![Anton Vorontsov](/assets/img/avatar_default.png)
This patch fixes the following warning and makes the code a little bit more simpler: CC drivers/power/charger-manager.o charger-manager.c: In function 'charger_get_property': charger-manager.c:429:15: warning: 'i' may be used uninitialized in this function [-Wuninitialized] Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
1064 lines
26 KiB
C
1064 lines
26 KiB
C
/*
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* Copyright (C) 2011 Samsung Electronics Co., Ltd.
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* MyungJoo Ham <myungjoo.ham@samsung.com>
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*
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* This driver enables to monitor battery health and control charger
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* during suspend-to-mem.
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* Charger manager depends on other devices. register this later than
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* the depending devices.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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**/
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/rtc.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/platform_device.h>
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#include <linux/power/charger-manager.h>
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#include <linux/regulator/consumer.h>
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/*
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* Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for
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* delayed works so that we can run delayed works with CM_JIFFIES_SMALL
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* without any delays.
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*/
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#define CM_JIFFIES_SMALL (2)
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/* If y is valid (> 0) and smaller than x, do x = y */
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#define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x))
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/*
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* Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking
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* rtc alarm. It should be 2 or larger
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*/
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#define CM_RTC_SMALL (2)
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#define UEVENT_BUF_SIZE 32
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static LIST_HEAD(cm_list);
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static DEFINE_MUTEX(cm_list_mtx);
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/* About in-suspend (suspend-again) monitoring */
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static struct rtc_device *rtc_dev;
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/*
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* Backup RTC alarm
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* Save the wakeup alarm before entering suspend-to-RAM
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*/
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static struct rtc_wkalrm rtc_wkalarm_save;
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/* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */
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static unsigned long rtc_wkalarm_save_time;
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static bool cm_suspended;
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static bool cm_rtc_set;
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static unsigned long cm_suspend_duration_ms;
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/* Global charger-manager description */
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static struct charger_global_desc *g_desc; /* init with setup_charger_manager */
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/**
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* is_batt_present - See if the battery presents in place.
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* @cm: the Charger Manager representing the battery.
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*/
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static bool is_batt_present(struct charger_manager *cm)
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{
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union power_supply_propval val;
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bool present = false;
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int i, ret;
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switch (cm->desc->battery_present) {
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case CM_FUEL_GAUGE:
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ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_PRESENT, &val);
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if (ret == 0 && val.intval)
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present = true;
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break;
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case CM_CHARGER_STAT:
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for (i = 0; cm->charger_stat[i]; i++) {
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ret = cm->charger_stat[i]->get_property(
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cm->charger_stat[i],
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POWER_SUPPLY_PROP_PRESENT, &val);
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if (ret == 0 && val.intval) {
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present = true;
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break;
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}
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}
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break;
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}
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return present;
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}
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/**
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* is_ext_pwr_online - See if an external power source is attached to charge
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* @cm: the Charger Manager representing the battery.
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*
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* Returns true if at least one of the chargers of the battery has an external
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* power source attached to charge the battery regardless of whether it is
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* actually charging or not.
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*/
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static bool is_ext_pwr_online(struct charger_manager *cm)
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{
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union power_supply_propval val;
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bool online = false;
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int i, ret;
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/* If at least one of them has one, it's yes. */
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for (i = 0; cm->charger_stat[i]; i++) {
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ret = cm->charger_stat[i]->get_property(
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cm->charger_stat[i],
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POWER_SUPPLY_PROP_ONLINE, &val);
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if (ret == 0 && val.intval) {
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online = true;
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break;
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}
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}
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return online;
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}
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/**
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* get_batt_uV - Get the voltage level of the battery
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* @cm: the Charger Manager representing the battery.
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* @uV: the voltage level returned.
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*
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* Returns 0 if there is no error.
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* Returns a negative value on error.
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*/
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static int get_batt_uV(struct charger_manager *cm, int *uV)
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{
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union power_supply_propval val;
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int ret;
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if (!cm->fuel_gauge)
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return -ENODEV;
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ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
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if (ret)
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return ret;
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*uV = val.intval;
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return 0;
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}
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/**
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* is_charging - Returns true if the battery is being charged.
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* @cm: the Charger Manager representing the battery.
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*/
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static bool is_charging(struct charger_manager *cm)
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{
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int i, ret;
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bool charging = false;
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union power_supply_propval val;
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/* If there is no battery, it cannot be charged */
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if (!is_batt_present(cm))
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return false;
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/* If at least one of the charger is charging, return yes */
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for (i = 0; cm->charger_stat[i]; i++) {
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/* 1. The charger sholuld not be DISABLED */
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if (cm->emergency_stop)
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continue;
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if (!cm->charger_enabled)
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continue;
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/* 2. The charger should be online (ext-power) */
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ret = cm->charger_stat[i]->get_property(
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cm->charger_stat[i],
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POWER_SUPPLY_PROP_ONLINE, &val);
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if (ret) {
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dev_warn(cm->dev, "Cannot read ONLINE value from %s.\n",
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cm->desc->psy_charger_stat[i]);
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continue;
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}
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if (val.intval == 0)
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continue;
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/*
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* 3. The charger should not be FULL, DISCHARGING,
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* or NOT_CHARGING.
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*/
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ret = cm->charger_stat[i]->get_property(
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cm->charger_stat[i],
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POWER_SUPPLY_PROP_STATUS, &val);
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if (ret) {
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dev_warn(cm->dev, "Cannot read STATUS value from %s.\n",
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cm->desc->psy_charger_stat[i]);
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continue;
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}
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if (val.intval == POWER_SUPPLY_STATUS_FULL ||
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val.intval == POWER_SUPPLY_STATUS_DISCHARGING ||
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val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING)
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continue;
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/* Then, this is charging. */
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charging = true;
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break;
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}
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return charging;
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}
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/**
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* is_polling_required - Return true if need to continue polling for this CM.
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* @cm: the Charger Manager representing the battery.
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*/
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static bool is_polling_required(struct charger_manager *cm)
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{
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switch (cm->desc->polling_mode) {
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case CM_POLL_DISABLE:
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return false;
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case CM_POLL_ALWAYS:
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return true;
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case CM_POLL_EXTERNAL_POWER_ONLY:
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return is_ext_pwr_online(cm);
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case CM_POLL_CHARGING_ONLY:
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return is_charging(cm);
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default:
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dev_warn(cm->dev, "Incorrect polling_mode (%d)\n",
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cm->desc->polling_mode);
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}
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return false;
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}
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/**
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* try_charger_enable - Enable/Disable chargers altogether
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* @cm: the Charger Manager representing the battery.
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* @enable: true: enable / false: disable
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*
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* Note that Charger Manager keeps the charger enabled regardless whether
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* the charger is charging or not (because battery is full or no external
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* power source exists) except when CM needs to disable chargers forcibly
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* bacause of emergency causes; when the battery is overheated or too cold.
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*/
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static int try_charger_enable(struct charger_manager *cm, bool enable)
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{
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int err = 0, i;
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struct charger_desc *desc = cm->desc;
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/* Ignore if it's redundent command */
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if (enable == cm->charger_enabled)
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return 0;
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if (enable) {
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if (cm->emergency_stop)
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return -EAGAIN;
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err = regulator_bulk_enable(desc->num_charger_regulators,
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desc->charger_regulators);
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} else {
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/*
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* Abnormal battery state - Stop charging forcibly,
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* even if charger was enabled at the other places
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*/
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err = regulator_bulk_disable(desc->num_charger_regulators,
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desc->charger_regulators);
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for (i = 0; i < desc->num_charger_regulators; i++) {
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if (regulator_is_enabled(
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desc->charger_regulators[i].consumer)) {
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regulator_force_disable(
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desc->charger_regulators[i].consumer);
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dev_warn(cm->dev,
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"Disable regulator(%s) forcibly.\n",
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desc->charger_regulators[i].supply);
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}
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}
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}
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if (!err)
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cm->charger_enabled = enable;
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return err;
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}
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/**
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* uevent_notify - Let users know something has changed.
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* @cm: the Charger Manager representing the battery.
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* @event: the event string.
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*
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* If @event is null, it implies that uevent_notify is called
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* by resume function. When called in the resume function, cm_suspended
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* should be already reset to false in order to let uevent_notify
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* notify the recent event during the suspend to users. While
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* suspended, uevent_notify does not notify users, but tracks
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* events so that uevent_notify can notify users later after resumed.
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*/
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static void uevent_notify(struct charger_manager *cm, const char *event)
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{
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static char env_str[UEVENT_BUF_SIZE + 1] = "";
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static char env_str_save[UEVENT_BUF_SIZE + 1] = "";
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if (cm_suspended) {
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/* Nothing in suspended-event buffer */
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if (env_str_save[0] == 0) {
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if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
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return; /* status not changed */
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strncpy(env_str_save, event, UEVENT_BUF_SIZE);
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return;
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}
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if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE))
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return; /* Duplicated. */
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strncpy(env_str_save, event, UEVENT_BUF_SIZE);
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return;
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}
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if (event == NULL) {
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/* No messages pending */
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if (!env_str_save[0])
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return;
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strncpy(env_str, env_str_save, UEVENT_BUF_SIZE);
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kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
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env_str_save[0] = 0;
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return;
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}
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/* status not changed */
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if (!strncmp(env_str, event, UEVENT_BUF_SIZE))
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return;
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/* save the status and notify the update */
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strncpy(env_str, event, UEVENT_BUF_SIZE);
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kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
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dev_info(cm->dev, event);
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}
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/**
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* _cm_monitor - Monitor the temperature and return true for exceptions.
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* @cm: the Charger Manager representing the battery.
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*
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* Returns true if there is an event to notify for the battery.
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* (True if the status of "emergency_stop" changes)
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*/
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static bool _cm_monitor(struct charger_manager *cm)
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{
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struct charger_desc *desc = cm->desc;
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int temp = desc->temperature_out_of_range(&cm->last_temp_mC);
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dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n",
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cm->last_temp_mC / 1000, cm->last_temp_mC % 1000);
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/* It has been stopped or charging already */
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if (!!temp == !!cm->emergency_stop)
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return false;
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if (temp) {
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cm->emergency_stop = temp;
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if (!try_charger_enable(cm, false)) {
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if (temp > 0)
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uevent_notify(cm, "OVERHEAT");
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else
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uevent_notify(cm, "COLD");
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}
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} else {
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cm->emergency_stop = 0;
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if (!try_charger_enable(cm, true))
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uevent_notify(cm, "CHARGING");
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}
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return true;
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}
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/**
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* cm_monitor - Monitor every battery.
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*
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* Returns true if there is an event to notify from any of the batteries.
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* (True if the status of "emergency_stop" changes)
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*/
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static bool cm_monitor(void)
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{
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bool stop = false;
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struct charger_manager *cm;
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mutex_lock(&cm_list_mtx);
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list_for_each_entry(cm, &cm_list, entry) {
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if (_cm_monitor(cm))
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stop = true;
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}
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mutex_unlock(&cm_list_mtx);
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return stop;
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}
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static int charger_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct charger_manager *cm = container_of(psy,
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struct charger_manager, charger_psy);
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struct charger_desc *desc = cm->desc;
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int ret = 0;
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int uV;
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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if (is_charging(cm))
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val->intval = POWER_SUPPLY_STATUS_CHARGING;
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else if (is_ext_pwr_online(cm))
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val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
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else
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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break;
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case POWER_SUPPLY_PROP_HEALTH:
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if (cm->emergency_stop > 0)
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val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
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else if (cm->emergency_stop < 0)
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val->intval = POWER_SUPPLY_HEALTH_COLD;
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else
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val->intval = POWER_SUPPLY_HEALTH_GOOD;
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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if (is_batt_present(cm))
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val->intval = 1;
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else
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val->intval = 0;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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ret = get_batt_uV(cm, &val->intval);
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_CURRENT_NOW, val);
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break;
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case POWER_SUPPLY_PROP_TEMP:
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/* in thenth of centigrade */
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if (cm->last_temp_mC == INT_MIN)
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desc->temperature_out_of_range(&cm->last_temp_mC);
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val->intval = cm->last_temp_mC / 100;
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if (!desc->measure_battery_temp)
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ret = -ENODEV;
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break;
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case POWER_SUPPLY_PROP_TEMP_AMBIENT:
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/* in thenth of centigrade */
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if (cm->last_temp_mC == INT_MIN)
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desc->temperature_out_of_range(&cm->last_temp_mC);
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val->intval = cm->last_temp_mC / 100;
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if (desc->measure_battery_temp)
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ret = -ENODEV;
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break;
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case POWER_SUPPLY_PROP_CAPACITY:
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if (!cm->fuel_gauge) {
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ret = -ENODEV;
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break;
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}
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if (!is_batt_present(cm)) {
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/* There is no battery. Assume 100% */
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val->intval = 100;
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break;
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}
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ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_CAPACITY, val);
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if (ret)
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break;
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if (val->intval > 100) {
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val->intval = 100;
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break;
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}
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if (val->intval < 0)
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val->intval = 0;
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/* Do not adjust SOC when charging: voltage is overrated */
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if (is_charging(cm))
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break;
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/*
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* If the capacity value is inconsistent, calibrate it base on
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* the battery voltage values and the thresholds given as desc
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*/
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ret = get_batt_uV(cm, &uV);
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if (ret) {
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/* Voltage information not available. No calibration */
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ret = 0;
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break;
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}
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if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV &&
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!is_charging(cm)) {
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val->intval = 100;
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break;
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}
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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if (is_ext_pwr_online(cm))
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val->intval = 1;
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else
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val->intval = 0;
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break;
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case POWER_SUPPLY_PROP_CHARGE_FULL:
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if (cm->fuel_gauge) {
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if (cm->fuel_gauge->get_property(cm->fuel_gauge,
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POWER_SUPPLY_PROP_CHARGE_FULL, val) == 0)
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break;
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}
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if (is_ext_pwr_online(cm)) {
|
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/* Not full if it's charging. */
|
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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");
|