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@ -1,11 +1,13 @@ |
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/*
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* Battery measurement code for Ingenic JZ SOC. |
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* |
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* Copyright (C) 2009 Jiejing Zhang <kzjeef@gmail.com> |
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* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> |
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* |
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* based on tosa_battery.c |
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* |
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* Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com> |
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* Copyright (C) 2009 Jiejing Zhang <kzjeef@gmail.com> |
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* |
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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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@ -19,50 +21,56 @@ |
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#include <linux/interrupt.h> |
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#include <linux/platform_device.h> |
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#include <linux/gpio.h> |
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#include <linux/interrupt.h> |
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#include <linux/power/jz4740-battery.h> |
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#include <linux/jz4740-adc.h> |
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struct jz_battery_info { |
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struct power_supply bat; |
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int bat_status; |
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struct jz_batt_info *pdata; |
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struct mutex work_lock; |
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struct workqueue_struct *monitor_wqueue; |
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struct delayed_work bat_work; |
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}; |
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struct jz_battery { |
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struct jz_battery_platform_data *pdata; |
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int charge_irq; |
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#define ps_to_jz_battery(x) container_of((x), struct jz_battery_info, bat); |
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int status; |
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long voltage; |
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struct power_supply battery; |
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struct delayed_work work; |
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}; |
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/*********************************************************************
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* Battery properties |
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*********************************************************************/ |
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static inline struct jz_battery *psy_to_jz_battery(struct power_supply *psy) |
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{ |
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return container_of(psy, struct jz_battery, battery); |
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} |
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static long jz_read_bat(struct power_supply *psy) |
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static long jz_battery_read_voltage(struct jz_battery *jz_battery) |
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{ |
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struct jz_battery_info *bat_info = ps_to_jz_battery(psy); |
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struct device *adc = jz_battery->battery.dev->parent->parent; |
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enum jz_adc_battery_scale scale; |
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if (bat_info->pdata->max_voltag > 2500000) |
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if (jz_battery->pdata->info.voltage_max_design > 2500000) |
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scale = JZ_ADC_BATTERY_SCALE_7V5; |
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else |
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scale = JZ_ADC_BATTERY_SCALE_2V5; |
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return jz4740_adc_read_battery_voltage(psy->dev->parent->parent, scale); |
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return jz4740_adc_read_battery_voltage(adc, scale); |
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} |
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static int jz_bat_get_capacity(struct power_supply *psy) |
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static int jz_battery_get_capacity(struct power_supply *psy) |
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{ |
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struct jz_battery *jz_battery = psy_to_jz_battery(psy); |
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struct power_supply_info *info = &jz_battery->pdata->info; |
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long voltage; |
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int ret; |
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struct jz_battery_info *bat_info = ps_to_jz_battery(psy); |
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int voltage_span; |
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ret = jz_read_bat(psy); |
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voltage = jz_battery_read_voltage(jz_battery); |
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if (ret < 0) |
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return ret; |
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if (voltage < 0) |
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return voltage; |
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ret = (ret - bat_info->pdata->min_voltag) * 100 |
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/ (bat_info->pdata->max_voltag - bat_info->pdata->min_voltag); |
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voltage_span = info->voltage_max_design - info->voltage_min_design; |
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ret = ((voltage - info->voltage_min_design) * 100) / voltage_span; |
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if (ret > 100) |
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ret = 100; |
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@ -72,46 +80,41 @@ static int jz_bat_get_capacity(struct power_supply *psy) |
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return ret; |
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} |
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static int jz_bat_get_property(struct power_supply *psy, |
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static int jz_battery_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 jz_battery_info *bat_info = ps_to_jz_battery(psy) |
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struct jz_battery *jz_battery = psy_to_jz_battery(psy); |
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struct power_supply_info *info = &jz_battery->pdata->info; |
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long voltage; |
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switch (psp) { |
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case POWER_SUPPLY_PROP_STATUS: |
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val->intval = bat_info->bat_status; |
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val->intval = jz_battery->status; |
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break; |
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case POWER_SUPPLY_PROP_TECHNOLOGY: |
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val->intval = bat_info->pdata->batt_tech; |
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val->intval = jz_battery->pdata->info.technology; |
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break; |
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case POWER_SUPPLY_PROP_HEALTH: |
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if(jz_read_bat(psy) < bat_info->pdata->min_voltag) { |
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dev_dbg(psy->dev, "%s: battery is dead," |
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"voltage too low!\n", __func__); |
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voltage = jz_battery_read_voltage(jz_battery); |
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if (voltage < info->voltage_min_design) |
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val->intval = POWER_SUPPLY_HEALTH_DEAD; |
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} else { |
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dev_dbg(psy->dev, "%s: battery is good," |
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"voltage normal.\n", __func__); |
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else |
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val->intval = POWER_SUPPLY_HEALTH_GOOD; |
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} |
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break; |
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case POWER_SUPPLY_PROP_CAPACITY: |
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val->intval = jz_bat_get_capacity(psy); |
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dev_dbg(psy->dev, "%s: battery_capacity = %d\n", |
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__func__, val->intval); |
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val->intval = jz_battery_get_capacity(psy); |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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val->intval = jz_read_bat(psy); |
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val->intval = jz_battery_read_voltage(jz_battery); |
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if (val->intval < 0) |
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return val->intval; |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
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case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
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val->intval = bat_info->pdata->max_voltag; |
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val->intval = info->voltage_max_design; |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
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val->intval = bat_info->pdata->min_voltag; |
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val->intval = info->voltage_min_design; |
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break; |
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case POWER_SUPPLY_PROP_PRESENT: |
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val->intval = 1; |
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@ -122,210 +125,225 @@ static int jz_bat_get_property(struct power_supply *psy, |
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return 0; |
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} |
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static void jz_bat_external_power_changed(struct power_supply *psy) |
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static void jz_battery_external_power_changed(struct power_supply *psy) |
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{ |
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struct jz_battery_info *bat_info = ps_to_jz_battery(psy); |
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struct jz_battery *jz_battery = psy_to_jz_battery(psy); |
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cancel_delayed_work(&bat_info->bat_work); |
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queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ / 8); |
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cancel_delayed_work(&jz_battery->work); |
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schedule_delayed_work(&jz_battery->work, 0); |
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} |
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static char *status_text[] = { |
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[POWER_SUPPLY_STATUS_UNKNOWN] = "Unknown", |
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[POWER_SUPPLY_STATUS_CHARGING] = "Charging", |
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[POWER_SUPPLY_STATUS_DISCHARGING] = "Discharging", |
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[POWER_SUPPLY_STATUS_NOT_CHARGING] = "Not charging", |
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}; |
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static void jz_bat_update(struct power_supply *psy) |
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static irqreturn_t jz_battery_charge_irq(int irq, void *data) |
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{ |
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struct jz_battery_info *bat_info = ps_to_jz_battery(psy); |
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struct jz_battery *jz_battery = data; |
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int old_status = bat_info->bat_status; |
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static unsigned long old_batt_vol = 0; |
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unsigned long batt_vol = jz_read_bat(psy); |
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cancel_delayed_work(&jz_battery->work); |
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schedule_delayed_work(&jz_battery->work, 0); |
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mutex_lock(&bat_info->work_lock); |
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return IRQ_HANDLED; |
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} |
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if (gpio_is_valid(bat_info->pdata->charg_stat_gpio)) { |
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if(!gpio_get_value(bat_info->pdata->charg_stat_gpio)) |
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bat_info->bat_status = POWER_SUPPLY_STATUS_CHARGING; |
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static void jz_battery_update(struct jz_battery *jz_battery) |
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{ |
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int status; |
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long voltage; |
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long voltage_difference; |
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bool has_changed = 0; |
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if (gpio_is_valid(jz_battery->pdata->gpio_charge)) { |
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int is_charging; |
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is_charging = gpio_get_value(jz_battery->pdata->gpio_charge); |
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is_charging ^= jz_battery->pdata->gpio_charge_active_low; |
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if (is_charging) |
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status = POWER_SUPPLY_STATUS_CHARGING; |
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else |
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bat_info->bat_status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
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dev_dbg(psy->dev, "%s: battery status=%s\n", |
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__func__, status_text[bat_info->bat_status]); |
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if (old_status != bat_info->bat_status) { |
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dev_dbg(psy->dev, "%s %s -> %s\n", |
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psy->name, |
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status_text[old_status], |
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status_text[bat_info->bat_status]); |
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status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
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power_supply_changed(psy); |
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if (status != jz_battery->status) { |
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jz_battery->status = status; |
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has_changed = 1; |
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} |
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} |
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if (old_batt_vol - batt_vol > 50000) { |
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dev_dbg(psy->dev, "voltage change : %ld -> %ld\n", |
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old_batt_vol, batt_vol); |
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power_supply_changed(psy); |
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old_batt_vol = batt_vol; |
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voltage = jz_battery_read_voltage(jz_battery); |
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voltage_difference = voltage - jz_battery->voltage; |
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if (voltage_difference > 50000 || voltage_difference < 50000) { |
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jz_battery->voltage = voltage; |
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has_changed = 1; |
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} |
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mutex_unlock(&bat_info->work_lock); |
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if (has_changed) |
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power_supply_changed(&jz_battery->battery); |
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} |
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static enum power_supply_property jz_bat_main_props[] = { |
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static enum power_supply_property jz_battery_properties[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_TECHNOLOGY, |
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POWER_SUPPLY_PROP_HEALTH, |
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POWER_SUPPLY_PROP_CAPACITY, /* in percents! */ |
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POWER_SUPPLY_PROP_CAPACITY, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_VOLTAGE_MAX, |
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POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
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POWER_SUPPLY_PROP_PRESENT, |
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}; |
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struct power_supply bat_ps = { |
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.name = "battery", |
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.type = POWER_SUPPLY_TYPE_BATTERY, |
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.properties = jz_bat_main_props, |
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.num_properties = ARRAY_SIZE(jz_bat_main_props), |
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.get_property = jz_bat_get_property, |
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.external_power_changed = jz_bat_external_power_changed, |
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.use_for_apm = 1, |
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}; |
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static void jz_bat_work(struct work_struct *work) |
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static void jz_battery_work(struct work_struct *work) |
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{ |
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/* query interval too small will increase system workload*/ |
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/* Too small interval will increase system workload */ |
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const int interval = HZ * 30; |
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struct jz_battery_info *bat_info = container_of(work,struct jz_battery_info, bat_work.work); |
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jz_bat_update(&bat_info->bat); |
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queue_delayed_work(bat_info->monitor_wqueue, |
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&bat_info->bat_work, interval); |
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} |
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#ifdef CONFIG_PM |
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static int jz_bat_suspend(struct platform_device *pdev, pm_message_t state) |
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{ |
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struct jz_battery_info *bat_info = platform_get_drvdata(pdev); |
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bat_info->bat_status = POWER_SUPPLY_STATUS_UNKNOWN; |
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return 0; |
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} |
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static int jz_bat_resume(struct platform_device *pdev) |
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{ |
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struct jz_battery_info *bat_info = platform_get_drvdata(pdev); |
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bat_info->bat_status = POWER_SUPPLY_STATUS_UNKNOWN; |
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struct jz_battery *jz_battery = container_of(work, struct jz_battery, |
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work.work); |
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cancel_delayed_work(&bat_info->bat_work); |
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queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ/10); |
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return 0; |
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jz_battery_update(jz_battery); |
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schedule_delayed_work(&jz_battery->work, interval); |
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} |
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#else |
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#define jz_bat_suspend NULL |
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#define jz_bat_resume NULL |
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#endif |
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static int jz_bat_probe(struct platform_device *pdev) |
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static int jz_battery_probe(struct platform_device *pdev) |
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{ |
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int ret = 0; |
|
|
|
|
struct jz_battery_info *bat_info; |
|
|
|
|
struct jz_battery_platform_data *pdata = pdev->dev.platform_data; |
|
|
|
|
struct jz_battery *jz_battery; |
|
|
|
|
struct power_supply *battery; |
|
|
|
|
|
|
|
|
|
if (!pdev->dev.platform_data) { |
|
|
|
|
dev_err(&pdev->dev, "Please set battery info\n"); |
|
|
|
|
dev_err(&pdev->dev, "No platform data\n"); |
|
|
|
|
return -EINVAL; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
bat_info = kzalloc(sizeof(struct jz_battery_info), GFP_KERNEL); |
|
|
|
|
jz_battery = kzalloc(sizeof(*jz_battery), GFP_KERNEL); |
|
|
|
|
|
|
|
|
|
if (!bat_info) { |
|
|
|
|
if (!jz_battery) { |
|
|
|
|
dev_err(&pdev->dev, "Failed to allocate driver structure\n"); |
|
|
|
|
return -ENOMEM; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, bat_info); |
|
|
|
|
bat_info->pdata = pdev->dev.platform_data; |
|
|
|
|
bat_info->bat = bat_ps; |
|
|
|
|
mutex_init(&bat_info->work_lock); |
|
|
|
|
INIT_DELAYED_WORK(&bat_info->bat_work, jz_bat_work); |
|
|
|
|
battery = &jz_battery->battery; |
|
|
|
|
battery->name = pdata->info.name; |
|
|
|
|
battery->type = POWER_SUPPLY_TYPE_BATTERY; |
|
|
|
|
battery->properties = jz_battery_properties; |
|
|
|
|
battery->num_properties = ARRAY_SIZE(jz_battery_properties); |
|
|
|
|
battery->get_property = jz_battery_get_property; |
|
|
|
|
battery->external_power_changed = jz_battery_external_power_changed; |
|
|
|
|
battery->use_for_apm = 1; |
|
|
|
|
|
|
|
|
|
jz_battery->pdata = pdata; |
|
|
|
|
|
|
|
|
|
if (gpio_is_valid(bat_info->pdata->charg_stat_gpio)) { |
|
|
|
|
ret = gpio_request(bat_info->pdata->charg_stat_gpio, "CHARG STAT"); |
|
|
|
|
INIT_DELAYED_WORK(&jz_battery->work, jz_battery_work); |
|
|
|
|
|
|
|
|
|
if (gpio_is_valid(pdata->gpio_charge)) { |
|
|
|
|
ret = gpio_request(pdata->gpio_charge, dev_name(&pdev->dev)); |
|
|
|
|
if (ret) { |
|
|
|
|
dev_err(&pdev->dev, "charger state gpio request failed.\n"); |
|
|
|
|
goto err_charg_gpio_request; |
|
|
|
|
goto err_free; |
|
|
|
|
} |
|
|
|
|
ret = gpio_direction_input(bat_info->pdata->charg_stat_gpio); |
|
|
|
|
ret = gpio_direction_input(pdata->gpio_charge); |
|
|
|
|
if (ret) { |
|
|
|
|
dev_err(&pdev->dev, "charger state gpio set direction failed.\n"); |
|
|
|
|
goto err_charg_gpio_direction; |
|
|
|
|
goto err_free_gpio; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
ret = power_supply_register(&pdev->dev, &bat_info->bat); |
|
|
|
|
jz_battery->charge_irq = gpio_to_irq(pdata->gpio_charge); |
|
|
|
|
|
|
|
|
|
if (jz_battery->charge_irq >= 0) { |
|
|
|
|
ret = request_irq(jz_battery->charge_irq, |
|
|
|
|
jz_battery_charge_irq, |
|
|
|
|
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, |
|
|
|
|
dev_name(&pdev->dev), jz_battery); |
|
|
|
|
if (ret) { |
|
|
|
|
dev_err(&pdev->dev, "power supply battery register failed.\n"); |
|
|
|
|
goto err_power_register_bat; |
|
|
|
|
} else { |
|
|
|
|
bat_info->monitor_wqueue = create_singlethread_workqueue("jz_battery"); |
|
|
|
|
if (!bat_info->monitor_wqueue) { |
|
|
|
|
return -ESRCH; |
|
|
|
|
dev_err(&pdev->dev, "Failed to request charge irq: %d\n", ret); |
|
|
|
|
goto err_free_gpio; |
|
|
|
|
} |
|
|
|
|
queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ * 1); |
|
|
|
|
} |
|
|
|
|
} else { |
|
|
|
|
jz_battery->charge_irq = -1; |
|
|
|
|
} |
|
|
|
|
printk(KERN_INFO "jz_bat init success.\n"); |
|
|
|
|
return ret; |
|
|
|
|
|
|
|
|
|
err_power_register_bat: |
|
|
|
|
err_charg_gpio_direction: |
|
|
|
|
gpio_free(bat_info->pdata->charg_stat_gpio); |
|
|
|
|
err_charg_gpio_request: |
|
|
|
|
kfree(bat_info); |
|
|
|
|
|
|
|
|
|
ret = power_supply_register(&pdev->dev, &jz_battery->battery); |
|
|
|
|
if (ret) { |
|
|
|
|
dev_err(&pdev->dev, "power supply battery register failed.\n"); |
|
|
|
|
goto err_free_irq; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, jz_battery); |
|
|
|
|
schedule_delayed_work(&jz_battery->work, 0); |
|
|
|
|
|
|
|
|
|
return 0; |
|
|
|
|
|
|
|
|
|
err_free_irq: |
|
|
|
|
if (jz_battery->charge_irq >= 0) |
|
|
|
|
free_irq(jz_battery->charge_irq, jz_battery); |
|
|
|
|
err_free_gpio: |
|
|
|
|
if (gpio_is_valid(pdata->gpio_charge)) |
|
|
|
|
gpio_free(jz_battery->pdata->gpio_charge); |
|
|
|
|
err_free: |
|
|
|
|
kfree(jz_battery); |
|
|
|
|
return ret; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
static int jz_bat_remove(struct platform_device *pdev) |
|
|
|
|
static int jz_battery_remove(struct platform_device *pdev) |
|
|
|
|
{ |
|
|
|
|
struct jz_battery_info *bat_info = platform_get_drvdata(pdev); |
|
|
|
|
struct jz_battery *jz_battery = platform_get_drvdata(pdev); |
|
|
|
|
|
|
|
|
|
cancel_delayed_work_sync(&jz_battery->work); |
|
|
|
|
|
|
|
|
|
if (bat_info->pdata) { |
|
|
|
|
if (gpio_is_valid(bat_info->pdata->charg_stat_gpio)) |
|
|
|
|
gpio_free(bat_info->pdata->charg_stat_gpio); |
|
|
|
|
if (gpio_is_valid(jz_battery->pdata->gpio_charge)) { |
|
|
|
|
if (jz_battery->charge_irq >= 0) |
|
|
|
|
free_irq(jz_battery->charge_irq, jz_battery); |
|
|
|
|
gpio_free(jz_battery->pdata->gpio_charge); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
power_supply_unregister(&bat_ps); |
|
|
|
|
power_supply_unregister(&jz_battery->battery); |
|
|
|
|
|
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM |
|
|
|
|
static int jz_battery_suspend(struct platform_device *pdev, pm_message_t state) |
|
|
|
|
{ |
|
|
|
|
struct jz_battery *jz_battery = platform_get_drvdata(pdev); |
|
|
|
|
|
|
|
|
|
cancel_delayed_work_sync(&jz_battery->work); |
|
|
|
|
jz_battery->status = POWER_SUPPLY_STATUS_UNKNOWN; |
|
|
|
|
|
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
static struct platform_driver jz_bat_driver = { |
|
|
|
|
.probe = jz_bat_probe, |
|
|
|
|
.remove = __devexit_p(jz_bat_remove), |
|
|
|
|
.suspend = jz_bat_suspend, |
|
|
|
|
.resume = jz_bat_resume, |
|
|
|
|
static int jz_battery_resume(struct platform_device *pdev) |
|
|
|
|
{ |
|
|
|
|
struct jz_battery *jz_battery = platform_get_drvdata(pdev); |
|
|
|
|
|
|
|
|
|
schedule_delayed_work(&jz_battery->work, 0); |
|
|
|
|
|
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|
#else |
|
|
|
|
#define jz_battery_suspend NULL |
|
|
|
|
#define jz_battery_resume NULL |
|
|
|
|
#endif |
|
|
|
|
|
|
|
|
|
static struct platform_driver jz_battery_driver = { |
|
|
|
|
.probe = jz_battery_probe, |
|
|
|
|
.remove = __devexit_p(jz_battery_remove), |
|
|
|
|
.suspend = jz_battery_suspend, |
|
|
|
|
.resume = jz_battery_resume, |
|
|
|
|
.driver = { |
|
|
|
|
.name = "jz4740-battery", |
|
|
|
|
.owner = THIS_MODULE, |
|
|
|
|
}, |
|
|
|
|
}; |
|
|
|
|
|
|
|
|
|
static int __init jz_bat_init(void) |
|
|
|
|
static int __init jz_battery_init(void) |
|
|
|
|
{ |
|
|
|
|
return platform_driver_register(&jz_bat_driver); |
|
|
|
|
return platform_driver_register(&jz_battery_driver); |
|
|
|
|
} |
|
|
|
|
module_init(jz_bat_init); |
|
|
|
|
module_init(jz_battery_init); |
|
|
|
|
|
|
|
|
|
static void __exit jz_bat_exit(void) |
|
|
|
|
static void __exit jz_battery_exit(void) |
|
|
|
|
{ |
|
|
|
|
platform_driver_unregister(&jz_bat_driver); |
|
|
|
|
platform_driver_unregister(&jz_battery_driver); |
|
|
|
|
} |
|
|
|
|
module_exit(jz_bat_exit); |
|
|
|
|
module_exit(jz_battery_exit); |
|
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL"); |
|
|
|
|
MODULE_AUTHOR("Jiejing Zhang <kzjeef@gmail.com>"); |
|
|
|
|