1c5b64a99SLinus Walleij // SPDX-License-Identifier: GPL-2.0-only 2c5b64a99SLinus Walleij /* 3c5b64a99SLinus Walleij * Copyright (C) ST-Ericsson SA 2012 4c5b64a99SLinus Walleij * Copyright (c) 2012 Sony Mobile Communications AB 5c5b64a99SLinus Walleij * 6c5b64a99SLinus Walleij * Charging algorithm driver for AB8500 7c5b64a99SLinus Walleij * 8c5b64a99SLinus Walleij * Authors: 9c5b64a99SLinus Walleij * Johan Palsson <johan.palsson@stericsson.com> 10c5b64a99SLinus Walleij * Karl Komierowski <karl.komierowski@stericsson.com> 11c5b64a99SLinus Walleij * Arun R Murthy <arun.murthy@stericsson.com> 12c5b64a99SLinus Walleij * Author: Imre Sunyi <imre.sunyi@sonymobile.com> 13c5b64a99SLinus Walleij */ 14c5b64a99SLinus Walleij 15c5b64a99SLinus Walleij #include <linux/init.h> 16c5b64a99SLinus Walleij #include <linux/module.h> 17c5b64a99SLinus Walleij #include <linux/device.h> 18c5b64a99SLinus Walleij #include <linux/component.h> 19c5b64a99SLinus Walleij #include <linux/hrtimer.h> 20c5b64a99SLinus Walleij #include <linux/interrupt.h> 21c5b64a99SLinus Walleij #include <linux/delay.h> 22c5b64a99SLinus Walleij #include <linux/slab.h> 23c5b64a99SLinus Walleij #include <linux/platform_device.h> 24c5b64a99SLinus Walleij #include <linux/power_supply.h> 25c5b64a99SLinus Walleij #include <linux/completion.h> 26c5b64a99SLinus Walleij #include <linux/workqueue.h> 27c5b64a99SLinus Walleij #include <linux/kobject.h> 28c5b64a99SLinus Walleij #include <linux/of.h> 29c5b64a99SLinus Walleij #include <linux/mfd/core.h> 30c5b64a99SLinus Walleij #include <linux/mfd/abx500.h> 31c5b64a99SLinus Walleij #include <linux/mfd/abx500/ab8500.h> 32c5b64a99SLinus Walleij #include <linux/notifier.h> 33c5b64a99SLinus Walleij 34c5b64a99SLinus Walleij #include "ab8500-bm.h" 35c5b64a99SLinus Walleij #include "ab8500-chargalg.h" 36c5b64a99SLinus Walleij 37c5b64a99SLinus Walleij /* Watchdog kick interval */ 38c5b64a99SLinus Walleij #define CHG_WD_INTERVAL (6 * HZ) 39c5b64a99SLinus Walleij 40c5b64a99SLinus Walleij /* End-of-charge criteria counter */ 41c5b64a99SLinus Walleij #define EOC_COND_CNT 10 42c5b64a99SLinus Walleij 43c5b64a99SLinus Walleij /* One hour expressed in seconds */ 44c5b64a99SLinus Walleij #define ONE_HOUR_IN_SECONDS 3600 45c5b64a99SLinus Walleij 46c5b64a99SLinus Walleij /* Five minutes expressed in seconds */ 47c5b64a99SLinus Walleij #define FIVE_MINUTES_IN_SECONDS 300 48c5b64a99SLinus Walleij 491091ed7dSLinus Walleij /* 501091ed7dSLinus Walleij * This is the battery capacity limit that will trigger a new 511091ed7dSLinus Walleij * full charging cycle in the case where maintenance charging 521091ed7dSLinus Walleij * has been disabled 531091ed7dSLinus Walleij */ 541091ed7dSLinus Walleij #define AB8500_RECHARGE_CAP 95 551091ed7dSLinus Walleij 56c5b64a99SLinus Walleij enum ab8500_chargers { 57c5b64a99SLinus Walleij NO_CHG, 58c5b64a99SLinus Walleij AC_CHG, 59c5b64a99SLinus Walleij USB_CHG, 60c5b64a99SLinus Walleij }; 61c5b64a99SLinus Walleij 62c5b64a99SLinus Walleij struct ab8500_chargalg_charger_info { 63c5b64a99SLinus Walleij enum ab8500_chargers conn_chg; 64c5b64a99SLinus Walleij enum ab8500_chargers prev_conn_chg; 65c5b64a99SLinus Walleij enum ab8500_chargers online_chg; 66c5b64a99SLinus Walleij enum ab8500_chargers prev_online_chg; 67c5b64a99SLinus Walleij enum ab8500_chargers charger_type; 68c5b64a99SLinus Walleij bool usb_chg_ok; 69c5b64a99SLinus Walleij bool ac_chg_ok; 70bc6e0287SLinus Walleij int usb_volt_uv; 7183e5aa77SLinus Walleij int usb_curr_ua; 72bc6e0287SLinus Walleij int ac_volt_uv; 7383e5aa77SLinus Walleij int ac_curr_ua; 74bc6e0287SLinus Walleij int usb_vset_uv; 7583e5aa77SLinus Walleij int usb_iset_ua; 76bc6e0287SLinus Walleij int ac_vset_uv; 7783e5aa77SLinus Walleij int ac_iset_ua; 78c5b64a99SLinus Walleij }; 79c5b64a99SLinus Walleij 80c5b64a99SLinus Walleij struct ab8500_chargalg_battery_data { 81c5b64a99SLinus Walleij int temp; 822a5f4183SLinus Walleij int volt_uv; 839c20899dSLinus Walleij int avg_curr_ua; 8483e5aa77SLinus Walleij int inst_curr_ua; 85c5b64a99SLinus Walleij int percent; 86c5b64a99SLinus Walleij }; 87c5b64a99SLinus Walleij 88c5b64a99SLinus Walleij enum ab8500_chargalg_states { 89c5b64a99SLinus Walleij STATE_HANDHELD_INIT, 90c5b64a99SLinus Walleij STATE_HANDHELD, 91c5b64a99SLinus Walleij STATE_CHG_NOT_OK_INIT, 92c5b64a99SLinus Walleij STATE_CHG_NOT_OK, 93c5b64a99SLinus Walleij STATE_HW_TEMP_PROTECT_INIT, 94c5b64a99SLinus Walleij STATE_HW_TEMP_PROTECT, 95c5b64a99SLinus Walleij STATE_NORMAL_INIT, 96c5b64a99SLinus Walleij STATE_NORMAL, 97c5b64a99SLinus Walleij STATE_WAIT_FOR_RECHARGE_INIT, 98c5b64a99SLinus Walleij STATE_WAIT_FOR_RECHARGE, 99c5b64a99SLinus Walleij STATE_MAINTENANCE_A_INIT, 100c5b64a99SLinus Walleij STATE_MAINTENANCE_A, 101c5b64a99SLinus Walleij STATE_MAINTENANCE_B_INIT, 102c5b64a99SLinus Walleij STATE_MAINTENANCE_B, 103c5b64a99SLinus Walleij STATE_TEMP_UNDEROVER_INIT, 104c5b64a99SLinus Walleij STATE_TEMP_UNDEROVER, 105c5b64a99SLinus Walleij STATE_TEMP_LOWHIGH_INIT, 106c5b64a99SLinus Walleij STATE_TEMP_LOWHIGH, 107c5b64a99SLinus Walleij STATE_OVV_PROTECT_INIT, 108c5b64a99SLinus Walleij STATE_OVV_PROTECT, 109c5b64a99SLinus Walleij STATE_SAFETY_TIMER_EXPIRED_INIT, 110c5b64a99SLinus Walleij STATE_SAFETY_TIMER_EXPIRED, 111c5b64a99SLinus Walleij STATE_BATT_REMOVED_INIT, 112c5b64a99SLinus Walleij STATE_BATT_REMOVED, 113c5b64a99SLinus Walleij STATE_WD_EXPIRED_INIT, 114c5b64a99SLinus Walleij STATE_WD_EXPIRED, 115c5b64a99SLinus Walleij }; 116c5b64a99SLinus Walleij 11738334231SColin Ian King static const char * const states[] = { 118c5b64a99SLinus Walleij "HANDHELD_INIT", 119c5b64a99SLinus Walleij "HANDHELD", 120c5b64a99SLinus Walleij "CHG_NOT_OK_INIT", 121c5b64a99SLinus Walleij "CHG_NOT_OK", 122c5b64a99SLinus Walleij "HW_TEMP_PROTECT_INIT", 123c5b64a99SLinus Walleij "HW_TEMP_PROTECT", 124c5b64a99SLinus Walleij "NORMAL_INIT", 125c5b64a99SLinus Walleij "NORMAL", 126c5b64a99SLinus Walleij "WAIT_FOR_RECHARGE_INIT", 127c5b64a99SLinus Walleij "WAIT_FOR_RECHARGE", 128c5b64a99SLinus Walleij "MAINTENANCE_A_INIT", 129c5b64a99SLinus Walleij "MAINTENANCE_A", 130c5b64a99SLinus Walleij "MAINTENANCE_B_INIT", 131c5b64a99SLinus Walleij "MAINTENANCE_B", 132c5b64a99SLinus Walleij "TEMP_UNDEROVER_INIT", 133c5b64a99SLinus Walleij "TEMP_UNDEROVER", 134c5b64a99SLinus Walleij "TEMP_LOWHIGH_INIT", 135c5b64a99SLinus Walleij "TEMP_LOWHIGH", 136c5b64a99SLinus Walleij "OVV_PROTECT_INIT", 137c5b64a99SLinus Walleij "OVV_PROTECT", 138c5b64a99SLinus Walleij "SAFETY_TIMER_EXPIRED_INIT", 139c5b64a99SLinus Walleij "SAFETY_TIMER_EXPIRED", 140c5b64a99SLinus Walleij "BATT_REMOVED_INIT", 141c5b64a99SLinus Walleij "BATT_REMOVED", 142c5b64a99SLinus Walleij "WD_EXPIRED_INIT", 143c5b64a99SLinus Walleij "WD_EXPIRED", 144c5b64a99SLinus Walleij }; 145c5b64a99SLinus Walleij 146c5b64a99SLinus Walleij struct ab8500_chargalg_events { 147c5b64a99SLinus Walleij bool batt_unknown; 148c5b64a99SLinus Walleij bool mainextchnotok; 149c5b64a99SLinus Walleij bool batt_ovv; 150c5b64a99SLinus Walleij bool batt_rem; 151c5b64a99SLinus Walleij bool btemp_underover; 1520e8b903bSLinus Walleij bool btemp_low; 1530e8b903bSLinus Walleij bool btemp_high; 154c5b64a99SLinus Walleij bool main_thermal_prot; 155c5b64a99SLinus Walleij bool usb_thermal_prot; 156c5b64a99SLinus Walleij bool main_ovv; 157c5b64a99SLinus Walleij bool vbus_ovv; 158c5b64a99SLinus Walleij bool usbchargernotok; 159c5b64a99SLinus Walleij bool safety_timer_expired; 160c5b64a99SLinus Walleij bool maintenance_timer_expired; 161c5b64a99SLinus Walleij bool ac_wd_expired; 162c5b64a99SLinus Walleij bool usb_wd_expired; 163c5b64a99SLinus Walleij bool ac_cv_active; 164c5b64a99SLinus Walleij bool usb_cv_active; 165c5b64a99SLinus Walleij bool vbus_collapsed; 166c5b64a99SLinus Walleij }; 167c5b64a99SLinus Walleij 168c5b64a99SLinus Walleij /** 169c5b64a99SLinus Walleij * struct ab8500_charge_curr_maximization - Charger maximization parameters 17083e5aa77SLinus Walleij * @original_iset_ua: the non optimized/maximised charger current 17183e5aa77SLinus Walleij * @current_iset_ua: the charging current used at this moment 172c5b64a99SLinus Walleij * @condition_cnt: number of iterations needed before a new charger current 173c5b64a99SLinus Walleij is set 17483e5aa77SLinus Walleij * @max_current_ua: maximum charger current 175c5b64a99SLinus Walleij * @wait_cnt: to avoid too fast current step down in case of charger 176c5b64a99SLinus Walleij * voltage collapse, we insert this delay between step 177c5b64a99SLinus Walleij * down 178c5b64a99SLinus Walleij * @level: tells in how many steps the charging current has been 179c5b64a99SLinus Walleij increased 180c5b64a99SLinus Walleij */ 181c5b64a99SLinus Walleij struct ab8500_charge_curr_maximization { 18283e5aa77SLinus Walleij int original_iset_ua; 18383e5aa77SLinus Walleij int current_iset_ua; 184c5b64a99SLinus Walleij int condition_cnt; 18583e5aa77SLinus Walleij int max_current_ua; 186c5b64a99SLinus Walleij int wait_cnt; 187c5b64a99SLinus Walleij u8 level; 188c5b64a99SLinus Walleij }; 189c5b64a99SLinus Walleij 190c5b64a99SLinus Walleij enum maxim_ret { 191c5b64a99SLinus Walleij MAXIM_RET_NOACTION, 192c5b64a99SLinus Walleij MAXIM_RET_CHANGE, 193c5b64a99SLinus Walleij MAXIM_RET_IBAT_TOO_HIGH, 194c5b64a99SLinus Walleij }; 195c5b64a99SLinus Walleij 196c5b64a99SLinus Walleij /** 197c5b64a99SLinus Walleij * struct ab8500_chargalg - ab8500 Charging algorithm device information 198c5b64a99SLinus Walleij * @dev: pointer to the structure device 199c5b64a99SLinus Walleij * @charge_status: battery operating status 200c5b64a99SLinus Walleij * @eoc_cnt: counter used to determine end-of_charge 201c5b64a99SLinus Walleij * @maintenance_chg: indicate if maintenance charge is active 202c5b64a99SLinus Walleij * @t_hyst_norm temperature hysteresis when the temperature has been 203c5b64a99SLinus Walleij * over or under normal limits 204c5b64a99SLinus Walleij * @t_hyst_lowhigh temperature hysteresis when the temperature has been 205c5b64a99SLinus Walleij * over or under the high or low limits 206c5b64a99SLinus Walleij * @charge_state: current state of the charging algorithm 207c5b64a99SLinus Walleij * @ccm charging current maximization parameters 208c5b64a99SLinus Walleij * @chg_info: information about connected charger types 209c5b64a99SLinus Walleij * @batt_data: data of the battery 210c5b64a99SLinus Walleij * @bm: Platform specific battery management information 211c5b64a99SLinus Walleij * @parent: pointer to the struct ab8500 212c5b64a99SLinus Walleij * @chargalg_psy: structure that holds the battery properties exposed by 213c5b64a99SLinus Walleij * the charging algorithm 214c5b64a99SLinus Walleij * @events: structure for information about events triggered 215c5b64a99SLinus Walleij * @chargalg_wq: work queue for running the charging algorithm 216c5b64a99SLinus Walleij * @chargalg_periodic_work: work to run the charging algorithm periodically 217c5b64a99SLinus Walleij * @chargalg_wd_work: work to kick the charger watchdog periodically 218c5b64a99SLinus Walleij * @chargalg_work: work to run the charging algorithm instantly 219c5b64a99SLinus Walleij * @safety_timer: charging safety timer 220c5b64a99SLinus Walleij * @maintenance_timer: maintenance charging timer 221c5b64a99SLinus Walleij * @chargalg_kobject: structure of type kobject 222c5b64a99SLinus Walleij */ 223c5b64a99SLinus Walleij struct ab8500_chargalg { 224c5b64a99SLinus Walleij struct device *dev; 225c5b64a99SLinus Walleij int charge_status; 226c5b64a99SLinus Walleij int eoc_cnt; 227c5b64a99SLinus Walleij bool maintenance_chg; 228c5b64a99SLinus Walleij int t_hyst_norm; 229c5b64a99SLinus Walleij int t_hyst_lowhigh; 230c5b64a99SLinus Walleij enum ab8500_chargalg_states charge_state; 231c5b64a99SLinus Walleij struct ab8500_charge_curr_maximization ccm; 232c5b64a99SLinus Walleij struct ab8500_chargalg_charger_info chg_info; 233c5b64a99SLinus Walleij struct ab8500_chargalg_battery_data batt_data; 234c5b64a99SLinus Walleij struct ab8500 *parent; 235484a9cc3SLinus Walleij struct ab8500_bm_data *bm; 236c5b64a99SLinus Walleij struct power_supply *chargalg_psy; 237c5b64a99SLinus Walleij struct ux500_charger *ac_chg; 238c5b64a99SLinus Walleij struct ux500_charger *usb_chg; 239c5b64a99SLinus Walleij struct ab8500_chargalg_events events; 240c5b64a99SLinus Walleij struct workqueue_struct *chargalg_wq; 241c5b64a99SLinus Walleij struct delayed_work chargalg_periodic_work; 242c5b64a99SLinus Walleij struct delayed_work chargalg_wd_work; 243c5b64a99SLinus Walleij struct work_struct chargalg_work; 244c5b64a99SLinus Walleij struct hrtimer safety_timer; 245c5b64a99SLinus Walleij struct hrtimer maintenance_timer; 246c5b64a99SLinus Walleij struct kobject chargalg_kobject; 247c5b64a99SLinus Walleij }; 248c5b64a99SLinus Walleij 249c5b64a99SLinus Walleij /*External charger prepare notifier*/ 250c5b64a99SLinus Walleij BLOCKING_NOTIFIER_HEAD(charger_notifier_list); 251c5b64a99SLinus Walleij 252c5b64a99SLinus Walleij /* Main battery properties */ 253c5b64a99SLinus Walleij static enum power_supply_property ab8500_chargalg_props[] = { 254c5b64a99SLinus Walleij POWER_SUPPLY_PROP_STATUS, 255c5b64a99SLinus Walleij POWER_SUPPLY_PROP_HEALTH, 256c5b64a99SLinus Walleij }; 257c5b64a99SLinus Walleij 258c5b64a99SLinus Walleij struct ab8500_chargalg_sysfs_entry { 259c5b64a99SLinus Walleij struct attribute attr; 26038334231SColin Ian King ssize_t (*show)(struct ab8500_chargalg *di, char *buf); 26138334231SColin Ian King ssize_t (*store)(struct ab8500_chargalg *di, const char *buf, size_t length); 262c5b64a99SLinus Walleij }; 263c5b64a99SLinus Walleij 264c5b64a99SLinus Walleij /** 265c5b64a99SLinus Walleij * ab8500_chargalg_safety_timer_expired() - Expiration of the safety timer 266c5b64a99SLinus Walleij * @timer: pointer to the hrtimer structure 267c5b64a99SLinus Walleij * 268c5b64a99SLinus Walleij * This function gets called when the safety timer for the charger 269c5b64a99SLinus Walleij * expires 270c5b64a99SLinus Walleij */ 271c5b64a99SLinus Walleij static enum hrtimer_restart 272c5b64a99SLinus Walleij ab8500_chargalg_safety_timer_expired(struct hrtimer *timer) 273c5b64a99SLinus Walleij { 274c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(timer, struct ab8500_chargalg, 275c5b64a99SLinus Walleij safety_timer); 276c5b64a99SLinus Walleij dev_err(di->dev, "Safety timer expired\n"); 277c5b64a99SLinus Walleij di->events.safety_timer_expired = true; 278c5b64a99SLinus Walleij 279c5b64a99SLinus Walleij /* Trigger execution of the algorithm instantly */ 280c5b64a99SLinus Walleij queue_work(di->chargalg_wq, &di->chargalg_work); 281c5b64a99SLinus Walleij 282c5b64a99SLinus Walleij return HRTIMER_NORESTART; 283c5b64a99SLinus Walleij } 284c5b64a99SLinus Walleij 285c5b64a99SLinus Walleij /** 286c5b64a99SLinus Walleij * ab8500_chargalg_maintenance_timer_expired() - Expiration of 287c5b64a99SLinus Walleij * the maintenance timer 288c5b64a99SLinus Walleij * @timer: pointer to the timer structure 289c5b64a99SLinus Walleij * 290*8652b62eSColin Ian King * This function gets called when the maintenance timer 291c5b64a99SLinus Walleij * expires 292c5b64a99SLinus Walleij */ 293c5b64a99SLinus Walleij static enum hrtimer_restart 294c5b64a99SLinus Walleij ab8500_chargalg_maintenance_timer_expired(struct hrtimer *timer) 295c5b64a99SLinus Walleij { 296c5b64a99SLinus Walleij 297c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(timer, struct ab8500_chargalg, 298c5b64a99SLinus Walleij maintenance_timer); 299c5b64a99SLinus Walleij 300c5b64a99SLinus Walleij dev_dbg(di->dev, "Maintenance timer expired\n"); 301c5b64a99SLinus Walleij di->events.maintenance_timer_expired = true; 302c5b64a99SLinus Walleij 303c5b64a99SLinus Walleij /* Trigger execution of the algorithm instantly */ 304c5b64a99SLinus Walleij queue_work(di->chargalg_wq, &di->chargalg_work); 305c5b64a99SLinus Walleij 306c5b64a99SLinus Walleij return HRTIMER_NORESTART; 307c5b64a99SLinus Walleij } 308c5b64a99SLinus Walleij 309c5b64a99SLinus Walleij /** 310c5b64a99SLinus Walleij * ab8500_chargalg_state_to() - Change charge state 311c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 312c5b64a99SLinus Walleij * 313c5b64a99SLinus Walleij * This function gets called when a charge state change should occur 314c5b64a99SLinus Walleij */ 315c5b64a99SLinus Walleij static void ab8500_chargalg_state_to(struct ab8500_chargalg *di, 316c5b64a99SLinus Walleij enum ab8500_chargalg_states state) 317c5b64a99SLinus Walleij { 318c5b64a99SLinus Walleij dev_dbg(di->dev, 319c5b64a99SLinus Walleij "State changed: %s (From state: [%d] %s =to=> [%d] %s )\n", 320c5b64a99SLinus Walleij di->charge_state == state ? "NO" : "YES", 321c5b64a99SLinus Walleij di->charge_state, 322c5b64a99SLinus Walleij states[di->charge_state], 323c5b64a99SLinus Walleij state, 324c5b64a99SLinus Walleij states[state]); 325c5b64a99SLinus Walleij 326c5b64a99SLinus Walleij di->charge_state = state; 327c5b64a99SLinus Walleij } 328c5b64a99SLinus Walleij 329c5b64a99SLinus Walleij static int ab8500_chargalg_check_charger_enable(struct ab8500_chargalg *di) 330c5b64a99SLinus Walleij { 33125fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 33283e5aa77SLinus Walleij 333c5b64a99SLinus Walleij switch (di->charge_state) { 334c5b64a99SLinus Walleij case STATE_NORMAL: 335c5b64a99SLinus Walleij case STATE_MAINTENANCE_A: 336c5b64a99SLinus Walleij case STATE_MAINTENANCE_B: 337c5b64a99SLinus Walleij break; 338c5b64a99SLinus Walleij default: 339c5b64a99SLinus Walleij return 0; 340c5b64a99SLinus Walleij } 341c5b64a99SLinus Walleij 342c5b64a99SLinus Walleij if (di->chg_info.charger_type & USB_CHG) { 343c5b64a99SLinus Walleij return di->usb_chg->ops.check_enable(di->usb_chg, 344bc6e0287SLinus Walleij bi->constant_charge_voltage_max_uv, 34583e5aa77SLinus Walleij bi->constant_charge_current_max_ua); 346c5b64a99SLinus Walleij } else if ((di->chg_info.charger_type & AC_CHG) && 347c5b64a99SLinus Walleij !(di->ac_chg->external)) { 348c5b64a99SLinus Walleij return di->ac_chg->ops.check_enable(di->ac_chg, 349bc6e0287SLinus Walleij bi->constant_charge_voltage_max_uv, 35083e5aa77SLinus Walleij bi->constant_charge_current_max_ua); 351c5b64a99SLinus Walleij } 352c5b64a99SLinus Walleij return 0; 353c5b64a99SLinus Walleij } 354c5b64a99SLinus Walleij 355c5b64a99SLinus Walleij /** 356c5b64a99SLinus Walleij * ab8500_chargalg_check_charger_connection() - Check charger connection change 357c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 358c5b64a99SLinus Walleij * 359c5b64a99SLinus Walleij * This function will check if there is a change in the charger connection 360c5b64a99SLinus Walleij * and change charge state accordingly. AC has precedence over USB. 361c5b64a99SLinus Walleij */ 362c5b64a99SLinus Walleij static int ab8500_chargalg_check_charger_connection(struct ab8500_chargalg *di) 363c5b64a99SLinus Walleij { 36475ee3f6fSLinus Walleij if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg) { 36575ee3f6fSLinus Walleij /* Charger state changed since last update */ 36675ee3f6fSLinus Walleij if (di->chg_info.conn_chg & AC_CHG) { 36775ee3f6fSLinus Walleij dev_info(di->dev, "Charging source is AC\n"); 368c5b64a99SLinus Walleij if (di->chg_info.charger_type != AC_CHG) { 369c5b64a99SLinus Walleij di->chg_info.charger_type = AC_CHG; 370c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 371c5b64a99SLinus Walleij } 37275ee3f6fSLinus Walleij } else if (di->chg_info.conn_chg & USB_CHG) { 37375ee3f6fSLinus Walleij dev_info(di->dev, "Charging source is USB\n"); 374c5b64a99SLinus Walleij di->chg_info.charger_type = USB_CHG; 375c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 376c5b64a99SLinus Walleij } else { 377c5b64a99SLinus Walleij dev_dbg(di->dev, "Charging source is OFF\n"); 378c5b64a99SLinus Walleij di->chg_info.charger_type = NO_CHG; 379c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_HANDHELD_INIT); 380c5b64a99SLinus Walleij } 381c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = di->chg_info.conn_chg; 382c5b64a99SLinus Walleij } 383c5b64a99SLinus Walleij return di->chg_info.conn_chg; 384c5b64a99SLinus Walleij } 385c5b64a99SLinus Walleij 386c5b64a99SLinus Walleij /** 387c5b64a99SLinus Walleij * ab8500_chargalg_start_safety_timer() - Start charging safety timer 388c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 389c5b64a99SLinus Walleij * 390c5b64a99SLinus Walleij * The safety timer is used to avoid overcharging of old or bad batteries. 391c5b64a99SLinus Walleij * There are different timers for AC and USB 392c5b64a99SLinus Walleij */ 393c5b64a99SLinus Walleij static void ab8500_chargalg_start_safety_timer(struct ab8500_chargalg *di) 394c5b64a99SLinus Walleij { 395c5b64a99SLinus Walleij /* Charger-dependent expiration time in hours*/ 396c5b64a99SLinus Walleij int timer_expiration = 0; 397c5b64a99SLinus Walleij 398c5b64a99SLinus Walleij switch (di->chg_info.charger_type) { 399c5b64a99SLinus Walleij case AC_CHG: 400c5b64a99SLinus Walleij timer_expiration = di->bm->main_safety_tmr_h; 401c5b64a99SLinus Walleij break; 402c5b64a99SLinus Walleij 403c5b64a99SLinus Walleij case USB_CHG: 404c5b64a99SLinus Walleij timer_expiration = di->bm->usb_safety_tmr_h; 405c5b64a99SLinus Walleij break; 406c5b64a99SLinus Walleij 407c5b64a99SLinus Walleij default: 408c5b64a99SLinus Walleij dev_err(di->dev, "Unknown charger to charge from\n"); 409c5b64a99SLinus Walleij break; 410c5b64a99SLinus Walleij } 411c5b64a99SLinus Walleij 412c5b64a99SLinus Walleij di->events.safety_timer_expired = false; 413c5b64a99SLinus Walleij hrtimer_set_expires_range(&di->safety_timer, 414c5b64a99SLinus Walleij ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0), 415c5b64a99SLinus Walleij ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); 416c5b64a99SLinus Walleij hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL); 417c5b64a99SLinus Walleij } 418c5b64a99SLinus Walleij 419c5b64a99SLinus Walleij /** 420c5b64a99SLinus Walleij * ab8500_chargalg_stop_safety_timer() - Stop charging safety timer 421c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 422c5b64a99SLinus Walleij * 423c5b64a99SLinus Walleij * The safety timer is stopped whenever the NORMAL state is exited 424c5b64a99SLinus Walleij */ 425c5b64a99SLinus Walleij static void ab8500_chargalg_stop_safety_timer(struct ab8500_chargalg *di) 426c5b64a99SLinus Walleij { 427c5b64a99SLinus Walleij if (hrtimer_try_to_cancel(&di->safety_timer) >= 0) 428c5b64a99SLinus Walleij di->events.safety_timer_expired = false; 429c5b64a99SLinus Walleij } 430c5b64a99SLinus Walleij 431c5b64a99SLinus Walleij /** 432c5b64a99SLinus Walleij * ab8500_chargalg_start_maintenance_timer() - Start charging maintenance timer 433c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 434*8652b62eSColin Ian King * @duration: duration of the maintenance timer in minutes 435c5b64a99SLinus Walleij * 436c5b64a99SLinus Walleij * The maintenance timer is used to maintain the charge in the battery once 437c5b64a99SLinus Walleij * the battery is considered full. These timers are chosen to match the 438c5b64a99SLinus Walleij * discharge curve of the battery 439c5b64a99SLinus Walleij */ 440c5b64a99SLinus Walleij static void ab8500_chargalg_start_maintenance_timer(struct ab8500_chargalg *di, 441c5b64a99SLinus Walleij int duration) 442c5b64a99SLinus Walleij { 443d72ce7d3SLinus Walleij /* Set a timer in minutes with a 30 second range */ 444c5b64a99SLinus Walleij hrtimer_set_expires_range(&di->maintenance_timer, 445d72ce7d3SLinus Walleij ktime_set(duration * 60, 0), 446d72ce7d3SLinus Walleij ktime_set(30, 0)); 447c5b64a99SLinus Walleij di->events.maintenance_timer_expired = false; 448c5b64a99SLinus Walleij hrtimer_start_expires(&di->maintenance_timer, HRTIMER_MODE_REL); 449c5b64a99SLinus Walleij } 450c5b64a99SLinus Walleij 451c5b64a99SLinus Walleij /** 452c5b64a99SLinus Walleij * ab8500_chargalg_stop_maintenance_timer() - Stop maintenance timer 453c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 454c5b64a99SLinus Walleij * 455c5b64a99SLinus Walleij * The maintenance timer is stopped whenever maintenance ends or when another 456c5b64a99SLinus Walleij * state is entered 457c5b64a99SLinus Walleij */ 458c5b64a99SLinus Walleij static void ab8500_chargalg_stop_maintenance_timer(struct ab8500_chargalg *di) 459c5b64a99SLinus Walleij { 460c5b64a99SLinus Walleij if (hrtimer_try_to_cancel(&di->maintenance_timer) >= 0) 461c5b64a99SLinus Walleij di->events.maintenance_timer_expired = false; 462c5b64a99SLinus Walleij } 463c5b64a99SLinus Walleij 464c5b64a99SLinus Walleij /** 465c5b64a99SLinus Walleij * ab8500_chargalg_kick_watchdog() - Kick charger watchdog 466c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 467c5b64a99SLinus Walleij * 468c5b64a99SLinus Walleij * The charger watchdog have to be kicked periodically whenever the charger is 469c5b64a99SLinus Walleij * on, else the ABB will reset the system 470c5b64a99SLinus Walleij */ 471c5b64a99SLinus Walleij static int ab8500_chargalg_kick_watchdog(struct ab8500_chargalg *di) 472c5b64a99SLinus Walleij { 473c5b64a99SLinus Walleij /* Check if charger exists and kick watchdog if charging */ 474c5b64a99SLinus Walleij if (di->ac_chg && di->ac_chg->ops.kick_wd && 475c5b64a99SLinus Walleij di->chg_info.online_chg & AC_CHG) { 476c5b64a99SLinus Walleij /* 477c5b64a99SLinus Walleij * If AB charger watchdog expired, pm2xxx charging 478c5b64a99SLinus Walleij * gets disabled. To be safe, kick both AB charger watchdog 479c5b64a99SLinus Walleij * and pm2xxx watchdog. 480c5b64a99SLinus Walleij */ 481c5b64a99SLinus Walleij if (di->ac_chg->external && 482c5b64a99SLinus Walleij di->usb_chg && di->usb_chg->ops.kick_wd) 483c5b64a99SLinus Walleij di->usb_chg->ops.kick_wd(di->usb_chg); 484c5b64a99SLinus Walleij 485c5b64a99SLinus Walleij return di->ac_chg->ops.kick_wd(di->ac_chg); 48638334231SColin Ian King } else if (di->usb_chg && di->usb_chg->ops.kick_wd && 487c5b64a99SLinus Walleij di->chg_info.online_chg & USB_CHG) 488c5b64a99SLinus Walleij return di->usb_chg->ops.kick_wd(di->usb_chg); 489c5b64a99SLinus Walleij 490c5b64a99SLinus Walleij return -ENXIO; 491c5b64a99SLinus Walleij } 492c5b64a99SLinus Walleij 493c5b64a99SLinus Walleij /** 494c5b64a99SLinus Walleij * ab8500_chargalg_ac_en() - Turn on/off the AC charger 495c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 496c5b64a99SLinus Walleij * @enable: charger on/off 497bc6e0287SLinus Walleij * @vset_uv: requested charger output voltage in microvolt 49883e5aa77SLinus Walleij * @iset_ua: requested charger output current in microampere 499c5b64a99SLinus Walleij * 500c5b64a99SLinus Walleij * The AC charger will be turned on/off with the requested charge voltage and 501c5b64a99SLinus Walleij * current 502c5b64a99SLinus Walleij */ 503c5b64a99SLinus Walleij static int ab8500_chargalg_ac_en(struct ab8500_chargalg *di, int enable, 504bc6e0287SLinus Walleij int vset_uv, int iset_ua) 505c5b64a99SLinus Walleij { 506c5b64a99SLinus Walleij static int ab8500_chargalg_ex_ac_enable_toggle; 507c5b64a99SLinus Walleij 508c5b64a99SLinus Walleij if (!di->ac_chg || !di->ac_chg->ops.enable) 509c5b64a99SLinus Walleij return -ENXIO; 510c5b64a99SLinus Walleij 511c5b64a99SLinus Walleij /* Select maximum of what both the charger and the battery supports */ 512bc6e0287SLinus Walleij if (di->ac_chg->max_out_volt_uv) 513bc6e0287SLinus Walleij vset_uv = min(vset_uv, di->ac_chg->max_out_volt_uv); 51483e5aa77SLinus Walleij if (di->ac_chg->max_out_curr_ua) 51583e5aa77SLinus Walleij iset_ua = min(iset_ua, di->ac_chg->max_out_curr_ua); 516c5b64a99SLinus Walleij 51783e5aa77SLinus Walleij di->chg_info.ac_iset_ua = iset_ua; 518bc6e0287SLinus Walleij di->chg_info.ac_vset_uv = vset_uv; 519c5b64a99SLinus Walleij 520c5b64a99SLinus Walleij /* Enable external charger */ 521c5b64a99SLinus Walleij if (enable && di->ac_chg->external && 522c5b64a99SLinus Walleij !ab8500_chargalg_ex_ac_enable_toggle) { 523c5b64a99SLinus Walleij blocking_notifier_call_chain(&charger_notifier_list, 524c5b64a99SLinus Walleij 0, di->dev); 525c5b64a99SLinus Walleij ab8500_chargalg_ex_ac_enable_toggle++; 526c5b64a99SLinus Walleij } 527c5b64a99SLinus Walleij 528bc6e0287SLinus Walleij return di->ac_chg->ops.enable(di->ac_chg, enable, vset_uv, iset_ua); 529c5b64a99SLinus Walleij } 530c5b64a99SLinus Walleij 531c5b64a99SLinus Walleij /** 532c5b64a99SLinus Walleij * ab8500_chargalg_usb_en() - Turn on/off the USB charger 533c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 534c5b64a99SLinus Walleij * @enable: charger on/off 535bc6e0287SLinus Walleij * @vset_uv: requested charger output voltage in microvolt 53683e5aa77SLinus Walleij * @iset_ua: requested charger output current in microampere 537c5b64a99SLinus Walleij * 538c5b64a99SLinus Walleij * The USB charger will be turned on/off with the requested charge voltage and 539c5b64a99SLinus Walleij * current 540c5b64a99SLinus Walleij */ 541c5b64a99SLinus Walleij static int ab8500_chargalg_usb_en(struct ab8500_chargalg *di, int enable, 542bc6e0287SLinus Walleij int vset_uv, int iset_ua) 543c5b64a99SLinus Walleij { 544c5b64a99SLinus Walleij if (!di->usb_chg || !di->usb_chg->ops.enable) 545c5b64a99SLinus Walleij return -ENXIO; 546c5b64a99SLinus Walleij 547c5b64a99SLinus Walleij /* Select maximum of what both the charger and the battery supports */ 548bc6e0287SLinus Walleij if (di->usb_chg->max_out_volt_uv) 549bc6e0287SLinus Walleij vset_uv = min(vset_uv, di->usb_chg->max_out_volt_uv); 55083e5aa77SLinus Walleij if (di->usb_chg->max_out_curr_ua) 55183e5aa77SLinus Walleij iset_ua = min(iset_ua, di->usb_chg->max_out_curr_ua); 552c5b64a99SLinus Walleij 55383e5aa77SLinus Walleij di->chg_info.usb_iset_ua = iset_ua; 554bc6e0287SLinus Walleij di->chg_info.usb_vset_uv = vset_uv; 555c5b64a99SLinus Walleij 556bc6e0287SLinus Walleij return di->usb_chg->ops.enable(di->usb_chg, enable, vset_uv, iset_ua); 557c5b64a99SLinus Walleij } 558c5b64a99SLinus Walleij 559c5b64a99SLinus Walleij /** 560c5b64a99SLinus Walleij * ab8500_chargalg_update_chg_curr() - Update charger current 561c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 56283e5aa77SLinus Walleij * @iset_ua: requested charger output current in microampere 563c5b64a99SLinus Walleij * 564c5b64a99SLinus Walleij * The charger output current will be updated for the charger 565c5b64a99SLinus Walleij * that is currently in use 566c5b64a99SLinus Walleij */ 567c5b64a99SLinus Walleij static int ab8500_chargalg_update_chg_curr(struct ab8500_chargalg *di, 56883e5aa77SLinus Walleij int iset_ua) 569c5b64a99SLinus Walleij { 570c5b64a99SLinus Walleij /* Check if charger exists and update current if charging */ 571c5b64a99SLinus Walleij if (di->ac_chg && di->ac_chg->ops.update_curr && 572c5b64a99SLinus Walleij di->chg_info.charger_type & AC_CHG) { 573c5b64a99SLinus Walleij /* 574c5b64a99SLinus Walleij * Select maximum of what both the charger 575c5b64a99SLinus Walleij * and the battery supports 576c5b64a99SLinus Walleij */ 57783e5aa77SLinus Walleij if (di->ac_chg->max_out_curr_ua) 57883e5aa77SLinus Walleij iset_ua = min(iset_ua, di->ac_chg->max_out_curr_ua); 579c5b64a99SLinus Walleij 58083e5aa77SLinus Walleij di->chg_info.ac_iset_ua = iset_ua; 581c5b64a99SLinus Walleij 58283e5aa77SLinus Walleij return di->ac_chg->ops.update_curr(di->ac_chg, iset_ua); 583c5b64a99SLinus Walleij } else if (di->usb_chg && di->usb_chg->ops.update_curr && 584c5b64a99SLinus Walleij di->chg_info.charger_type & USB_CHG) { 585c5b64a99SLinus Walleij /* 586c5b64a99SLinus Walleij * Select maximum of what both the charger 587c5b64a99SLinus Walleij * and the battery supports 588c5b64a99SLinus Walleij */ 58983e5aa77SLinus Walleij if (di->usb_chg->max_out_curr_ua) 59083e5aa77SLinus Walleij iset_ua = min(iset_ua, di->usb_chg->max_out_curr_ua); 591c5b64a99SLinus Walleij 59283e5aa77SLinus Walleij di->chg_info.usb_iset_ua = iset_ua; 593c5b64a99SLinus Walleij 59483e5aa77SLinus Walleij return di->usb_chg->ops.update_curr(di->usb_chg, iset_ua); 595c5b64a99SLinus Walleij } 596c5b64a99SLinus Walleij 597c5b64a99SLinus Walleij return -ENXIO; 598c5b64a99SLinus Walleij } 599c5b64a99SLinus Walleij 600c5b64a99SLinus Walleij /** 601c5b64a99SLinus Walleij * ab8500_chargalg_stop_charging() - Stop charging 602c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 603c5b64a99SLinus Walleij * 604c5b64a99SLinus Walleij * This function is called from any state where charging should be stopped. 605c5b64a99SLinus Walleij * All charging is disabled and all status parameters and timers are changed 606c5b64a99SLinus Walleij * accordingly 607c5b64a99SLinus Walleij */ 608c5b64a99SLinus Walleij static void ab8500_chargalg_stop_charging(struct ab8500_chargalg *di) 609c5b64a99SLinus Walleij { 610c5b64a99SLinus Walleij ab8500_chargalg_ac_en(di, false, 0, 0); 611c5b64a99SLinus Walleij ab8500_chargalg_usb_en(di, false, 0, 0); 612c5b64a99SLinus Walleij ab8500_chargalg_stop_safety_timer(di); 613c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 614c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 615c5b64a99SLinus Walleij di->maintenance_chg = false; 616c5b64a99SLinus Walleij cancel_delayed_work(&di->chargalg_wd_work); 617c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 618c5b64a99SLinus Walleij } 619c5b64a99SLinus Walleij 620c5b64a99SLinus Walleij /** 621c5b64a99SLinus Walleij * ab8500_chargalg_hold_charging() - Pauses charging 622c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 623c5b64a99SLinus Walleij * 624c5b64a99SLinus Walleij * This function is called in the case where maintenance charging has been 625c5b64a99SLinus Walleij * disabled and instead a battery voltage mode is entered to check when the 626c5b64a99SLinus Walleij * battery voltage has reached a certain recharge voltage 627c5b64a99SLinus Walleij */ 628c5b64a99SLinus Walleij static void ab8500_chargalg_hold_charging(struct ab8500_chargalg *di) 629c5b64a99SLinus Walleij { 630c5b64a99SLinus Walleij ab8500_chargalg_ac_en(di, false, 0, 0); 631c5b64a99SLinus Walleij ab8500_chargalg_usb_en(di, false, 0, 0); 632c5b64a99SLinus Walleij ab8500_chargalg_stop_safety_timer(di); 633c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 634c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 635c5b64a99SLinus Walleij di->maintenance_chg = false; 636c5b64a99SLinus Walleij cancel_delayed_work(&di->chargalg_wd_work); 637c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 638c5b64a99SLinus Walleij } 639c5b64a99SLinus Walleij 640c5b64a99SLinus Walleij /** 641c5b64a99SLinus Walleij * ab8500_chargalg_start_charging() - Start the charger 642c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 643bc6e0287SLinus Walleij * @vset_uv: requested charger output voltage in microvolt 64483e5aa77SLinus Walleij * @iset_ua: requested charger output current in microampere 645c5b64a99SLinus Walleij * 646c5b64a99SLinus Walleij * A charger will be enabled depending on the requested charger type that was 647c5b64a99SLinus Walleij * detected previously. 648c5b64a99SLinus Walleij */ 649c5b64a99SLinus Walleij static void ab8500_chargalg_start_charging(struct ab8500_chargalg *di, 650bc6e0287SLinus Walleij int vset_uv, int iset_ua) 651c5b64a99SLinus Walleij { 652c5b64a99SLinus Walleij switch (di->chg_info.charger_type) { 653c5b64a99SLinus Walleij case AC_CHG: 654c5b64a99SLinus Walleij dev_dbg(di->dev, 655bc6e0287SLinus Walleij "AC parameters: Vset %d, Ich %d\n", vset_uv, iset_ua); 656c5b64a99SLinus Walleij ab8500_chargalg_usb_en(di, false, 0, 0); 657bc6e0287SLinus Walleij ab8500_chargalg_ac_en(di, true, vset_uv, iset_ua); 658c5b64a99SLinus Walleij break; 659c5b64a99SLinus Walleij 660c5b64a99SLinus Walleij case USB_CHG: 661c5b64a99SLinus Walleij dev_dbg(di->dev, 662bc6e0287SLinus Walleij "USB parameters: Vset %d, Ich %d\n", vset_uv, iset_ua); 663c5b64a99SLinus Walleij ab8500_chargalg_ac_en(di, false, 0, 0); 664bc6e0287SLinus Walleij ab8500_chargalg_usb_en(di, true, vset_uv, iset_ua); 665c5b64a99SLinus Walleij break; 666c5b64a99SLinus Walleij 667c5b64a99SLinus Walleij default: 668c5b64a99SLinus Walleij dev_err(di->dev, "Unknown charger to charge from\n"); 669c5b64a99SLinus Walleij break; 670c5b64a99SLinus Walleij } 671c5b64a99SLinus Walleij } 672c5b64a99SLinus Walleij 673c5b64a99SLinus Walleij /** 674c5b64a99SLinus Walleij * ab8500_chargalg_check_temp() - Check battery temperature ranges 675c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 676c5b64a99SLinus Walleij * 677c5b64a99SLinus Walleij * The battery temperature is checked against the predefined limits and the 678c5b64a99SLinus Walleij * charge state is changed accordingly 679c5b64a99SLinus Walleij */ 680c5b64a99SLinus Walleij static void ab8500_chargalg_check_temp(struct ab8500_chargalg *di) 681c5b64a99SLinus Walleij { 68225fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 6836252c706SLinus Walleij 6846252c706SLinus Walleij if (di->batt_data.temp > (bi->temp_alert_min + di->t_hyst_norm) && 6856252c706SLinus Walleij di->batt_data.temp < (bi->temp_alert_max - di->t_hyst_norm)) { 686c5b64a99SLinus Walleij /* Temp OK! */ 687c5b64a99SLinus Walleij di->events.btemp_underover = false; 6880e8b903bSLinus Walleij di->events.btemp_low = false; 6890e8b903bSLinus Walleij di->events.btemp_high = false; 690c5b64a99SLinus Walleij di->t_hyst_norm = 0; 691c5b64a99SLinus Walleij di->t_hyst_lowhigh = 0; 692c5b64a99SLinus Walleij } else { 6930e8b903bSLinus Walleij if ((di->batt_data.temp >= bi->temp_alert_max) && 6940e8b903bSLinus Walleij (di->batt_data.temp < (bi->temp_max - di->t_hyst_lowhigh))) { 6950e8b903bSLinus Walleij /* Alert zone for high temperature */ 696c5b64a99SLinus Walleij di->events.btemp_underover = false; 6970e8b903bSLinus Walleij di->events.btemp_high = true; 6980e8b903bSLinus Walleij di->t_hyst_norm = di->bm->temp_hysteresis; 6990e8b903bSLinus Walleij di->t_hyst_lowhigh = 0; 7000e8b903bSLinus Walleij } else if ((di->batt_data.temp > (bi->temp_min + di->t_hyst_lowhigh)) && 7010e8b903bSLinus Walleij (di->batt_data.temp <= bi->temp_alert_min)) { 7020e8b903bSLinus Walleij /* Alert zone for low temperature */ 7030e8b903bSLinus Walleij di->events.btemp_underover = false; 7040e8b903bSLinus Walleij di->events.btemp_low = true; 705c5b64a99SLinus Walleij di->t_hyst_norm = di->bm->temp_hysteresis; 706c5b64a99SLinus Walleij di->t_hyst_lowhigh = 0; 7076252c706SLinus Walleij } else if (di->batt_data.temp <= bi->temp_min || 7086252c706SLinus Walleij di->batt_data.temp >= bi->temp_max) { 709c5b64a99SLinus Walleij /* TEMP major!!!!! */ 710c5b64a99SLinus Walleij di->events.btemp_underover = true; 7110e8b903bSLinus Walleij di->events.btemp_low = false; 7120e8b903bSLinus Walleij di->events.btemp_high = false; 713c5b64a99SLinus Walleij di->t_hyst_norm = 0; 714c5b64a99SLinus Walleij di->t_hyst_lowhigh = di->bm->temp_hysteresis; 715c5b64a99SLinus Walleij } else { 716c5b64a99SLinus Walleij /* Within hysteresis */ 717c5b64a99SLinus Walleij dev_dbg(di->dev, "Within hysteresis limit temp: %d " 718c5b64a99SLinus Walleij "hyst_lowhigh %d, hyst normal %d\n", 719c5b64a99SLinus Walleij di->batt_data.temp, di->t_hyst_lowhigh, 720c5b64a99SLinus Walleij di->t_hyst_norm); 721c5b64a99SLinus Walleij } 722c5b64a99SLinus Walleij } 723c5b64a99SLinus Walleij } 724c5b64a99SLinus Walleij 725c5b64a99SLinus Walleij /** 726c5b64a99SLinus Walleij * ab8500_chargalg_check_charger_voltage() - Check charger voltage 727c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 728c5b64a99SLinus Walleij * 729c5b64a99SLinus Walleij * Charger voltage is checked against maximum limit 730c5b64a99SLinus Walleij */ 731c5b64a99SLinus Walleij static void ab8500_chargalg_check_charger_voltage(struct ab8500_chargalg *di) 732c5b64a99SLinus Walleij { 733bc6e0287SLinus Walleij if (di->chg_info.usb_volt_uv > di->bm->chg_params->usb_volt_max_uv) 734c5b64a99SLinus Walleij di->chg_info.usb_chg_ok = false; 735c5b64a99SLinus Walleij else 736c5b64a99SLinus Walleij di->chg_info.usb_chg_ok = true; 737c5b64a99SLinus Walleij 738bc6e0287SLinus Walleij if (di->chg_info.ac_volt_uv > di->bm->chg_params->ac_volt_max_uv) 739c5b64a99SLinus Walleij di->chg_info.ac_chg_ok = false; 740c5b64a99SLinus Walleij else 741c5b64a99SLinus Walleij di->chg_info.ac_chg_ok = true; 742c5b64a99SLinus Walleij 743c5b64a99SLinus Walleij } 744c5b64a99SLinus Walleij 745c5b64a99SLinus Walleij /** 746c5b64a99SLinus Walleij * ab8500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled 747c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 748c5b64a99SLinus Walleij * 749c5b64a99SLinus Walleij * End-of-charge criteria is fulfilled when the battery voltage is above a 750c5b64a99SLinus Walleij * certain limit and the battery current is below a certain limit for a 751c5b64a99SLinus Walleij * predefined number of consecutive seconds. If true, the battery is full 752c5b64a99SLinus Walleij */ 753c5b64a99SLinus Walleij static void ab8500_chargalg_end_of_charge(struct ab8500_chargalg *di) 754c5b64a99SLinus Walleij { 755c5b64a99SLinus Walleij if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING && 756c5b64a99SLinus Walleij di->charge_state == STATE_NORMAL && 7572a5f4183SLinus Walleij !di->maintenance_chg && (di->batt_data.volt_uv >= 758d662a7dfSLinus Walleij di->bm->bi->voltage_max_design_uv || 759c5b64a99SLinus Walleij di->events.usb_cv_active || di->events.ac_cv_active) && 7609c20899dSLinus Walleij di->batt_data.avg_curr_ua < 76125fd3303SLinus Walleij di->bm->bi->charge_term_current_ua && 7629c20899dSLinus Walleij di->batt_data.avg_curr_ua > 0) { 763c5b64a99SLinus Walleij if (++di->eoc_cnt >= EOC_COND_CNT) { 764c5b64a99SLinus Walleij di->eoc_cnt = 0; 765c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_FULL; 766c5b64a99SLinus Walleij di->maintenance_chg = true; 767c5b64a99SLinus Walleij dev_dbg(di->dev, "EOC reached!\n"); 768c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 769c5b64a99SLinus Walleij } else { 770c5b64a99SLinus Walleij dev_dbg(di->dev, 771c5b64a99SLinus Walleij " EOC limit reached for the %d" 772c5b64a99SLinus Walleij " time, out of %d before EOC\n", 773c5b64a99SLinus Walleij di->eoc_cnt, 774c5b64a99SLinus Walleij EOC_COND_CNT); 775c5b64a99SLinus Walleij } 776c5b64a99SLinus Walleij } else { 777c5b64a99SLinus Walleij di->eoc_cnt = 0; 778c5b64a99SLinus Walleij } 779c5b64a99SLinus Walleij } 780c5b64a99SLinus Walleij 781c5b64a99SLinus Walleij static void init_maxim_chg_curr(struct ab8500_chargalg *di) 782c5b64a99SLinus Walleij { 78325fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 78483e5aa77SLinus Walleij 78583e5aa77SLinus Walleij di->ccm.original_iset_ua = bi->constant_charge_current_max_ua; 78683e5aa77SLinus Walleij di->ccm.current_iset_ua = bi->constant_charge_current_max_ua; 78783e5aa77SLinus Walleij di->ccm.max_current_ua = di->bm->maxi->chg_curr_ua; 788c5b64a99SLinus Walleij di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 789c5b64a99SLinus Walleij di->ccm.level = 0; 790c5b64a99SLinus Walleij } 791c5b64a99SLinus Walleij 792c5b64a99SLinus Walleij /** 793c5b64a99SLinus Walleij * ab8500_chargalg_chg_curr_maxim - increases the charger current to 794c5b64a99SLinus Walleij * compensate for the system load 795c5b64a99SLinus Walleij * @di pointer to the ab8500_chargalg structure 796c5b64a99SLinus Walleij * 797c5b64a99SLinus Walleij * This maximization function is used to raise the charger current to get the 798c5b64a99SLinus Walleij * battery current as close to the optimal value as possible. The battery 799c5b64a99SLinus Walleij * current during charging is affected by the system load 800c5b64a99SLinus Walleij */ 801c5b64a99SLinus Walleij static enum maxim_ret ab8500_chargalg_chg_curr_maxim(struct ab8500_chargalg *di) 802c5b64a99SLinus Walleij { 80383e5aa77SLinus Walleij int delta_i_ua; 804c5b64a99SLinus Walleij 805c5b64a99SLinus Walleij if (!di->bm->maxi->ena_maxi) 806c5b64a99SLinus Walleij return MAXIM_RET_NOACTION; 807c5b64a99SLinus Walleij 80883e5aa77SLinus Walleij delta_i_ua = di->ccm.original_iset_ua - di->batt_data.inst_curr_ua; 809c5b64a99SLinus Walleij 810c5b64a99SLinus Walleij if (di->events.vbus_collapsed) { 811c5b64a99SLinus Walleij dev_dbg(di->dev, "Charger voltage has collapsed %d\n", 812c5b64a99SLinus Walleij di->ccm.wait_cnt); 813c5b64a99SLinus Walleij if (di->ccm.wait_cnt == 0) { 814c5b64a99SLinus Walleij dev_dbg(di->dev, "lowering current\n"); 815c5b64a99SLinus Walleij di->ccm.wait_cnt++; 816c5b64a99SLinus Walleij di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 81705906f58SLinus Walleij di->ccm.max_current_ua = di->ccm.current_iset_ua; 81883e5aa77SLinus Walleij di->ccm.current_iset_ua = di->ccm.max_current_ua; 819c5b64a99SLinus Walleij di->ccm.level--; 820c5b64a99SLinus Walleij return MAXIM_RET_CHANGE; 821c5b64a99SLinus Walleij } else { 822c5b64a99SLinus Walleij dev_dbg(di->dev, "waiting\n"); 823c5b64a99SLinus Walleij /* Let's go in here twice before lowering curr again */ 824c5b64a99SLinus Walleij di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3; 825c5b64a99SLinus Walleij return MAXIM_RET_NOACTION; 826c5b64a99SLinus Walleij } 827c5b64a99SLinus Walleij } 828c5b64a99SLinus Walleij 829c5b64a99SLinus Walleij di->ccm.wait_cnt = 0; 830c5b64a99SLinus Walleij 83183e5aa77SLinus Walleij if (di->batt_data.inst_curr_ua > di->ccm.original_iset_ua) { 83283e5aa77SLinus Walleij dev_dbg(di->dev, " Maximization Ibat (%duA) too high" 83383e5aa77SLinus Walleij " (limit %duA) (current iset: %duA)!\n", 83483e5aa77SLinus Walleij di->batt_data.inst_curr_ua, di->ccm.original_iset_ua, 83583e5aa77SLinus Walleij di->ccm.current_iset_ua); 836c5b64a99SLinus Walleij 83783e5aa77SLinus Walleij if (di->ccm.current_iset_ua == di->ccm.original_iset_ua) 838c5b64a99SLinus Walleij return MAXIM_RET_NOACTION; 839c5b64a99SLinus Walleij 840c5b64a99SLinus Walleij di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 84183e5aa77SLinus Walleij di->ccm.current_iset_ua = di->ccm.original_iset_ua; 842c5b64a99SLinus Walleij di->ccm.level = 0; 843c5b64a99SLinus Walleij 844c5b64a99SLinus Walleij return MAXIM_RET_IBAT_TOO_HIGH; 845c5b64a99SLinus Walleij } 846c5b64a99SLinus Walleij 847c5b64a99SLinus Walleij di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 848c5b64a99SLinus Walleij return MAXIM_RET_NOACTION; 849c5b64a99SLinus Walleij } 850c5b64a99SLinus Walleij 851c5b64a99SLinus Walleij static void handle_maxim_chg_curr(struct ab8500_chargalg *di) 852c5b64a99SLinus Walleij { 85325fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 854c5b64a99SLinus Walleij enum maxim_ret ret; 855c5b64a99SLinus Walleij int result; 856c5b64a99SLinus Walleij 857c5b64a99SLinus Walleij ret = ab8500_chargalg_chg_curr_maxim(di); 858c5b64a99SLinus Walleij switch (ret) { 859c5b64a99SLinus Walleij case MAXIM_RET_CHANGE: 860c5b64a99SLinus Walleij result = ab8500_chargalg_update_chg_curr(di, 86183e5aa77SLinus Walleij di->ccm.current_iset_ua); 862c5b64a99SLinus Walleij if (result) 863c5b64a99SLinus Walleij dev_err(di->dev, "failed to set chg curr\n"); 864c5b64a99SLinus Walleij break; 865c5b64a99SLinus Walleij case MAXIM_RET_IBAT_TOO_HIGH: 866c5b64a99SLinus Walleij result = ab8500_chargalg_update_chg_curr(di, 86783e5aa77SLinus Walleij bi->constant_charge_current_max_ua); 868c5b64a99SLinus Walleij if (result) 869c5b64a99SLinus Walleij dev_err(di->dev, "failed to set chg curr\n"); 870c5b64a99SLinus Walleij break; 871c5b64a99SLinus Walleij 872c5b64a99SLinus Walleij case MAXIM_RET_NOACTION: 873c5b64a99SLinus Walleij default: 874c5b64a99SLinus Walleij /* Do nothing..*/ 875c5b64a99SLinus Walleij break; 876c5b64a99SLinus Walleij } 877c5b64a99SLinus Walleij } 878c5b64a99SLinus Walleij 879c5b64a99SLinus Walleij static int ab8500_chargalg_get_ext_psy_data(struct device *dev, void *data) 880c5b64a99SLinus Walleij { 881c5b64a99SLinus Walleij struct power_supply *psy; 882c5b64a99SLinus Walleij struct power_supply *ext = dev_get_drvdata(dev); 883c5b64a99SLinus Walleij const char **supplicants = (const char **)ext->supplied_to; 884c5b64a99SLinus Walleij struct ab8500_chargalg *di; 885c5b64a99SLinus Walleij union power_supply_propval ret; 886c5b64a99SLinus Walleij int j; 887c5b64a99SLinus Walleij bool capacity_updated = false; 888c5b64a99SLinus Walleij 889c5b64a99SLinus Walleij psy = (struct power_supply *)data; 890c5b64a99SLinus Walleij di = power_supply_get_drvdata(psy); 891c5b64a99SLinus Walleij /* For all psy where the driver name appears in any supplied_to */ 892c5b64a99SLinus Walleij j = match_string(supplicants, ext->num_supplicants, psy->desc->name); 893c5b64a99SLinus Walleij if (j < 0) 894c5b64a99SLinus Walleij return 0; 895c5b64a99SLinus Walleij 896c5b64a99SLinus Walleij /* 897c5b64a99SLinus Walleij * If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its 898c5b64a99SLinus Walleij * property because of handling that sysfs entry on its own, this is 899c5b64a99SLinus Walleij * the place to get the battery capacity. 900c5b64a99SLinus Walleij */ 901c5b64a99SLinus Walleij if (!power_supply_get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) { 902c5b64a99SLinus Walleij di->batt_data.percent = ret.intval; 903c5b64a99SLinus Walleij capacity_updated = true; 904c5b64a99SLinus Walleij } 905c5b64a99SLinus Walleij 906c5b64a99SLinus Walleij /* Go through all properties for the psy */ 907c5b64a99SLinus Walleij for (j = 0; j < ext->desc->num_properties; j++) { 908c5b64a99SLinus Walleij enum power_supply_property prop; 909c5b64a99SLinus Walleij prop = ext->desc->properties[j]; 910c5b64a99SLinus Walleij 911c5b64a99SLinus Walleij /* 912c5b64a99SLinus Walleij * Initialize chargers if not already done. 913c5b64a99SLinus Walleij * The ab8500_charger*/ 914c5b64a99SLinus Walleij if (!di->ac_chg && 915c5b64a99SLinus Walleij ext->desc->type == POWER_SUPPLY_TYPE_MAINS) 916c5b64a99SLinus Walleij di->ac_chg = psy_to_ux500_charger(ext); 917c5b64a99SLinus Walleij else if (!di->usb_chg && 918c5b64a99SLinus Walleij ext->desc->type == POWER_SUPPLY_TYPE_USB) 919c5b64a99SLinus Walleij di->usb_chg = psy_to_ux500_charger(ext); 920c5b64a99SLinus Walleij 921c5b64a99SLinus Walleij if (power_supply_get_property(ext, prop, &ret)) 922c5b64a99SLinus Walleij continue; 923c5b64a99SLinus Walleij switch (prop) { 924c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_PRESENT: 925c5b64a99SLinus Walleij switch (ext->desc->type) { 926c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 927c5b64a99SLinus Walleij /* Battery present */ 928c5b64a99SLinus Walleij if (ret.intval) 929c5b64a99SLinus Walleij di->events.batt_rem = false; 930c5b64a99SLinus Walleij /* Battery removed */ 931c5b64a99SLinus Walleij else 932c5b64a99SLinus Walleij di->events.batt_rem = true; 933c5b64a99SLinus Walleij break; 934c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 935c5b64a99SLinus Walleij /* AC disconnected */ 936c5b64a99SLinus Walleij if (!ret.intval && 937c5b64a99SLinus Walleij (di->chg_info.conn_chg & AC_CHG)) { 938c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = 939c5b64a99SLinus Walleij di->chg_info.conn_chg; 940c5b64a99SLinus Walleij di->chg_info.conn_chg &= ~AC_CHG; 941c5b64a99SLinus Walleij } 942c5b64a99SLinus Walleij /* AC connected */ 943c5b64a99SLinus Walleij else if (ret.intval && 944c5b64a99SLinus Walleij !(di->chg_info.conn_chg & AC_CHG)) { 945c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = 946c5b64a99SLinus Walleij di->chg_info.conn_chg; 947c5b64a99SLinus Walleij di->chg_info.conn_chg |= AC_CHG; 948c5b64a99SLinus Walleij } 949c5b64a99SLinus Walleij break; 950c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 951c5b64a99SLinus Walleij /* USB disconnected */ 952c5b64a99SLinus Walleij if (!ret.intval && 953c5b64a99SLinus Walleij (di->chg_info.conn_chg & USB_CHG)) { 954c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = 955c5b64a99SLinus Walleij di->chg_info.conn_chg; 956c5b64a99SLinus Walleij di->chg_info.conn_chg &= ~USB_CHG; 957c5b64a99SLinus Walleij } 958c5b64a99SLinus Walleij /* USB connected */ 959c5b64a99SLinus Walleij else if (ret.intval && 960c5b64a99SLinus Walleij !(di->chg_info.conn_chg & USB_CHG)) { 961c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = 962c5b64a99SLinus Walleij di->chg_info.conn_chg; 963c5b64a99SLinus Walleij di->chg_info.conn_chg |= USB_CHG; 964c5b64a99SLinus Walleij } 965c5b64a99SLinus Walleij break; 966c5b64a99SLinus Walleij default: 967c5b64a99SLinus Walleij break; 968c5b64a99SLinus Walleij } 969c5b64a99SLinus Walleij break; 970c5b64a99SLinus Walleij 971c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_ONLINE: 972c5b64a99SLinus Walleij switch (ext->desc->type) { 973c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 974c5b64a99SLinus Walleij break; 975c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 976c5b64a99SLinus Walleij /* AC offline */ 977c5b64a99SLinus Walleij if (!ret.intval && 978c5b64a99SLinus Walleij (di->chg_info.online_chg & AC_CHG)) { 979c5b64a99SLinus Walleij di->chg_info.prev_online_chg = 980c5b64a99SLinus Walleij di->chg_info.online_chg; 981c5b64a99SLinus Walleij di->chg_info.online_chg &= ~AC_CHG; 982c5b64a99SLinus Walleij } 983c5b64a99SLinus Walleij /* AC online */ 984c5b64a99SLinus Walleij else if (ret.intval && 985c5b64a99SLinus Walleij !(di->chg_info.online_chg & AC_CHG)) { 986c5b64a99SLinus Walleij di->chg_info.prev_online_chg = 987c5b64a99SLinus Walleij di->chg_info.online_chg; 988c5b64a99SLinus Walleij di->chg_info.online_chg |= AC_CHG; 989c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 990c5b64a99SLinus Walleij &di->chargalg_wd_work, 0); 991c5b64a99SLinus Walleij } 992c5b64a99SLinus Walleij break; 993c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 994c5b64a99SLinus Walleij /* USB offline */ 995c5b64a99SLinus Walleij if (!ret.intval && 996c5b64a99SLinus Walleij (di->chg_info.online_chg & USB_CHG)) { 997c5b64a99SLinus Walleij di->chg_info.prev_online_chg = 998c5b64a99SLinus Walleij di->chg_info.online_chg; 999c5b64a99SLinus Walleij di->chg_info.online_chg &= ~USB_CHG; 1000c5b64a99SLinus Walleij } 1001c5b64a99SLinus Walleij /* USB online */ 1002c5b64a99SLinus Walleij else if (ret.intval && 1003c5b64a99SLinus Walleij !(di->chg_info.online_chg & USB_CHG)) { 1004c5b64a99SLinus Walleij di->chg_info.prev_online_chg = 1005c5b64a99SLinus Walleij di->chg_info.online_chg; 1006c5b64a99SLinus Walleij di->chg_info.online_chg |= USB_CHG; 1007c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1008c5b64a99SLinus Walleij &di->chargalg_wd_work, 0); 1009c5b64a99SLinus Walleij } 1010c5b64a99SLinus Walleij break; 1011c5b64a99SLinus Walleij default: 1012c5b64a99SLinus Walleij break; 1013c5b64a99SLinus Walleij } 1014c5b64a99SLinus Walleij break; 1015c5b64a99SLinus Walleij 1016c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_HEALTH: 1017c5b64a99SLinus Walleij switch (ext->desc->type) { 1018c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 1019c5b64a99SLinus Walleij break; 1020c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 1021c5b64a99SLinus Walleij switch (ret.intval) { 1022c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: 1023c5b64a99SLinus Walleij di->events.mainextchnotok = true; 1024c5b64a99SLinus Walleij di->events.main_thermal_prot = false; 1025c5b64a99SLinus Walleij di->events.main_ovv = false; 1026c5b64a99SLinus Walleij di->events.ac_wd_expired = false; 1027c5b64a99SLinus Walleij break; 1028c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_DEAD: 1029c5b64a99SLinus Walleij di->events.ac_wd_expired = true; 1030c5b64a99SLinus Walleij di->events.mainextchnotok = false; 1031c5b64a99SLinus Walleij di->events.main_ovv = false; 1032c5b64a99SLinus Walleij di->events.main_thermal_prot = false; 1033c5b64a99SLinus Walleij break; 1034c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_COLD: 1035c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_OVERHEAT: 1036c5b64a99SLinus Walleij di->events.main_thermal_prot = true; 1037c5b64a99SLinus Walleij di->events.mainextchnotok = false; 1038c5b64a99SLinus Walleij di->events.main_ovv = false; 1039c5b64a99SLinus Walleij di->events.ac_wd_expired = false; 1040c5b64a99SLinus Walleij break; 1041c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_OVERVOLTAGE: 1042c5b64a99SLinus Walleij di->events.main_ovv = true; 1043c5b64a99SLinus Walleij di->events.mainextchnotok = false; 1044c5b64a99SLinus Walleij di->events.main_thermal_prot = false; 1045c5b64a99SLinus Walleij di->events.ac_wd_expired = false; 1046c5b64a99SLinus Walleij break; 1047c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_GOOD: 1048c5b64a99SLinus Walleij di->events.main_thermal_prot = false; 1049c5b64a99SLinus Walleij di->events.mainextchnotok = false; 1050c5b64a99SLinus Walleij di->events.main_ovv = false; 1051c5b64a99SLinus Walleij di->events.ac_wd_expired = false; 1052c5b64a99SLinus Walleij break; 1053c5b64a99SLinus Walleij default: 1054c5b64a99SLinus Walleij break; 1055c5b64a99SLinus Walleij } 1056c5b64a99SLinus Walleij break; 1057c5b64a99SLinus Walleij 1058c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1059c5b64a99SLinus Walleij switch (ret.intval) { 1060c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: 1061c5b64a99SLinus Walleij di->events.usbchargernotok = true; 1062c5b64a99SLinus Walleij di->events.usb_thermal_prot = false; 1063c5b64a99SLinus Walleij di->events.vbus_ovv = false; 1064c5b64a99SLinus Walleij di->events.usb_wd_expired = false; 1065c5b64a99SLinus Walleij break; 1066c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_DEAD: 1067c5b64a99SLinus Walleij di->events.usb_wd_expired = true; 1068c5b64a99SLinus Walleij di->events.usbchargernotok = false; 1069c5b64a99SLinus Walleij di->events.usb_thermal_prot = false; 1070c5b64a99SLinus Walleij di->events.vbus_ovv = false; 1071c5b64a99SLinus Walleij break; 1072c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_COLD: 1073c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_OVERHEAT: 1074c5b64a99SLinus Walleij di->events.usb_thermal_prot = true; 1075c5b64a99SLinus Walleij di->events.usbchargernotok = false; 1076c5b64a99SLinus Walleij di->events.vbus_ovv = false; 1077c5b64a99SLinus Walleij di->events.usb_wd_expired = false; 1078c5b64a99SLinus Walleij break; 1079c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_OVERVOLTAGE: 1080c5b64a99SLinus Walleij di->events.vbus_ovv = true; 1081c5b64a99SLinus Walleij di->events.usbchargernotok = false; 1082c5b64a99SLinus Walleij di->events.usb_thermal_prot = false; 1083c5b64a99SLinus Walleij di->events.usb_wd_expired = false; 1084c5b64a99SLinus Walleij break; 1085c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_GOOD: 1086c5b64a99SLinus Walleij di->events.usbchargernotok = false; 1087c5b64a99SLinus Walleij di->events.usb_thermal_prot = false; 1088c5b64a99SLinus Walleij di->events.vbus_ovv = false; 1089c5b64a99SLinus Walleij di->events.usb_wd_expired = false; 1090c5b64a99SLinus Walleij break; 1091c5b64a99SLinus Walleij default: 1092c5b64a99SLinus Walleij break; 1093c5b64a99SLinus Walleij } 10944520dcbeSLinus Torvalds break; 1095c5b64a99SLinus Walleij default: 1096c5b64a99SLinus Walleij break; 1097c5b64a99SLinus Walleij } 1098c5b64a99SLinus Walleij break; 1099c5b64a99SLinus Walleij 1100c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_VOLTAGE_NOW: 1101c5b64a99SLinus Walleij switch (ext->desc->type) { 1102c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 11032a5f4183SLinus Walleij di->batt_data.volt_uv = ret.intval; 1104c5b64a99SLinus Walleij break; 1105c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 1106bc6e0287SLinus Walleij di->chg_info.ac_volt_uv = ret.intval; 1107c5b64a99SLinus Walleij break; 1108c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1109bc6e0287SLinus Walleij di->chg_info.usb_volt_uv = ret.intval; 1110c5b64a99SLinus Walleij break; 1111c5b64a99SLinus Walleij default: 1112c5b64a99SLinus Walleij break; 1113c5b64a99SLinus Walleij } 1114c5b64a99SLinus Walleij break; 1115c5b64a99SLinus Walleij 1116c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_VOLTAGE_AVG: 1117c5b64a99SLinus Walleij switch (ext->desc->type) { 1118c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 1119c5b64a99SLinus Walleij /* AVG is used to indicate when we are 1120c5b64a99SLinus Walleij * in CV mode */ 1121c5b64a99SLinus Walleij if (ret.intval) 1122c5b64a99SLinus Walleij di->events.ac_cv_active = true; 1123c5b64a99SLinus Walleij else 1124c5b64a99SLinus Walleij di->events.ac_cv_active = false; 1125c5b64a99SLinus Walleij 1126c5b64a99SLinus Walleij break; 1127c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1128c5b64a99SLinus Walleij /* AVG is used to indicate when we are 1129c5b64a99SLinus Walleij * in CV mode */ 1130c5b64a99SLinus Walleij if (ret.intval) 1131c5b64a99SLinus Walleij di->events.usb_cv_active = true; 1132c5b64a99SLinus Walleij else 1133c5b64a99SLinus Walleij di->events.usb_cv_active = false; 1134c5b64a99SLinus Walleij 1135c5b64a99SLinus Walleij break; 1136c5b64a99SLinus Walleij default: 1137c5b64a99SLinus Walleij break; 1138c5b64a99SLinus Walleij } 1139c5b64a99SLinus Walleij break; 1140c5b64a99SLinus Walleij 1141c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_TECHNOLOGY: 1142c5b64a99SLinus Walleij switch (ext->desc->type) { 1143c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 1144c5b64a99SLinus Walleij if (ret.intval) 1145c5b64a99SLinus Walleij di->events.batt_unknown = false; 1146c5b64a99SLinus Walleij else 1147c5b64a99SLinus Walleij di->events.batt_unknown = true; 1148c5b64a99SLinus Walleij 1149c5b64a99SLinus Walleij break; 1150c5b64a99SLinus Walleij default: 1151c5b64a99SLinus Walleij break; 1152c5b64a99SLinus Walleij } 1153c5b64a99SLinus Walleij break; 1154c5b64a99SLinus Walleij 1155c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_TEMP: 1156c5b64a99SLinus Walleij di->batt_data.temp = ret.intval / 10; 1157c5b64a99SLinus Walleij break; 1158c5b64a99SLinus Walleij 1159c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_CURRENT_NOW: 1160c5b64a99SLinus Walleij switch (ext->desc->type) { 1161c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 116283e5aa77SLinus Walleij di->chg_info.ac_curr_ua = ret.intval; 1163c5b64a99SLinus Walleij break; 1164c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 116583e5aa77SLinus Walleij di->chg_info.usb_curr_ua = ret.intval; 1166c5b64a99SLinus Walleij break; 1167c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 116883e5aa77SLinus Walleij di->batt_data.inst_curr_ua = ret.intval; 1169c5b64a99SLinus Walleij break; 1170c5b64a99SLinus Walleij default: 1171c5b64a99SLinus Walleij break; 1172c5b64a99SLinus Walleij } 1173c5b64a99SLinus Walleij break; 1174c5b64a99SLinus Walleij 1175c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_CURRENT_AVG: 1176c5b64a99SLinus Walleij switch (ext->desc->type) { 1177c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 11789c20899dSLinus Walleij di->batt_data.avg_curr_ua = ret.intval; 1179c5b64a99SLinus Walleij break; 1180c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1181c5b64a99SLinus Walleij if (ret.intval) 1182c5b64a99SLinus Walleij di->events.vbus_collapsed = true; 1183c5b64a99SLinus Walleij else 1184c5b64a99SLinus Walleij di->events.vbus_collapsed = false; 1185c5b64a99SLinus Walleij break; 1186c5b64a99SLinus Walleij default: 1187c5b64a99SLinus Walleij break; 1188c5b64a99SLinus Walleij } 1189c5b64a99SLinus Walleij break; 1190c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_CAPACITY: 1191c5b64a99SLinus Walleij if (!capacity_updated) 1192c5b64a99SLinus Walleij di->batt_data.percent = ret.intval; 1193c5b64a99SLinus Walleij break; 1194c5b64a99SLinus Walleij default: 1195c5b64a99SLinus Walleij break; 1196c5b64a99SLinus Walleij } 1197c5b64a99SLinus Walleij } 1198c5b64a99SLinus Walleij return 0; 1199c5b64a99SLinus Walleij } 1200c5b64a99SLinus Walleij 1201c5b64a99SLinus Walleij /** 1202c5b64a99SLinus Walleij * ab8500_chargalg_external_power_changed() - callback for power supply changes 1203c5b64a99SLinus Walleij * @psy: pointer to the structure power_supply 1204c5b64a99SLinus Walleij * 1205c5b64a99SLinus Walleij * This function is the entry point of the pointer external_power_changed 1206c5b64a99SLinus Walleij * of the structure power_supply. 1207c5b64a99SLinus Walleij * This function gets executed when there is a change in any external power 1208c5b64a99SLinus Walleij * supply that this driver needs to be notified of. 1209c5b64a99SLinus Walleij */ 1210c5b64a99SLinus Walleij static void ab8500_chargalg_external_power_changed(struct power_supply *psy) 1211c5b64a99SLinus Walleij { 1212c5b64a99SLinus Walleij struct ab8500_chargalg *di = power_supply_get_drvdata(psy); 1213c5b64a99SLinus Walleij 1214c5b64a99SLinus Walleij /* 1215c5b64a99SLinus Walleij * Trigger execution of the algorithm instantly and read 1216c5b64a99SLinus Walleij * all power_supply properties there instead 1217c5b64a99SLinus Walleij */ 1218661d10eeSLinus Walleij if (di->chargalg_wq) 1219c5b64a99SLinus Walleij queue_work(di->chargalg_wq, &di->chargalg_work); 1220c5b64a99SLinus Walleij } 1221c5b64a99SLinus Walleij 1222c5b64a99SLinus Walleij /** 1223c5b64a99SLinus Walleij * ab8500_chargalg_algorithm() - Main function for the algorithm 1224c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 1225c5b64a99SLinus Walleij * 1226c5b64a99SLinus Walleij * This is the main control function for the charging algorithm. 1227c5b64a99SLinus Walleij * It is called periodically or when something happens that will 1228c5b64a99SLinus Walleij * trigger a state change 1229c5b64a99SLinus Walleij */ 1230c5b64a99SLinus Walleij static void ab8500_chargalg_algorithm(struct ab8500_chargalg *di) 1231c5b64a99SLinus Walleij { 123225fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 1233d72ce7d3SLinus Walleij struct power_supply_maintenance_charge_table *mt; 1234c5b64a99SLinus Walleij int charger_status; 1235c5b64a99SLinus Walleij int ret; 1236c5b64a99SLinus Walleij 1237c5b64a99SLinus Walleij /* Collect data from all power_supply class devices */ 1238c5b64a99SLinus Walleij class_for_each_device(power_supply_class, NULL, 1239c5b64a99SLinus Walleij di->chargalg_psy, ab8500_chargalg_get_ext_psy_data); 1240c5b64a99SLinus Walleij 1241c5b64a99SLinus Walleij ab8500_chargalg_end_of_charge(di); 1242c5b64a99SLinus Walleij ab8500_chargalg_check_temp(di); 1243c5b64a99SLinus Walleij ab8500_chargalg_check_charger_voltage(di); 1244c5b64a99SLinus Walleij 1245c5b64a99SLinus Walleij charger_status = ab8500_chargalg_check_charger_connection(di); 1246c5b64a99SLinus Walleij 1247c5b64a99SLinus Walleij if (is_ab8500(di->parent)) { 1248c5b64a99SLinus Walleij ret = ab8500_chargalg_check_charger_enable(di); 1249c5b64a99SLinus Walleij if (ret < 0) 1250c5b64a99SLinus Walleij dev_err(di->dev, "Checking charger is enabled error" 1251c5b64a99SLinus Walleij ": Returned Value %d\n", ret); 1252c5b64a99SLinus Walleij } 1253c5b64a99SLinus Walleij 1254c5b64a99SLinus Walleij /* 1255c5b64a99SLinus Walleij * First check if we have a charger connected. 1256c5b64a99SLinus Walleij * Also we don't allow charging of unknown batteries if configured 1257c5b64a99SLinus Walleij * this way 1258c5b64a99SLinus Walleij */ 1259c5b64a99SLinus Walleij if (!charger_status || 1260c5b64a99SLinus Walleij (di->events.batt_unknown && !di->bm->chg_unknown_bat)) { 1261c5b64a99SLinus Walleij if (di->charge_state != STATE_HANDHELD) { 1262c5b64a99SLinus Walleij di->events.safety_timer_expired = false; 1263c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_HANDHELD_INIT); 1264c5b64a99SLinus Walleij } 1265c5b64a99SLinus Walleij } 1266c5b64a99SLinus Walleij 1267c5b64a99SLinus Walleij /* Safety timer expiration */ 1268c5b64a99SLinus Walleij else if (di->events.safety_timer_expired) { 1269c5b64a99SLinus Walleij if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED) 1270c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1271c5b64a99SLinus Walleij STATE_SAFETY_TIMER_EXPIRED_INIT); 1272c5b64a99SLinus Walleij } 1273c5b64a99SLinus Walleij /* 1274*8652b62eSColin Ian King * Check if any interrupts has occurred 1275c5b64a99SLinus Walleij * that will prevent us from charging 1276c5b64a99SLinus Walleij */ 1277c5b64a99SLinus Walleij 1278c5b64a99SLinus Walleij /* Battery removed */ 1279c5b64a99SLinus Walleij else if (di->events.batt_rem) { 1280c5b64a99SLinus Walleij if (di->charge_state != STATE_BATT_REMOVED) 1281c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT); 1282c5b64a99SLinus Walleij } 1283c5b64a99SLinus Walleij /* Main or USB charger not ok. */ 1284c5b64a99SLinus Walleij else if (di->events.mainextchnotok || di->events.usbchargernotok) { 1285c5b64a99SLinus Walleij /* 1286c5b64a99SLinus Walleij * If vbus_collapsed is set, we have to lower the charger 1287c5b64a99SLinus Walleij * current, which is done in the normal state below 1288c5b64a99SLinus Walleij */ 1289c5b64a99SLinus Walleij if (di->charge_state != STATE_CHG_NOT_OK && 1290c5b64a99SLinus Walleij !di->events.vbus_collapsed) 1291c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT); 1292c5b64a99SLinus Walleij } 1293c5b64a99SLinus Walleij /* VBUS, Main or VBAT OVV. */ 1294c5b64a99SLinus Walleij else if (di->events.vbus_ovv || 1295c5b64a99SLinus Walleij di->events.main_ovv || 1296c5b64a99SLinus Walleij di->events.batt_ovv || 1297c5b64a99SLinus Walleij !di->chg_info.usb_chg_ok || 1298c5b64a99SLinus Walleij !di->chg_info.ac_chg_ok) { 1299c5b64a99SLinus Walleij if (di->charge_state != STATE_OVV_PROTECT) 1300c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT); 1301c5b64a99SLinus Walleij } 1302c5b64a99SLinus Walleij /* USB Thermal, stop charging */ 1303c5b64a99SLinus Walleij else if (di->events.main_thermal_prot || 1304c5b64a99SLinus Walleij di->events.usb_thermal_prot) { 1305c5b64a99SLinus Walleij if (di->charge_state != STATE_HW_TEMP_PROTECT) 1306c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1307c5b64a99SLinus Walleij STATE_HW_TEMP_PROTECT_INIT); 1308c5b64a99SLinus Walleij } 1309c5b64a99SLinus Walleij /* Battery temp over/under */ 1310c5b64a99SLinus Walleij else if (di->events.btemp_underover) { 1311c5b64a99SLinus Walleij if (di->charge_state != STATE_TEMP_UNDEROVER) 1312c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1313c5b64a99SLinus Walleij STATE_TEMP_UNDEROVER_INIT); 1314c5b64a99SLinus Walleij } 1315c5b64a99SLinus Walleij /* Watchdog expired */ 1316c5b64a99SLinus Walleij else if (di->events.ac_wd_expired || 1317c5b64a99SLinus Walleij di->events.usb_wd_expired) { 1318c5b64a99SLinus Walleij if (di->charge_state != STATE_WD_EXPIRED) 1319c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT); 1320c5b64a99SLinus Walleij } 1321c5b64a99SLinus Walleij /* Battery temp high/low */ 13220e8b903bSLinus Walleij else if (di->events.btemp_low || di->events.btemp_high) { 1323c5b64a99SLinus Walleij if (di->charge_state != STATE_TEMP_LOWHIGH) 1324c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT); 1325c5b64a99SLinus Walleij } 1326c5b64a99SLinus Walleij 1327c5b64a99SLinus Walleij dev_dbg(di->dev, 1328c5b64a99SLinus Walleij "[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d " 1329c5b64a99SLinus Walleij "State %s Active_chg %d Chg_status %d AC %d USB %d " 1330c5b64a99SLinus Walleij "AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d " 1331c5b64a99SLinus Walleij "USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n", 13322a5f4183SLinus Walleij di->batt_data.volt_uv, 13339c20899dSLinus Walleij di->batt_data.avg_curr_ua, 133483e5aa77SLinus Walleij di->batt_data.inst_curr_ua, 1335c5b64a99SLinus Walleij di->batt_data.temp, 1336c5b64a99SLinus Walleij di->batt_data.percent, 1337c5b64a99SLinus Walleij di->maintenance_chg, 1338c5b64a99SLinus Walleij states[di->charge_state], 1339c5b64a99SLinus Walleij di->chg_info.charger_type, 1340c5b64a99SLinus Walleij di->charge_status, 1341c5b64a99SLinus Walleij di->chg_info.conn_chg & AC_CHG, 1342c5b64a99SLinus Walleij di->chg_info.conn_chg & USB_CHG, 1343c5b64a99SLinus Walleij di->chg_info.online_chg & AC_CHG, 1344c5b64a99SLinus Walleij di->chg_info.online_chg & USB_CHG, 1345c5b64a99SLinus Walleij di->events.ac_cv_active, 1346c5b64a99SLinus Walleij di->events.usb_cv_active, 134783e5aa77SLinus Walleij di->chg_info.ac_curr_ua, 134883e5aa77SLinus Walleij di->chg_info.usb_curr_ua, 1349bc6e0287SLinus Walleij di->chg_info.ac_vset_uv, 135083e5aa77SLinus Walleij di->chg_info.ac_iset_ua, 1351bc6e0287SLinus Walleij di->chg_info.usb_vset_uv, 135283e5aa77SLinus Walleij di->chg_info.usb_iset_ua); 1353c5b64a99SLinus Walleij 1354c5b64a99SLinus Walleij switch (di->charge_state) { 1355c5b64a99SLinus Walleij case STATE_HANDHELD_INIT: 1356c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1357c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; 1358c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_HANDHELD); 1359c5b64a99SLinus Walleij fallthrough; 1360c5b64a99SLinus Walleij 1361c5b64a99SLinus Walleij case STATE_HANDHELD: 1362c5b64a99SLinus Walleij break; 1363c5b64a99SLinus Walleij 1364c5b64a99SLinus Walleij case STATE_BATT_REMOVED_INIT: 1365c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1366c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_BATT_REMOVED); 1367c5b64a99SLinus Walleij fallthrough; 1368c5b64a99SLinus Walleij 1369c5b64a99SLinus Walleij case STATE_BATT_REMOVED: 1370c5b64a99SLinus Walleij if (!di->events.batt_rem) 1371c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1372c5b64a99SLinus Walleij break; 1373c5b64a99SLinus Walleij 1374c5b64a99SLinus Walleij case STATE_HW_TEMP_PROTECT_INIT: 1375c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1376c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT); 1377c5b64a99SLinus Walleij fallthrough; 1378c5b64a99SLinus Walleij 1379c5b64a99SLinus Walleij case STATE_HW_TEMP_PROTECT: 1380c5b64a99SLinus Walleij if (!di->events.main_thermal_prot && 1381c5b64a99SLinus Walleij !di->events.usb_thermal_prot) 1382c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1383c5b64a99SLinus Walleij break; 1384c5b64a99SLinus Walleij 1385c5b64a99SLinus Walleij case STATE_OVV_PROTECT_INIT: 1386c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1387c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_OVV_PROTECT); 1388c5b64a99SLinus Walleij fallthrough; 1389c5b64a99SLinus Walleij 1390c5b64a99SLinus Walleij case STATE_OVV_PROTECT: 1391c5b64a99SLinus Walleij if (!di->events.vbus_ovv && 1392c5b64a99SLinus Walleij !di->events.main_ovv && 1393c5b64a99SLinus Walleij !di->events.batt_ovv && 1394c5b64a99SLinus Walleij di->chg_info.usb_chg_ok && 1395c5b64a99SLinus Walleij di->chg_info.ac_chg_ok) 1396c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1397c5b64a99SLinus Walleij break; 1398c5b64a99SLinus Walleij 1399c5b64a99SLinus Walleij case STATE_CHG_NOT_OK_INIT: 1400c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1401c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_CHG_NOT_OK); 1402c5b64a99SLinus Walleij fallthrough; 1403c5b64a99SLinus Walleij 1404c5b64a99SLinus Walleij case STATE_CHG_NOT_OK: 1405c5b64a99SLinus Walleij if (!di->events.mainextchnotok && 1406c5b64a99SLinus Walleij !di->events.usbchargernotok) 1407c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1408c5b64a99SLinus Walleij break; 1409c5b64a99SLinus Walleij 1410c5b64a99SLinus Walleij case STATE_SAFETY_TIMER_EXPIRED_INIT: 1411c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1412c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED); 1413c5b64a99SLinus Walleij fallthrough; 1414c5b64a99SLinus Walleij 1415c5b64a99SLinus Walleij case STATE_SAFETY_TIMER_EXPIRED: 1416c5b64a99SLinus Walleij /* We exit this state when charger is removed */ 1417c5b64a99SLinus Walleij break; 1418c5b64a99SLinus Walleij 1419c5b64a99SLinus Walleij case STATE_NORMAL_INIT: 142005906f58SLinus Walleij if (bi->constant_charge_current_max_ua == 0) 142105906f58SLinus Walleij /* "charging" with 0 uA */ 1422c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1423c5b64a99SLinus Walleij else { 1424c5b64a99SLinus Walleij ab8500_chargalg_start_charging(di, 1425bc6e0287SLinus Walleij bi->constant_charge_voltage_max_uv, 142605906f58SLinus Walleij bi->constant_charge_current_max_ua); 1427c5b64a99SLinus Walleij } 1428c5b64a99SLinus Walleij 1429c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL); 1430c5b64a99SLinus Walleij ab8500_chargalg_start_safety_timer(di); 1431c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1432c5b64a99SLinus Walleij init_maxim_chg_curr(di); 1433c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 1434c5b64a99SLinus Walleij di->eoc_cnt = 0; 1435c5b64a99SLinus Walleij di->maintenance_chg = false; 1436c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1437c5b64a99SLinus Walleij 1438c5b64a99SLinus Walleij break; 1439c5b64a99SLinus Walleij 1440c5b64a99SLinus Walleij case STATE_NORMAL: 1441c5b64a99SLinus Walleij handle_maxim_chg_curr(di); 1442c5b64a99SLinus Walleij if (di->charge_status == POWER_SUPPLY_STATUS_FULL && 1443c5b64a99SLinus Walleij di->maintenance_chg) { 1444d72ce7d3SLinus Walleij /* 1445d72ce7d3SLinus Walleij * The battery is fully charged, check if we support 1446d72ce7d3SLinus Walleij * maintenance charging else go back to waiting for 1447d72ce7d3SLinus Walleij * the recharge voltage limit. 1448d72ce7d3SLinus Walleij */ 1449d72ce7d3SLinus Walleij if (!power_supply_supports_maintenance_charging(bi)) 1450c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1451c5b64a99SLinus Walleij STATE_WAIT_FOR_RECHARGE_INIT); 1452c5b64a99SLinus Walleij else 1453c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1454c5b64a99SLinus Walleij STATE_MAINTENANCE_A_INIT); 1455c5b64a99SLinus Walleij } 1456c5b64a99SLinus Walleij break; 1457c5b64a99SLinus Walleij 1458c5b64a99SLinus Walleij /* This state will be used when the maintenance state is disabled */ 1459c5b64a99SLinus Walleij case STATE_WAIT_FOR_RECHARGE_INIT: 1460c5b64a99SLinus Walleij ab8500_chargalg_hold_charging(di); 1461c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE); 1462c5b64a99SLinus Walleij fallthrough; 1463c5b64a99SLinus Walleij 1464c5b64a99SLinus Walleij case STATE_WAIT_FOR_RECHARGE: 14651091ed7dSLinus Walleij if (di->batt_data.percent <= AB8500_RECHARGE_CAP) 1466c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1467c5b64a99SLinus Walleij break; 1468c5b64a99SLinus Walleij 1469c5b64a99SLinus Walleij case STATE_MAINTENANCE_A_INIT: 1470d72ce7d3SLinus Walleij mt = power_supply_get_maintenance_charging_setting(bi, 0); 1471d72ce7d3SLinus Walleij if (!mt) { 1472d72ce7d3SLinus Walleij /* No maintenance A state, go back to normal */ 1473d72ce7d3SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1474d72ce7d3SLinus Walleij power_supply_changed(di->chargalg_psy); 1475d72ce7d3SLinus Walleij break; 1476d72ce7d3SLinus Walleij } 1477c5b64a99SLinus Walleij ab8500_chargalg_stop_safety_timer(di); 1478c5b64a99SLinus Walleij ab8500_chargalg_start_maintenance_timer(di, 1479d72ce7d3SLinus Walleij mt->charge_safety_timer_minutes); 1480c5b64a99SLinus Walleij ab8500_chargalg_start_charging(di, 1481d72ce7d3SLinus Walleij mt->charge_voltage_max_uv, 1482d72ce7d3SLinus Walleij mt->charge_current_max_ua); 1483c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_MAINTENANCE_A); 1484c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1485c5b64a99SLinus Walleij fallthrough; 1486c5b64a99SLinus Walleij 1487c5b64a99SLinus Walleij case STATE_MAINTENANCE_A: 1488c5b64a99SLinus Walleij if (di->events.maintenance_timer_expired) { 1489c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1490c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT); 1491c5b64a99SLinus Walleij } 1492c5b64a99SLinus Walleij break; 1493c5b64a99SLinus Walleij 1494c5b64a99SLinus Walleij case STATE_MAINTENANCE_B_INIT: 1495d72ce7d3SLinus Walleij mt = power_supply_get_maintenance_charging_setting(bi, 1); 1496d72ce7d3SLinus Walleij if (!mt) { 1497d72ce7d3SLinus Walleij /* No maintenance B state, go back to normal */ 1498d72ce7d3SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1499d72ce7d3SLinus Walleij power_supply_changed(di->chargalg_psy); 1500d72ce7d3SLinus Walleij break; 1501d72ce7d3SLinus Walleij } 1502c5b64a99SLinus Walleij ab8500_chargalg_start_maintenance_timer(di, 1503d72ce7d3SLinus Walleij mt->charge_safety_timer_minutes); 1504c5b64a99SLinus Walleij ab8500_chargalg_start_charging(di, 1505d72ce7d3SLinus Walleij mt->charge_voltage_max_uv, 1506d72ce7d3SLinus Walleij mt->charge_current_max_ua); 1507c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_MAINTENANCE_B); 1508c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1509c5b64a99SLinus Walleij fallthrough; 1510c5b64a99SLinus Walleij 1511c5b64a99SLinus Walleij case STATE_MAINTENANCE_B: 1512c5b64a99SLinus Walleij if (di->events.maintenance_timer_expired) { 1513c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1514c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1515c5b64a99SLinus Walleij } 1516c5b64a99SLinus Walleij break; 1517c5b64a99SLinus Walleij 1518c5b64a99SLinus Walleij case STATE_TEMP_LOWHIGH_INIT: 15190e8b903bSLinus Walleij if (di->events.btemp_low) { 1520c5b64a99SLinus Walleij ab8500_chargalg_start_charging(di, 15210e8b903bSLinus Walleij bi->alert_low_temp_charge_voltage_uv, 15220e8b903bSLinus Walleij bi->alert_low_temp_charge_current_ua); 15230e8b903bSLinus Walleij } else if (di->events.btemp_high) { 15240e8b903bSLinus Walleij ab8500_chargalg_start_charging(di, 15250e8b903bSLinus Walleij bi->alert_high_temp_charge_voltage_uv, 15260e8b903bSLinus Walleij bi->alert_high_temp_charge_current_ua); 15270e8b903bSLinus Walleij } else { 1528*8652b62eSColin Ian King dev_err(di->dev, "neither low or high temp event occurred\n"); 15290e8b903bSLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 15300e8b903bSLinus Walleij break; 15310e8b903bSLinus Walleij } 1532c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1533c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 1534c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_TEMP_LOWHIGH); 1535c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1536c5b64a99SLinus Walleij fallthrough; 1537c5b64a99SLinus Walleij 1538c5b64a99SLinus Walleij case STATE_TEMP_LOWHIGH: 15390e8b903bSLinus Walleij if (!di->events.btemp_low && !di->events.btemp_high) 1540c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1541c5b64a99SLinus Walleij break; 1542c5b64a99SLinus Walleij 1543c5b64a99SLinus Walleij case STATE_WD_EXPIRED_INIT: 1544c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1545c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_WD_EXPIRED); 1546c5b64a99SLinus Walleij fallthrough; 1547c5b64a99SLinus Walleij 1548c5b64a99SLinus Walleij case STATE_WD_EXPIRED: 1549c5b64a99SLinus Walleij if (!di->events.ac_wd_expired && 1550c5b64a99SLinus Walleij !di->events.usb_wd_expired) 1551c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1552c5b64a99SLinus Walleij break; 1553c5b64a99SLinus Walleij 1554c5b64a99SLinus Walleij case STATE_TEMP_UNDEROVER_INIT: 1555c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1556c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_TEMP_UNDEROVER); 1557c5b64a99SLinus Walleij fallthrough; 1558c5b64a99SLinus Walleij 1559c5b64a99SLinus Walleij case STATE_TEMP_UNDEROVER: 1560c5b64a99SLinus Walleij if (!di->events.btemp_underover) 1561c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1562c5b64a99SLinus Walleij break; 1563c5b64a99SLinus Walleij } 1564c5b64a99SLinus Walleij 1565c5b64a99SLinus Walleij /* Start charging directly if the new state is a charge state */ 1566c5b64a99SLinus Walleij if (di->charge_state == STATE_NORMAL_INIT || 1567c5b64a99SLinus Walleij di->charge_state == STATE_MAINTENANCE_A_INIT || 1568c5b64a99SLinus Walleij di->charge_state == STATE_MAINTENANCE_B_INIT) 1569c5b64a99SLinus Walleij queue_work(di->chargalg_wq, &di->chargalg_work); 1570c5b64a99SLinus Walleij } 1571c5b64a99SLinus Walleij 1572c5b64a99SLinus Walleij /** 1573c5b64a99SLinus Walleij * ab8500_chargalg_periodic_work() - Periodic work for the algorithm 1574c5b64a99SLinus Walleij * @work: pointer to the work_struct structure 1575c5b64a99SLinus Walleij * 1576c5b64a99SLinus Walleij * Work queue function for the charging algorithm 1577c5b64a99SLinus Walleij */ 1578c5b64a99SLinus Walleij static void ab8500_chargalg_periodic_work(struct work_struct *work) 1579c5b64a99SLinus Walleij { 1580c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(work, 1581c5b64a99SLinus Walleij struct ab8500_chargalg, chargalg_periodic_work.work); 1582c5b64a99SLinus Walleij 1583c5b64a99SLinus Walleij ab8500_chargalg_algorithm(di); 1584c5b64a99SLinus Walleij 1585c5b64a99SLinus Walleij /* 1586c5b64a99SLinus Walleij * If a charger is connected then the battery has to be monitored 1587c5b64a99SLinus Walleij * frequently, else the work can be delayed. 1588c5b64a99SLinus Walleij */ 1589c5b64a99SLinus Walleij if (di->chg_info.conn_chg) 1590c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1591c5b64a99SLinus Walleij &di->chargalg_periodic_work, 1592c5b64a99SLinus Walleij di->bm->interval_charging * HZ); 1593c5b64a99SLinus Walleij else 1594c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1595c5b64a99SLinus Walleij &di->chargalg_periodic_work, 1596c5b64a99SLinus Walleij di->bm->interval_not_charging * HZ); 1597c5b64a99SLinus Walleij } 1598c5b64a99SLinus Walleij 1599c5b64a99SLinus Walleij /** 1600c5b64a99SLinus Walleij * ab8500_chargalg_wd_work() - periodic work to kick the charger watchdog 1601c5b64a99SLinus Walleij * @work: pointer to the work_struct structure 1602c5b64a99SLinus Walleij * 1603c5b64a99SLinus Walleij * Work queue function for kicking the charger watchdog 1604c5b64a99SLinus Walleij */ 1605c5b64a99SLinus Walleij static void ab8500_chargalg_wd_work(struct work_struct *work) 1606c5b64a99SLinus Walleij { 1607c5b64a99SLinus Walleij int ret; 1608c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(work, 1609c5b64a99SLinus Walleij struct ab8500_chargalg, chargalg_wd_work.work); 1610c5b64a99SLinus Walleij 1611c5b64a99SLinus Walleij ret = ab8500_chargalg_kick_watchdog(di); 1612c5b64a99SLinus Walleij if (ret < 0) 1613c5b64a99SLinus Walleij dev_err(di->dev, "failed to kick watchdog\n"); 1614c5b64a99SLinus Walleij 1615c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1616c5b64a99SLinus Walleij &di->chargalg_wd_work, CHG_WD_INTERVAL); 1617c5b64a99SLinus Walleij } 1618c5b64a99SLinus Walleij 1619c5b64a99SLinus Walleij /** 1620c5b64a99SLinus Walleij * ab8500_chargalg_work() - Work to run the charging algorithm instantly 1621c5b64a99SLinus Walleij * @work: pointer to the work_struct structure 1622c5b64a99SLinus Walleij * 1623c5b64a99SLinus Walleij * Work queue function for calling the charging algorithm 1624c5b64a99SLinus Walleij */ 1625c5b64a99SLinus Walleij static void ab8500_chargalg_work(struct work_struct *work) 1626c5b64a99SLinus Walleij { 1627c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(work, 1628c5b64a99SLinus Walleij struct ab8500_chargalg, chargalg_work); 1629c5b64a99SLinus Walleij 1630c5b64a99SLinus Walleij ab8500_chargalg_algorithm(di); 1631c5b64a99SLinus Walleij } 1632c5b64a99SLinus Walleij 1633c5b64a99SLinus Walleij /** 1634c5b64a99SLinus Walleij * ab8500_chargalg_get_property() - get the chargalg properties 1635c5b64a99SLinus Walleij * @psy: pointer to the power_supply structure 1636c5b64a99SLinus Walleij * @psp: pointer to the power_supply_property structure 1637c5b64a99SLinus Walleij * @val: pointer to the power_supply_propval union 1638c5b64a99SLinus Walleij * 1639c5b64a99SLinus Walleij * This function gets called when an application tries to get the 1640c5b64a99SLinus Walleij * chargalg properties by reading the sysfs files. 1641c5b64a99SLinus Walleij * status: charging/discharging/full/unknown 1642c5b64a99SLinus Walleij * health: health of the battery 1643c5b64a99SLinus Walleij * Returns error code in case of failure else 0 on success 1644c5b64a99SLinus Walleij */ 1645c5b64a99SLinus Walleij static int ab8500_chargalg_get_property(struct power_supply *psy, 1646c5b64a99SLinus Walleij enum power_supply_property psp, 1647c5b64a99SLinus Walleij union power_supply_propval *val) 1648c5b64a99SLinus Walleij { 1649c5b64a99SLinus Walleij struct ab8500_chargalg *di = power_supply_get_drvdata(psy); 1650c5b64a99SLinus Walleij 1651c5b64a99SLinus Walleij switch (psp) { 1652c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_STATUS: 1653c5b64a99SLinus Walleij val->intval = di->charge_status; 1654c5b64a99SLinus Walleij break; 1655c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_HEALTH: 1656c5b64a99SLinus Walleij if (di->events.batt_ovv) { 1657c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; 1658c5b64a99SLinus Walleij } else if (di->events.btemp_underover) { 165925fd3303SLinus Walleij if (di->batt_data.temp <= di->bm->bi->temp_min) 1660c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_COLD; 1661c5b64a99SLinus Walleij else 1662c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; 1663c5b64a99SLinus Walleij } else if (di->charge_state == STATE_SAFETY_TIMER_EXPIRED || 1664c5b64a99SLinus Walleij di->charge_state == STATE_SAFETY_TIMER_EXPIRED_INIT) { 1665c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; 1666c5b64a99SLinus Walleij } else { 1667c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_GOOD; 1668c5b64a99SLinus Walleij } 1669c5b64a99SLinus Walleij break; 1670c5b64a99SLinus Walleij default: 1671c5b64a99SLinus Walleij return -EINVAL; 1672c5b64a99SLinus Walleij } 1673c5b64a99SLinus Walleij return 0; 1674c5b64a99SLinus Walleij } 1675c5b64a99SLinus Walleij 1676c5b64a99SLinus Walleij static int __maybe_unused ab8500_chargalg_resume(struct device *dev) 1677c5b64a99SLinus Walleij { 1678c5b64a99SLinus Walleij struct ab8500_chargalg *di = dev_get_drvdata(dev); 1679c5b64a99SLinus Walleij 1680c5b64a99SLinus Walleij /* Kick charger watchdog if charging (any charger online) */ 1681c5b64a99SLinus Walleij if (di->chg_info.online_chg) 1682c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0); 1683c5b64a99SLinus Walleij 1684c5b64a99SLinus Walleij /* 1685c5b64a99SLinus Walleij * Run the charging algorithm directly to be sure we don't 1686c5b64a99SLinus Walleij * do it too seldom 1687c5b64a99SLinus Walleij */ 1688c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); 1689c5b64a99SLinus Walleij 1690c5b64a99SLinus Walleij return 0; 1691c5b64a99SLinus Walleij } 1692c5b64a99SLinus Walleij 1693c5b64a99SLinus Walleij static int __maybe_unused ab8500_chargalg_suspend(struct device *dev) 1694c5b64a99SLinus Walleij { 1695c5b64a99SLinus Walleij struct ab8500_chargalg *di = dev_get_drvdata(dev); 1696c5b64a99SLinus Walleij 1697c5b64a99SLinus Walleij if (di->chg_info.online_chg) 1698c5b64a99SLinus Walleij cancel_delayed_work_sync(&di->chargalg_wd_work); 1699c5b64a99SLinus Walleij 1700c5b64a99SLinus Walleij cancel_delayed_work_sync(&di->chargalg_periodic_work); 1701c5b64a99SLinus Walleij 1702c5b64a99SLinus Walleij return 0; 1703c5b64a99SLinus Walleij } 1704c5b64a99SLinus Walleij 1705c5b64a99SLinus Walleij static char *supply_interface[] = { 1706c5b64a99SLinus Walleij "ab8500_fg", 1707c5b64a99SLinus Walleij }; 1708c5b64a99SLinus Walleij 1709c5b64a99SLinus Walleij static const struct power_supply_desc ab8500_chargalg_desc = { 1710661d10eeSLinus Walleij .name = "ab8500_chargalg", 1711c5b64a99SLinus Walleij .type = POWER_SUPPLY_TYPE_BATTERY, 1712c5b64a99SLinus Walleij .properties = ab8500_chargalg_props, 1713c5b64a99SLinus Walleij .num_properties = ARRAY_SIZE(ab8500_chargalg_props), 1714c5b64a99SLinus Walleij .get_property = ab8500_chargalg_get_property, 1715c5b64a99SLinus Walleij .external_power_changed = ab8500_chargalg_external_power_changed, 1716c5b64a99SLinus Walleij }; 1717c5b64a99SLinus Walleij 1718c5b64a99SLinus Walleij static int ab8500_chargalg_bind(struct device *dev, struct device *master, 1719c5b64a99SLinus Walleij void *data) 1720c5b64a99SLinus Walleij { 1721c5b64a99SLinus Walleij struct ab8500_chargalg *di = dev_get_drvdata(dev); 1722c5b64a99SLinus Walleij 1723c5b64a99SLinus Walleij /* Create a work queue for the chargalg */ 1724c5b64a99SLinus Walleij di->chargalg_wq = alloc_ordered_workqueue("ab8500_chargalg_wq", 1725c5b64a99SLinus Walleij WQ_MEM_RECLAIM); 1726c5b64a99SLinus Walleij if (di->chargalg_wq == NULL) { 1727c5b64a99SLinus Walleij dev_err(di->dev, "failed to create work queue\n"); 1728c5b64a99SLinus Walleij return -ENOMEM; 1729c5b64a99SLinus Walleij } 1730c5b64a99SLinus Walleij 1731c5b64a99SLinus Walleij /* Run the charging algorithm */ 1732c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); 1733c5b64a99SLinus Walleij 1734c5b64a99SLinus Walleij return 0; 1735c5b64a99SLinus Walleij } 1736c5b64a99SLinus Walleij 1737c5b64a99SLinus Walleij static void ab8500_chargalg_unbind(struct device *dev, struct device *master, 1738c5b64a99SLinus Walleij void *data) 1739c5b64a99SLinus Walleij { 1740c5b64a99SLinus Walleij struct ab8500_chargalg *di = dev_get_drvdata(dev); 1741c5b64a99SLinus Walleij 1742c5b64a99SLinus Walleij /* Stop all timers and work */ 1743c5b64a99SLinus Walleij hrtimer_cancel(&di->safety_timer); 1744c5b64a99SLinus Walleij hrtimer_cancel(&di->maintenance_timer); 1745c5b64a99SLinus Walleij 1746c5b64a99SLinus Walleij cancel_delayed_work_sync(&di->chargalg_periodic_work); 1747c5b64a99SLinus Walleij cancel_delayed_work_sync(&di->chargalg_wd_work); 1748c5b64a99SLinus Walleij cancel_work_sync(&di->chargalg_work); 1749c5b64a99SLinus Walleij 1750c5b64a99SLinus Walleij /* Delete the work queue */ 1751c5b64a99SLinus Walleij destroy_workqueue(di->chargalg_wq); 1752c5b64a99SLinus Walleij flush_scheduled_work(); 1753c5b64a99SLinus Walleij } 1754c5b64a99SLinus Walleij 1755c5b64a99SLinus Walleij static const struct component_ops ab8500_chargalg_component_ops = { 1756c5b64a99SLinus Walleij .bind = ab8500_chargalg_bind, 1757c5b64a99SLinus Walleij .unbind = ab8500_chargalg_unbind, 1758c5b64a99SLinus Walleij }; 1759c5b64a99SLinus Walleij 1760c5b64a99SLinus Walleij static int ab8500_chargalg_probe(struct platform_device *pdev) 1761c5b64a99SLinus Walleij { 1762c5b64a99SLinus Walleij struct device *dev = &pdev->dev; 1763c5b64a99SLinus Walleij struct power_supply_config psy_cfg = {}; 1764c5b64a99SLinus Walleij struct ab8500_chargalg *di; 1765c5b64a99SLinus Walleij 1766c5b64a99SLinus Walleij di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); 1767c5b64a99SLinus Walleij if (!di) 1768c5b64a99SLinus Walleij return -ENOMEM; 1769c5b64a99SLinus Walleij 1770c5b64a99SLinus Walleij di->bm = &ab8500_bm_data; 1771c5b64a99SLinus Walleij 1772c5b64a99SLinus Walleij /* get device struct and parent */ 1773c5b64a99SLinus Walleij di->dev = dev; 1774c5b64a99SLinus Walleij di->parent = dev_get_drvdata(pdev->dev.parent); 1775c5b64a99SLinus Walleij 1776c5b64a99SLinus Walleij psy_cfg.supplied_to = supply_interface; 1777c5b64a99SLinus Walleij psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); 1778c5b64a99SLinus Walleij psy_cfg.drv_data = di; 1779c5b64a99SLinus Walleij 1780c5b64a99SLinus Walleij /* Initilialize safety timer */ 1781c5b64a99SLinus Walleij hrtimer_init(&di->safety_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); 1782c5b64a99SLinus Walleij di->safety_timer.function = ab8500_chargalg_safety_timer_expired; 1783c5b64a99SLinus Walleij 1784c5b64a99SLinus Walleij /* Initilialize maintenance timer */ 1785c5b64a99SLinus Walleij hrtimer_init(&di->maintenance_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); 1786c5b64a99SLinus Walleij di->maintenance_timer.function = 1787c5b64a99SLinus Walleij ab8500_chargalg_maintenance_timer_expired; 1788c5b64a99SLinus Walleij 1789c5b64a99SLinus Walleij /* Init work for chargalg */ 1790c5b64a99SLinus Walleij INIT_DEFERRABLE_WORK(&di->chargalg_periodic_work, 1791c5b64a99SLinus Walleij ab8500_chargalg_periodic_work); 1792c5b64a99SLinus Walleij INIT_DEFERRABLE_WORK(&di->chargalg_wd_work, 1793c5b64a99SLinus Walleij ab8500_chargalg_wd_work); 1794c5b64a99SLinus Walleij 1795c5b64a99SLinus Walleij /* Init work for chargalg */ 1796c5b64a99SLinus Walleij INIT_WORK(&di->chargalg_work, ab8500_chargalg_work); 1797c5b64a99SLinus Walleij 1798c5b64a99SLinus Walleij /* To detect charger at startup */ 1799c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = -1; 1800c5b64a99SLinus Walleij 1801c5b64a99SLinus Walleij /* Register chargalg power supply class */ 1802c5b64a99SLinus Walleij di->chargalg_psy = devm_power_supply_register(di->dev, 1803c5b64a99SLinus Walleij &ab8500_chargalg_desc, 1804c5b64a99SLinus Walleij &psy_cfg); 1805c5b64a99SLinus Walleij if (IS_ERR(di->chargalg_psy)) { 1806c5b64a99SLinus Walleij dev_err(di->dev, "failed to register chargalg psy\n"); 1807c5b64a99SLinus Walleij return PTR_ERR(di->chargalg_psy); 1808c5b64a99SLinus Walleij } 1809c5b64a99SLinus Walleij 1810c5b64a99SLinus Walleij platform_set_drvdata(pdev, di); 1811c5b64a99SLinus Walleij 1812c5b64a99SLinus Walleij dev_info(di->dev, "probe success\n"); 1813c5b64a99SLinus Walleij return component_add(dev, &ab8500_chargalg_component_ops); 1814c5b64a99SLinus Walleij } 1815c5b64a99SLinus Walleij 1816c5b64a99SLinus Walleij static int ab8500_chargalg_remove(struct platform_device *pdev) 1817c5b64a99SLinus Walleij { 1818c5b64a99SLinus Walleij component_del(&pdev->dev, &ab8500_chargalg_component_ops); 1819c5b64a99SLinus Walleij 1820c5b64a99SLinus Walleij return 0; 1821c5b64a99SLinus Walleij } 1822c5b64a99SLinus Walleij 1823c5b64a99SLinus Walleij static SIMPLE_DEV_PM_OPS(ab8500_chargalg_pm_ops, ab8500_chargalg_suspend, ab8500_chargalg_resume); 1824c5b64a99SLinus Walleij 1825c5b64a99SLinus Walleij static const struct of_device_id ab8500_chargalg_match[] = { 1826c5b64a99SLinus Walleij { .compatible = "stericsson,ab8500-chargalg", }, 1827c5b64a99SLinus Walleij { }, 1828c5b64a99SLinus Walleij }; 1829c5b64a99SLinus Walleij 1830c5b64a99SLinus Walleij struct platform_driver ab8500_chargalg_driver = { 1831c5b64a99SLinus Walleij .probe = ab8500_chargalg_probe, 1832c5b64a99SLinus Walleij .remove = ab8500_chargalg_remove, 1833c5b64a99SLinus Walleij .driver = { 1834c5b64a99SLinus Walleij .name = "ab8500_chargalg", 1835c5b64a99SLinus Walleij .of_match_table = ab8500_chargalg_match, 1836c5b64a99SLinus Walleij .pm = &ab8500_chargalg_pm_ops, 1837c5b64a99SLinus Walleij }, 1838c5b64a99SLinus Walleij }; 1839c5b64a99SLinus Walleij MODULE_LICENSE("GPL v2"); 1840c5b64a99SLinus Walleij MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); 1841c5b64a99SLinus Walleij MODULE_ALIAS("platform:ab8500-chargalg"); 1842c5b64a99SLinus Walleij MODULE_DESCRIPTION("ab8500 battery charging algorithm"); 1843