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authorLinus Torvalds <torvalds@linux-foundation.org>2009-06-24 14:35:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-24 14:35:57 -0700
commitf27884aeadff9654f4a1e8a05dd92f4b140afe29 (patch)
tree22db0c732fcc4e68be25190454631ee1d249e295
parentc6223048259006759237d826219f0fa4f312fb47 (diff)
parenta35d01a5d2ac533edab94a8e3b6749ab213c91c5 (diff)
Merge git://git.infradead.org/battery-2.6
* 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()
-rw-r--r--drivers/power/Kconfig8
-rw-r--r--drivers/power/Makefile3
-rw-r--r--drivers/power/da9030_battery.c19
-rw-r--r--drivers/power/ds2760_battery.c42
-rw-r--r--drivers/power/max17040_battery.c309
-rw-r--r--drivers/w1/slaves/w1_ds2760.c30
-rw-r--r--drivers/w1/slaves/w1_ds2760.h7
-rw-r--r--include/linux/max17040_battery.h19
8 files changed, 420 insertions, 17 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 33da1127992a..7eda34838bfe 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -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
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 2fcf41d13e5c..daf3179689aa 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -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-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o \ No newline at end of file
+obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
+obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
diff --git a/drivers/power/da9030_battery.c b/drivers/power/da9030_battery.c
index 1662bb0f23a5..3364198134a1 100644
--- a/drivers/power/da9030_battery.c
+++ b/drivers/power/da9030_battery.c
@@ -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);
diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c
index a52d4a11652d..520b5c49ff30 100644
--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -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) {
diff --git a/drivers/power/max17040_battery.c b/drivers/power/max17040_battery.c
new file mode 100644
index 000000000000..87b98bf27ae1
--- /dev/null
+++ b/drivers/power/max17040_battery.c
@@ -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");
diff --git a/drivers/w1/slaves/w1_ds2760.c b/drivers/w1/slaves/w1_ds2760.c
index 1f09d4e4144c..59f708efe25f 100644
--- a/drivers/w1/slaves/w1_ds2760.c
+++ b/drivers/w1/slaves/w1_ds2760.c
@@ -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);
diff --git a/drivers/w1/slaves/w1_ds2760.h b/drivers/w1/slaves/w1_ds2760.h
index f1302429cb02..58e774141568 100644
--- a/drivers/w1/slaves/w1_ds2760.h
+++ b/drivers/w1/slaves/w1_ds2760.h
@@ -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__ */
diff --git a/include/linux/max17040_battery.h b/include/linux/max17040_battery.h
new file mode 100644
index 000000000000..ad97b06cf930
--- /dev/null
+++ b/include/linux/max17040_battery.h
@@ -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