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power: max77693: Add charger driver for Maxim 77693
Add new driver for Maxim 77693 switch-mode charger (part of max77693 MFD driver) providing power supply class information to userspace. The charger has +20V tolerant input. Current input can be set from 0 to 2.58 A. The charger can deliver up to 2.1 A to the battery or 3.5 A to the system (when supplying additional current from battery to system). The driver is configured through DTS (battery and system related settings) and sysfs entries (timers and top-off charging threshold). Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Krzysztof Kozlowski
Sebastian Reichel
parent
4b6eade76a
commit
87c2d90678
@ -332,6 +332,12 @@ config CHARGER_MAX14577
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Say Y to enable support for the battery charger control sysfs and
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Say Y to enable support for the battery charger control sysfs and
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platform data of MAX14577/77836 MUICs.
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platform data of MAX14577/77836 MUICs.
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config CHARGER_MAX77693
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tristate "Maxim MAX77693 battery charger driver"
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depends on MFD_MAX77693
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help
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Say Y to enable support for the Maxim MAX77693 battery charger.
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config CHARGER_MAX8997
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config CHARGER_MAX8997
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tristate "Maxim MAX8997/MAX8966 PMIC battery charger driver"
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tristate "Maxim MAX8997/MAX8966 PMIC battery charger driver"
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depends on MFD_MAX8997 && REGULATOR_MAX8997
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depends on MFD_MAX8997 && REGULATOR_MAX8997
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@ -51,6 +51,7 @@ obj-$(CONFIG_CHARGER_LP8788) += lp8788-charger.o
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obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
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obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
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obj-$(CONFIG_CHARGER_MANAGER) += charger-manager.o
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obj-$(CONFIG_CHARGER_MANAGER) += charger-manager.o
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obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
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obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
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obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
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obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
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obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
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obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
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obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
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obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
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obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
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758
drivers/power/max77693_charger.c
Normal file
758
drivers/power/max77693_charger.c
Normal file
@ -0,0 +1,758 @@
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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 <k.kozlowski@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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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-private.h>
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static const char *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)
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{
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int state;
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unsigned int data;
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if (regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data) < 0)
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return POWER_SUPPLY_STATUS_UNKNOWN;
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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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state = POWER_SUPPLY_STATUS_CHARGING;
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break;
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case MAX77693_CHARGING_DONE:
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state = 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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state = 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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state = 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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state = POWER_SUPPLY_STATUS_UNKNOWN;
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}
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return state;
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}
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static int max77693_get_charge_type(struct regmap *regmap)
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{
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int state;
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unsigned int data;
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if (regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data) < 0)
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return POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
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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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state = 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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state = 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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state = 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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state = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
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}
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return state;
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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)
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{
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int state;
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unsigned int data;
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if (regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data) < 0)
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return POWER_SUPPLY_HEALTH_UNKNOWN;
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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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state = 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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state = 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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state = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
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break;
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case MAX77693_BATTERY_OVERVOLTAGE:
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state = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
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break;
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case MAX77693_BATTERY_OVERCURRENT:
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state = 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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state = POWER_SUPPLY_HEALTH_UNKNOWN;
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break;
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}
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return state;
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}
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static int max77693_get_present(struct regmap *regmap)
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{
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unsigned int data;
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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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regmap_read(regmap, MAX77693_CHG_REG_CHG_INT_OK, &data);
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if (data & CHG_INT_OK_DETBAT_MASK)
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return 0;
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return 1;
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}
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static int max77693_get_online(struct regmap *regmap)
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{
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unsigned int data;
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regmap_read(regmap, MAX77693_CHG_REG_CHG_INT_OK, &data);
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if (data & CHG_INT_OK_CHGIN_MASK)
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return 1;
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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 = container_of(psy,
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struct max77693_charger,
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charger);
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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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val->intval = max77693_get_charger_state(regmap);
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break;
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case POWER_SUPPLY_PROP_CHARGE_TYPE:
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val->intval = max77693_get_charge_type(regmap);
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break;
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case POWER_SUPPLY_PROP_HEALTH:
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val->intval = max77693_get_battery_health(regmap);
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = max77693_get_present(regmap);
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = max77693_get_online(regmap);
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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 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)
|
||||||
|
{
|
||||||
|
return device_attr_store(dev, attr, buf, count,
|
||||||
|
max77693_set_fast_charge_timer);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t top_off_threshold_current_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
struct max77693_charger *chg = dev_get_drvdata(dev);
|
||||||
|
unsigned int data, val;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = regmap_read(chg->max77693->regmap, MAX77693_CHG_REG_CHG_CNFG_03,
|
||||||
|
&data);
|
||||||
|
if (ret < 0)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
data &= CHG_CNFG_03_TOITH_MASK;
|
||||||
|
data >>= CHG_CNFG_03_TOITH_SHIFT;
|
||||||
|
|
||||||
|
if (data <= 0x04)
|
||||||
|
val = 100000 + data * 25000;
|
||||||
|
else
|
||||||
|
val = data * 50000;
|
||||||
|
|
||||||
|
return scnprintf(buf, PAGE_SIZE, "%u\n", val);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int max77693_set_top_off_threshold_current(struct max77693_charger *chg,
|
||||||
|
unsigned long uamp)
|
||||||
|
{
|
||||||
|
unsigned int data;
|
||||||
|
|
||||||
|
if (uamp < 100000 || uamp > 350000)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
if (uamp <= 200000)
|
||||||
|
data = (uamp - 100000) / 25000;
|
||||||
|
else
|
||||||
|
/* (200000, 350000> */
|
||||||
|
data = uamp / 50000;
|
||||||
|
|
||||||
|
data <<= CHG_CNFG_03_TOITH_SHIFT;
|
||||||
|
|
||||||
|
return regmap_update_bits(chg->max77693->regmap,
|
||||||
|
MAX77693_CHG_REG_CHG_CNFG_03,
|
||||||
|
CHG_CNFG_03_TOITH_MASK, data);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t top_off_threshold_current_store(struct device *dev,
|
||||||
|
struct device_attribute *attr, const char *buf, size_t count)
|
||||||
|
{
|
||||||
|
return device_attr_store(dev, attr, buf, count,
|
||||||
|
max77693_set_top_off_threshold_current);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t top_off_timer_show(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
struct max77693_charger *chg = dev_get_drvdata(dev);
|
||||||
|
unsigned int data, val;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = regmap_read(chg->max77693->regmap, MAX77693_CHG_REG_CHG_CNFG_03,
|
||||||
|
&data);
|
||||||
|
if (ret < 0)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
data &= CHG_CNFG_03_TOTIME_MASK;
|
||||||
|
data >>= CHG_CNFG_03_TOTIME_SHIFT;
|
||||||
|
|
||||||
|
val = data * 10;
|
||||||
|
|
||||||
|
return scnprintf(buf, PAGE_SIZE, "%u\n", val);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int max77693_set_top_off_timer(struct max77693_charger *chg,
|
||||||
|
unsigned long minutes)
|
||||||
|
{
|
||||||
|
unsigned int data;
|
||||||
|
|
||||||
|
if (minutes > 70)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
data = minutes / 10;
|
||||||
|
data <<= CHG_CNFG_03_TOTIME_SHIFT;
|
||||||
|
|
||||||
|
return regmap_update_bits(chg->max77693->regmap,
|
||||||
|
MAX77693_CHG_REG_CHG_CNFG_03,
|
||||||
|
CHG_CNFG_03_TOTIME_MASK, data);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t top_off_timer_store(struct device *dev,
|
||||||
|
struct device_attribute *attr, const char *buf, size_t count)
|
||||||
|
{
|
||||||
|
return device_attr_store(dev, attr, buf, count,
|
||||||
|
max77693_set_top_off_timer);
|
||||||
|
}
|
||||||
|
|
||||||
|
static DEVICE_ATTR_RW(fast_charge_timer);
|
||||||
|
static DEVICE_ATTR_RW(top_off_threshold_current);
|
||||||
|
static DEVICE_ATTR_RW(top_off_timer);
|
||||||
|
|
||||||
|
static int max77693_set_constant_volt(struct max77693_charger *chg,
|
||||||
|
unsigned int uvolt)
|
||||||
|
{
|
||||||
|
unsigned int data;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 0x00 - 3.650 V
|
||||||
|
* 0x01 - 3.675 V
|
||||||
|
* ...
|
||||||
|
* 0x1b - 4.325 V
|
||||||
|
* 0x1c - 4.340 V
|
||||||
|
* 0x1d - 4.350 V
|
||||||
|
* 0x1e - 4.375 V
|
||||||
|
* 0x1f - 4.400 V
|
||||||
|
*/
|
||||||
|
if (uvolt >= 3650000 && uvolt < 4340000)
|
||||||
|
data = (uvolt - 3650000) / 25000;
|
||||||
|
else if (uvolt >= 4340000 && uvolt < 4350000)
|
||||||
|
data = 0x1c;
|
||||||
|
else if (uvolt >= 4350000 && uvolt <= 4400000)
|
||||||
|
data = 0x1d + (uvolt - 4350000) / 25000;
|
||||||
|
else {
|
||||||
|
dev_err(chg->dev, "Wrong value for charging constant voltage\n");
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
data <<= CHG_CNFG_04_CHGCVPRM_SHIFT;
|
||||||
|
|
||||||
|
dev_dbg(chg->dev, "Charging constant voltage: %u (0x%x)\n", uvolt,
|
||||||
|
data);
|
||||||
|
|
||||||
|
return regmap_update_bits(chg->max77693->regmap,
|
||||||
|
MAX77693_CHG_REG_CHG_CNFG_04,
|
||||||
|
CHG_CNFG_04_CHGCVPRM_MASK, data);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int max77693_set_min_system_volt(struct max77693_charger *chg,
|
||||||
|
unsigned int uvolt)
|
||||||
|
{
|
||||||
|
unsigned int data;
|
||||||
|
|
||||||
|
if (uvolt < 3000000 || uvolt > 3700000) {
|
||||||
|
dev_err(chg->dev, "Wrong value for minimum system regulation voltage\n");
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
data = (uvolt - 3000000) / 100000;
|
||||||
|
|
||||||
|
data <<= CHG_CNFG_04_MINVSYS_SHIFT;
|
||||||
|
|
||||||
|
dev_dbg(chg->dev, "Minimum system regulation voltage: %u (0x%x)\n",
|
||||||
|
uvolt, data);
|
||||||
|
|
||||||
|
return regmap_update_bits(chg->max77693->regmap,
|
||||||
|
MAX77693_CHG_REG_CHG_CNFG_04,
|
||||||
|
CHG_CNFG_04_MINVSYS_MASK, data);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int max77693_set_thermal_regulation_temp(struct max77693_charger *chg,
|
||||||
|
unsigned int cels)
|
||||||
|
{
|
||||||
|
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;
|
||||||
|
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;
|
||||||
|
|
||||||
|
ret = max77693_set_charge_input_threshold_volt(chg,
|
||||||
|
chg->charge_input_threshold_volt);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#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 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;
|
||||||
|
|
||||||
|
chg->charger.name = max77693_charger_name;
|
||||||
|
chg->charger.type = POWER_SUPPLY_TYPE_BATTERY;
|
||||||
|
chg->charger.properties = max77693_charger_props;
|
||||||
|
chg->charger.num_properties = ARRAY_SIZE(max77693_charger_props);
|
||||||
|
chg->charger.get_property = max77693_charger_get_property;
|
||||||
|
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = power_supply_register(&pdev->dev, &chg->charger);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(&pdev->dev, "failed: power supply register\n");
|
||||||
|
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 = {
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.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 <k.kozlowski@samsung.com>");
|
||||||
|
MODULE_DESCRIPTION("Maxim 77693 charger driver");
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
Loading…
Reference in New Issue
Block a user