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Merge git://git.infradead.org/battery-2.6

Browse source 
* git://git.infradead.org/battery-2.6:
  da9030_battery: Fix race between event handler and monitor
  Add MAX17040 Fuel Gauge driver
  w1: ds2760_battery: add support for sleep mode feature
  w1: ds2760: add support for EEPROM read and write
  ds2760_battery: cleanups in ds2760_battery_probe()
This commit is contained in:
Linus Torvalds 2009-06-24 14:35:57 -07:00
commit f27884aead
8 changed files with 420 additions and 17 deletions
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8
drivers/power/Kconfig
View file

@ -82,6 +82,14 @@ config BATTERY_DA9030
Say Y here to enable support for batteries charger integrated into
DA9030 PMIC.
config BATTERY_MAX17040
tristate "Maxim MAX17040 Fuel Gauge"
depends on I2C
help
MAX17040 is fuel-gauge systems for lithium-ion (Li+) batteries
in handheld and portable equipment. The MAX17040 is configured
to operate with a single lithium cell
config CHARGER_PCF50633
tristate "NXP PCF50633 MBC"
depends on MFD_PCF50633

3
drivers/power/Makefile
View file

@ -25,4 +25,5 @@ obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o

19
drivers/power/da9030_battery.c
View file

@ -22,8 +22,6 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#define DA9030_STATUS_CHDET (1 << 3)
#define DA9030_FAULT_LOG 0x0a
#define DA9030_FAULT_LOG_OVER_TEMP (1 << 7)
#define DA9030_FAULT_LOG_VBAT_OVER (1 << 4)
@ -244,6 +242,8 @@ static void da9030_set_charge(struct da9030_charger *charger, int on)
}
da903x_write(charger->master, DA9030_CHARGE_CONTROL, val);
power_supply_changed(&charger->psy);
}
static void da9030_charger_check_state(struct da9030_charger *charger)
@ -258,6 +258,12 @@ static void da9030_charger_check_state(struct da9030_charger *charger)
da9030_set_charge(charger, 1);
}
} else {
/* Charger has been pulled out */
if (!charger->chdet) {
da9030_set_charge(charger, 0);
return;
}
if (charger->adc.vbat_res >=
charger->thresholds.vbat_charge_stop) {
da9030_set_charge(charger, 0);
@ -395,13 +401,11 @@ static int da9030_battery_event(struct notifier_block *nb, unsigned long event,
{
struct da9030_charger *charger =
container_of(nb, struct da9030_charger, nb);
int status;
switch (event) {
case DA9030_EVENT_CHDET:
status = da903x_query_status(charger->master,
DA9030_STATUS_CHDET);
da9030_set_charge(charger, status);
cancel_delayed_work_sync(&charger->work);
schedule_work(&charger->work.work);
break;
case DA9030_EVENT_VBATMON:
da9030_battery_vbat_event(charger);
@ -565,7 +569,8 @@ static int da9030_battery_remove(struct platform_device *dev)
da903x_unregister_notifier(charger->master, &charger->nb,
DA9030_EVENT_CHDET | DA9030_EVENT_VBATMON |
DA9030_EVENT_CHIOVER | DA9030_EVENT_TBAT);
cancel_delayed_work(&charger->work);
cancel_delayed_work_sync(&charger->work);
da9030_set_charge(charger, 0);
power_supply_unregister(&charger->psy);
kfree(charger);

42
drivers/power/ds2760_battery.c
View file

@ -62,6 +62,10 @@ static unsigned int cache_time = 1000;
module_param(cache_time, uint, 0644);
MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
static unsigned int pmod_enabled;
module_param(pmod_enabled, bool, 0644);
MODULE_PARM_DESC(pmod_enabled, "PMOD enable bit");
/* Some batteries have their rated capacity stored a N * 10 mAh, while
* others use an index into this table. */
static int rated_capacities[] = {
@ -259,6 +263,17 @@ static void ds2760_battery_update_status(struct ds2760_device_info *di)
power_supply_changed(&di->bat);
}
static void ds2760_battery_write_status(struct ds2760_device_info *di,
char status)
{
if (status == di->raw[DS2760_STATUS_REG])
return;
w1_ds2760_write(di->w1_dev, &status, DS2760_STATUS_WRITE_REG, 1);
w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
}
static void ds2760_battery_work(struct work_struct *work)
{
struct ds2760_device_info *di = container_of(work,
@ -342,9 +357,9 @@ static enum power_supply_property ds2760_battery_props[] = {
static int ds2760_battery_probe(struct platform_device *pdev)
{
char status;
int retval = 0;
struct ds2760_device_info *di;
struct ds2760_platform_data *pdata;
di = kzalloc(sizeof(*di), GFP_KERNEL);
if (!di) {
@ -354,14 +369,13 @@ static int ds2760_battery_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, di);
pdata = pdev->dev.platform_data;
di->dev = &pdev->dev;
di->w1_dev = pdev->dev.parent;
di->bat.name = dev_name(&pdev->dev);
di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
di->bat.properties = ds2760_battery_props;
di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props);
di->bat.get_property = ds2760_battery_get_property;
di->dev = &pdev->dev;
di->w1_dev = pdev->dev.parent;
di->bat.name = dev_name(&pdev->dev);
di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
di->bat.properties = ds2760_battery_props;
di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props);
di->bat.get_property = ds2760_battery_get_property;
di->bat.external_power_changed =
ds2760_battery_external_power_changed;
@ -373,6 +387,16 @@ static int ds2760_battery_probe(struct platform_device *pdev)
goto batt_failed;
}
/* enable sleep mode feature */
ds2760_battery_read_status(di);
status = di->raw[DS2760_STATUS_REG];
if (pmod_enabled)
status |= DS2760_STATUS_PMOD;
else
status &= ~DS2760_STATUS_PMOD;
ds2760_battery_write_status(di, status);
INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work);
di->monitor_wqueue = create_singlethread_workqueue(dev_name(&pdev->dev));
if (!di->monitor_wqueue) {

309
drivers/power/max17040_battery.c Normal file
View file

@ -0,0 +1,309 @@
/*
* max17040_battery.c
* fuel-gauge systems for lithium-ion (Li+) batteries
*
* Copyright (C) 2009 Samsung Electronics
* Minkyu Kang <mk7.kang@samsung.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/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/power_supply.h>
#include <linux/max17040_battery.h>
#define MAX17040_VCELL_MSB 0x02
#define MAX17040_VCELL_LSB 0x03
#define MAX17040_SOC_MSB 0x04
#define MAX17040_SOC_LSB 0x05
#define MAX17040_MODE_MSB 0x06
#define MAX17040_MODE_LSB 0x07
#define MAX17040_VER_MSB 0x08
#define MAX17040_VER_LSB 0x09
#define MAX17040_RCOMP_MSB 0x0C
#define MAX17040_RCOMP_LSB 0x0D
#define MAX17040_CMD_MSB 0xFE
#define MAX17040_CMD_LSB 0xFF
#define MAX17040_DELAY 1000
#define MAX17040_BATTERY_FULL 95
struct max17040_chip {
struct i2c_client *client;
struct delayed_work work;
struct power_supply battery;
struct max17040_platform_data *pdata;
/* State Of Connect */
int online;
/* battery voltage */
int vcell;
/* battery capacity */
int soc;
/* State Of Charge */
int status;
};
static int max17040_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max17040_chip *chip = container_of(psy,
struct max17040_chip, battery);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = chip->status;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = chip->online;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = chip->vcell;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = chip->soc;
break;
default:
return -EINVAL;
}
return 0;
}
static int max17040_write_reg(struct i2c_client *client, int reg, u8 value)
{
int ret;
ret = i2c_smbus_write_byte_data(client, reg, value);
if (ret < 0)
dev_err(&client->dev, "%s: err %d\n", __func__, ret);
return ret;
}
static int max17040_read_reg(struct i2c_client *client, int reg)
{
int ret;
ret = i2c_smbus_read_byte_data(client, reg);
if (ret < 0)
dev_err(&client->dev, "%s: err %d\n", __func__, ret);
return ret;
}
static void max17040_reset(struct i2c_client *client)
{
max17040_write_reg(client, MAX17040_CMD_MSB, 0x54);
max17040_write_reg(client, MAX17040_CMD_LSB, 0x00);
}
static void max17040_get_vcell(struct i2c_client *client)
{
struct max17040_chip *chip = i2c_get_clientdata(client);
u8 msb;
u8 lsb;
msb = max17040_read_reg(client, MAX17040_VCELL_MSB);
lsb = max17040_read_reg(client, MAX17040_VCELL_LSB);
chip->vcell = (msb << 4) + (lsb >> 4);
}
static void max17040_get_soc(struct i2c_client *client)
{
struct max17040_chip *chip = i2c_get_clientdata(client);
u8 msb;
u8 lsb;
msb = max17040_read_reg(client, MAX17040_SOC_MSB);
lsb = max17040_read_reg(client, MAX17040_SOC_LSB);
chip->soc = msb;
}
static void max17040_get_version(struct i2c_client *client)
{
u8 msb;
u8 lsb;
msb = max17040_read_reg(client, MAX17040_VER_MSB);
lsb = max17040_read_reg(client, MAX17040_VER_LSB);
dev_info(&client->dev, "MAX17040 Fuel-Gauge Ver %d%d\n", msb, lsb);
}
static void max17040_get_online(struct i2c_client *client)
{
struct max17040_chip *chip = i2c_get_clientdata(client);
if (chip->pdata->battery_online)
chip->online = chip->pdata->battery_online();
else
chip->online = 1;
}
static void max17040_get_status(struct i2c_client *client)
{
struct max17040_chip *chip = i2c_get_clientdata(client);
if (!chip->pdata->charger_online || !chip->pdata->charger_enable) {
chip->status = POWER_SUPPLY_STATUS_UNKNOWN;
return;
}
if (chip->pdata->charger_online()) {
if (chip->pdata->charger_enable())
chip->status = POWER_SUPPLY_STATUS_CHARGING;
else
chip->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
} else {
chip->status = POWER_SUPPLY_STATUS_DISCHARGING;
}
if (chip->soc > MAX17040_BATTERY_FULL)
chip->status = POWER_SUPPLY_STATUS_FULL;
}
static void max17040_work(struct work_struct *work)
{
struct max17040_chip *chip;
chip = container_of(work, struct max17040_chip, work.work);
max17040_get_vcell(chip->client);
max17040_get_soc(chip->client);
max17040_get_online(chip->client);
max17040_get_status(chip->client);
schedule_delayed_work(&chip->work, MAX17040_DELAY);
}
static enum power_supply_property max17040_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CAPACITY,
};
static int __devinit max17040_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct max17040_chip *chip;
int ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
return -EIO;
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->client = client;
chip->pdata = client->dev.platform_data;
i2c_set_clientdata(client, chip);
chip->battery.name = "battery";
chip->battery.type = POWER_SUPPLY_TYPE_BATTERY;
chip->battery.get_property = max17040_get_property;
chip->battery.properties = max17040_battery_props;
chip->battery.num_properties = ARRAY_SIZE(max17040_battery_props);
ret = power_supply_register(&client->dev, &chip->battery);
if (ret) {
dev_err(&client->dev, "failed: power supply register\n");
i2c_set_clientdata(client, NULL);
kfree(chip);
return ret;
}
max17040_reset(client);
max17040_get_version(client);
INIT_DELAYED_WORK_DEFERRABLE(&chip->work, max17040_work);
schedule_delayed_work(&chip->work, MAX17040_DELAY);
return 0;
}
static int __devexit max17040_remove(struct i2c_client *client)
{
struct max17040_chip *chip = i2c_get_clientdata(client);
power_supply_unregister(&chip->battery);
cancel_delayed_work(&chip->work);
i2c_set_clientdata(client, NULL);
kfree(chip);
return 0;
}
#ifdef CONFIG_PM
static int max17040_suspend(struct i2c_client *client,
pm_message_t state)
{
struct max17040_chip *chip = i2c_get_clientdata(client);
cancel_delayed_work(&chip->work);
return 0;
}
static int max17040_resume(struct i2c_client *client)
{
struct max17040_chip *chip = i2c_get_clientdata(client);
schedule_delayed_work(&chip->work, MAX17040_DELAY);
return 0;
}
#else
#define max17040_suspend NULL
#define max17040_resume NULL
#endif /* CONFIG_PM */
static const struct i2c_device_id max17040_id[] = {
{ "max17040", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max17040_id);
static struct i2c_driver max17040_i2c_driver = {
.driver = {
.name = "max17040",
},
.probe = max17040_probe,
.remove = __devexit_p(max17040_remove),
.suspend = max17040_suspend,
.resume = max17040_resume,
.id_table = max17040_id,
};
static int __init max17040_init(void)
{
return i2c_add_driver(&max17040_i2c_driver);
}
module_init(max17040_init);
static void __exit max17040_exit(void)
{
i2c_del_driver(&max17040_i2c_driver);
}
module_exit(max17040_exit);
MODULE_AUTHOR("Minkyu Kang <mk7.kang@samsung.com>");
MODULE_DESCRIPTION("MAX17040 Fuel Gauge");
MODULE_LICENSE("GPL");

30
drivers/w1/slaves/w1_ds2760.c
View file

@ -68,6 +68,34 @@ int w1_ds2760_write(struct device *dev, char *buf, int addr, size_t count)
return w1_ds2760_io(dev, buf, addr, count, 1);
}
static int w1_ds2760_eeprom_cmd(struct device *dev, int addr, int cmd)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
if (!dev)
return -EINVAL;
mutex_lock(&sl->master->mutex);
if (w1_reset_select_slave(sl) == 0) {
w1_write_8(sl->master, cmd);
w1_write_8(sl->master, addr);
}
mutex_unlock(&sl->master->mutex);
return 0;
}
int w1_ds2760_store_eeprom(struct device *dev, int addr)
{
return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_COPY_DATA);
}
int w1_ds2760_recall_eeprom(struct device *dev, int addr)
{
return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_RECALL_DATA);
}
static ssize_t w1_ds2760_read_bin(struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
@ -200,6 +228,8 @@ static void __exit w1_ds2760_exit(void)
EXPORT_SYMBOL(w1_ds2760_read);
EXPORT_SYMBOL(w1_ds2760_write);
EXPORT_SYMBOL(w1_ds2760_store_eeprom);
EXPORT_SYMBOL(w1_ds2760_recall_eeprom);
module_init(w1_ds2760_init);
module_exit(w1_ds2760_exit);

7
drivers/w1/slaves/w1_ds2760.h
View file

@ -25,6 +25,10 @@
#define DS2760_PROTECTION_REG 0x00
#define DS2760_STATUS_REG 0x01
#define DS2760_STATUS_IE (1 << 2)
#define DS2760_STATUS_SWEN (1 << 3)
#define DS2760_STATUS_RNAOP (1 << 4)
#define DS2760_STATUS_PMOD (1 << 5)
#define DS2760_EEPROM_REG 0x07
#define DS2760_SPECIAL_FEATURE_REG 0x08
#define DS2760_VOLTAGE_MSB 0x0c
@ -38,6 +42,7 @@
#define DS2760_EEPROM_BLOCK0 0x20
#define DS2760_ACTIVE_FULL 0x20
#define DS2760_EEPROM_BLOCK1 0x30
#define DS2760_STATUS_WRITE_REG 0x31
#define DS2760_RATED_CAPACITY 0x32
#define DS2760_CURRENT_OFFSET_BIAS 0x33
#define DS2760_ACTIVE_EMPTY 0x3b
@ -46,5 +51,7 @@ extern int w1_ds2760_read(struct device *dev, char *buf, int addr,
size_t count);
extern int w1_ds2760_write(struct device *dev, char *buf, int addr,
size_t count);
extern int w1_ds2760_store_eeprom(struct device *dev, int addr);
extern int w1_ds2760_recall_eeprom(struct device *dev, int addr);
#endif /* !__w1_ds2760_h__ */

19
include/linux/max17040_battery.h Normal file
View file

@ -0,0 +1,19 @@
/*
* Copyright (C) 2009 Samsung Electronics
* Minkyu Kang <mk7.kang@samsung.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.
*/
#ifndef __MAX17040_BATTERY_H_
#define __MAX17040_BATTERY_H_
struct max17040_platform_data {
int (*battery_online)(void);
int (*charger_online)(void);
int (*charger_enable)(void);
};
#endif