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Commit 7d67474e authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

* git://git.infradead.org/battery-2.6:
  bq27x00_battery: use unaligned access helper
  power_supply: fix dependency of tosa_battery
  power_supply: Support for Texas Instruments BQ27200 battery managers
  power_supply: Add function to return system-wide power state
  pda_power: Check and handle return value of set_irq_wake
parents 252883e5 ed8c3174

drivers/power/Kconfig

+7 −1
Original line number Diff line number Diff line
@@ -51,7 +51,7 @@ config BATTERY_OLPC 


config BATTERY_TOSA

	tristate "Sharp SL-6000 (tosa) battery"

	depends on MACH_TOSA && MFD_TC6393XB

	depends on MACH_TOSA && MFD_TC6393XB && TOUCHSCREEN_WM97XX

	help

	  Say Y to enable support for the battery on the Sharp Zaurus

	  SL-6000 (tosa) models.
@@ -62,4 +62,10 @@ config BATTERY_WM97XX 
	help

	  Say Y to enable support for battery measured by WM97xx aux port.



config BATTERY_BQ27x00

	tristate "BQ27200 battery driver"

	depends on I2C

	help

	  Say Y here to enable support for batteries with BQ27200(I2C) chip.



endif # POWER_SUPPLY

drivers/power/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -22,3 +22,4 @@ obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o 
obj-$(CONFIG_BATTERY_OLPC)	+= olpc_battery.o

obj-$(CONFIG_BATTERY_TOSA)	+= tosa_battery.o

obj-$(CONFIG_BATTERY_WM97XX)	+= wm97xx_battery.o

obj-$(CONFIG_BATTERY_BQ27x00)	+= bq27x00_battery.o

drivers/power/bq27x00_battery.c

0 → 100644
+381 −0
Original line number Diff line number Diff line 
/*

 * BQ27x00 battery driver

 *

 * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it>

 * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>

 *

 * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.

 *

 * This package 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.

 *

 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 *

 */

#include <linux/module.h>

#include <linux/param.h>

#include <linux/jiffies.h>

#include <linux/workqueue.h>

#include <linux/delay.h>

#include <linux/platform_device.h>

#include <linux/power_supply.h>

#include <linux/idr.h>

#include <linux/i2c.h>

#include <asm/unaligned.h>



#define DRIVER_VERSION			"1.0.0"



#define BQ27x00_REG_TEMP		0x06

#define BQ27x00_REG_VOLT		0x08

#define BQ27x00_REG_RSOC		0x0B /* Relative State-of-Charge */

#define BQ27x00_REG_AI			0x14

#define BQ27x00_REG_FLAGS		0x0A



/* If the system has several batteries we need a different name for each

 * of them...

 */

static DEFINE_IDR(battery_id);

static DEFINE_MUTEX(battery_mutex);



struct bq27x00_device_info;

struct bq27x00_access_methods {

	int (*read)(u8 reg, int *rt_value, int b_single,

		struct bq27x00_device_info *di);

};



struct bq27x00_device_info {

	struct device 		*dev;

	int			id;

	int			voltage_uV;

	int			current_uA;

	int			temp_C;

	int			charge_rsoc;

	struct bq27x00_access_methods	*bus;

	struct power_supply	bat;



	struct i2c_client	*client;

};



static enum power_supply_property bq27x00_battery_props[] = {

	POWER_SUPPLY_PROP_PRESENT,

	POWER_SUPPLY_PROP_VOLTAGE_NOW,

	POWER_SUPPLY_PROP_CURRENT_NOW,

	POWER_SUPPLY_PROP_CAPACITY,

	POWER_SUPPLY_PROP_TEMP,

};



/*

 * Common code for BQ27x00 devices

 */



static int bq27x00_read(u8 reg, int *rt_value, int b_single,

			struct bq27x00_device_info *di)

{

	int ret;



	ret = di->bus->read(reg, rt_value, b_single, di);

	*rt_value = be16_to_cpu(*rt_value);



	return ret;

}



/*

 * Return the battery temperature in Celcius degrees

 * Or < 0 if something fails.

 */

static int bq27x00_battery_temperature(struct bq27x00_device_info *di)

{

	int ret;

	int temp = 0;



	ret = bq27x00_read(BQ27x00_REG_TEMP, &temp, 0, di);

	if (ret) {

		dev_err(di->dev, "error reading temperature\n");

		return ret;

	}



	return (temp >> 2) - 273;

}



/*

 * Return the battery Voltage in milivolts

 * Or < 0 if something fails.

 */

static int bq27x00_battery_voltage(struct bq27x00_device_info *di)

{

	int ret;

	int volt = 0;



	ret = bq27x00_read(BQ27x00_REG_VOLT, &volt, 0, di);

	if (ret) {

		dev_err(di->dev, "error reading voltage\n");

		return ret;

	}



	return volt;

}



/*

 * Return the battery average current

 * Note that current can be negative signed as well

 * Or 0 if something fails.

 */

static int bq27x00_battery_current(struct bq27x00_device_info *di)

{

	int ret;

	int curr = 0;

	int flags = 0;



	ret = bq27x00_read(BQ27x00_REG_AI, &curr, 0, di);

	if (ret) {

		dev_err(di->dev, "error reading current\n");

		return 0;

	}

	ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di);

	if (ret < 0) {

		dev_err(di->dev, "error reading flags\n");

		return 0;

	}

	if ((flags & (1 << 7)) != 0) {

		dev_dbg(di->dev, "negative current!\n");

		return -curr;

	}

	return curr;

}



/*

 * Return the battery Relative State-of-Charge

 * Or < 0 if something fails.

 */

static int bq27x00_battery_rsoc(struct bq27x00_device_info *di)

{

	int ret;

	int rsoc = 0;



	ret = bq27x00_read(BQ27x00_REG_RSOC, &rsoc, 1, di);

	if (ret) {

		dev_err(di->dev, "error reading relative State-of-Charge\n");

		return ret;

	}



	return rsoc >> 8;

}



#define to_bq27x00_device_info(x) container_of((x), \

				struct bq27x00_device_info, bat);



static int bq27x00_battery_get_property(struct power_supply *psy,

					enum power_supply_property psp,

					union power_supply_propval *val)

{

	struct bq27x00_device_info *di = to_bq27x00_device_info(psy);



	switch (psp) {

	case POWER_SUPPLY_PROP_VOLTAGE_NOW:

	case POWER_SUPPLY_PROP_PRESENT:

		val->intval = bq27x00_battery_voltage(di);

		if (psp == POWER_SUPPLY_PROP_PRESENT)

			val->intval = val->intval <= 0 ? 0 : 1;

		break;

	case POWER_SUPPLY_PROP_CURRENT_NOW:

		val->intval = bq27x00_battery_current(di);

		break;

	case POWER_SUPPLY_PROP_CAPACITY:

		val->intval = bq27x00_battery_rsoc(di);

		break;

	case POWER_SUPPLY_PROP_TEMP:

		val->intval = bq27x00_battery_temperature(di);

		break;

	default:

		return -EINVAL;

	}



	return 0;

}



static void bq27x00_powersupply_init(struct bq27x00_device_info *di)

{

	di->bat.type = POWER_SUPPLY_TYPE_BATTERY;

	di->bat.properties = bq27x00_battery_props;

	di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);

	di->bat.get_property = bq27x00_battery_get_property;

	di->bat.external_power_changed = NULL;

}



/*

 * BQ27200 specific code

 */



static int bq27200_read(u8 reg, int *rt_value, int b_single,

			struct bq27x00_device_info *di)

{

	struct i2c_client *client = di->client;

	struct i2c_msg msg[1];

	unsigned char data[2];

	int err;



	if (!client->adapter)

		return -ENODEV;



	msg->addr = client->addr;

	msg->flags = 0;

	msg->len = 1;

	msg->buf = data;



	data[0] = reg;

	err = i2c_transfer(client->adapter, msg, 1);



	if (err >= 0) {

		if (!b_single)

			msg->len = 2;

		else

			msg->len = 1;



		msg->flags = I2C_M_RD;

		err = i2c_transfer(client->adapter, msg, 1);

		if (err >= 0) {

			if (!b_single)

				*rt_value = get_unaligned_be16(data);

			else

				*rt_value = data[0];



			return 0;

		}

	}

	return err;

}



static int bq27200_battery_probe(struct i2c_client *client,

				 const struct i2c_device_id *id)

{

	char *name;

	struct bq27x00_device_info *di;

	struct bq27x00_access_methods *bus;

	int num;

	int retval = 0;



	/* Get new ID for the new battery device */

	retval = idr_pre_get(&battery_id, GFP_KERNEL);

	if (retval == 0)

		return -ENOMEM;

	mutex_lock(&battery_mutex);

	retval = idr_get_new(&battery_id, client, &num);

	mutex_unlock(&battery_mutex);

	if (retval < 0)

		return retval;



	name = kasprintf(GFP_KERNEL, "bq27200-%d", num);

	if (!name) {

		dev_err(&client->dev, "failed to allocate device name\n");

		retval = -ENOMEM;

		goto batt_failed_1;

	}



	di = kzalloc(sizeof(*di), GFP_KERNEL);

	if (!di) {

		dev_err(&client->dev, "failed to allocate device info data\n");

		retval = -ENOMEM;

		goto batt_failed_2;

	}

	di->id = num;



	bus = kzalloc(sizeof(*bus), GFP_KERNEL);

	if (!bus) {

		dev_err(&client->dev, "failed to allocate access method "

					"data\n");

		retval = -ENOMEM;

		goto batt_failed_3;

	}



	i2c_set_clientdata(client, di);

	di->dev = &client->dev;

	di->bat.name = name;

	bus->read = &bq27200_read;

	di->bus = bus;

	di->client = client;



	bq27x00_powersupply_init(di);



	retval = power_supply_register(&client->dev, &di->bat);

	if (retval) {

		dev_err(&client->dev, "failed to register battery\n");

		goto batt_failed_4;

	}



	dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION);



	return 0;



batt_failed_4:

	kfree(bus);

batt_failed_3:

	kfree(di);

batt_failed_2:

	kfree(name);

batt_failed_1:

	mutex_lock(&battery_mutex);

	idr_remove(&battery_id, num);

	mutex_unlock(&battery_mutex);



	return retval;

}



static int bq27200_battery_remove(struct i2c_client *client)

{

	struct bq27x00_device_info *di = i2c_get_clientdata(client);



	power_supply_unregister(&di->bat);



	kfree(di->bat.name);



	mutex_lock(&battery_mutex);

	idr_remove(&battery_id, di->id);

	mutex_unlock(&battery_mutex);



	kfree(di);



	return 0;

}



/*

 * Module stuff

 */



static const struct i2c_device_id bq27200_id[] = {

	{ "bq27200", 0 },

	{},

};



static struct i2c_driver bq27200_battery_driver = {

	.driver = {

		.name = "bq27200-battery",

	},

	.probe = bq27200_battery_probe,

	.remove = bq27200_battery_remove,

	.id_table = bq27200_id,

};



static int __init bq27x00_battery_init(void)

{

	int ret;



	ret = i2c_add_driver(&bq27200_battery_driver);

	if (ret)

		printk(KERN_ERR "Unable to register BQ27200 driver\n");



	return ret;

}

module_init(bq27x00_battery_init);



static void __exit bq27x00_battery_exit(void)

{

	i2c_del_driver(&bq27200_battery_driver);

}

module_exit(bq27x00_battery_exit);



MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");

MODULE_DESCRIPTION("BQ27x00 battery monitor driver");

MODULE_LICENSE("GPL");

drivers/power/pda_power.c

+7 −4
Original line number Diff line number Diff line
@@ -334,13 +334,16 @@ static int pda_power_remove(struct platform_device *pdev) 
}



#ifdef CONFIG_PM

static int ac_wakeup_enabled;

static int usb_wakeup_enabled;



static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)

{

	if (device_may_wakeup(&pdev->dev)) {

		if (ac_irq)

			enable_irq_wake(ac_irq->start);

			ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);

		if (usb_irq)

			enable_irq_wake(usb_irq->start);

			usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);

	}



	return 0;
@@ -349,9 +352,9 @@ static int pda_power_suspend(struct platform_device *pdev, pm_message_t state) 
static int pda_power_resume(struct platform_device *pdev)

{

	if (device_may_wakeup(&pdev->dev)) {

		if (usb_irq)

		if (usb_irq && usb_wakeup_enabled)

			disable_irq_wake(usb_irq->start);

		if (ac_irq)

		if (ac_irq && ac_wakeup_enabled)

			disable_irq_wake(ac_irq->start);

	}

drivers/power/power_supply_core.c

+25 −0
Original line number Diff line number Diff line
@@ -87,6 +87,30 @@ int power_supply_am_i_supplied(struct power_supply *psy) 
	return error;

}



static int __power_supply_is_system_supplied(struct device *dev, void *data)

{

	union power_supply_propval ret = {0,};

	struct power_supply *psy = dev_get_drvdata(dev);



	if (psy->type != POWER_SUPPLY_TYPE_BATTERY) {

		if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret))

			return 0;

		if (ret.intval)

			return ret.intval;

	}

	return 0;

}



int power_supply_is_system_supplied(void)

{

	int error;



	error = class_for_each_device(power_supply_class, NULL, NULL,

				      __power_supply_is_system_supplied);



	return error;

}



int power_supply_register(struct device *parent, struct power_supply *psy)

{

	int rc = 0;
@@ -148,6 +172,7 @@ static void __exit power_supply_class_exit(void) 


EXPORT_SYMBOL_GPL(power_supply_changed);

EXPORT_SYMBOL_GPL(power_supply_am_i_supplied);

EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);

EXPORT_SYMBOL_GPL(power_supply_register);

EXPORT_SYMBOL_GPL(power_supply_unregister);