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/* SPDX-License-Identifier: GPL-2.0-only / / * Copyright (C) 2011 Samsung Electronics Co., Ltd. * MyungJoo.Ham <myungjoo.ham@samsung.com> * * Charger Manager. * This framework enables to control and multiple chargers and to * monitor charging even in the context of suspend-to-RAM with * an interface combining the chargers. * / #ifndef _CHARGER_MANAGER_H #define _CHARGER_MANAGER_H #include <linux/power_supply.h> #include <linux/extcon.h> #include <linux/alarmtimer.h> enum data_source { CM_BATTERY_PRESENT, CM_NO_BATTERY, CM_FUEL_GAUGE, CM_CHARGER_STAT, }; enum polling_modes { CM_POLL_DISABLE = 0, CM_POLL_ALWAYS, CM_POLL_EXTERNAL_POWER_ONLY, CM_POLL_CHARGING_ONLY, }; enum cm_event_types { CM_EVENT_UNKNOWN = 0, CM_EVENT_BATT_FULL, CM_EVENT_BATT_IN, CM_EVENT_BATT_OUT, CM_EVENT_BATT_OVERHEAT, CM_EVENT_BATT_COLD, CM_EVENT_EXT_PWR_IN_OUT, CM_EVENT_CHG_START_STOP, CM_EVENT_OTHERS, }; / * struct charger_cable * @extcon_name: the name of extcon device. * @name: the name of charger cable(external connector). * @extcon_dev: the extcon device. * @wq: the workqueue to control charger according to the state of * charger cable. If charger cable is attached, enable charger. * But if charger cable is detached, disable charger. * @nb: the notifier block to receive changed state from EXTCON * (External Connector) when charger cable is attached/detached. * @attached: the state of charger cable. * true: the charger cable is attached * false: the charger cable is detached * @charger: the instance of struct charger_regulator. * @cm: the Charger Manager representing the battery. / struct charger_cable { const char extcon_name; const char name; / The charger-manager use Extcon framework / struct extcon_specific_cable_nb extcon_dev; struct work_struct wq; struct notifier_block nb; / The state of charger cable / bool attached; struct charger_regulator charger; /* * Set min/max current of regulator to protect over-current issue * according to a kind of charger cable when cable is attached. / int min_uA; int max_uA; struct charger_manager cm; }; /** * struct charger_regulator * @regulator_name: the name of regulator for using charger. * @consumer: the regulator consumer for the charger. * @externally_control: * Set if the charger-manager cannot control charger, * the charger will be maintained with disabled state. * @cables: * the array of charger cables to enable/disable charger * and set current limit according to constraint data of * struct charger_cable if only charger cable included * in the array of charger cables is attached/detached. * @num_cables: the number of charger cables. * @attr_g: Attribute group for the charger(regulator) * @attr_name: "name" sysfs entry * @attr_state: "state" sysfs entry * @attr_externally_control: "externally_control" sysfs entry * @attrs: Arrays pointing to attr_name/state/externally_control for attr_g / struct charger_regulator { / The name of regulator for charging / const char regulator_name; struct regulator consumer; / charger never on when system is on / int externally_control; / * Store constraint information related to current limit, * each cable have different condition for charging. / struct charger_cable cables; int num_cables; struct attribute_group attr_grp; struct device_attribute attr_name; struct device_attribute attr_state; struct device_attribute attr_externally_control; struct attribute attrs[4]; struct charger_manager cm; }; /** * struct charger_desc * @psy_name: the name of power-supply-class for charger manager * @polling_mode: * Determine which polling mode will be used * @fullbatt_vchkdrop_ms: * @fullbatt_vchkdrop_uV: * Check voltage drop after the battery is fully charged. * If it has dropped more than fullbatt_vchkdrop_uV after * fullbatt_vchkdrop_ms, CM will restart charging. * @fullbatt_uV: voltage in microvolt * If VBATT >= fullbatt_uV, it is assumed to be full. * @fullbatt_soc: state of Charge in % * If state of Charge >= fullbatt_soc, it is assumed to be full. * @fullbatt_full_capacity: full capacity measure * If full capacity of battery >= fullbatt_full_capacity, * it is assumed to be full. * @polling_interval_ms: interval in millisecond at which * charger manager will monitor battery health * @battery_present: * Specify where information for existence of battery can be obtained * @psy_charger_stat: the names of power-supply for chargers * @num_charger_regulator: the number of entries in charger_regulators * @charger_regulators: array of charger regulators * @psy_fuel_gauge: the name of power-supply for fuel gauge * @thermal_zone : the name of thermal zone for battery * @temp_min : Minimum battery temperature for charging. * @temp_max : Maximum battery temperature for charging. * @temp_diff : Temperature difference to restart charging. * @measure_battery_temp: * true: measure battery temperature * false: measure ambient temperature * @charging_max_duration_ms: Maximum possible duration for charging * If whole charging duration exceed 'charging_max_duration_ms', * cm stop charging. * @discharging_max_duration_ms: * Maximum possible duration for discharging with charger cable * after full-batt. If discharging duration exceed 'discharging * max_duration_ms', cm start charging. / struct charger_desc { const char psy_name; enum polling_modes polling_mode; unsigned int polling_interval_ms; unsigned int fullbatt_vchkdrop_ms; unsigned int fullbatt_vchkdrop_uV; unsigned int fullbatt_uV; unsigned int fullbatt_soc; unsigned int fullbatt_full_capacity; enum data_source battery_present; const char *psy_charger_stat; int num_charger_regulators; struct charger_regulator charger_regulators; const struct attribute_group *sysfs_groups; const char psy_fuel_gauge; const char thermal_zone; int temp_min; int temp_max; int temp_diff; bool measure_battery_temp; u32 charging_max_duration_ms; u32 discharging_max_duration_ms; }; #define PSY_NAME_MAX 30 /* * struct charger_manager * @entry: entry for list * @dev: device pointer * @desc: instance of charger_desc * @fuel_gauge: power_supply for fuel gauge * @charger_stat: array of power_supply for chargers * @tzd_batt : thermal zone device for battery * @charger_enabled: the state of charger * @fullbatt_vchk_jiffies_at: * jiffies at the time full battery check will occur. * @fullbatt_vchk_work: work queue for full battery check * @emergency_stop: * When setting true, stop charging * @psy_name_buf: the name of power-supply-class for charger manager * @charger_psy: power_supply for charger manager * @status_save_ext_pwr_inserted: * saved status of external power before entering suspend-to-RAM * @status_save_batt: * saved status of battery before entering suspend-to-RAM * @charging_start_time: saved start time of enabling charging * @charging_end_time: saved end time of disabling charging / struct charger_manager { struct list_head entry; struct device dev; struct charger_desc desc; #ifdef CONFIG_THERMAL struct thermal_zone_device tzd_batt; #endif bool charger_enabled; unsigned long fullbatt_vchk_jiffies_at; struct delayed_work fullbatt_vchk_work; int emergency_stop; char psy_name_buf[PSY_NAME_MAX + 1]; struct power_supply_desc charger_psy_desc; struct power_supply charger_psy; u64 charging_start_time; u64 charging_end_time; }; #ifdef CONFIG_CHARGER_MANAGER extern void cm_notify_event(struct power_supply psy, enum cm_event_types type, char msg); #else static inline void cm_notify_event(struct power_supply psy, enum cm_event_types type, char msg) { } #endif #endif / _CHARGER_MANAGER_H */

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