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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/power/charger-manager.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/power/charger-manager.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/power/charger-manager.c | 1063 |
1 files changed, 0 insertions, 1063 deletions
diff --git a/ANDROID_3.4.5/drivers/power/charger-manager.c b/ANDROID_3.4.5/drivers/power/charger-manager.c deleted file mode 100644 index 9eca9f1f..00000000 --- a/ANDROID_3.4.5/drivers/power/charger-manager.c +++ /dev/null @@ -1,1063 +0,0 @@ -/* - * Copyright (C) 2011 Samsung Electronics Co., Ltd. - * MyungJoo Ham <myungjoo.ham@samsung.com> - * - * This driver enables to monitor battery health and control charger - * during suspend-to-mem. - * Charger manager depends on other devices. register this later than - * the depending devices. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -**/ - -#include <linux/io.h> -#include <linux/module.h> -#include <linux/irq.h> -#include <linux/interrupt.h> -#include <linux/rtc.h> -#include <linux/slab.h> -#include <linux/workqueue.h> -#include <linux/platform_device.h> -#include <linux/power/charger-manager.h> -#include <linux/regulator/consumer.h> - -/* - * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for - * delayed works so that we can run delayed works with CM_JIFFIES_SMALL - * without any delays. - */ -#define CM_JIFFIES_SMALL (2) - -/* If y is valid (> 0) and smaller than x, do x = y */ -#define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x)) - -/* - * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking - * rtc alarm. It should be 2 or larger - */ -#define CM_RTC_SMALL (2) - -#define UEVENT_BUF_SIZE 32 - -static LIST_HEAD(cm_list); -static DEFINE_MUTEX(cm_list_mtx); - -/* About in-suspend (suspend-again) monitoring */ -static struct rtc_device *rtc_dev; -/* - * Backup RTC alarm - * Save the wakeup alarm before entering suspend-to-RAM - */ -static struct rtc_wkalrm rtc_wkalarm_save; -/* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */ -static unsigned long rtc_wkalarm_save_time; -static bool cm_suspended; -static bool cm_rtc_set; -static unsigned long cm_suspend_duration_ms; - -/* Global charger-manager description */ -static struct charger_global_desc *g_desc; /* init with setup_charger_manager */ - -/** - * is_batt_present - See if the battery presents in place. - * @cm: the Charger Manager representing the battery. - */ -static bool is_batt_present(struct charger_manager *cm) -{ - union power_supply_propval val; - bool present = false; - int i, ret; - - switch (cm->desc->battery_present) { - case CM_FUEL_GAUGE: - ret = cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_PRESENT, &val); - if (ret == 0 && val.intval) - present = true; - break; - case CM_CHARGER_STAT: - for (i = 0; cm->charger_stat[i]; i++) { - ret = cm->charger_stat[i]->get_property( - cm->charger_stat[i], - POWER_SUPPLY_PROP_PRESENT, &val); - if (ret == 0 && val.intval) { - present = true; - break; - } - } - break; - } - - return present; -} - -/** - * is_ext_pwr_online - See if an external power source is attached to charge - * @cm: the Charger Manager representing the battery. - * - * Returns true if at least one of the chargers of the battery has an external - * power source attached to charge the battery regardless of whether it is - * actually charging or not. - */ -static bool is_ext_pwr_online(struct charger_manager *cm) -{ - union power_supply_propval val; - bool online = false; - int i, ret; - - /* If at least one of them has one, it's yes. */ - for (i = 0; cm->charger_stat[i]; i++) { - ret = cm->charger_stat[i]->get_property( - cm->charger_stat[i], - POWER_SUPPLY_PROP_ONLINE, &val); - if (ret == 0 && val.intval) { - online = true; - break; - } - } - - return online; -} - -/** - * get_batt_uV - Get the voltage level of the battery - * @cm: the Charger Manager representing the battery. - * @uV: the voltage level returned. - * - * Returns 0 if there is no error. - * Returns a negative value on error. - */ -static int get_batt_uV(struct charger_manager *cm, int *uV) -{ - union power_supply_propval val; - int ret; - - if (!cm->fuel_gauge) - return -ENODEV; - - ret = cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); - if (ret) - return ret; - - *uV = val.intval; - return 0; -} - -/** - * is_charging - Returns true if the battery is being charged. - * @cm: the Charger Manager representing the battery. - */ -static bool is_charging(struct charger_manager *cm) -{ - int i, ret; - bool charging = false; - union power_supply_propval val; - - /* If there is no battery, it cannot be charged */ - if (!is_batt_present(cm)) - return false; - - /* If at least one of the charger is charging, return yes */ - for (i = 0; cm->charger_stat[i]; i++) { - /* 1. The charger sholuld not be DISABLED */ - if (cm->emergency_stop) - continue; - if (!cm->charger_enabled) - continue; - - /* 2. The charger should be online (ext-power) */ - ret = cm->charger_stat[i]->get_property( - cm->charger_stat[i], - POWER_SUPPLY_PROP_ONLINE, &val); - if (ret) { - dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n", - cm->desc->psy_charger_stat[i]); - continue; - } - if (val.intval == 0) - continue; - - /* - * 3. The charger should not be FULL, DISCHARGING, - * or NOT_CHARGING. - */ - ret = cm->charger_stat[i]->get_property( - cm->charger_stat[i], - POWER_SUPPLY_PROP_STATUS, &val); - if (ret) { - dev_warn(cm->dev, "Cannot read STATUS value from %s.\n", - cm->desc->psy_charger_stat[i]); - continue; - } - if (val.intval == POWER_SUPPLY_STATUS_FULL || - val.intval == POWER_SUPPLY_STATUS_DISCHARGING || - val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) - continue; - - /* Then, this is charging. */ - charging = true; - break; - } - - return charging; -} - -/** - * is_polling_required - Return true if need to continue polling for this CM. - * @cm: the Charger Manager representing the battery. - */ -static bool is_polling_required(struct charger_manager *cm) -{ - switch (cm->desc->polling_mode) { - case CM_POLL_DISABLE: - return false; - case CM_POLL_ALWAYS: - return true; - case CM_POLL_EXTERNAL_POWER_ONLY: - return is_ext_pwr_online(cm); - case CM_POLL_CHARGING_ONLY: - return is_charging(cm); - default: - dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", - cm->desc->polling_mode); - } - - return false; -} - -/** - * try_charger_enable - Enable/Disable chargers altogether - * @cm: the Charger Manager representing the battery. - * @enable: true: enable / false: disable - * - * Note that Charger Manager keeps the charger enabled regardless whether - * the charger is charging or not (because battery is full or no external - * power source exists) except when CM needs to disable chargers forcibly - * bacause of emergency causes; when the battery is overheated or too cold. - */ -static int try_charger_enable(struct charger_manager *cm, bool enable) -{ - int err = 0, i; - struct charger_desc *desc = cm->desc; - - /* Ignore if it's redundent command */ - if (enable == cm->charger_enabled) - return 0; - - if (enable) { - if (cm->emergency_stop) - return -EAGAIN; - err = regulator_bulk_enable(desc->num_charger_regulators, - desc->charger_regulators); - } else { - /* - * Abnormal battery state - Stop charging forcibly, - * even if charger was enabled at the other places - */ - err = regulator_bulk_disable(desc->num_charger_regulators, - desc->charger_regulators); - - for (i = 0; i < desc->num_charger_regulators; i++) { - if (regulator_is_enabled( - desc->charger_regulators[i].consumer)) { - regulator_force_disable( - desc->charger_regulators[i].consumer); - dev_warn(cm->dev, - "Disable regulator(%s) forcibly.\n", - desc->charger_regulators[i].supply); - } - } - } - - if (!err) - cm->charger_enabled = enable; - - return err; -} - -/** - * uevent_notify - Let users know something has changed. - * @cm: the Charger Manager representing the battery. - * @event: the event string. - * - * If @event is null, it implies that uevent_notify is called - * by resume function. When called in the resume function, cm_suspended - * should be already reset to false in order to let uevent_notify - * notify the recent event during the suspend to users. While - * suspended, uevent_notify does not notify users, but tracks - * events so that uevent_notify can notify users later after resumed. - */ -static void uevent_notify(struct charger_manager *cm, const char *event) -{ - static char env_str[UEVENT_BUF_SIZE + 1] = ""; - static char env_str_save[UEVENT_BUF_SIZE + 1] = ""; - - if (cm_suspended) { - /* Nothing in suspended-event buffer */ - if (env_str_save[0] == 0) { - if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) - return; /* status not changed */ - strncpy(env_str_save, event, UEVENT_BUF_SIZE); - return; - } - - if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) - return; /* Duplicated. */ - strncpy(env_str_save, event, UEVENT_BUF_SIZE); - return; - } - - if (event == NULL) { - /* No messages pending */ - if (!env_str_save[0]) - return; - - strncpy(env_str, env_str_save, UEVENT_BUF_SIZE); - kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); - env_str_save[0] = 0; - - return; - } - - /* status not changed */ - if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) - return; - - /* save the status and notify the update */ - strncpy(env_str, event, UEVENT_BUF_SIZE); - kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); - - dev_info(cm->dev, event); -} - -/** - * _cm_monitor - Monitor the temperature and return true for exceptions. - * @cm: the Charger Manager representing the battery. - * - * Returns true if there is an event to notify for the battery. - * (True if the status of "emergency_stop" changes) - */ -static bool _cm_monitor(struct charger_manager *cm) -{ - struct charger_desc *desc = cm->desc; - int temp = desc->temperature_out_of_range(&cm->last_temp_mC); - - dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", - cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); - - /* It has been stopped or charging already */ - if (!!temp == !!cm->emergency_stop) - return false; - - if (temp) { - cm->emergency_stop = temp; - if (!try_charger_enable(cm, false)) { - if (temp > 0) - uevent_notify(cm, "OVERHEAT"); - else - uevent_notify(cm, "COLD"); - } - } else { - cm->emergency_stop = 0; - if (!try_charger_enable(cm, true)) - uevent_notify(cm, "CHARGING"); - } - - return true; -} - -/** - * cm_monitor - Monitor every battery. - * - * Returns true if there is an event to notify from any of the batteries. - * (True if the status of "emergency_stop" changes) - */ -static bool cm_monitor(void) -{ - bool stop = false; - struct charger_manager *cm; - - mutex_lock(&cm_list_mtx); - - list_for_each_entry(cm, &cm_list, entry) { - if (_cm_monitor(cm)) - stop = true; - } - - mutex_unlock(&cm_list_mtx); - - return stop; -} - -static int charger_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct charger_manager *cm = container_of(psy, - struct charger_manager, charger_psy); - struct charger_desc *desc = cm->desc; - int ret = 0; - int uV; - - switch (psp) { - case POWER_SUPPLY_PROP_STATUS: - if (is_charging(cm)) - val->intval = POWER_SUPPLY_STATUS_CHARGING; - else if (is_ext_pwr_online(cm)) - val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; - else - val->intval = POWER_SUPPLY_STATUS_DISCHARGING; - break; - case POWER_SUPPLY_PROP_HEALTH: - if (cm->emergency_stop > 0) - val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; - else if (cm->emergency_stop < 0) - val->intval = POWER_SUPPLY_HEALTH_COLD; - else - val->intval = POWER_SUPPLY_HEALTH_GOOD; - break; - case POWER_SUPPLY_PROP_PRESENT: - if (is_batt_present(cm)) - val->intval = 1; - else - val->intval = 0; - break; - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - ret = get_batt_uV(cm, &val->intval); - break; - case POWER_SUPPLY_PROP_CURRENT_NOW: - ret = cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CURRENT_NOW, val); - break; - case POWER_SUPPLY_PROP_TEMP: - /* in thenth of centigrade */ - if (cm->last_temp_mC == INT_MIN) - desc->temperature_out_of_range(&cm->last_temp_mC); - val->intval = cm->last_temp_mC / 100; - if (!desc->measure_battery_temp) - ret = -ENODEV; - break; - case POWER_SUPPLY_PROP_TEMP_AMBIENT: - /* in thenth of centigrade */ - if (cm->last_temp_mC == INT_MIN) - desc->temperature_out_of_range(&cm->last_temp_mC); - val->intval = cm->last_temp_mC / 100; - if (desc->measure_battery_temp) - ret = -ENODEV; - break; - case POWER_SUPPLY_PROP_CAPACITY: - if (!cm->fuel_gauge) { - ret = -ENODEV; - break; - } - - if (!is_batt_present(cm)) { - /* There is no battery. Assume 100% */ - val->intval = 100; - break; - } - - ret = cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CAPACITY, val); - if (ret) - break; - - if (val->intval > 100) { - val->intval = 100; - break; - } - if (val->intval < 0) - val->intval = 0; - - /* Do not adjust SOC when charging: voltage is overrated */ - if (is_charging(cm)) - break; - - /* - * If the capacity value is inconsistent, calibrate it base on - * the battery voltage values and the thresholds given as desc - */ - ret = get_batt_uV(cm, &uV); - if (ret) { - /* Voltage information not available. No calibration */ - ret = 0; - break; - } - - if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && - !is_charging(cm)) { - val->intval = 100; - break; - } - - break; - case POWER_SUPPLY_PROP_ONLINE: - if (is_ext_pwr_online(cm)) - val->intval = 1; - else - val->intval = 0; - break; - case POWER_SUPPLY_PROP_CHARGE_FULL: - if (cm->fuel_gauge) { - if (cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0) - break; - } - - if (is_ext_pwr_online(cm)) { - /* Not full if it's charging. */ - if (is_charging(cm)) { - val->intval = 0; - break; - } - /* - * Full if it's powered but not charging andi - * not forced stop by emergency - */ - if (!cm->emergency_stop) { - val->intval = 1; - break; - } - } - - /* Full if it's over the fullbatt voltage */ - ret = get_batt_uV(cm, &uV); - if (!ret && desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && - !is_charging(cm)) { - val->intval = 1; - break; - } - - /* Full if the cap is 100 */ - if (cm->fuel_gauge) { - ret = cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CAPACITY, val); - if (!ret && val->intval >= 100 && !is_charging(cm)) { - val->intval = 1; - break; - } - } - - val->intval = 0; - ret = 0; - break; - case POWER_SUPPLY_PROP_CHARGE_NOW: - if (is_charging(cm)) { - ret = cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CHARGE_NOW, - val); - if (ret) { - val->intval = 1; - ret = 0; - } else { - /* If CHARGE_NOW is supplied, use it */ - val->intval = (val->intval > 0) ? - val->intval : 1; - } - } else { - val->intval = 0; - } - break; - default: - return -EINVAL; - } - return ret; -} - -#define NUM_CHARGER_PSY_OPTIONAL (4) -static enum power_supply_property default_charger_props[] = { - /* Guaranteed to provide */ - POWER_SUPPLY_PROP_STATUS, - POWER_SUPPLY_PROP_HEALTH, - POWER_SUPPLY_PROP_PRESENT, - POWER_SUPPLY_PROP_VOLTAGE_NOW, - POWER_SUPPLY_PROP_CAPACITY, - POWER_SUPPLY_PROP_ONLINE, - POWER_SUPPLY_PROP_CHARGE_FULL, - /* - * Optional properties are: - * POWER_SUPPLY_PROP_CHARGE_NOW, - * POWER_SUPPLY_PROP_CURRENT_NOW, - * POWER_SUPPLY_PROP_TEMP, and - * POWER_SUPPLY_PROP_TEMP_AMBIENT, - */ -}; - -static struct power_supply psy_default = { - .name = "battery", - .type = POWER_SUPPLY_TYPE_BATTERY, - .properties = default_charger_props, - .num_properties = ARRAY_SIZE(default_charger_props), - .get_property = charger_get_property, -}; - -/** - * cm_setup_timer - For in-suspend monitoring setup wakeup alarm - * for suspend_again. - * - * Returns true if the alarm is set for Charger Manager to use. - * Returns false if - * cm_setup_timer fails to set an alarm, - * cm_setup_timer does not need to set an alarm for Charger Manager, - * or an alarm previously configured is to be used. - */ -static bool cm_setup_timer(void) -{ - struct charger_manager *cm; - unsigned int wakeup_ms = UINT_MAX; - bool ret = false; - - mutex_lock(&cm_list_mtx); - - list_for_each_entry(cm, &cm_list, entry) { - /* Skip if polling is not required for this CM */ - if (!is_polling_required(cm) && !cm->emergency_stop) - continue; - if (cm->desc->polling_interval_ms == 0) - continue; - CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms); - } - - mutex_unlock(&cm_list_mtx); - - if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { - pr_info("Charger Manager wakeup timer: %u ms.\n", wakeup_ms); - if (rtc_dev) { - struct rtc_wkalrm tmp; - unsigned long time, now; - unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000); - - /* - * Set alarm with the polling interval (wakeup_ms) - * except when rtc_wkalarm_save comes first. - * However, the alarm time should be NOW + - * CM_RTC_SMALL or later. - */ - tmp.enabled = 1; - rtc_read_time(rtc_dev, &tmp.time); - rtc_tm_to_time(&tmp.time, &now); - if (add < CM_RTC_SMALL) - add = CM_RTC_SMALL; - time = now + add; - - ret = true; - - if (rtc_wkalarm_save.enabled && - rtc_wkalarm_save_time && - rtc_wkalarm_save_time < time) { - if (rtc_wkalarm_save_time < now + CM_RTC_SMALL) - time = now + CM_RTC_SMALL; - else - time = rtc_wkalarm_save_time; - - /* The timer is not appointed by CM */ - ret = false; - } - - pr_info("Waking up after %lu secs.\n", - time - now); - - rtc_time_to_tm(time, &tmp.time); - rtc_set_alarm(rtc_dev, &tmp); - cm_suspend_duration_ms += wakeup_ms; - return ret; - } - } - - if (rtc_dev) - rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); - return false; -} - -/** - * cm_suspend_again - Determine whether suspend again or not - * - * Returns true if the system should be suspended again - * Returns false if the system should be woken up - */ -bool cm_suspend_again(void) -{ - struct charger_manager *cm; - bool ret = false; - - if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() || - !cm_rtc_set) - return false; - - if (cm_monitor()) - goto out; - - ret = true; - mutex_lock(&cm_list_mtx); - list_for_each_entry(cm, &cm_list, entry) { - if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || - cm->status_save_batt != is_batt_present(cm)) { - ret = false; - break; - } - } - mutex_unlock(&cm_list_mtx); - - cm_rtc_set = cm_setup_timer(); -out: - /* It's about the time when the non-CM appointed timer goes off */ - if (rtc_wkalarm_save.enabled) { - unsigned long now; - struct rtc_time tmp; - - rtc_read_time(rtc_dev, &tmp); - rtc_tm_to_time(&tmp, &now); - - if (rtc_wkalarm_save_time && - now + CM_RTC_SMALL >= rtc_wkalarm_save_time) - return false; - } - return ret; -} -EXPORT_SYMBOL_GPL(cm_suspend_again); - -/** - * setup_charger_manager - initialize charger_global_desc data - * @gd: pointer to instance of charger_global_desc - */ -int setup_charger_manager(struct charger_global_desc *gd) -{ - if (!gd) - return -EINVAL; - - if (rtc_dev) - rtc_class_close(rtc_dev); - rtc_dev = NULL; - g_desc = NULL; - - if (!gd->rtc_only_wakeup) { - pr_err("The callback rtc_only_wakeup is not given.\n"); - return -EINVAL; - } - - if (gd->rtc_name) { - rtc_dev = rtc_class_open(gd->rtc_name); - if (IS_ERR_OR_NULL(rtc_dev)) { - rtc_dev = NULL; - /* Retry at probe. RTC may be not registered yet */ - } - } else { - pr_warn("No wakeup timer is given for charger manager." - "In-suspend monitoring won't work.\n"); - } - - g_desc = gd; - return 0; -} -EXPORT_SYMBOL_GPL(setup_charger_manager); - -static int charger_manager_probe(struct platform_device *pdev) -{ - struct charger_desc *desc = dev_get_platdata(&pdev->dev); - struct charger_manager *cm; - int ret = 0, i = 0; - union power_supply_propval val; - - if (g_desc && !rtc_dev && g_desc->rtc_name) { - rtc_dev = rtc_class_open(g_desc->rtc_name); - if (IS_ERR_OR_NULL(rtc_dev)) { - rtc_dev = NULL; - dev_err(&pdev->dev, "Cannot get RTC %s.\n", - g_desc->rtc_name); - ret = -ENODEV; - goto err_alloc; - } - } - - if (!desc) { - dev_err(&pdev->dev, "No platform data (desc) found.\n"); - ret = -ENODEV; - goto err_alloc; - } - - cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL); - if (!cm) { - dev_err(&pdev->dev, "Cannot allocate memory.\n"); - ret = -ENOMEM; - goto err_alloc; - } - - /* Basic Values. Unspecified are Null or 0 */ - cm->dev = &pdev->dev; - cm->desc = kzalloc(sizeof(struct charger_desc), GFP_KERNEL); - if (!cm->desc) { - dev_err(&pdev->dev, "Cannot allocate memory.\n"); - ret = -ENOMEM; - goto err_alloc_desc; - } - memcpy(cm->desc, desc, sizeof(struct charger_desc)); - cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */ - - if (!desc->charger_regulators || desc->num_charger_regulators < 1) { - ret = -EINVAL; - dev_err(&pdev->dev, "charger_regulators undefined.\n"); - goto err_no_charger; - } - - if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { - dev_err(&pdev->dev, "No power supply defined.\n"); - ret = -EINVAL; - goto err_no_charger_stat; - } - - /* Counting index only */ - while (desc->psy_charger_stat[i]) - i++; - - cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1), - GFP_KERNEL); - if (!cm->charger_stat) { - ret = -ENOMEM; - goto err_no_charger_stat; - } - - for (i = 0; desc->psy_charger_stat[i]; i++) { - cm->charger_stat[i] = power_supply_get_by_name( - desc->psy_charger_stat[i]); - if (!cm->charger_stat[i]) { - dev_err(&pdev->dev, "Cannot find power supply " - "\"%s\"\n", - desc->psy_charger_stat[i]); - ret = -ENODEV; - goto err_chg_stat; - } - } - - cm->fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); - if (!cm->fuel_gauge) { - dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", - desc->psy_fuel_gauge); - ret = -ENODEV; - goto err_chg_stat; - } - - if (desc->polling_interval_ms == 0 || - msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { - dev_err(&pdev->dev, "polling_interval_ms is too small\n"); - ret = -EINVAL; - goto err_chg_stat; - } - - if (!desc->temperature_out_of_range) { - dev_err(&pdev->dev, "there is no temperature_out_of_range\n"); - ret = -EINVAL; - goto err_chg_stat; - } - - platform_set_drvdata(pdev, cm); - - memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default)); - - if (!desc->psy_name) { - strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX); - } else { - strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); - } - cm->charger_psy.name = cm->psy_name_buf; - - /* Allocate for psy properties because they may vary */ - cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property) - * (ARRAY_SIZE(default_charger_props) + - NUM_CHARGER_PSY_OPTIONAL), - GFP_KERNEL); - if (!cm->charger_psy.properties) { - dev_err(&pdev->dev, "Cannot allocate for psy properties.\n"); - ret = -ENOMEM; - goto err_chg_stat; - } - memcpy(cm->charger_psy.properties, default_charger_props, - sizeof(enum power_supply_property) * - ARRAY_SIZE(default_charger_props)); - cm->charger_psy.num_properties = psy_default.num_properties; - - /* Find which optional psy-properties are available */ - if (!cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CHARGE_NOW, &val)) { - cm->charger_psy.properties[cm->charger_psy.num_properties] = - POWER_SUPPLY_PROP_CHARGE_NOW; - cm->charger_psy.num_properties++; - } - if (!cm->fuel_gauge->get_property(cm->fuel_gauge, - POWER_SUPPLY_PROP_CURRENT_NOW, - &val)) { - cm->charger_psy.properties[cm->charger_psy.num_properties] = - POWER_SUPPLY_PROP_CURRENT_NOW; - cm->charger_psy.num_properties++; - } - - if (desc->measure_battery_temp) { - cm->charger_psy.properties[cm->charger_psy.num_properties] = - POWER_SUPPLY_PROP_TEMP; - cm->charger_psy.num_properties++; - } else { - cm->charger_psy.properties[cm->charger_psy.num_properties] = - POWER_SUPPLY_PROP_TEMP_AMBIENT; - cm->charger_psy.num_properties++; - } - - ret = power_supply_register(NULL, &cm->charger_psy); - if (ret) { - dev_err(&pdev->dev, "Cannot register charger-manager with" - " name \"%s\".\n", cm->charger_psy.name); - goto err_register; - } - - ret = regulator_bulk_get(&pdev->dev, desc->num_charger_regulators, - desc->charger_regulators); - if (ret) { - dev_err(&pdev->dev, "Cannot get charger regulators.\n"); - goto err_bulk_get; - } - - ret = try_charger_enable(cm, true); - if (ret) { - dev_err(&pdev->dev, "Cannot enable charger regulators\n"); - goto err_chg_enable; - } - - /* Add to the list */ - mutex_lock(&cm_list_mtx); - list_add(&cm->entry, &cm_list); - mutex_unlock(&cm_list_mtx); - - return 0; - -err_chg_enable: - regulator_bulk_free(desc->num_charger_regulators, - desc->charger_regulators); -err_bulk_get: - power_supply_unregister(&cm->charger_psy); -err_register: - kfree(cm->charger_psy.properties); -err_chg_stat: - kfree(cm->charger_stat); -err_no_charger_stat: -err_no_charger: - kfree(cm->desc); -err_alloc_desc: - kfree(cm); -err_alloc: - return ret; -} - -static int __devexit charger_manager_remove(struct platform_device *pdev) -{ - struct charger_manager *cm = platform_get_drvdata(pdev); - struct charger_desc *desc = cm->desc; - - /* Remove from the list */ - mutex_lock(&cm_list_mtx); - list_del(&cm->entry); - mutex_unlock(&cm_list_mtx); - - regulator_bulk_free(desc->num_charger_regulators, - desc->charger_regulators); - power_supply_unregister(&cm->charger_psy); - kfree(cm->charger_psy.properties); - kfree(cm->charger_stat); - kfree(cm->desc); - kfree(cm); - - return 0; -} - -static const struct platform_device_id charger_manager_id[] = { - { "charger-manager", 0 }, - { }, -}; -MODULE_DEVICE_TABLE(platform, charger_manager_id); - -static int cm_suspend_prepare(struct device *dev) -{ - struct charger_manager *cm = dev_get_drvdata(dev); - - if (!cm_suspended) { - if (rtc_dev) { - struct rtc_time tmp; - unsigned long now; - - rtc_read_alarm(rtc_dev, &rtc_wkalarm_save); - rtc_read_time(rtc_dev, &tmp); - - if (rtc_wkalarm_save.enabled) { - rtc_tm_to_time(&rtc_wkalarm_save.time, - &rtc_wkalarm_save_time); - rtc_tm_to_time(&tmp, &now); - if (now > rtc_wkalarm_save_time) - rtc_wkalarm_save_time = 0; - } else { - rtc_wkalarm_save_time = 0; - } - } - cm_suspended = true; - } - - cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); - cm->status_save_batt = is_batt_present(cm); - - if (!cm_rtc_set) { - cm_suspend_duration_ms = 0; - cm_rtc_set = cm_setup_timer(); - } - - return 0; -} - -static void cm_suspend_complete(struct device *dev) -{ - struct charger_manager *cm = dev_get_drvdata(dev); - - if (cm_suspended) { - if (rtc_dev) { - struct rtc_wkalrm tmp; - - rtc_read_alarm(rtc_dev, &tmp); - rtc_wkalarm_save.pending = tmp.pending; - rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); - } - cm_suspended = false; - cm_rtc_set = false; - } - - uevent_notify(cm, NULL); -} - -static const struct dev_pm_ops charger_manager_pm = { - .prepare = cm_suspend_prepare, - .complete = cm_suspend_complete, -}; - -static struct platform_driver charger_manager_driver = { - .driver = { - .name = "charger-manager", - .owner = THIS_MODULE, - .pm = &charger_manager_pm, - }, - .probe = charger_manager_probe, - .remove = __devexit_p(charger_manager_remove), - .id_table = charger_manager_id, -}; - -static int __init charger_manager_init(void) -{ - return platform_driver_register(&charger_manager_driver); -} -late_initcall(charger_manager_init); - -static void __exit charger_manager_cleanup(void) -{ - platform_driver_unregister(&charger_manager_driver); -} -module_exit(charger_manager_cleanup); - -MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); -MODULE_DESCRIPTION("Charger Manager"); -MODULE_LICENSE("GPL"); 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