/*
* Battery measurement code for Ingenic JZ SOC.
*
+ * Copyright (C) 2009 Jiejing Zhang <kzjeef@gmail.com>
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ *
* based on tosa_battery.c
*
* Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com>
- * Copyright (C) 2009 Jiejing Zhang <kzjeef@gmail.com>
- *
+*
* 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/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
+#include <linux/interrupt.h>
#include <linux/power/jz4740-battery.h>
#include <linux/jz4740-adc.h>
-struct jz_battery_info {
- struct power_supply bat;
- int bat_status;
- struct jz_batt_info *pdata;
- struct mutex work_lock;
- struct workqueue_struct *monitor_wqueue;
- struct delayed_work bat_work;
-};
+struct jz_battery {
+ struct jz_battery_platform_data *pdata;
+
+ int charge_irq;
-#define ps_to_jz_battery(x) container_of((x), struct jz_battery_info, bat);
+ int status;
+ long voltage;
-/*********************************************************************
- * Battery properties
- *********************************************************************/
+ struct power_supply battery;
+ struct delayed_work work;
+};
-static long jz_read_bat(struct power_supply *psy)
+static inline struct jz_battery *psy_to_jz_battery(struct power_supply *psy)
{
- struct jz_battery_info *bat_info = ps_to_jz_battery(psy);
+ return container_of(psy, struct jz_battery, battery);
+}
+
+static long jz_battery_read_voltage(struct jz_battery *jz_battery)
+{
+ struct device *adc = jz_battery->battery.dev->parent->parent;
enum jz_adc_battery_scale scale;
- if (bat_info->pdata->max_voltag > 2500000)
+ if (jz_battery->pdata->info.voltage_max_design > 2500000)
scale = JZ_ADC_BATTERY_SCALE_7V5;
else
scale = JZ_ADC_BATTERY_SCALE_2V5;
- return jz4740_adc_read_battery_voltage(psy->dev->parent->parent, scale);
+ return jz4740_adc_read_battery_voltage(adc, scale);
}
-static int jz_bat_get_capacity(struct power_supply *psy)
+static int jz_battery_get_capacity(struct power_supply *psy)
{
+ struct jz_battery *jz_battery = psy_to_jz_battery(psy);
+ struct power_supply_info *info = &jz_battery->pdata->info;
+ long voltage;
int ret;
- struct jz_battery_info *bat_info = ps_to_jz_battery(psy);
+ int voltage_span;
- ret = jz_read_bat(psy);
+ voltage = jz_battery_read_voltage(jz_battery);
- if (ret < 0)
- return ret;
+ if (voltage < 0)
+ return voltage;
- ret = (ret - bat_info->pdata->min_voltag) * 100
- / (bat_info->pdata->max_voltag - bat_info->pdata->min_voltag);
+ voltage_span = info->voltage_max_design - info->voltage_min_design;
+ ret = ((voltage - info->voltage_min_design) * 100) / voltage_span;
if (ret > 100)
ret = 100;
return ret;
}
-static int jz_bat_get_property(struct power_supply *psy,
+static int jz_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
- struct jz_battery_info *bat_info = ps_to_jz_battery(psy)
-
+ struct jz_battery *jz_battery = psy_to_jz_battery(psy);
+ struct power_supply_info *info = &jz_battery->pdata->info;
+ long voltage;
+
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
- val->intval = bat_info->bat_status;
+ val->intval = jz_battery->status;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
- val->intval = bat_info->pdata->batt_tech;
+ val->intval = jz_battery->pdata->info.technology;
break;
case POWER_SUPPLY_PROP_HEALTH:
- if(jz_read_bat(psy) < bat_info->pdata->min_voltag) {
- dev_dbg(psy->dev, "%s: battery is dead,"
- "voltage too low!\n", __func__);
+ voltage = jz_battery_read_voltage(jz_battery);
+ if (voltage < info->voltage_min_design)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
- } else {
- dev_dbg(psy->dev, "%s: battery is good,"
- "voltage normal.\n", __func__);
+ else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
- }
break;
case POWER_SUPPLY_PROP_CAPACITY:
- val->intval = jz_bat_get_capacity(psy);
- dev_dbg(psy->dev, "%s: battery_capacity = %d\n",
- __func__, val->intval);
+ val->intval = jz_battery_get_capacity(psy);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- val->intval = jz_read_bat(psy);
+ val->intval = jz_battery_read_voltage(jz_battery);
if (val->intval < 0)
return val->intval;
break;
- case POWER_SUPPLY_PROP_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
- val->intval = bat_info->pdata->max_voltag;
+ val->intval = info->voltage_max_design;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
- val->intval = bat_info->pdata->min_voltag;
+ val->intval = info->voltage_min_design;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1;
return 0;
}
-static void jz_bat_external_power_changed(struct power_supply *psy)
+static void jz_battery_external_power_changed(struct power_supply *psy)
{
- struct jz_battery_info *bat_info = ps_to_jz_battery(psy);
-
- cancel_delayed_work(&bat_info->bat_work);
- queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ / 8);
+ struct jz_battery *jz_battery = psy_to_jz_battery(psy);
+
+ cancel_delayed_work(&jz_battery->work);
+ schedule_delayed_work(&jz_battery->work, 0);
}
-static char *status_text[] = {
- [POWER_SUPPLY_STATUS_UNKNOWN] = "Unknown",
- [POWER_SUPPLY_STATUS_CHARGING] = "Charging",
- [POWER_SUPPLY_STATUS_DISCHARGING] = "Discharging",
- [POWER_SUPPLY_STATUS_NOT_CHARGING] = "Not charging",
-};
+static irqreturn_t jz_battery_charge_irq(int irq, void *data)
+{
+ struct jz_battery *jz_battery = data;
-static void jz_bat_update(struct power_supply *psy)
+ cancel_delayed_work(&jz_battery->work);
+ schedule_delayed_work(&jz_battery->work, 0);
+
+ return IRQ_HANDLED;
+}
+
+static void jz_battery_update(struct jz_battery *jz_battery)
{
- struct jz_battery_info *bat_info = ps_to_jz_battery(psy);
-
- int old_status = bat_info->bat_status;
- static unsigned long old_batt_vol = 0;
- unsigned long batt_vol = jz_read_bat(psy);
-
- mutex_lock(&bat_info->work_lock);
-
- if (gpio_is_valid(bat_info->pdata->charg_stat_gpio)) {
- if(!gpio_get_value(bat_info->pdata->charg_stat_gpio))
- bat_info->bat_status = POWER_SUPPLY_STATUS_CHARGING;
+ int status;
+ long voltage;
+ long voltage_difference;
+ bool has_changed = 0;
+
+ if (gpio_is_valid(jz_battery->pdata->gpio_charge)) {
+ int is_charging;
+
+ is_charging = gpio_get_value(jz_battery->pdata->gpio_charge);
+ is_charging ^= jz_battery->pdata->gpio_charge_active_low;
+ if (is_charging)
+ status = POWER_SUPPLY_STATUS_CHARGING;
else
- bat_info->bat_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
- dev_dbg(psy->dev, "%s: battery status=%s\n",
- __func__, status_text[bat_info->bat_status]);
-
- if (old_status != bat_info->bat_status) {
- dev_dbg(psy->dev, "%s %s -> %s\n",
- psy->name,
- status_text[old_status],
- status_text[bat_info->bat_status]);
-
- power_supply_changed(psy);
+ status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+
+ if (status != jz_battery->status) {
+ jz_battery->status = status;
+ has_changed = 1;
}
}
- if (old_batt_vol - batt_vol > 50000) {
- dev_dbg(psy->dev, "voltage change : %ld -> %ld\n",
- old_batt_vol, batt_vol);
- power_supply_changed(psy);
- old_batt_vol = batt_vol;
+ voltage = jz_battery_read_voltage(jz_battery);
+ voltage_difference = voltage - jz_battery->voltage;
+ if (voltage_difference > 50000 || voltage_difference < 50000) {
+ jz_battery->voltage = voltage;
+ has_changed = 1;
}
-
- mutex_unlock(&bat_info->work_lock);
+ if (has_changed)
+ power_supply_changed(&jz_battery->battery);
}
-static enum power_supply_property jz_bat_main_props[] = {
+static enum power_supply_property jz_battery_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_HEALTH,
- POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
+ POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_PRESENT,
};
-struct power_supply bat_ps = {
- .name = "battery",
- .type = POWER_SUPPLY_TYPE_BATTERY,
- .properties = jz_bat_main_props,
- .num_properties = ARRAY_SIZE(jz_bat_main_props),
- .get_property = jz_bat_get_property,
- .external_power_changed = jz_bat_external_power_changed,
- .use_for_apm = 1,
-};
-
-static void jz_bat_work(struct work_struct *work)
+static void jz_battery_work(struct work_struct *work)
{
- /* query interval too small will increase system workload*/
+ /* Too small interval will increase system workload */
const int interval = HZ * 30;
- struct jz_battery_info *bat_info = container_of(work,struct jz_battery_info, bat_work.work);
-
- jz_bat_update(&bat_info->bat);
- queue_delayed_work(bat_info->monitor_wqueue,
- &bat_info->bat_work, interval);
-}
-
-#ifdef CONFIG_PM
-static int jz_bat_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct jz_battery_info *bat_info = platform_get_drvdata(pdev);
-
- bat_info->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
-
- return 0;
-}
-
-static int jz_bat_resume(struct platform_device *pdev)
-{
- struct jz_battery_info *bat_info = platform_get_drvdata(pdev);
-
- bat_info->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
-
- cancel_delayed_work(&bat_info->bat_work);
- queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ/10);
+ struct jz_battery *jz_battery = container_of(work, struct jz_battery,
+ work.work);
- return 0;
+ jz_battery_update(jz_battery);
+ schedule_delayed_work(&jz_battery->work, interval);
}
-#else
-#define jz_bat_suspend NULL
-#define jz_bat_resume NULL
-#endif
-static int jz_bat_probe(struct platform_device *pdev)
+static int jz_battery_probe(struct platform_device *pdev)
{
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);
- 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;
+ 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, "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);
- if (bat_info->pdata) {
- if (gpio_is_valid(bat_info->pdata->charg_stat_gpio))
- gpio_free(bat_info->pdata->charg_stat_gpio);
+ cancel_delayed_work_sync(&jz_battery->work);
+
+ 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>");
projects / openwrt / staging / ynezz.git / commitdiff