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189a2aaef9
cpp_check reports
[drivers/power/supply/ab8500_chargalg.c:493]: (style) Variable 'ab8500_chargalg_ex_ac_enable_toggle' is assigned a value that is never used.
From inspection, this variable is never used. So remove it.
Fixes: 6c50a08d9d
("power: supply: ab8500: Drop external charger leftovers")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Chen Lifu <chenlifu@huawei.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
1854 lines
53 KiB
C
1854 lines
53 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) ST-Ericsson SA 2012
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* Copyright (c) 2012 Sony Mobile Communications AB
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*
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* Charging algorithm driver for AB8500
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*
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* Authors:
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* Johan Palsson <johan.palsson@stericsson.com>
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* Karl Komierowski <karl.komierowski@stericsson.com>
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* Arun R Murthy <arun.murthy@stericsson.com>
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* Author: Imre Sunyi <imre.sunyi@sonymobile.com>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/component.h>
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#include <linux/hrtimer.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/completion.h>
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#include <linux/workqueue.h>
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#include <linux/kobject.h>
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#include <linux/of.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/abx500.h>
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/notifier.h>
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#include "ab8500-bm.h"
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#include "ab8500-chargalg.h"
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/* Watchdog kick interval */
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#define CHG_WD_INTERVAL (6 * HZ)
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/* End-of-charge criteria counter */
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#define EOC_COND_CNT 10
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/* One hour expressed in seconds */
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#define ONE_HOUR_IN_SECONDS 3600
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/* Five minutes expressed in seconds */
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#define FIVE_MINUTES_IN_SECONDS 300
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/*
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* This is the battery capacity limit that will trigger a new
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* full charging cycle in the case where maintenance charging
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* has been disabled
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*/
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#define AB8500_RECHARGE_CAP 95
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enum ab8500_chargers {
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NO_CHG,
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AC_CHG,
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USB_CHG,
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};
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struct ab8500_chargalg_charger_info {
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enum ab8500_chargers conn_chg;
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enum ab8500_chargers prev_conn_chg;
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enum ab8500_chargers online_chg;
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enum ab8500_chargers prev_online_chg;
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enum ab8500_chargers charger_type;
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bool usb_chg_ok;
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bool ac_chg_ok;
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int usb_volt_uv;
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int usb_curr_ua;
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int ac_volt_uv;
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int ac_curr_ua;
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int usb_vset_uv;
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int usb_iset_ua;
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int ac_vset_uv;
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int ac_iset_ua;
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};
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struct ab8500_chargalg_battery_data {
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int temp;
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int volt_uv;
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int avg_curr_ua;
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int inst_curr_ua;
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int percent;
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};
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enum ab8500_chargalg_states {
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STATE_HANDHELD_INIT,
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STATE_HANDHELD,
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STATE_CHG_NOT_OK_INIT,
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STATE_CHG_NOT_OK,
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STATE_HW_TEMP_PROTECT_INIT,
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STATE_HW_TEMP_PROTECT,
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STATE_NORMAL_INIT,
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STATE_NORMAL,
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STATE_WAIT_FOR_RECHARGE_INIT,
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STATE_WAIT_FOR_RECHARGE,
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STATE_MAINTENANCE_A_INIT,
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STATE_MAINTENANCE_A,
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STATE_MAINTENANCE_B_INIT,
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STATE_MAINTENANCE_B,
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STATE_TEMP_UNDEROVER_INIT,
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STATE_TEMP_UNDEROVER,
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STATE_TEMP_LOWHIGH_INIT,
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STATE_TEMP_LOWHIGH,
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STATE_OVV_PROTECT_INIT,
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STATE_OVV_PROTECT,
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STATE_SAFETY_TIMER_EXPIRED_INIT,
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STATE_SAFETY_TIMER_EXPIRED,
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STATE_BATT_REMOVED_INIT,
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STATE_BATT_REMOVED,
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STATE_WD_EXPIRED_INIT,
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STATE_WD_EXPIRED,
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};
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static const char * const states[] = {
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"HANDHELD_INIT",
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"HANDHELD",
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"CHG_NOT_OK_INIT",
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"CHG_NOT_OK",
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"HW_TEMP_PROTECT_INIT",
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"HW_TEMP_PROTECT",
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"NORMAL_INIT",
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"NORMAL",
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"WAIT_FOR_RECHARGE_INIT",
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"WAIT_FOR_RECHARGE",
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"MAINTENANCE_A_INIT",
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"MAINTENANCE_A",
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"MAINTENANCE_B_INIT",
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"MAINTENANCE_B",
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"TEMP_UNDEROVER_INIT",
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"TEMP_UNDEROVER",
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"TEMP_LOWHIGH_INIT",
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"TEMP_LOWHIGH",
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"OVV_PROTECT_INIT",
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"OVV_PROTECT",
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"SAFETY_TIMER_EXPIRED_INIT",
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"SAFETY_TIMER_EXPIRED",
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"BATT_REMOVED_INIT",
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"BATT_REMOVED",
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"WD_EXPIRED_INIT",
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"WD_EXPIRED",
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};
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struct ab8500_chargalg_events {
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bool batt_unknown;
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bool mainextchnotok;
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bool batt_ovv;
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bool batt_rem;
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bool btemp_underover;
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bool btemp_low;
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bool btemp_high;
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bool main_thermal_prot;
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bool usb_thermal_prot;
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bool main_ovv;
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bool vbus_ovv;
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bool usbchargernotok;
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bool safety_timer_expired;
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bool maintenance_timer_expired;
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bool ac_wd_expired;
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bool usb_wd_expired;
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bool ac_cv_active;
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bool usb_cv_active;
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bool vbus_collapsed;
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};
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/**
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* struct ab8500_charge_curr_maximization - Charger maximization parameters
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* @original_iset_ua: the non optimized/maximised charger current
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* @current_iset_ua: the charging current used at this moment
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* @condition_cnt: number of iterations needed before a new charger current
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is set
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* @max_current_ua: maximum charger current
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* @wait_cnt: to avoid too fast current step down in case of charger
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* voltage collapse, we insert this delay between step
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* down
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* @level: tells in how many steps the charging current has been
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increased
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*/
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struct ab8500_charge_curr_maximization {
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int original_iset_ua;
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int current_iset_ua;
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int condition_cnt;
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int max_current_ua;
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int wait_cnt;
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u8 level;
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};
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enum maxim_ret {
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MAXIM_RET_NOACTION,
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MAXIM_RET_CHANGE,
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MAXIM_RET_IBAT_TOO_HIGH,
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};
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/**
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* struct ab8500_chargalg - ab8500 Charging algorithm device information
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* @dev: pointer to the structure device
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* @charge_status: battery operating status
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* @eoc_cnt: counter used to determine end-of_charge
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* @maintenance_chg: indicate if maintenance charge is active
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* @t_hyst_norm temperature hysteresis when the temperature has been
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* over or under normal limits
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* @t_hyst_lowhigh temperature hysteresis when the temperature has been
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* over or under the high or low limits
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* @charge_state: current state of the charging algorithm
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* @ccm charging current maximization parameters
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* @chg_info: information about connected charger types
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* @batt_data: data of the battery
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* @bm: Platform specific battery management information
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* @parent: pointer to the struct ab8500
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* @chargalg_psy: structure that holds the battery properties exposed by
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* the charging algorithm
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* @events: structure for information about events triggered
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* @chargalg_wq: work queue for running the charging algorithm
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* @chargalg_periodic_work: work to run the charging algorithm periodically
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* @chargalg_wd_work: work to kick the charger watchdog periodically
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* @chargalg_work: work to run the charging algorithm instantly
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* @safety_timer: charging safety timer
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* @maintenance_timer: maintenance charging timer
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* @chargalg_kobject: structure of type kobject
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*/
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struct ab8500_chargalg {
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struct device *dev;
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int charge_status;
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int eoc_cnt;
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bool maintenance_chg;
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int t_hyst_norm;
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int t_hyst_lowhigh;
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enum ab8500_chargalg_states charge_state;
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struct ab8500_charge_curr_maximization ccm;
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struct ab8500_chargalg_charger_info chg_info;
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struct ab8500_chargalg_battery_data batt_data;
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struct ab8500 *parent;
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struct ab8500_bm_data *bm;
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struct power_supply *chargalg_psy;
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struct ux500_charger *ac_chg;
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struct ux500_charger *usb_chg;
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struct ab8500_chargalg_events events;
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struct workqueue_struct *chargalg_wq;
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struct delayed_work chargalg_periodic_work;
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struct delayed_work chargalg_wd_work;
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struct work_struct chargalg_work;
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struct hrtimer safety_timer;
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struct hrtimer maintenance_timer;
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struct kobject chargalg_kobject;
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};
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/* Main battery properties */
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static enum power_supply_property ab8500_chargalg_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_HEALTH,
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};
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/**
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* ab8500_chargalg_safety_timer_expired() - Expiration of the safety timer
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* @timer: pointer to the hrtimer structure
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*
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* This function gets called when the safety timer for the charger
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* expires
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*/
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static enum hrtimer_restart
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ab8500_chargalg_safety_timer_expired(struct hrtimer *timer)
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{
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struct ab8500_chargalg *di = container_of(timer, struct ab8500_chargalg,
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safety_timer);
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dev_err(di->dev, "Safety timer expired\n");
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di->events.safety_timer_expired = true;
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/* Trigger execution of the algorithm instantly */
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queue_work(di->chargalg_wq, &di->chargalg_work);
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return HRTIMER_NORESTART;
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}
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/**
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* ab8500_chargalg_maintenance_timer_expired() - Expiration of
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* the maintenance timer
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* @timer: pointer to the timer structure
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*
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* This function gets called when the maintenance timer
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* expires
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*/
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static enum hrtimer_restart
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ab8500_chargalg_maintenance_timer_expired(struct hrtimer *timer)
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{
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struct ab8500_chargalg *di = container_of(timer, struct ab8500_chargalg,
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maintenance_timer);
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dev_dbg(di->dev, "Maintenance timer expired\n");
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di->events.maintenance_timer_expired = true;
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/* Trigger execution of the algorithm instantly */
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queue_work(di->chargalg_wq, &di->chargalg_work);
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return HRTIMER_NORESTART;
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}
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/**
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* ab8500_chargalg_state_to() - Change charge state
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* @di: pointer to the ab8500_chargalg structure
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*
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* This function gets called when a charge state change should occur
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*/
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static void ab8500_chargalg_state_to(struct ab8500_chargalg *di,
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enum ab8500_chargalg_states state)
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{
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dev_dbg(di->dev,
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"State changed: %s (From state: [%d] %s =to=> [%d] %s )\n",
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di->charge_state == state ? "NO" : "YES",
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di->charge_state,
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states[di->charge_state],
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state,
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states[state]);
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di->charge_state = state;
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}
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static int ab8500_chargalg_check_charger_enable(struct ab8500_chargalg *di)
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{
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struct power_supply_battery_info *bi = di->bm->bi;
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switch (di->charge_state) {
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case STATE_NORMAL:
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case STATE_MAINTENANCE_A:
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case STATE_MAINTENANCE_B:
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break;
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default:
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return 0;
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}
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if (di->chg_info.charger_type & USB_CHG) {
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return di->usb_chg->ops.check_enable(di->usb_chg,
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bi->constant_charge_voltage_max_uv,
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bi->constant_charge_current_max_ua);
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} else if (di->chg_info.charger_type & AC_CHG) {
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return di->ac_chg->ops.check_enable(di->ac_chg,
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bi->constant_charge_voltage_max_uv,
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bi->constant_charge_current_max_ua);
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}
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return 0;
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}
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/**
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* ab8500_chargalg_check_charger_connection() - Check charger connection change
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* @di: pointer to the ab8500_chargalg structure
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*
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* This function will check if there is a change in the charger connection
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* and change charge state accordingly. AC has precedence over USB.
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*/
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static int ab8500_chargalg_check_charger_connection(struct ab8500_chargalg *di)
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{
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if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg) {
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/* Charger state changed since last update */
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if (di->chg_info.conn_chg & AC_CHG) {
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dev_info(di->dev, "Charging source is AC\n");
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if (di->chg_info.charger_type != AC_CHG) {
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di->chg_info.charger_type = AC_CHG;
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ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
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}
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} else if (di->chg_info.conn_chg & USB_CHG) {
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dev_info(di->dev, "Charging source is USB\n");
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di->chg_info.charger_type = USB_CHG;
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ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
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} else {
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dev_dbg(di->dev, "Charging source is OFF\n");
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di->chg_info.charger_type = NO_CHG;
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ab8500_chargalg_state_to(di, STATE_HANDHELD_INIT);
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}
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di->chg_info.prev_conn_chg = di->chg_info.conn_chg;
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}
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return di->chg_info.conn_chg;
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}
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/**
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* ab8500_chargalg_start_safety_timer() - Start charging safety timer
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* @di: pointer to the ab8500_chargalg structure
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*
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* The safety timer is used to avoid overcharging of old or bad batteries.
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* There are different timers for AC and USB
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*/
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static void ab8500_chargalg_start_safety_timer(struct ab8500_chargalg *di)
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{
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/* Charger-dependent expiration time in hours*/
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int timer_expiration = 0;
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switch (di->chg_info.charger_type) {
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case AC_CHG:
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timer_expiration = di->bm->main_safety_tmr_h;
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break;
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case USB_CHG:
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timer_expiration = di->bm->usb_safety_tmr_h;
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break;
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default:
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dev_err(di->dev, "Unknown charger to charge from\n");
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break;
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}
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di->events.safety_timer_expired = false;
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hrtimer_set_expires_range(&di->safety_timer,
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ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0),
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ktime_set(FIVE_MINUTES_IN_SECONDS, 0));
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hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL);
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}
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/**
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* ab8500_chargalg_stop_safety_timer() - Stop charging safety timer
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* @di: pointer to the ab8500_chargalg structure
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*
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* The safety timer is stopped whenever the NORMAL state is exited
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*/
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static void ab8500_chargalg_stop_safety_timer(struct ab8500_chargalg *di)
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{
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if (hrtimer_try_to_cancel(&di->safety_timer) >= 0)
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di->events.safety_timer_expired = false;
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}
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/**
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* ab8500_chargalg_start_maintenance_timer() - Start charging maintenance timer
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* @di: pointer to the ab8500_chargalg structure
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* @duration: duration of the maintenance timer in minutes
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*
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* The maintenance timer is used to maintain the charge in the battery once
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* the battery is considered full. These timers are chosen to match the
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* discharge curve of the battery
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*/
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static void ab8500_chargalg_start_maintenance_timer(struct ab8500_chargalg *di,
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int duration)
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{
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/* Set a timer in minutes with a 30 second range */
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hrtimer_set_expires_range(&di->maintenance_timer,
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ktime_set(duration * 60, 0),
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ktime_set(30, 0));
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di->events.maintenance_timer_expired = false;
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hrtimer_start_expires(&di->maintenance_timer, HRTIMER_MODE_REL);
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}
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/**
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* ab8500_chargalg_stop_maintenance_timer() - Stop maintenance timer
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* @di: pointer to the ab8500_chargalg structure
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*
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* The maintenance timer is stopped whenever maintenance ends or when another
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* state is entered
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*/
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static void ab8500_chargalg_stop_maintenance_timer(struct ab8500_chargalg *di)
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{
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if (hrtimer_try_to_cancel(&di->maintenance_timer) >= 0)
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di->events.maintenance_timer_expired = false;
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}
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/**
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* ab8500_chargalg_kick_watchdog() - Kick charger watchdog
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* @di: pointer to the ab8500_chargalg structure
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*
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* The charger watchdog have to be kicked periodically whenever the charger is
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* on, else the ABB will reset the system
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*/
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static int ab8500_chargalg_kick_watchdog(struct ab8500_chargalg *di)
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{
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/* Check if charger exists and kick watchdog if charging */
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if (di->ac_chg && di->ac_chg->ops.kick_wd &&
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di->chg_info.online_chg & AC_CHG) {
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return di->ac_chg->ops.kick_wd(di->ac_chg);
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} else if (di->usb_chg && di->usb_chg->ops.kick_wd &&
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di->chg_info.online_chg & USB_CHG)
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|
return di->usb_chg->ops.kick_wd(di->usb_chg);
|
|
|
|
return -ENXIO;
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_ac_en() - Turn on/off the AC charger
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
* @enable: charger on/off
|
|
* @vset_uv: requested charger output voltage in microvolt
|
|
* @iset_ua: requested charger output current in microampere
|
|
*
|
|
* The AC charger will be turned on/off with the requested charge voltage and
|
|
* current
|
|
*/
|
|
static int ab8500_chargalg_ac_en(struct ab8500_chargalg *di, int enable,
|
|
int vset_uv, int iset_ua)
|
|
{
|
|
if (!di->ac_chg || !di->ac_chg->ops.enable)
|
|
return -ENXIO;
|
|
|
|
/* Select maximum of what both the charger and the battery supports */
|
|
if (di->ac_chg->max_out_volt_uv)
|
|
vset_uv = min(vset_uv, di->ac_chg->max_out_volt_uv);
|
|
if (di->ac_chg->max_out_curr_ua)
|
|
iset_ua = min(iset_ua, di->ac_chg->max_out_curr_ua);
|
|
|
|
di->chg_info.ac_iset_ua = iset_ua;
|
|
di->chg_info.ac_vset_uv = vset_uv;
|
|
|
|
return di->ac_chg->ops.enable(di->ac_chg, enable, vset_uv, iset_ua);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_usb_en() - Turn on/off the USB charger
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
* @enable: charger on/off
|
|
* @vset_uv: requested charger output voltage in microvolt
|
|
* @iset_ua: requested charger output current in microampere
|
|
*
|
|
* The USB charger will be turned on/off with the requested charge voltage and
|
|
* current
|
|
*/
|
|
static int ab8500_chargalg_usb_en(struct ab8500_chargalg *di, int enable,
|
|
int vset_uv, int iset_ua)
|
|
{
|
|
if (!di->usb_chg || !di->usb_chg->ops.enable)
|
|
return -ENXIO;
|
|
|
|
/* Select maximum of what both the charger and the battery supports */
|
|
if (di->usb_chg->max_out_volt_uv)
|
|
vset_uv = min(vset_uv, di->usb_chg->max_out_volt_uv);
|
|
if (di->usb_chg->max_out_curr_ua)
|
|
iset_ua = min(iset_ua, di->usb_chg->max_out_curr_ua);
|
|
|
|
di->chg_info.usb_iset_ua = iset_ua;
|
|
di->chg_info.usb_vset_uv = vset_uv;
|
|
|
|
return di->usb_chg->ops.enable(di->usb_chg, enable, vset_uv, iset_ua);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_update_chg_curr() - Update charger current
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
* @iset_ua: requested charger output current in microampere
|
|
*
|
|
* The charger output current will be updated for the charger
|
|
* that is currently in use
|
|
*/
|
|
static int ab8500_chargalg_update_chg_curr(struct ab8500_chargalg *di,
|
|
int iset_ua)
|
|
{
|
|
/* Check if charger exists and update current if charging */
|
|
if (di->ac_chg && di->ac_chg->ops.update_curr &&
|
|
di->chg_info.charger_type & AC_CHG) {
|
|
/*
|
|
* Select maximum of what both the charger
|
|
* and the battery supports
|
|
*/
|
|
if (di->ac_chg->max_out_curr_ua)
|
|
iset_ua = min(iset_ua, di->ac_chg->max_out_curr_ua);
|
|
|
|
di->chg_info.ac_iset_ua = iset_ua;
|
|
|
|
return di->ac_chg->ops.update_curr(di->ac_chg, iset_ua);
|
|
} else if (di->usb_chg && di->usb_chg->ops.update_curr &&
|
|
di->chg_info.charger_type & USB_CHG) {
|
|
/*
|
|
* Select maximum of what both the charger
|
|
* and the battery supports
|
|
*/
|
|
if (di->usb_chg->max_out_curr_ua)
|
|
iset_ua = min(iset_ua, di->usb_chg->max_out_curr_ua);
|
|
|
|
di->chg_info.usb_iset_ua = iset_ua;
|
|
|
|
return di->usb_chg->ops.update_curr(di->usb_chg, iset_ua);
|
|
}
|
|
|
|
return -ENXIO;
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_stop_charging() - Stop charging
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
*
|
|
* This function is called from any state where charging should be stopped.
|
|
* All charging is disabled and all status parameters and timers are changed
|
|
* accordingly
|
|
*/
|
|
static void ab8500_chargalg_stop_charging(struct ab8500_chargalg *di)
|
|
{
|
|
ab8500_chargalg_ac_en(di, false, 0, 0);
|
|
ab8500_chargalg_usb_en(di, false, 0, 0);
|
|
ab8500_chargalg_stop_safety_timer(di);
|
|
ab8500_chargalg_stop_maintenance_timer(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
di->maintenance_chg = false;
|
|
cancel_delayed_work(&di->chargalg_wd_work);
|
|
power_supply_changed(di->chargalg_psy);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_hold_charging() - Pauses charging
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
*
|
|
* This function is called in the case where maintenance charging has been
|
|
* disabled and instead a battery voltage mode is entered to check when the
|
|
* battery voltage has reached a certain recharge voltage
|
|
*/
|
|
static void ab8500_chargalg_hold_charging(struct ab8500_chargalg *di)
|
|
{
|
|
ab8500_chargalg_ac_en(di, false, 0, 0);
|
|
ab8500_chargalg_usb_en(di, false, 0, 0);
|
|
ab8500_chargalg_stop_safety_timer(di);
|
|
ab8500_chargalg_stop_maintenance_timer(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
di->maintenance_chg = false;
|
|
cancel_delayed_work(&di->chargalg_wd_work);
|
|
power_supply_changed(di->chargalg_psy);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_start_charging() - Start the charger
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
* @vset_uv: requested charger output voltage in microvolt
|
|
* @iset_ua: requested charger output current in microampere
|
|
*
|
|
* A charger will be enabled depending on the requested charger type that was
|
|
* detected previously.
|
|
*/
|
|
static void ab8500_chargalg_start_charging(struct ab8500_chargalg *di,
|
|
int vset_uv, int iset_ua)
|
|
{
|
|
switch (di->chg_info.charger_type) {
|
|
case AC_CHG:
|
|
dev_dbg(di->dev,
|
|
"AC parameters: Vset %d, Ich %d\n", vset_uv, iset_ua);
|
|
ab8500_chargalg_usb_en(di, false, 0, 0);
|
|
ab8500_chargalg_ac_en(di, true, vset_uv, iset_ua);
|
|
break;
|
|
|
|
case USB_CHG:
|
|
dev_dbg(di->dev,
|
|
"USB parameters: Vset %d, Ich %d\n", vset_uv, iset_ua);
|
|
ab8500_chargalg_ac_en(di, false, 0, 0);
|
|
ab8500_chargalg_usb_en(di, true, vset_uv, iset_ua);
|
|
break;
|
|
|
|
default:
|
|
dev_err(di->dev, "Unknown charger to charge from\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_check_temp() - Check battery temperature ranges
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
*
|
|
* The battery temperature is checked against the predefined limits and the
|
|
* charge state is changed accordingly
|
|
*/
|
|
static void ab8500_chargalg_check_temp(struct ab8500_chargalg *di)
|
|
{
|
|
struct power_supply_battery_info *bi = di->bm->bi;
|
|
|
|
if (di->batt_data.temp > (bi->temp_alert_min + di->t_hyst_norm) &&
|
|
di->batt_data.temp < (bi->temp_alert_max - di->t_hyst_norm)) {
|
|
/* Temp OK! */
|
|
di->events.btemp_underover = false;
|
|
di->events.btemp_low = false;
|
|
di->events.btemp_high = false;
|
|
di->t_hyst_norm = 0;
|
|
di->t_hyst_lowhigh = 0;
|
|
} else {
|
|
if ((di->batt_data.temp >= bi->temp_alert_max) &&
|
|
(di->batt_data.temp < (bi->temp_max - di->t_hyst_lowhigh))) {
|
|
/* Alert zone for high temperature */
|
|
di->events.btemp_underover = false;
|
|
di->events.btemp_high = true;
|
|
di->t_hyst_norm = di->bm->temp_hysteresis;
|
|
di->t_hyst_lowhigh = 0;
|
|
} else if ((di->batt_data.temp > (bi->temp_min + di->t_hyst_lowhigh)) &&
|
|
(di->batt_data.temp <= bi->temp_alert_min)) {
|
|
/* Alert zone for low temperature */
|
|
di->events.btemp_underover = false;
|
|
di->events.btemp_low = true;
|
|
di->t_hyst_norm = di->bm->temp_hysteresis;
|
|
di->t_hyst_lowhigh = 0;
|
|
} else if (di->batt_data.temp <= bi->temp_min ||
|
|
di->batt_data.temp >= bi->temp_max) {
|
|
/* TEMP major!!!!! */
|
|
di->events.btemp_underover = true;
|
|
di->events.btemp_low = false;
|
|
di->events.btemp_high = false;
|
|
di->t_hyst_norm = 0;
|
|
di->t_hyst_lowhigh = di->bm->temp_hysteresis;
|
|
} else {
|
|
/* Within hysteresis */
|
|
dev_dbg(di->dev, "Within hysteresis limit temp: %d "
|
|
"hyst_lowhigh %d, hyst normal %d\n",
|
|
di->batt_data.temp, di->t_hyst_lowhigh,
|
|
di->t_hyst_norm);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_check_charger_voltage() - Check charger voltage
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
*
|
|
* Charger voltage is checked against maximum limit
|
|
*/
|
|
static void ab8500_chargalg_check_charger_voltage(struct ab8500_chargalg *di)
|
|
{
|
|
if (di->chg_info.usb_volt_uv > di->bm->chg_params->usb_volt_max_uv)
|
|
di->chg_info.usb_chg_ok = false;
|
|
else
|
|
di->chg_info.usb_chg_ok = true;
|
|
|
|
if (di->chg_info.ac_volt_uv > di->bm->chg_params->ac_volt_max_uv)
|
|
di->chg_info.ac_chg_ok = false;
|
|
else
|
|
di->chg_info.ac_chg_ok = true;
|
|
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
*
|
|
* End-of-charge criteria is fulfilled when the battery voltage is above a
|
|
* certain limit and the battery current is below a certain limit for a
|
|
* predefined number of consecutive seconds. If true, the battery is full
|
|
*/
|
|
static void ab8500_chargalg_end_of_charge(struct ab8500_chargalg *di)
|
|
{
|
|
if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING &&
|
|
di->charge_state == STATE_NORMAL &&
|
|
!di->maintenance_chg && (di->batt_data.volt_uv >=
|
|
di->bm->bi->voltage_max_design_uv ||
|
|
di->events.usb_cv_active || di->events.ac_cv_active) &&
|
|
di->batt_data.avg_curr_ua <
|
|
di->bm->bi->charge_term_current_ua &&
|
|
di->batt_data.avg_curr_ua > 0) {
|
|
if (++di->eoc_cnt >= EOC_COND_CNT) {
|
|
di->eoc_cnt = 0;
|
|
di->charge_status = POWER_SUPPLY_STATUS_FULL;
|
|
di->maintenance_chg = true;
|
|
dev_dbg(di->dev, "EOC reached!\n");
|
|
power_supply_changed(di->chargalg_psy);
|
|
} else {
|
|
dev_dbg(di->dev,
|
|
" EOC limit reached for the %d"
|
|
" time, out of %d before EOC\n",
|
|
di->eoc_cnt,
|
|
EOC_COND_CNT);
|
|
}
|
|
} else {
|
|
di->eoc_cnt = 0;
|
|
}
|
|
}
|
|
|
|
static void init_maxim_chg_curr(struct ab8500_chargalg *di)
|
|
{
|
|
struct power_supply_battery_info *bi = di->bm->bi;
|
|
|
|
di->ccm.original_iset_ua = bi->constant_charge_current_max_ua;
|
|
di->ccm.current_iset_ua = bi->constant_charge_current_max_ua;
|
|
di->ccm.max_current_ua = di->bm->maxi->chg_curr_ua;
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
di->ccm.level = 0;
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_chg_curr_maxim - increases the charger current to
|
|
* compensate for the system load
|
|
* @di pointer to the ab8500_chargalg structure
|
|
*
|
|
* This maximization function is used to raise the charger current to get the
|
|
* battery current as close to the optimal value as possible. The battery
|
|
* current during charging is affected by the system load
|
|
*/
|
|
static enum maxim_ret ab8500_chargalg_chg_curr_maxim(struct ab8500_chargalg *di)
|
|
{
|
|
|
|
if (!di->bm->maxi->ena_maxi)
|
|
return MAXIM_RET_NOACTION;
|
|
|
|
if (di->events.vbus_collapsed) {
|
|
dev_dbg(di->dev, "Charger voltage has collapsed %d\n",
|
|
di->ccm.wait_cnt);
|
|
if (di->ccm.wait_cnt == 0) {
|
|
dev_dbg(di->dev, "lowering current\n");
|
|
di->ccm.wait_cnt++;
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
di->ccm.max_current_ua = di->ccm.current_iset_ua;
|
|
di->ccm.current_iset_ua = di->ccm.max_current_ua;
|
|
di->ccm.level--;
|
|
return MAXIM_RET_CHANGE;
|
|
} else {
|
|
dev_dbg(di->dev, "waiting\n");
|
|
/* Let's go in here twice before lowering curr again */
|
|
di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3;
|
|
return MAXIM_RET_NOACTION;
|
|
}
|
|
}
|
|
|
|
di->ccm.wait_cnt = 0;
|
|
|
|
if (di->batt_data.inst_curr_ua > di->ccm.original_iset_ua) {
|
|
dev_dbg(di->dev, " Maximization Ibat (%duA) too high"
|
|
" (limit %duA) (current iset: %duA)!\n",
|
|
di->batt_data.inst_curr_ua, di->ccm.original_iset_ua,
|
|
di->ccm.current_iset_ua);
|
|
|
|
if (di->ccm.current_iset_ua == di->ccm.original_iset_ua)
|
|
return MAXIM_RET_NOACTION;
|
|
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
di->ccm.current_iset_ua = di->ccm.original_iset_ua;
|
|
di->ccm.level = 0;
|
|
|
|
return MAXIM_RET_IBAT_TOO_HIGH;
|
|
}
|
|
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
return MAXIM_RET_NOACTION;
|
|
}
|
|
|
|
static void handle_maxim_chg_curr(struct ab8500_chargalg *di)
|
|
{
|
|
struct power_supply_battery_info *bi = di->bm->bi;
|
|
enum maxim_ret ret;
|
|
int result;
|
|
|
|
ret = ab8500_chargalg_chg_curr_maxim(di);
|
|
switch (ret) {
|
|
case MAXIM_RET_CHANGE:
|
|
result = ab8500_chargalg_update_chg_curr(di,
|
|
di->ccm.current_iset_ua);
|
|
if (result)
|
|
dev_err(di->dev, "failed to set chg curr\n");
|
|
break;
|
|
case MAXIM_RET_IBAT_TOO_HIGH:
|
|
result = ab8500_chargalg_update_chg_curr(di,
|
|
bi->constant_charge_current_max_ua);
|
|
if (result)
|
|
dev_err(di->dev, "failed to set chg curr\n");
|
|
break;
|
|
|
|
case MAXIM_RET_NOACTION:
|
|
default:
|
|
/* Do nothing..*/
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int ab8500_chargalg_get_ext_psy_data(struct device *dev, void *data)
|
|
{
|
|
struct power_supply *psy;
|
|
struct power_supply *ext = dev_get_drvdata(dev);
|
|
const char **supplicants = (const char **)ext->supplied_to;
|
|
struct ab8500_chargalg *di;
|
|
union power_supply_propval ret;
|
|
int j;
|
|
bool capacity_updated = false;
|
|
|
|
psy = (struct power_supply *)data;
|
|
di = power_supply_get_drvdata(psy);
|
|
/* For all psy where the driver name appears in any supplied_to */
|
|
j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
|
|
if (j < 0)
|
|
return 0;
|
|
|
|
/*
|
|
* If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its
|
|
* property because of handling that sysfs entry on its own, this is
|
|
* the place to get the battery capacity.
|
|
*/
|
|
if (!power_supply_get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) {
|
|
di->batt_data.percent = ret.intval;
|
|
capacity_updated = true;
|
|
}
|
|
|
|
/* Go through all properties for the psy */
|
|
for (j = 0; j < ext->desc->num_properties; j++) {
|
|
enum power_supply_property prop;
|
|
prop = ext->desc->properties[j];
|
|
|
|
/*
|
|
* Initialize chargers if not already done.
|
|
* The ab8500_charger*/
|
|
if (!di->ac_chg &&
|
|
ext->desc->type == POWER_SUPPLY_TYPE_MAINS)
|
|
di->ac_chg = psy_to_ux500_charger(ext);
|
|
else if (!di->usb_chg &&
|
|
ext->desc->type == POWER_SUPPLY_TYPE_USB)
|
|
di->usb_chg = psy_to_ux500_charger(ext);
|
|
|
|
if (power_supply_get_property(ext, prop, &ret))
|
|
continue;
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
switch (ext->desc->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
/* Battery present */
|
|
if (ret.intval)
|
|
di->events.batt_rem = false;
|
|
/* Battery removed */
|
|
else
|
|
di->events.batt_rem = true;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
/* AC disconnected */
|
|
if (!ret.intval &&
|
|
(di->chg_info.conn_chg & AC_CHG)) {
|
|
di->chg_info.prev_conn_chg =
|
|
di->chg_info.conn_chg;
|
|
di->chg_info.conn_chg &= ~AC_CHG;
|
|
}
|
|
/* AC connected */
|
|
else if (ret.intval &&
|
|
!(di->chg_info.conn_chg & AC_CHG)) {
|
|
di->chg_info.prev_conn_chg =
|
|
di->chg_info.conn_chg;
|
|
di->chg_info.conn_chg |= AC_CHG;
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
/* USB disconnected */
|
|
if (!ret.intval &&
|
|
(di->chg_info.conn_chg & USB_CHG)) {
|
|
di->chg_info.prev_conn_chg =
|
|
di->chg_info.conn_chg;
|
|
di->chg_info.conn_chg &= ~USB_CHG;
|
|
}
|
|
/* USB connected */
|
|
else if (ret.intval &&
|
|
!(di->chg_info.conn_chg & USB_CHG)) {
|
|
di->chg_info.prev_conn_chg =
|
|
di->chg_info.conn_chg;
|
|
di->chg_info.conn_chg |= USB_CHG;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
switch (ext->desc->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
break;
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
/* AC offline */
|
|
if (!ret.intval &&
|
|
(di->chg_info.online_chg & AC_CHG)) {
|
|
di->chg_info.prev_online_chg =
|
|
di->chg_info.online_chg;
|
|
di->chg_info.online_chg &= ~AC_CHG;
|
|
}
|
|
/* AC online */
|
|
else if (ret.intval &&
|
|
!(di->chg_info.online_chg & AC_CHG)) {
|
|
di->chg_info.prev_online_chg =
|
|
di->chg_info.online_chg;
|
|
di->chg_info.online_chg |= AC_CHG;
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_wd_work, 0);
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
/* USB offline */
|
|
if (!ret.intval &&
|
|
(di->chg_info.online_chg & USB_CHG)) {
|
|
di->chg_info.prev_online_chg =
|
|
di->chg_info.online_chg;
|
|
di->chg_info.online_chg &= ~USB_CHG;
|
|
}
|
|
/* USB online */
|
|
else if (ret.intval &&
|
|
!(di->chg_info.online_chg & USB_CHG)) {
|
|
di->chg_info.prev_online_chg =
|
|
di->chg_info.online_chg;
|
|
di->chg_info.online_chg |= USB_CHG;
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_wd_work, 0);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_HEALTH:
|
|
switch (ext->desc->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
break;
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
switch (ret.intval) {
|
|
case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE:
|
|
di->events.mainextchnotok = true;
|
|
di->events.main_thermal_prot = false;
|
|
di->events.main_ovv = false;
|
|
di->events.ac_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_DEAD:
|
|
di->events.ac_wd_expired = true;
|
|
di->events.mainextchnotok = false;
|
|
di->events.main_ovv = false;
|
|
di->events.main_thermal_prot = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_COLD:
|
|
case POWER_SUPPLY_HEALTH_OVERHEAT:
|
|
di->events.main_thermal_prot = true;
|
|
di->events.mainextchnotok = false;
|
|
di->events.main_ovv = false;
|
|
di->events.ac_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_OVERVOLTAGE:
|
|
di->events.main_ovv = true;
|
|
di->events.mainextchnotok = false;
|
|
di->events.main_thermal_prot = false;
|
|
di->events.ac_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_GOOD:
|
|
di->events.main_thermal_prot = false;
|
|
di->events.mainextchnotok = false;
|
|
di->events.main_ovv = false;
|
|
di->events.ac_wd_expired = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
switch (ret.intval) {
|
|
case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE:
|
|
di->events.usbchargernotok = true;
|
|
di->events.usb_thermal_prot = false;
|
|
di->events.vbus_ovv = false;
|
|
di->events.usb_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_DEAD:
|
|
di->events.usb_wd_expired = true;
|
|
di->events.usbchargernotok = false;
|
|
di->events.usb_thermal_prot = false;
|
|
di->events.vbus_ovv = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_COLD:
|
|
case POWER_SUPPLY_HEALTH_OVERHEAT:
|
|
di->events.usb_thermal_prot = true;
|
|
di->events.usbchargernotok = false;
|
|
di->events.vbus_ovv = false;
|
|
di->events.usb_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_OVERVOLTAGE:
|
|
di->events.vbus_ovv = true;
|
|
di->events.usbchargernotok = false;
|
|
di->events.usb_thermal_prot = false;
|
|
di->events.usb_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_GOOD:
|
|
di->events.usbchargernotok = false;
|
|
di->events.usb_thermal_prot = false;
|
|
di->events.vbus_ovv = false;
|
|
di->events.usb_wd_expired = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
switch (ext->desc->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
di->batt_data.volt_uv = ret.intval;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
di->chg_info.ac_volt_uv = ret.intval;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
di->chg_info.usb_volt_uv = ret.intval;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
|
|
switch (ext->desc->type) {
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
/* AVG is used to indicate when we are
|
|
* in CV mode */
|
|
if (ret.intval)
|
|
di->events.ac_cv_active = true;
|
|
else
|
|
di->events.ac_cv_active = false;
|
|
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
/* AVG is used to indicate when we are
|
|
* in CV mode */
|
|
if (ret.intval)
|
|
di->events.usb_cv_active = true;
|
|
else
|
|
di->events.usb_cv_active = false;
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_TECHNOLOGY:
|
|
switch (ext->desc->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
if (ret.intval)
|
|
di->events.batt_unknown = false;
|
|
else
|
|
di->events.batt_unknown = true;
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_TEMP:
|
|
di->batt_data.temp = ret.intval / 10;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
|
switch (ext->desc->type) {
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
di->chg_info.ac_curr_ua = ret.intval;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
di->chg_info.usb_curr_ua = ret.intval;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
di->batt_data.inst_curr_ua = ret.intval;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CURRENT_AVG:
|
|
switch (ext->desc->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
di->batt_data.avg_curr_ua = ret.intval;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
if (ret.intval)
|
|
di->events.vbus_collapsed = true;
|
|
else
|
|
di->events.vbus_collapsed = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_PROP_CAPACITY:
|
|
if (!capacity_updated)
|
|
di->batt_data.percent = ret.intval;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_external_power_changed() - callback for power supply changes
|
|
* @psy: pointer to the structure power_supply
|
|
*
|
|
* This function is the entry point of the pointer external_power_changed
|
|
* of the structure power_supply.
|
|
* This function gets executed when there is a change in any external power
|
|
* supply that this driver needs to be notified of.
|
|
*/
|
|
static void ab8500_chargalg_external_power_changed(struct power_supply *psy)
|
|
{
|
|
struct ab8500_chargalg *di = power_supply_get_drvdata(psy);
|
|
|
|
/*
|
|
* Trigger execution of the algorithm instantly and read
|
|
* all power_supply properties there instead
|
|
*/
|
|
if (di->chargalg_wq)
|
|
queue_work(di->chargalg_wq, &di->chargalg_work);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_time_to_restart() - time to restart CC/CV charging?
|
|
* @di: charging algorithm state
|
|
*
|
|
* This checks if the voltage or capacity of the battery has fallen so
|
|
* low that we need to restart the CC/CV charge cycle.
|
|
*/
|
|
static bool ab8500_chargalg_time_to_restart(struct ab8500_chargalg *di)
|
|
{
|
|
struct power_supply_battery_info *bi = di->bm->bi;
|
|
|
|
/* Sanity check - these need to have some reasonable values */
|
|
if (!di->batt_data.volt_uv || !di->batt_data.percent)
|
|
return false;
|
|
|
|
/* Some batteries tell us at which voltage we should restart charging */
|
|
if (bi->charge_restart_voltage_uv > 0) {
|
|
if (di->batt_data.volt_uv <= bi->charge_restart_voltage_uv)
|
|
return true;
|
|
/* Else we restart as we reach a certain capacity */
|
|
} else {
|
|
if (di->batt_data.percent <= AB8500_RECHARGE_CAP)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_algorithm() - Main function for the algorithm
|
|
* @di: pointer to the ab8500_chargalg structure
|
|
*
|
|
* This is the main control function for the charging algorithm.
|
|
* It is called periodically or when something happens that will
|
|
* trigger a state change
|
|
*/
|
|
static void ab8500_chargalg_algorithm(struct ab8500_chargalg *di)
|
|
{
|
|
struct power_supply_battery_info *bi = di->bm->bi;
|
|
struct power_supply_maintenance_charge_table *mt;
|
|
int charger_status;
|
|
int ret;
|
|
|
|
/* Collect data from all power_supply class devices */
|
|
class_for_each_device(power_supply_class, NULL,
|
|
di->chargalg_psy, ab8500_chargalg_get_ext_psy_data);
|
|
|
|
ab8500_chargalg_end_of_charge(di);
|
|
ab8500_chargalg_check_temp(di);
|
|
ab8500_chargalg_check_charger_voltage(di);
|
|
|
|
charger_status = ab8500_chargalg_check_charger_connection(di);
|
|
|
|
if (is_ab8500(di->parent)) {
|
|
ret = ab8500_chargalg_check_charger_enable(di);
|
|
if (ret < 0)
|
|
dev_err(di->dev, "Checking charger is enabled error"
|
|
": Returned Value %d\n", ret);
|
|
}
|
|
|
|
/*
|
|
* First check if we have a charger connected.
|
|
* Also we don't allow charging of unknown batteries if configured
|
|
* this way
|
|
*/
|
|
if (!charger_status ||
|
|
(di->events.batt_unknown && !di->bm->chg_unknown_bat)) {
|
|
if (di->charge_state != STATE_HANDHELD) {
|
|
di->events.safety_timer_expired = false;
|
|
ab8500_chargalg_state_to(di, STATE_HANDHELD_INIT);
|
|
}
|
|
}
|
|
|
|
/* Safety timer expiration */
|
|
else if (di->events.safety_timer_expired) {
|
|
if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED)
|
|
ab8500_chargalg_state_to(di,
|
|
STATE_SAFETY_TIMER_EXPIRED_INIT);
|
|
}
|
|
/*
|
|
* Check if any interrupts has occurred
|
|
* that will prevent us from charging
|
|
*/
|
|
|
|
/* Battery removed */
|
|
else if (di->events.batt_rem) {
|
|
if (di->charge_state != STATE_BATT_REMOVED)
|
|
ab8500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT);
|
|
}
|
|
/* Main or USB charger not ok. */
|
|
else if (di->events.mainextchnotok || di->events.usbchargernotok) {
|
|
/*
|
|
* If vbus_collapsed is set, we have to lower the charger
|
|
* current, which is done in the normal state below
|
|
*/
|
|
if (di->charge_state != STATE_CHG_NOT_OK &&
|
|
!di->events.vbus_collapsed)
|
|
ab8500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT);
|
|
}
|
|
/* VBUS, Main or VBAT OVV. */
|
|
else if (di->events.vbus_ovv ||
|
|
di->events.main_ovv ||
|
|
di->events.batt_ovv ||
|
|
!di->chg_info.usb_chg_ok ||
|
|
!di->chg_info.ac_chg_ok) {
|
|
if (di->charge_state != STATE_OVV_PROTECT)
|
|
ab8500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT);
|
|
}
|
|
/* USB Thermal, stop charging */
|
|
else if (di->events.main_thermal_prot ||
|
|
di->events.usb_thermal_prot) {
|
|
if (di->charge_state != STATE_HW_TEMP_PROTECT)
|
|
ab8500_chargalg_state_to(di,
|
|
STATE_HW_TEMP_PROTECT_INIT);
|
|
}
|
|
/* Battery temp over/under */
|
|
else if (di->events.btemp_underover) {
|
|
if (di->charge_state != STATE_TEMP_UNDEROVER)
|
|
ab8500_chargalg_state_to(di,
|
|
STATE_TEMP_UNDEROVER_INIT);
|
|
}
|
|
/* Watchdog expired */
|
|
else if (di->events.ac_wd_expired ||
|
|
di->events.usb_wd_expired) {
|
|
if (di->charge_state != STATE_WD_EXPIRED)
|
|
ab8500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT);
|
|
}
|
|
/* Battery temp high/low */
|
|
else if (di->events.btemp_low || di->events.btemp_high) {
|
|
if (di->charge_state != STATE_TEMP_LOWHIGH)
|
|
ab8500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT);
|
|
}
|
|
|
|
dev_dbg(di->dev,
|
|
"[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d "
|
|
"State %s Active_chg %d Chg_status %d AC %d USB %d "
|
|
"AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d "
|
|
"USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n",
|
|
di->batt_data.volt_uv,
|
|
di->batt_data.avg_curr_ua,
|
|
di->batt_data.inst_curr_ua,
|
|
di->batt_data.temp,
|
|
di->batt_data.percent,
|
|
di->maintenance_chg,
|
|
states[di->charge_state],
|
|
di->chg_info.charger_type,
|
|
di->charge_status,
|
|
di->chg_info.conn_chg & AC_CHG,
|
|
di->chg_info.conn_chg & USB_CHG,
|
|
di->chg_info.online_chg & AC_CHG,
|
|
di->chg_info.online_chg & USB_CHG,
|
|
di->events.ac_cv_active,
|
|
di->events.usb_cv_active,
|
|
di->chg_info.ac_curr_ua,
|
|
di->chg_info.usb_curr_ua,
|
|
di->chg_info.ac_vset_uv,
|
|
di->chg_info.ac_iset_ua,
|
|
di->chg_info.usb_vset_uv,
|
|
di->chg_info.usb_iset_ua);
|
|
|
|
switch (di->charge_state) {
|
|
case STATE_HANDHELD_INIT:
|
|
ab8500_chargalg_stop_charging(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
ab8500_chargalg_state_to(di, STATE_HANDHELD);
|
|
fallthrough;
|
|
|
|
case STATE_HANDHELD:
|
|
break;
|
|
|
|
case STATE_BATT_REMOVED_INIT:
|
|
ab8500_chargalg_stop_charging(di);
|
|
ab8500_chargalg_state_to(di, STATE_BATT_REMOVED);
|
|
fallthrough;
|
|
|
|
case STATE_BATT_REMOVED:
|
|
if (!di->events.batt_rem)
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_HW_TEMP_PROTECT_INIT:
|
|
ab8500_chargalg_stop_charging(di);
|
|
ab8500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT);
|
|
fallthrough;
|
|
|
|
case STATE_HW_TEMP_PROTECT:
|
|
if (!di->events.main_thermal_prot &&
|
|
!di->events.usb_thermal_prot)
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_OVV_PROTECT_INIT:
|
|
ab8500_chargalg_stop_charging(di);
|
|
ab8500_chargalg_state_to(di, STATE_OVV_PROTECT);
|
|
fallthrough;
|
|
|
|
case STATE_OVV_PROTECT:
|
|
if (!di->events.vbus_ovv &&
|
|
!di->events.main_ovv &&
|
|
!di->events.batt_ovv &&
|
|
di->chg_info.usb_chg_ok &&
|
|
di->chg_info.ac_chg_ok)
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_CHG_NOT_OK_INIT:
|
|
ab8500_chargalg_stop_charging(di);
|
|
ab8500_chargalg_state_to(di, STATE_CHG_NOT_OK);
|
|
fallthrough;
|
|
|
|
case STATE_CHG_NOT_OK:
|
|
if (!di->events.mainextchnotok &&
|
|
!di->events.usbchargernotok)
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_SAFETY_TIMER_EXPIRED_INIT:
|
|
ab8500_chargalg_stop_charging(di);
|
|
ab8500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED);
|
|
fallthrough;
|
|
|
|
case STATE_SAFETY_TIMER_EXPIRED:
|
|
/* We exit this state when charger is removed */
|
|
break;
|
|
|
|
case STATE_NORMAL_INIT:
|
|
if (bi->constant_charge_current_max_ua == 0)
|
|
/* "charging" with 0 uA */
|
|
ab8500_chargalg_stop_charging(di);
|
|
else {
|
|
ab8500_chargalg_start_charging(di,
|
|
bi->constant_charge_voltage_max_uv,
|
|
bi->constant_charge_current_max_ua);
|
|
}
|
|
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL);
|
|
ab8500_chargalg_start_safety_timer(di);
|
|
ab8500_chargalg_stop_maintenance_timer(di);
|
|
init_maxim_chg_curr(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
di->eoc_cnt = 0;
|
|
di->maintenance_chg = false;
|
|
power_supply_changed(di->chargalg_psy);
|
|
|
|
break;
|
|
|
|
case STATE_NORMAL:
|
|
handle_maxim_chg_curr(di);
|
|
if (di->charge_status == POWER_SUPPLY_STATUS_FULL &&
|
|
di->maintenance_chg) {
|
|
/*
|
|
* The battery is fully charged, check if we support
|
|
* maintenance charging else go back to waiting for
|
|
* the recharge voltage limit.
|
|
*/
|
|
if (!power_supply_supports_maintenance_charging(bi))
|
|
ab8500_chargalg_state_to(di,
|
|
STATE_WAIT_FOR_RECHARGE_INIT);
|
|
else
|
|
ab8500_chargalg_state_to(di,
|
|
STATE_MAINTENANCE_A_INIT);
|
|
}
|
|
break;
|
|
|
|
/* This state will be used when the maintenance state is disabled */
|
|
case STATE_WAIT_FOR_RECHARGE_INIT:
|
|
ab8500_chargalg_hold_charging(di);
|
|
ab8500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE);
|
|
fallthrough;
|
|
|
|
case STATE_WAIT_FOR_RECHARGE:
|
|
if (ab8500_chargalg_time_to_restart(di))
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_MAINTENANCE_A_INIT:
|
|
mt = power_supply_get_maintenance_charging_setting(bi, 0);
|
|
if (!mt) {
|
|
/* No maintenance A state, go back to normal */
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
power_supply_changed(di->chargalg_psy);
|
|
break;
|
|
}
|
|
ab8500_chargalg_stop_safety_timer(di);
|
|
ab8500_chargalg_start_maintenance_timer(di,
|
|
mt->charge_safety_timer_minutes);
|
|
ab8500_chargalg_start_charging(di,
|
|
mt->charge_voltage_max_uv,
|
|
mt->charge_current_max_ua);
|
|
ab8500_chargalg_state_to(di, STATE_MAINTENANCE_A);
|
|
power_supply_changed(di->chargalg_psy);
|
|
fallthrough;
|
|
|
|
case STATE_MAINTENANCE_A:
|
|
if (di->events.maintenance_timer_expired) {
|
|
ab8500_chargalg_stop_maintenance_timer(di);
|
|
ab8500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT);
|
|
}
|
|
/*
|
|
* This happens if the voltage drops too quickly during
|
|
* maintenance charging, especially in older batteries.
|
|
*/
|
|
if (ab8500_chargalg_time_to_restart(di)) {
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
dev_info(di->dev, "restarted charging from maintenance state A - battery getting old?\n");
|
|
}
|
|
break;
|
|
|
|
case STATE_MAINTENANCE_B_INIT:
|
|
mt = power_supply_get_maintenance_charging_setting(bi, 1);
|
|
if (!mt) {
|
|
/* No maintenance B state, go back to normal */
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
power_supply_changed(di->chargalg_psy);
|
|
break;
|
|
}
|
|
ab8500_chargalg_start_maintenance_timer(di,
|
|
mt->charge_safety_timer_minutes);
|
|
ab8500_chargalg_start_charging(di,
|
|
mt->charge_voltage_max_uv,
|
|
mt->charge_current_max_ua);
|
|
ab8500_chargalg_state_to(di, STATE_MAINTENANCE_B);
|
|
power_supply_changed(di->chargalg_psy);
|
|
fallthrough;
|
|
|
|
case STATE_MAINTENANCE_B:
|
|
if (di->events.maintenance_timer_expired) {
|
|
ab8500_chargalg_stop_maintenance_timer(di);
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
}
|
|
/*
|
|
* This happens if the voltage drops too quickly during
|
|
* maintenance charging, especially in older batteries.
|
|
*/
|
|
if (ab8500_chargalg_time_to_restart(di)) {
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
dev_info(di->dev, "restarted charging from maintenance state B - battery getting old?\n");
|
|
}
|
|
break;
|
|
|
|
case STATE_TEMP_LOWHIGH_INIT:
|
|
if (di->events.btemp_low) {
|
|
ab8500_chargalg_start_charging(di,
|
|
bi->alert_low_temp_charge_voltage_uv,
|
|
bi->alert_low_temp_charge_current_ua);
|
|
} else if (di->events.btemp_high) {
|
|
ab8500_chargalg_start_charging(di,
|
|
bi->alert_high_temp_charge_voltage_uv,
|
|
bi->alert_high_temp_charge_current_ua);
|
|
} else {
|
|
dev_err(di->dev, "neither low or high temp event occurred\n");
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
}
|
|
ab8500_chargalg_stop_maintenance_timer(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
ab8500_chargalg_state_to(di, STATE_TEMP_LOWHIGH);
|
|
power_supply_changed(di->chargalg_psy);
|
|
fallthrough;
|
|
|
|
case STATE_TEMP_LOWHIGH:
|
|
if (!di->events.btemp_low && !di->events.btemp_high)
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_WD_EXPIRED_INIT:
|
|
ab8500_chargalg_stop_charging(di);
|
|
ab8500_chargalg_state_to(di, STATE_WD_EXPIRED);
|
|
fallthrough;
|
|
|
|
case STATE_WD_EXPIRED:
|
|
if (!di->events.ac_wd_expired &&
|
|
!di->events.usb_wd_expired)
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_TEMP_UNDEROVER_INIT:
|
|
ab8500_chargalg_stop_charging(di);
|
|
ab8500_chargalg_state_to(di, STATE_TEMP_UNDEROVER);
|
|
fallthrough;
|
|
|
|
case STATE_TEMP_UNDEROVER:
|
|
if (!di->events.btemp_underover)
|
|
ab8500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
}
|
|
|
|
/* Start charging directly if the new state is a charge state */
|
|
if (di->charge_state == STATE_NORMAL_INIT ||
|
|
di->charge_state == STATE_MAINTENANCE_A_INIT ||
|
|
di->charge_state == STATE_MAINTENANCE_B_INIT)
|
|
queue_work(di->chargalg_wq, &di->chargalg_work);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_periodic_work() - Periodic work for the algorithm
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for the charging algorithm
|
|
*/
|
|
static void ab8500_chargalg_periodic_work(struct work_struct *work)
|
|
{
|
|
struct ab8500_chargalg *di = container_of(work,
|
|
struct ab8500_chargalg, chargalg_periodic_work.work);
|
|
|
|
ab8500_chargalg_algorithm(di);
|
|
|
|
/*
|
|
* If a charger is connected then the battery has to be monitored
|
|
* frequently, else the work can be delayed.
|
|
*/
|
|
if (di->chg_info.conn_chg)
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_periodic_work,
|
|
di->bm->interval_charging * HZ);
|
|
else
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_periodic_work,
|
|
di->bm->interval_not_charging * HZ);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_wd_work() - periodic work to kick the charger watchdog
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for kicking the charger watchdog
|
|
*/
|
|
static void ab8500_chargalg_wd_work(struct work_struct *work)
|
|
{
|
|
int ret;
|
|
struct ab8500_chargalg *di = container_of(work,
|
|
struct ab8500_chargalg, chargalg_wd_work.work);
|
|
|
|
ret = ab8500_chargalg_kick_watchdog(di);
|
|
if (ret < 0)
|
|
dev_err(di->dev, "failed to kick watchdog\n");
|
|
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_wd_work, CHG_WD_INTERVAL);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_work() - Work to run the charging algorithm instantly
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for calling the charging algorithm
|
|
*/
|
|
static void ab8500_chargalg_work(struct work_struct *work)
|
|
{
|
|
struct ab8500_chargalg *di = container_of(work,
|
|
struct ab8500_chargalg, chargalg_work);
|
|
|
|
ab8500_chargalg_algorithm(di);
|
|
}
|
|
|
|
/**
|
|
* ab8500_chargalg_get_property() - get the chargalg properties
|
|
* @psy: pointer to the power_supply structure
|
|
* @psp: pointer to the power_supply_property structure
|
|
* @val: pointer to the power_supply_propval union
|
|
*
|
|
* This function gets called when an application tries to get the
|
|
* chargalg properties by reading the sysfs files.
|
|
* status: charging/discharging/full/unknown
|
|
* health: health of the battery
|
|
* Returns error code in case of failure else 0 on success
|
|
*/
|
|
static int ab8500_chargalg_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct ab8500_chargalg *di = power_supply_get_drvdata(psy);
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
val->intval = di->charge_status;
|
|
break;
|
|
case POWER_SUPPLY_PROP_HEALTH:
|
|
if (di->events.batt_ovv) {
|
|
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
|
|
} else if (di->events.btemp_underover) {
|
|
if (di->batt_data.temp <= di->bm->bi->temp_min)
|
|
val->intval = POWER_SUPPLY_HEALTH_COLD;
|
|
else
|
|
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
|
|
} else if (di->charge_state == STATE_SAFETY_TIMER_EXPIRED ||
|
|
di->charge_state == STATE_SAFETY_TIMER_EXPIRED_INIT) {
|
|
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
|
|
} else {
|
|
val->intval = POWER_SUPPLY_HEALTH_GOOD;
|
|
}
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused ab8500_chargalg_resume(struct device *dev)
|
|
{
|
|
struct ab8500_chargalg *di = dev_get_drvdata(dev);
|
|
|
|
/* Kick charger watchdog if charging (any charger online) */
|
|
if (di->chg_info.online_chg)
|
|
queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0);
|
|
|
|
/*
|
|
* Run the charging algorithm directly to be sure we don't
|
|
* do it too seldom
|
|
*/
|
|
queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused ab8500_chargalg_suspend(struct device *dev)
|
|
{
|
|
struct ab8500_chargalg *di = dev_get_drvdata(dev);
|
|
|
|
if (di->chg_info.online_chg)
|
|
cancel_delayed_work_sync(&di->chargalg_wd_work);
|
|
|
|
cancel_delayed_work_sync(&di->chargalg_periodic_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static char *supply_interface[] = {
|
|
"ab8500_fg",
|
|
};
|
|
|
|
static const struct power_supply_desc ab8500_chargalg_desc = {
|
|
.name = "ab8500_chargalg",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.properties = ab8500_chargalg_props,
|
|
.num_properties = ARRAY_SIZE(ab8500_chargalg_props),
|
|
.get_property = ab8500_chargalg_get_property,
|
|
.external_power_changed = ab8500_chargalg_external_power_changed,
|
|
};
|
|
|
|
static int ab8500_chargalg_bind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct ab8500_chargalg *di = dev_get_drvdata(dev);
|
|
|
|
/* Create a work queue for the chargalg */
|
|
di->chargalg_wq = alloc_ordered_workqueue("ab8500_chargalg_wq",
|
|
WQ_MEM_RECLAIM);
|
|
if (di->chargalg_wq == NULL) {
|
|
dev_err(di->dev, "failed to create work queue\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Run the charging algorithm */
|
|
queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ab8500_chargalg_unbind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct ab8500_chargalg *di = dev_get_drvdata(dev);
|
|
|
|
/* Stop all timers and work */
|
|
hrtimer_cancel(&di->safety_timer);
|
|
hrtimer_cancel(&di->maintenance_timer);
|
|
|
|
cancel_delayed_work_sync(&di->chargalg_periodic_work);
|
|
cancel_delayed_work_sync(&di->chargalg_wd_work);
|
|
cancel_work_sync(&di->chargalg_work);
|
|
|
|
/* Delete the work queue */
|
|
destroy_workqueue(di->chargalg_wq);
|
|
}
|
|
|
|
static const struct component_ops ab8500_chargalg_component_ops = {
|
|
.bind = ab8500_chargalg_bind,
|
|
.unbind = ab8500_chargalg_unbind,
|
|
};
|
|
|
|
static int ab8500_chargalg_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct power_supply_config psy_cfg = {};
|
|
struct ab8500_chargalg *di;
|
|
|
|
di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
|
|
if (!di)
|
|
return -ENOMEM;
|
|
|
|
di->bm = &ab8500_bm_data;
|
|
|
|
/* get device struct and parent */
|
|
di->dev = dev;
|
|
di->parent = dev_get_drvdata(pdev->dev.parent);
|
|
|
|
psy_cfg.supplied_to = supply_interface;
|
|
psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
|
|
psy_cfg.drv_data = di;
|
|
|
|
/* Initilialize safety timer */
|
|
hrtimer_init(&di->safety_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
|
di->safety_timer.function = ab8500_chargalg_safety_timer_expired;
|
|
|
|
/* Initilialize maintenance timer */
|
|
hrtimer_init(&di->maintenance_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
|
di->maintenance_timer.function =
|
|
ab8500_chargalg_maintenance_timer_expired;
|
|
|
|
/* Init work for chargalg */
|
|
INIT_DEFERRABLE_WORK(&di->chargalg_periodic_work,
|
|
ab8500_chargalg_periodic_work);
|
|
INIT_DEFERRABLE_WORK(&di->chargalg_wd_work,
|
|
ab8500_chargalg_wd_work);
|
|
|
|
/* Init work for chargalg */
|
|
INIT_WORK(&di->chargalg_work, ab8500_chargalg_work);
|
|
|
|
/* To detect charger at startup */
|
|
di->chg_info.prev_conn_chg = -1;
|
|
|
|
/* Register chargalg power supply class */
|
|
di->chargalg_psy = devm_power_supply_register(di->dev,
|
|
&ab8500_chargalg_desc,
|
|
&psy_cfg);
|
|
if (IS_ERR(di->chargalg_psy)) {
|
|
dev_err(di->dev, "failed to register chargalg psy\n");
|
|
return PTR_ERR(di->chargalg_psy);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, di);
|
|
|
|
dev_info(di->dev, "probe success\n");
|
|
return component_add(dev, &ab8500_chargalg_component_ops);
|
|
}
|
|
|
|
static int ab8500_chargalg_remove(struct platform_device *pdev)
|
|
{
|
|
component_del(&pdev->dev, &ab8500_chargalg_component_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(ab8500_chargalg_pm_ops, ab8500_chargalg_suspend, ab8500_chargalg_resume);
|
|
|
|
static const struct of_device_id ab8500_chargalg_match[] = {
|
|
{ .compatible = "stericsson,ab8500-chargalg", },
|
|
{ },
|
|
};
|
|
|
|
struct platform_driver ab8500_chargalg_driver = {
|
|
.probe = ab8500_chargalg_probe,
|
|
.remove = ab8500_chargalg_remove,
|
|
.driver = {
|
|
.name = "ab8500_chargalg",
|
|
.of_match_table = ab8500_chargalg_match,
|
|
.pm = &ab8500_chargalg_pm_ops,
|
|
},
|
|
};
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Johan Palsson, Karl Komierowski");
|
|
MODULE_ALIAS("platform:ab8500-chargalg");
|
|
MODULE_DESCRIPTION("ab8500 battery charging algorithm");
|