fast_charge_timer_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct max77693_charger *chg = dev_get_drvdata(dev);
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unsigned int data, val;
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int ret;
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ret = regmap_read(chg->max77693->regmap, MAX77693_CHG_REG_CHG_CNFG_01,
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&data);
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if (ret < 0)
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return ret;
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data &= CHG_CNFG_01_FCHGTIME_MASK;
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data >>= CHG_CNFG_01_FCHGTIME_SHIFT;
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switch (data) {
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case 0x1 ... 0x7:
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/* Starting from 4 hours, step by 2 hours */
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val = 4 + (data - 1) * 2;
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break;
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case 0x0:
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default:
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val = 0;
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break;
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}
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return scnprintf(buf, PAGE_SIZE, "%u\n", val);
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}
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static int max77693_set_fast_charge_timer(struct max77693_charger *chg,
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unsigned long hours)
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{
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unsigned int data;
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/*
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* 0x00 - disable
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* 0x01 - 4h
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* 0x02 - 6h
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* ...
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* 0x07 - 16h
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* Round down odd values.
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*/
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switch (hours) {
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case 4 ... 16:
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data = (hours - 4) / 2 + 1;
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break;
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case 0:
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/* Disable */
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data = 0;
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break;
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default:
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return -EINVAL;
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}
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data <<= CHG_CNFG_01_FCHGTIME_SHIFT;
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return regmap_update_bits(chg->max77693->regmap,
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MAX77693_CHG_REG_CHG_CNFG_01,
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CHG_CNFG_01_FCHGTIME_MASK, data);
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}
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static ssize_t fast_charge_timer_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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return device_attr_store(dev, attr, buf, count,
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max77693_set_fast_charge_timer);
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}
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static ssize_t top_off_threshold_current_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct max77693_charger *chg = dev_get_drvdata(dev);
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unsigned int data, val;
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int ret;
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ret = regmap_read(chg->max77693->regmap, MAX77693_CHG_REG_CHG_CNFG_03,
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&data);
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if (ret < 0)
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return ret;
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data &= CHG_CNFG_03_TOITH_MASK;
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data >>= CHG_CNFG_03_TOITH_SHIFT;
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if (data <= 0x04)
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val = 100000 + data * 25000;
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else
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val = data * 50000;
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return scnprintf(buf, PAGE_SIZE, "%u\n", val);
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}
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static int max77693_set_top_off_threshold_current(struct max77693_charger *chg,
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unsigned long uamp)
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{
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unsigned int data;
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if (uamp < 100000 || uamp > 350000)
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return -EINVAL;
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if (uamp <= 200000)
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data = (uamp - 100000) / 25000;
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else
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/* (200000, 350000> */
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data = uamp / 50000;
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data <<= CHG_CNFG_03_TOITH_SHIFT;
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return regmap_update_bits(chg->max77693->regmap,
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MAX77693_CHG_REG_CHG_CNFG_03,
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CHG_CNFG_03_TOITH_MASK, data);
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}
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static ssize_t top_off_threshold_current_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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return device_attr_store(dev, attr, buf, count,
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max77693_set_top_off_threshold_current);
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}
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static ssize_t top_off_timer_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct max77693_charger *chg = dev_get_drvdata(dev);
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unsigned int data, val;
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int ret;
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ret = regmap_read(chg->max77693->regmap, MAX77693_CHG_REG_CHG_CNFG_03,
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&data);
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if (ret < 0)
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return ret;
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data &= CHG_CNFG_03_TOTIME_MASK;
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data >>= CHG_CNFG_03_TOTIME_SHIFT;
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val = data * 10;
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return scnprintf(buf, PAGE_SIZE, "%u\n", val);
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}
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static int max77693_set_top_off_timer(struct max77693_charger *chg,
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unsigned long minutes)
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{
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unsigned int data;
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if (minutes > 70)
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return -EINVAL;
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data = minutes / 10;
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data <<= CHG_CNFG_03_TOTIME_SHIFT;
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return regmap_update_bits(chg->max77693->regmap,
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MAX77693_CHG_REG_CHG_CNFG_03,
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CHG_CNFG_03_TOTIME_MASK, data);
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}
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static ssize_t top_off_timer_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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return device_attr_store(dev, attr, buf, count,
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max77693_set_top_off_timer);
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}
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static DEVICE_ATTR_RW(fast_charge_timer);
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static DEVICE_ATTR_RW(top_off_threshold_current);
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static DEVICE_ATTR_RW(top_off_timer);
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static int max77693_set_constant_volt(struct max77693_charger *chg,
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unsigned int uvolt)
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{
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unsigned int data;
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/*
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* 0x00 - 3.650 V
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* 0x01 - 3.675 V
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* ...
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* 0x1b - 4.325 V
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* 0x1c - 4.340 V
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* 0x1d - 4.350 V
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* 0x1e - 4.375 V
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* 0x1f - 4.400 V
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*/
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if (uvolt >= 3650000 && uvolt < 4340000)
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data = (uvolt - 3650000) / 25000;
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else if (uvolt >= 4340000 && uvolt < 4350000)
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data = 0x1c;
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else if (uvolt >= 4350000 && uvolt <= 4400000)
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data = 0x1d + (uvolt - 4350000) / 25000;
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else {
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dev_err(chg->dev, "Wrong value for charging constant voltage\n");
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return -EINVAL;
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}
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data <<= CHG_CNFG_04_CHGCVPRM_SHIFT;
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dev_dbg(chg->dev, "Charging constant voltage: %u (0x%x)\n", uvolt,
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data);
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return regmap_update_bits(chg->max77693->regmap,
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MAX77693_CHG_REG_CHG_CNFG_04,
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CHG_CNFG_04_CHGCVPRM_MASK, data);
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}
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static int max77693_set_min_system_volt(struct max77693_charger *chg,
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unsigned int uvolt)
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{
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unsigned int data;
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if (uvolt < 3000000 || uvolt > 3700000) {
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dev_err(chg->dev, "Wrong value for minimum system regulation voltage\n");
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return -EINVAL;
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}
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data = (uvolt - 3000000) / 100000;
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data <<= CHG_CNFG_04_MINVSYS_SHIFT;
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dev_dbg(chg->dev, "Minimum system regulation voltage: %u (0x%x)\n",
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uvolt, data);
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return regmap_update_bits(chg->max77693->regmap,
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MAX77693_CHG_REG_CHG_CNFG_04,
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CHG_CNFG_04_MINVSYS_MASK, data);
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}
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static int max77693_set_thermal_regulation_temp(struct max77693_charger *chg,
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unsigned int cels)
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{
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unsigned int data;
|
|
|
|
switch (cels) {
|
|
case 70:
|
|
case 85:
|
|
case 100:
|
|
case 115:
|
|
data = (cels - 70) / 15;
|
|
break;
|
|
default:
|
|
dev_err(chg->dev, "Wrong value for thermal regulation loop temperature\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
data <<= CHG_CNFG_07_REGTEMP_SHIFT;
|
|
|
|
dev_dbg(chg->dev, "Thermal regulation loop temperature: %u (0x%x)\n",
|
|
cels, data);
|
|
|
|
return regmap_update_bits(chg->max77693->regmap,
|
|
MAX77693_CHG_REG_CHG_CNFG_07,
|
|
CHG_CNFG_07_REGTEMP_MASK, data);
|
|
}
|
|
|
|
static int max77693_set_batttery_overcurrent(struct max77693_charger *chg,
|
|
unsigned int uamp)
|
|
{
|
|
unsigned int data;
|
|
|
|
if (uamp && (uamp < 2000000 || uamp > 3500000)) {
|
|
dev_err(chg->dev, "Wrong value for battery overcurrent\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (uamp)
|
|
data = ((uamp - 2000000) / 250000) + 1;
|
|
else
|
|
data = 0; /* disable */
|
|
|
|
data <<= CHG_CNFG_12_B2SOVRC_SHIFT;
|
|
|
|
dev_dbg(chg->dev, "Battery overcurrent: %u (0x%x)\n", uamp, data);
|
|
|
|
return regmap_update_bits(chg->max77693->regmap,
|
|
MAX77693_CHG_REG_CHG_CNFG_12,
|
|
CHG_CNFG_12_B2SOVRC_MASK, data);
|
|
}
|
|
|
|
static int max77693_set_charge_input_threshold_volt(struct max77693_charger *chg,
|
|
unsigned int uvolt)
|
|
{
|
|
unsigned int data;
|
|
|
|
switch (uvolt) {
|
|
case 4300000:
|
|
data = 0x0;
|
|
break;
|
|
case 4700000:
|
|
case 4800000:
|
|
case 4900000:
|
|
data = (uvolt - 4700000) / 100000;
|
|
break;
|
|
default:
|
|
dev_err(chg->dev, "Wrong value for charge input voltage regulation threshold\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
data <<= CHG_CNFG_12_VCHGINREG_SHIFT;
|
|
|
|
dev_dbg(chg->dev, "Charge input voltage regulation threshold: %u (0x%x)\n",
|
|
uvolt, data);
|
|
|
|
return regmap_update_bits(chg->max77693->regmap,
|
|
MAX77693_CHG_REG_CHG_CNFG_12,
|
|
CHG_CNFG_12_VCHGINREG_MASK, data);
|
|
}
|
|
|
|
/*
|
|
* Sets charger registers to proper and safe default values.
|
|
*/
|
|
static int max77693_reg_init(struct max77693_charger *chg)
|
|
{
|
|
int ret;
|
|
unsigned int data;
|
|
|
|
/* Unlock charger register protection */
|
|
data = (0x3 << CHG_CNFG_06_CHGPROT_SHIFT);
|
|
ret = regmap_update_bits(chg->max77693->regmap,
|
|
MAX77693_CHG_REG_CHG_CNFG_06,
|
|
CHG_CNFG_06_CHGPROT_MASK, data);
|
|
if (ret) {
|
|
dev_err(chg->dev, "Error unlocking registers: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = max77693_set_fast_charge_timer(chg, DEFAULT_FAST_CHARGE_TIMER);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max77693_set_top_off_threshold_current(chg,
|
|
DEFAULT_TOP_OFF_THRESHOLD_CURRENT);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max77693_set_top_off_timer(chg, DEFAULT_TOP_OFF_TIMER);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max77693_set_constant_volt(chg, chg->constant_volt);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max77693_set_min_system_volt(chg, chg->min_system_volt);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max77693_set_thermal_regulation_temp(chg,
|
|
chg->thermal_regulation_temp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max77693_set_batttery_overcurrent(chg, chg->batttery_overcurrent);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return max77693_set_charge_input_threshold_volt(chg,
|
|
chg->charge_input_threshold_volt);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static int max77693_dt_init(struct device *dev, struct max77693_charger *chg)
|
|
{
|
|
struct device_node *np = dev->of_node;
|
|
|
|
if (!np) {
|
|
dev_err(dev, "no charger OF node\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (of_property_read_u32(np, "maxim,constant-microvolt",
|
|
&chg->constant_volt))
|
|
chg->constant_volt = DEFAULT_CONSTANT_VOLT;
|
|
|
|
if (of_property_read_u32(np, "maxim,min-system-microvolt",
|
|
&chg->min_system_volt))
|
|
chg->min_system_volt = DEFAULT_MIN_SYSTEM_VOLT;
|
|
|
|
if (of_property_read_u32(np, "maxim,thermal-regulation-celsius",
|
|
&chg->thermal_regulation_temp))
|
|
chg->thermal_regulation_temp = DEFAULT_THERMAL_REGULATION_TEMP;
|
|
|
|
if (of_property_read_u32(np, "maxim,battery-overcurrent-microamp",
|
|
&chg->batttery_overcurrent))
|
|
chg->batttery_overcurrent = DEFAULT_BATTERY_OVERCURRENT;
|
|
|
|
if (of_property_read_u32(np, "maxim,charge-input-threshold-microvolt",
|
|
&chg->charge_input_threshold_volt))
|
|
chg->charge_input_threshold_volt =
|
|
DEFAULT_CHARGER_INPUT_THRESHOLD_VOLT;
|
|
|
|
return 0;
|
|
}
|
|
#else /* CONFIG_OF */
|
|
static int max77693_dt_init(struct device *dev, struct max77693_charger *chg)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_OF */
|
|
|
|
static int max77693_charger_probe(struct platform_device *pdev)
|
|
{
|
|
struct max77693_charger *chg;
|
|
struct power_supply_config psy_cfg = {};
|
|
struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
|
|
int ret;
|
|
|
|
chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
|
|
if (!chg)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, chg);
|
|
chg->dev = &pdev->dev;
|
|
chg->max77693 = max77693;
|
|
|
|
ret = max77693_dt_init(&pdev->dev, chg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max77693_reg_init(chg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
psy_cfg.drv_data = chg;
|
|
|
|
ret = device_create_file(&pdev->dev, &dev_attr_fast_charge_timer);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed: create fast charge timer sysfs entry\n");
|
|
goto err;
|
|
}
|
|
|
|
ret = device_create_file(&pdev->dev,
|
|
&dev_attr_top_off_threshold_current);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed: create top off current sysfs entry\n");
|
|
goto err;
|
|
}
|
|
|
|
ret = device_create_file(&pdev->dev, &dev_attr_top_off_timer);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed: create top off timer sysfs entry\n");
|
|
goto err;
|
|
}
|
|
|
|
chg->charger = power_supply_register(&pdev->dev,
|
|
&max77693_charger_desc,
|
|
&psy_cfg);
|
|
if (IS_ERR(chg->charger)) {
|
|
dev_err(&pdev->dev, "failed: power supply register\n");
|
|
ret = PTR_ERR(chg->charger);
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
device_remove_file(&pdev->dev, &dev_attr_top_off_timer);
|
|
device_remove_file(&pdev->dev, &dev_attr_top_off_threshold_current);
|
|
device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int max77693_charger_remove(struct platform_device *pdev)
|
|
{
|
|
struct max77693_charger *chg = platform_get_drvdata(pdev);
|
|
|
|
device_remove_file(&pdev->dev, &dev_attr_top_off_timer);
|
|
device_remove_file(&pdev->dev, &dev_attr_top_off_threshold_current);
|
|
device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
|
|
|
|
power_supply_unregister(chg->charger);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id max77693_charger_id[] = {
|
|
{ "max77693-charger", 0, },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, max77693_charger_id);
|
|
|
|
static struct platform_driver max77693_charger_driver = {
|
|
.driver = {
|
|
.name = "max77693-charger",
|
|
},
|
|
.probe = max77693_charger_probe,
|
|
.remove = max77693_charger_remove,
|
|
.id_table = max77693_charger_id,
|
|
};
|
|
module_platform_driver(max77693_charger_driver);
|
|
|
|
MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
|
|
MODULE_DESCRIPTION("Maxim 77693 charger driver");
|
|
MODULE_LICENSE("GPL");
|