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

Browse Source 
* git://git.infradead.org/battery-2.6:
  power_supply: Makefile cleanup
  bq27x00_battery: Add missing kfree(di->bus) in bq27x00_battery_remove()
  power_supply: Introduce maximum current property
  power_supply: Add types for USB chargers
  ds2782_battery: Fix units
  power_supply: Add driver for TWL4030/TPS65950 BCI charger
  bq20z75: Add support for more power supply properties
  wm831x_power: Add missing kfree(wm831x_power) in wm831x_power_remove()
  jz4740-battery: Add missing kfree(jz_battery) in jz_battery_remove()
  ds2760_battery: Add missing kfree(di) in ds2760_battery_remove()
  olpc_battery: Fix endian neutral breakage for s16 values
  ds2760_battery: Fix W1 and W1_SLAVE_DS2760 dependency
  pcf50633-charger: Add missing sysfs_remove_group()
  power_supply: Add driver for TI BQ20Z75 gas gauge IC
  wm831x_power: Remove duplicate chg mask
  omap: rx51: Add support for USB chargers
  power_supply: Add isp1704 charger detection driver
This commit is contained in:
Linus Torvalds 2010-10-26 10:14:23 -07:00
commit 45352bbf48
15 changed files with 1483 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/mach-omap2/board-rx51-peripherals.c
View File

@ -107,6 +107,10 @@ static struct spi_board_info rx51_peripherals_spi_board_info[] __initdata = {
},
};
static struct platform_device rx51_charger_device = {
.name = "isp1704_charger",
};
#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
#define RX51_GPIO_CAMERA_LENS_COVER 110
@ -919,5 +923,6 @@ void __init rx51_peripherals_init(void)
spi_register_board_info(rx51_peripherals_spi_board_info,
ARRAY_SIZE(rx51_peripherals_spi_board_info));
omap2_hsmmc_init(mmc);
platform_device_register(&rx51_charger_device);
}

23
drivers/power/Kconfig
View File

@ -64,8 +64,7 @@ config TEST_POWER
config BATTERY_DS2760
tristate "DS2760 battery driver (HP iPAQ & others)"
select W1
select W1_SLAVE_DS2760
depends on W1 && W1_SLAVE_DS2760
help
Say Y here to enable support for batteries with ds2760 chip.
@ -109,6 +108,13 @@ config BATTERY_WM97XX
help
Say Y to enable support for battery measured by WM97xx aux port.
config BATTERY_BQ20Z75
tristate "TI BQ20z75 gas gauge"
depends on I2C
help
Say Y to include support for TI BQ20z75 SBS-compliant
gas gauge and protection IC.
config BATTERY_BQ27x00
tristate "BQ27x00 battery driver"
depends on I2C
@ -166,4 +172,17 @@ config BATTERY_INTEL_MID
Say Y here to enable the battery driver on Intel MID
platforms.
config CHARGER_ISP1704
tristate "ISP1704 USB Charger Detection"
depends on USB_OTG_UTILS
help
Say Y to enable support for USB Charger Detection with
ISP1707/ISP1704 USB transceivers.
config CHARGER_TWL4030
tristate "OMAP TWL4030 BCI charger driver"
depends on TWL4030_CORE
help
Say Y here to enable support for TWL4030 Battery Charge Interface.
endif # POWER_SUPPLY

19
drivers/power/Makefile
View File

@ -1,16 +1,8 @@
power_supply-objs := power_supply_core.o
ccflags-$(CONFIG_POWER_SUPPLY_DEBUG) := -DDEBUG
ifeq ($(CONFIG_SYSFS),y)
power_supply-objs += power_supply_sysfs.o
endif
ifeq ($(CONFIG_LEDS_TRIGGERS),y)
power_supply-objs += power_supply_leds.o
endif
ifeq ($(CONFIG_POWER_SUPPLY_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif
power_supply-y := power_supply_core.o
power_supply-$(CONFIG_SYSFS) += power_supply_sysfs.o
power_supply-$(CONFIG_LEDS_TRIGGERS) += power_supply_leds.o
obj-$(CONFIG_POWER_SUPPLY) += power_supply.o
@ -29,6 +21,7 @@ obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
obj-$(CONFIG_BATTERY_COLLIE) += collie_battery.o
obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
obj-$(CONFIG_BATTERY_BQ20Z75) += bq20z75.o
obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
@ -37,3 +30,5 @@ obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
obj-$(CONFIG_BATTERY_JZ4740) += jz4740-battery.o
obj-$(CONFIG_BATTERY_INTEL_MID) += intel_mid_battery.o
obj-$(CONFIG_CHARGER_ISP1704) += isp1704_charger.o
obj-$(CONFIG_CHARGER_TWL4030) += twl4030_charger.o

493
drivers/power/bq20z75.c Normal file
View File

@ -0,0 +1,493 @@
/*
* Gas Gauge driver for TI's BQ20Z75
*
* Copyright (c) 2010, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/power_supply.h>
#include <linux/i2c.h>
#include <linux/slab.h>
enum {
REG_MANUFACTURER_DATA,
REG_TEMPERATURE,
REG_VOLTAGE,
REG_CURRENT,
REG_CAPACITY,
REG_TIME_TO_EMPTY,
REG_TIME_TO_FULL,
REG_STATUS,
REG_CYCLE_COUNT,
REG_SERIAL_NUMBER,
REG_REMAINING_CAPACITY,
REG_FULL_CHARGE_CAPACITY,
REG_DESIGN_CAPACITY,
REG_DESIGN_VOLTAGE,
};
/* manufacturer access defines */
#define MANUFACTURER_ACCESS_STATUS 0x0006
#define MANUFACTURER_ACCESS_SLEEP 0x0011
/* battery status value bits */
#define BATTERY_DISCHARGING 0x40
#define BATTERY_FULL_CHARGED 0x20
#define BATTERY_FULL_DISCHARGED 0x10
#define BQ20Z75_DATA(_psp, _addr, _min_value, _max_value) { \
.psp = _psp, \
.addr = _addr, \
.min_value = _min_value, \
.max_value = _max_value, \
}
static const struct bq20z75_device_data {
enum power_supply_property psp;
u8 addr;
int min_value;
int max_value;
} bq20z75_data[] = {
[REG_MANUFACTURER_DATA] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_PRESENT, 0x00, 0, 65535),
[REG_TEMPERATURE] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_TEMP, 0x08, 0, 65535),
[REG_VOLTAGE] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_VOLTAGE_NOW, 0x09, 0, 20000),
[REG_CURRENT] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_CURRENT_NOW, 0x0A, -32768,
32767),
[REG_CAPACITY] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_CAPACITY, 0x0E, 0, 100),
[REG_REMAINING_CAPACITY] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_NOW, 0x0F, 0, 65535),
[REG_FULL_CHARGE_CAPACITY] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_FULL, 0x10, 0, 65535),
[REG_TIME_TO_EMPTY] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 0x12, 0,
65535),
[REG_TIME_TO_FULL] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0,
65535),
[REG_STATUS] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535),
[REG_CYCLE_COUNT] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535),
[REG_DESIGN_CAPACITY] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 0x18, 0,
65535),
[REG_DESIGN_VOLTAGE] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0,
65535),
[REG_SERIAL_NUMBER] =
BQ20Z75_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535),
};
static enum power_supply_property bq20z75_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
};
struct bq20z75_info {
struct i2c_client *client;
struct power_supply power_supply;
};
static int bq20z75_read_word_data(struct i2c_client *client, u8 address)
{
s32 ret;
ret = i2c_smbus_read_word_data(client, address);
if (ret < 0) {
dev_err(&client->dev,
"%s: i2c read at address 0x%x failed\n",
__func__, address);
return ret;
}
return le16_to_cpu(ret);
}
static int bq20z75_write_word_data(struct i2c_client *client, u8 address,
u16 value)
{
s32 ret;
ret = i2c_smbus_write_word_data(client, address, le16_to_cpu(value));
if (ret < 0) {
dev_err(&client->dev,
"%s: i2c write to address 0x%x failed\n",
__func__, address);
return ret;
}
return 0;
}
static int bq20z75_get_battery_presence_and_health(
struct i2c_client *client, enum power_supply_property psp,
union power_supply_propval *val)
{
s32 ret;
/* Write to ManufacturerAccess with
* ManufacturerAccess command and then
* read the status */
ret = bq20z75_write_word_data(client,
bq20z75_data[REG_MANUFACTURER_DATA].addr,
MANUFACTURER_ACCESS_STATUS);
if (ret < 0)
return ret;
ret = bq20z75_read_word_data(client,
bq20z75_data[REG_MANUFACTURER_DATA].addr);
if (ret < 0)
return ret;
if (ret < bq20z75_data[REG_MANUFACTURER_DATA].min_value ||
ret > bq20z75_data[REG_MANUFACTURER_DATA].max_value) {
val->intval = 0;
return 0;
}
/* Mask the upper nibble of 2nd byte and
* lower byte of response then
* shift the result by 8 to get status*/
ret &= 0x0F00;
ret >>= 8;
if (psp == POWER_SUPPLY_PROP_PRESENT) {
if (ret == 0x0F)
/* battery removed */
val->intval = 0;
else
val->intval = 1;
} else if (psp == POWER_SUPPLY_PROP_HEALTH) {
if (ret == 0x09)
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
else if (ret == 0x0B)
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (ret == 0x0C)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
}
return 0;
}
static int bq20z75_get_battery_property(struct i2c_client *client,
int reg_offset, enum power_supply_property psp,
union power_supply_propval *val)
{
s32 ret;
ret = bq20z75_read_word_data(client,
bq20z75_data[reg_offset].addr);
if (ret < 0)
return ret;
/* returned values are 16 bit */
if (bq20z75_data[reg_offset].min_value < 0)
ret = (s16)ret;
if (ret >= bq20z75_data[reg_offset].min_value &&
ret <= bq20z75_data[reg_offset].max_value) {
val->intval = ret;
if (psp == POWER_SUPPLY_PROP_STATUS) {
if (ret & BATTERY_FULL_CHARGED)
val->intval = POWER_SUPPLY_STATUS_FULL;
else if (ret & BATTERY_FULL_DISCHARGED)
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
else if (ret & BATTERY_DISCHARGING)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else
val->intval = POWER_SUPPLY_STATUS_CHARGING;
}
} else {
if (psp == POWER_SUPPLY_PROP_STATUS)
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
else
val->intval = 0;
}
return 0;
}
static void bq20z75_unit_adjustment(struct i2c_client *client,
enum power_supply_property psp, union power_supply_propval *val)
{
#define BASE_UNIT_CONVERSION 1000
#define BATTERY_MODE_CAP_MULT_WATT (10 * BASE_UNIT_CONVERSION)
#define TIME_UNIT_CONVERSION 600
#define TEMP_KELVIN_TO_CELCIUS 2731
switch (psp) {
case POWER_SUPPLY_PROP_ENERGY_NOW:
case POWER_SUPPLY_PROP_ENERGY_FULL:
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
val->intval *= BATTERY_MODE_CAP_MULT_WATT;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval *= BASE_UNIT_CONVERSION;
break;
case POWER_SUPPLY_PROP_TEMP:
/* bq20z75 provides battery tempreture in 0.1°K
* so convert it to 0.1°C */
val->intval -= TEMP_KELVIN_TO_CELCIUS;
val->intval *= 10;
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
val->intval *= TIME_UNIT_CONVERSION;
break;
default:
dev_dbg(&client->dev,
"%s: no need for unit conversion %d\n", __func__, psp);
}
}
static int bq20z75_get_battery_capacity(struct i2c_client *client,
int reg_offset, enum power_supply_property psp,
union power_supply_propval *val)
{
s32 ret;
ret = bq20z75_read_word_data(client, bq20z75_data[reg_offset].addr);
if (ret < 0)
return ret;
if (psp == POWER_SUPPLY_PROP_CAPACITY) {
/* bq20z75 spec says that this can be >100 %
* even if max value is 100 % */
val->intval = min(ret, 100);
} else
val->intval = ret;
return 0;
}
static char bq20z75_serial[5];
static int bq20z75_get_battery_serial_number(struct i2c_client *client,
union power_supply_propval *val)
{
int ret;
ret = bq20z75_read_word_data(client,
bq20z75_data[REG_SERIAL_NUMBER].addr);
if (ret < 0)
return ret;
ret = sprintf(bq20z75_serial, "%04x", ret);
val->strval = bq20z75_serial;
return 0;
}
static int bq20z75_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int count;
int ret;
struct bq20z75_info *bq20z75_device = container_of(psy,
struct bq20z75_info, power_supply);
struct i2c_client *client = bq20z75_device->client;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
case POWER_SUPPLY_PROP_HEALTH:
ret = bq20z75_get_battery_presence_and_health(client, psp, val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_ENERGY_NOW:
case POWER_SUPPLY_PROP_ENERGY_FULL:
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
case POWER_SUPPLY_PROP_CAPACITY:
for (count = 0; count < ARRAY_SIZE(bq20z75_data); count++) {
if (psp == bq20z75_data[count].psp)
break;
}
ret = bq20z75_get_battery_capacity(client, count, psp, val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
ret = bq20z75_get_battery_serial_number(client, val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_CYCLE_COUNT:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_TEMP:
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
for (count = 0; count < ARRAY_SIZE(bq20z75_data); count++) {
if (psp == bq20z75_data[count].psp)
break;
}
ret = bq20z75_get_battery_property(client, count, psp, val);
if (ret)
return ret;
break;
default:
dev_err(&client->dev,
"%s: INVALID property\n", __func__);
return -EINVAL;
}
/* Convert units to match requirements for power supply class */
bq20z75_unit_adjustment(client, psp, val);
dev_dbg(&client->dev,
"%s: property = %d, value = %d\n", __func__, psp, val->intval);
return 0;
}
static int bq20z75_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct bq20z75_info *bq20z75_device;
int rc;
bq20z75_device = kzalloc(sizeof(struct bq20z75_info), GFP_KERNEL);
if (!bq20z75_device)
return -ENOMEM;
bq20z75_device->client = client;
bq20z75_device->power_supply.name = "battery";
bq20z75_device->power_supply.type = POWER_SUPPLY_TYPE_BATTERY;
bq20z75_device->power_supply.properties = bq20z75_properties;
bq20z75_device->power_supply.num_properties =
ARRAY_SIZE(bq20z75_properties);
bq20z75_device->power_supply.get_property = bq20z75_get_property;
i2c_set_clientdata(client, bq20z75_device);
rc = power_supply_register(&client->dev, &bq20z75_device->power_supply);
if (rc) {
dev_err(&client->dev,
"%s: Failed to register power supply\n", __func__);
kfree(bq20z75_device);
return rc;
}
dev_info(&client->dev,
"%s: battery gas gauge device registered\n", client->name);
return 0;
}
static int bq20z75_remove(struct i2c_client *client)
{
struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
power_supply_unregister(&bq20z75_device->power_supply);
kfree(bq20z75_device);
bq20z75_device = NULL;
return 0;
}
#if defined CONFIG_PM
static int bq20z75_suspend(struct i2c_client *client,
pm_message_t state)
{
s32 ret;
/* write to manufacturer access with sleep command */
ret = bq20z75_write_word_data(client,
bq20z75_data[REG_MANUFACTURER_DATA].addr,
MANUFACTURER_ACCESS_SLEEP);
if (ret < 0)
return ret;
return 0;
}
#else
#define bq20z75_suspend NULL
#endif
/* any smbus transaction will wake up bq20z75 */
#define bq20z75_resume NULL
static const struct i2c_device_id bq20z75_id[] = {
{ "bq20z75", 0 },
{}
};
static struct i2c_driver bq20z75_battery_driver = {
.probe = bq20z75_probe,
.remove = bq20z75_remove,
.suspend = bq20z75_suspend,
.resume = bq20z75_resume,
.id_table = bq20z75_id,
.driver = {
.name = "bq20z75-battery",
},
};
static int __init bq20z75_battery_init(void)
{
return i2c_add_driver(&bq20z75_battery_driver);
}
module_init(bq20z75_battery_init);
static void __exit bq20z75_battery_exit(void)
{
i2c_del_driver(&bq20z75_battery_driver);
}
module_exit(bq20z75_battery_exit);
MODULE_DESCRIPTION("BQ20z75 battery monitor driver");
MODULE_LICENSE("GPL");

1
drivers/power/bq27x00_battery.c
View File

@ -418,6 +418,7 @@ static int bq27x00_battery_remove(struct i2c_client *client)
power_supply_unregister(&di->bat);
kfree(di->bus);
kfree(di->bat.name);
mutex_lock(&battery_mutex);

1
drivers/power/ds2760_battery.c
View File

@ -586,6 +586,7 @@ static int ds2760_battery_remove(struct platform_device *pdev)
&di->set_charged_work);
destroy_workqueue(di->monitor_wqueue);
power_supply_unregister(&di->bat);
kfree(di);
return 0;
}

12
drivers/power/ds2782_battery.c
View File

@ -44,8 +44,8 @@ struct ds278x_info;
struct ds278x_battery_ops {
int (*get_battery_current)(struct ds278x_info *info, int *current_uA);
int (*get_battery_voltage)(struct ds278x_info *info, int *voltage_uA);
int (*get_battery_capacity)(struct ds278x_info *info, int *capacity_uA);
int (*get_battery_voltage)(struct ds278x_info *info, int *voltage_uV);
int (*get_battery_capacity)(struct ds278x_info *info, int *capacity);
};
#define to_ds278x_info(x) container_of(x, struct ds278x_info, battery)
@ -137,7 +137,7 @@ static int ds2782_get_current(struct ds278x_info *info, int *current_uA)
return 0;
}
static int ds2782_get_voltage(struct ds278x_info *info, int *voltage_uA)
static int ds2782_get_voltage(struct ds278x_info *info, int *voltage_uV)
{
s16 raw;
int err;
@ -149,7 +149,7 @@ static int ds2782_get_voltage(struct ds278x_info *info, int *voltage_uA)
err = ds278x_read_reg16(info, DS278x_REG_VOLT_MSB, &raw);
if (err)
return err;
*voltage_uA = (raw / 32) * 4800;
*voltage_uV = (raw / 32) * 4800;
return 0;
}
@ -177,7 +177,7 @@ static int ds2786_get_current(struct ds278x_info *info, int *current_uA)
return 0;
}
static int ds2786_get_voltage(struct ds278x_info *info, int *voltage_uA)
static int ds2786_get_voltage(struct ds278x_info *info, int *voltage_uV)
{
s16 raw;
int err;
@ -189,7 +189,7 @@ static int ds2786_get_voltage(struct ds278x_info *info, int *voltage_uA)
err = ds278x_read_reg16(info, DS278x_REG_VOLT_MSB, &raw);
if (err)
return err;
*voltage_uA = (raw / 8) * 1220;
*voltage_uV = (raw / 8) * 1220;
return 0;
}

369
drivers/power/isp1704_charger.c Normal file
View File

@ -0,0 +1,369 @@
/*
* ISP1704 USB Charger Detection driver
*
* Copyright (C) 2010 Nokia Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/delay.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
/* Vendor specific Power Control register */
#define ISP1704_PWR_CTRL 0x3d
#define ISP1704_PWR_CTRL_SWCTRL (1 << 0)
#define ISP1704_PWR_CTRL_DET_COMP (1 << 1)
#define ISP1704_PWR_CTRL_BVALID_RISE (1 << 2)
#define ISP1704_PWR_CTRL_BVALID_FALL (1 << 3)
#define ISP1704_PWR_CTRL_DP_WKPU_EN (1 << 4)
#define ISP1704_PWR_CTRL_VDAT_DET (1 << 5)
#define ISP1704_PWR_CTRL_DPVSRC_EN (1 << 6)
#define ISP1704_PWR_CTRL_HWDETECT (1 << 7)
#define NXP_VENDOR_ID 0x04cc
static u16 isp170x_id[] = {
0x1704,
0x1707,
};
struct isp1704_charger {
struct device *dev;
struct power_supply psy;
struct otg_transceiver *otg;
struct notifier_block nb;
struct work_struct work;
char model[7];
unsigned present:1;
};
/*
* ISP1704 detects PS/2 adapters as charger. To make sure the detected charger
* is actually a dedicated charger, the following steps need to be taken.
*/
static inline int isp1704_charger_verify(struct isp1704_charger *isp)
{
int ret = 0;
u8 r;
/* Reset the transceiver */
r = otg_io_read(isp->otg, ULPI_FUNC_CTRL);
r |= ULPI_FUNC_CTRL_RESET;
otg_io_write(isp->otg, ULPI_FUNC_CTRL, r);
usleep_range(1000, 2000);
/* Set normal mode */
r &= ~(ULPI_FUNC_CTRL_RESET | ULPI_FUNC_CTRL_OPMODE_MASK);
otg_io_write(isp->otg, ULPI_FUNC_CTRL, r);
/* Clear the DP and DM pull-down bits */
r = ULPI_OTG_CTRL_DP_PULLDOWN | ULPI_OTG_CTRL_DM_PULLDOWN;
otg_io_write(isp->otg, ULPI_CLR(ULPI_OTG_CTRL), r);
/* Enable strong pull-up on DP (1.5K) and reset */
r = ULPI_FUNC_CTRL_TERMSELECT | ULPI_FUNC_CTRL_RESET;
otg_io_write(isp->otg, ULPI_SET(ULPI_FUNC_CTRL), r);
usleep_range(1000, 2000);
/* Read the line state */
if (!otg_io_read(isp->otg, ULPI_DEBUG)) {
/* Disable strong pull-up on DP (1.5K) */
otg_io_write(isp->otg, ULPI_CLR(ULPI_FUNC_CTRL),
ULPI_FUNC_CTRL_TERMSELECT);
return 1;
}
/* Is it a charger or PS/2 connection */
/* Enable weak pull-up resistor on DP */
otg_io_write(isp->otg, ULPI_SET(ISP1704_PWR_CTRL),
ISP1704_PWR_CTRL_DP_WKPU_EN);
/* Disable strong pull-up on DP (1.5K) */
otg_io_write(isp->otg, ULPI_CLR(ULPI_FUNC_CTRL),
ULPI_FUNC_CTRL_TERMSELECT);
/* Enable weak pull-down resistor on DM */
otg_io_write(isp->otg, ULPI_SET(ULPI_OTG_CTRL),
ULPI_OTG_CTRL_DM_PULLDOWN);
/* It's a charger if the line states are clear */
if (!(otg_io_read(isp->otg, ULPI_DEBUG)))
ret = 1;
/* Disable weak pull-up resistor on DP */
otg_io_write(isp->otg, ULPI_CLR(ISP1704_PWR_CTRL),
ISP1704_PWR_CTRL_DP_WKPU_EN);
return ret;
}
static inline int isp1704_charger_detect(struct isp1704_charger *isp)
{
unsigned long timeout;
u8 r;
int ret = 0;
/* set SW control bit in PWR_CTRL register */
otg_io_write(isp->otg, ISP1704_PWR_CTRL,
ISP1704_PWR_CTRL_SWCTRL);
/* enable manual charger detection */
r = (ISP1704_PWR_CTRL_SWCTRL | ISP1704_PWR_CTRL_DPVSRC_EN);
otg_io_write(isp->otg, ULPI_SET(ISP1704_PWR_CTRL), r);
usleep_range(1000, 2000);
timeout = jiffies + msecs_to_jiffies(300);
do {
/* Check if there is a charger */
if (otg_io_read(isp->otg, ISP1704_PWR_CTRL)
& ISP1704_PWR_CTRL_VDAT_DET) {
ret = isp1704_charger_verify(isp);
break;
}
} while (!time_after(jiffies, timeout));
return ret;
}
static void isp1704_charger_work(struct work_struct *data)
{
int detect;
struct isp1704_charger *isp =
container_of(data, struct isp1704_charger, work);
/*
* FIXME Only supporting dedicated chargers even though isp1704 can
* detect HUB and HOST chargers. If the device has already been
* enumerated, the detection will break the connection.
*/
if (isp->otg->state != OTG_STATE_B_IDLE)
return;
/* disable data pullups */
if (isp->otg->gadget)
usb_gadget_disconnect(isp->otg->gadget);
/* detect charger */
detect = isp1704_charger_detect(isp);
if (detect) {
isp->present = detect;
power_supply_changed(&isp->psy);
}
/* enable data pullups */
if (isp->otg->gadget)
usb_gadget_connect(isp->otg->gadget);
}
static int isp1704_notifier_call(struct notifier_block *nb,
unsigned long event, void *unused)
{
struct isp1704_charger *isp =
container_of(nb, struct isp1704_charger, nb);
switch (event) {
case USB_EVENT_VBUS:
schedule_work(&isp->work);
break;
case USB_EVENT_NONE:
if (isp->present) {
isp->present = 0;
power_supply_changed(&isp->psy);
}
break;
default:
return NOTIFY_DONE;
}
return NOTIFY_OK;
}
static int isp1704_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct isp1704_charger *isp =
container_of(psy, struct isp1704_charger, psy);
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
val->intval = isp->present;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = isp->model;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = "NXP";
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property power_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static inline int isp1704_test_ulpi(struct isp1704_charger *isp)
{
int vendor;
int product;
int i;
int ret = -ENODEV;
/* Test ULPI interface */
ret = otg_io_write(isp->otg, ULPI_SCRATCH, 0xaa);
if (ret < 0)
return ret;
ret = otg_io_read(isp->otg, ULPI_SCRATCH);
if (ret < 0)
return ret;
if (ret != 0xaa)
return -ENODEV;
/* Verify the product and vendor id matches */
vendor = otg_io_read(isp->otg, ULPI_VENDOR_ID_LOW);
vendor |= otg_io_read(isp->otg, ULPI_VENDOR_ID_HIGH) << 8;
if (vendor != NXP_VENDOR_ID)
return -ENODEV;
product = otg_io_read(isp->otg, ULPI_PRODUCT_ID_LOW);
product |= otg_io_read(isp->otg, ULPI_PRODUCT_ID_HIGH) << 8;
for (i = 0; i < ARRAY_SIZE(isp170x_id); i++) {
if (product == isp170x_id[i]) {
sprintf(isp->model, "isp%x", product);
return product;
}
}
dev_err(isp->dev, "product id %x not matching known ids", product);
return -ENODEV;
}
static int __devinit isp1704_charger_probe(struct platform_device *pdev)
{
struct isp1704_charger *isp;
int ret = -ENODEV;
isp = kzalloc(sizeof *isp, GFP_KERNEL);
if (!isp)
return -ENOMEM;
isp->otg = otg_get_transceiver();
if (!isp->otg)
goto fail0;
ret = isp1704_test_ulpi(isp);
if (ret < 0)
goto fail1;
isp->dev = &pdev->dev;
platform_set_drvdata(pdev, isp);
isp->psy.name = "isp1704";
isp->psy.type = POWER_SUPPLY_TYPE_USB;
isp->psy.properties = power_props;
isp->psy.num_properties = ARRAY_SIZE(power_props);
isp->psy.get_property = isp1704_charger_get_property;
ret = power_supply_register(isp->dev, &isp->psy);
if (ret)
goto fail1;
/*
* REVISIT: using work in order to allow the otg notifications to be
* made atomically in the future.
*/
INIT_WORK(&isp->work, isp1704_charger_work);
isp->nb.notifier_call = isp1704_notifier_call;
ret = otg_register_notifier(isp->otg, &isp->nb);
if (ret)
goto fail2;
dev_info(isp->dev, "registered with product id %s\n", isp->model);
return 0;
fail2:
power_supply_unregister(&isp->psy);
fail1:
otg_put_transceiver(isp->otg);
fail0:
kfree(isp);
dev_err(&pdev->dev, "failed to register isp1704 with error %d\n", ret);
return ret;
}
static int __devexit isp1704_charger_remove(struct platform_device *pdev)
{
struct isp1704_charger *isp = platform_get_drvdata(pdev);
otg_unregister_notifier(isp->otg, &isp->nb);
power_supply_unregister(&isp->psy);
otg_put_transceiver(isp->otg);
kfree(isp);
return 0;
}
static struct platform_driver isp1704_charger_driver = {
.driver = {
.name = "isp1704_charger",
},
.probe = isp1704_charger_probe,
.remove = __devexit_p(isp1704_charger_remove),
};
static int __init isp1704_charger_init(void)
{
return platform_driver_register(&isp1704_charger_driver);
}
module_init(isp1704_charger_init);
static void __exit isp1704_charger_exit(void)
{
platform_driver_unregister(&isp1704_charger_driver);
}
module_exit(isp1704_charger_exit);
MODULE_ALIAS("platform:isp1704_charger");
MODULE_AUTHOR("Nokia Corporation");
MODULE_DESCRIPTION("ISP170x USB Charger driver");
MODULE_LICENSE("GPL");

1
drivers/power/jz4740-battery.c
View File

@ -383,6 +383,7 @@ static int __devexit jz_battery_remove(struct platform_device *pdev)
iounmap(jz_battery->base);
release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
kfree(jz_battery);
return 0;
}

8
drivers/power/olpc_battery.c
View File

@ -271,14 +271,14 @@ static int olpc_bat_get_property(struct power_supply *psy,
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 9760L / 32;
val->intval = (s16)be16_to_cpu(ec_word) * 9760L / 32;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 15625L / 120;
val->intval = (s16)be16_to_cpu(ec_word) * 15625L / 120;
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
@ -299,7 +299,7 @@ static int olpc_bat_get_property(struct power_supply *psy,
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 100 / 256;
val->intval = (s16)be16_to_cpu(ec_word) * 100 / 256;
break;
case POWER_SUPPLY_PROP_TEMP_AMBIENT:
ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
@ -313,7 +313,7 @@ static int olpc_bat_get_property(struct power_supply *psy,
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 6250 / 15;
val->intval = (s16)be16_to_cpu(ec_word) * 6250 / 15;
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);

1
drivers/power/pcf50633-charger.c
View File

@ -456,6 +456,7 @@ static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
sysfs_remove_group(&pdev->dev.kobj, &mbc_attr_group);
power_supply_unregister(&mbc->usb);
power_supply_unregister(&mbc->adapter);
power_supply_unregister(&mbc->ac);

4
drivers/power/power_supply_sysfs.c
View File

@ -42,7 +42,8 @@ static ssize_t power_supply_show_property(struct device *dev,
struct device_attribute *attr,
char *buf) {
static char *type_text[] = {
"Battery", "UPS", "Mains", "USB"
"Battery", "UPS", "Mains", "USB",
"USB_DCP", "USB_CDP", "USB_ACA"
};
static char *status_text[] = {
"Unknown", "Charging", "Discharging", "Not charging", "Full"
@ -138,6 +139,7 @@ static struct device_attribute power_supply_attrs[] = {
POWER_SUPPLY_ATTR(voltage_min_design),
POWER_SUPPLY_ATTR(voltage_now),
POWER_SUPPLY_ATTR(voltage_avg),
POWER_SUPPLY_ATTR(current_max),
POWER_SUPPLY_ATTR(current_now),
POWER_SUPPLY_ATTR(current_avg),
POWER_SUPPLY_ATTR(power_now),

565
drivers/power/twl4030_charger.c Normal file
View File

@ -0,0 +1,565 @@
/*
* TWL4030/TPS65950 BCI (Battery Charger Interface) driver
*
* Copyright (C) 2010 Gražvydas Ignotas <notasas@gmail.com>
*
* based on twl4030_bci_battery.c by TI
* Copyright (C) 2008 Texas Instruments, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/i2c/twl.h>
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/otg.h>
#define TWL4030_BCIMSTATEC 0x02
#define TWL4030_BCIICHG 0x08
#define TWL4030_BCIVAC 0x0a
#define TWL4030_BCIVBUS 0x0c
#define TWL4030_BCIMFSTS4 0x10
#define TWL4030_BCICTL1 0x23
#define TWL4030_BCIAUTOWEN BIT(5)
#define TWL4030_CONFIG_DONE BIT(4)
#define TWL4030_BCIAUTOUSB BIT(1)
#define TWL4030_BCIAUTOAC BIT(0)
#define TWL4030_CGAIN BIT(5)
#define TWL4030_USBFASTMCHG BIT(2)
#define TWL4030_STS_VBUS BIT(7)
#define TWL4030_STS_USB_ID BIT(2)
/* BCI interrupts */
#define TWL4030_WOVF BIT(0) /* Watchdog overflow */
#define TWL4030_TMOVF BIT(1) /* Timer overflow */
#define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */
#define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */
#define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */
#define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */
#define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */
#define TWL4030_BATSTS BIT(7) /* Battery status */
#define TWL4030_VBATLVL BIT(0) /* VBAT level */
#define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */
#define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */
#define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */
#define TWL4030_MSTATEC_USB BIT(4)
#define TWL4030_MSTATEC_AC BIT(5)
#define TWL4030_MSTATEC_MASK 0x0f
#define TWL4030_MSTATEC_QUICK1 0x02
#define TWL4030_MSTATEC_QUICK7 0x07
#define TWL4030_MSTATEC_COMPLETE1 0x0b
#define TWL4030_MSTATEC_COMPLETE4 0x0e
static bool allow_usb;
module_param(allow_usb, bool, 1);
MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
struct twl4030_bci {
struct device *dev;
struct power_supply ac;
struct power_supply usb;
struct otg_transceiver *transceiver;
struct notifier_block otg_nb;
int irq_chg;
int irq_bci;
};
/*
* clear and set bits on an given register on a given module
*/
static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg)
{
u8 val = 0;
int ret;
ret = twl_i2c_read_u8(mod_no, &val, reg);
if (ret)
return ret;
val &= ~clear;
val |= set;
return twl_i2c_write_u8(mod_no, val, reg);
}
static int twl4030_bci_read(u8 reg, u8 *val)
{
return twl_i2c_read_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
}
static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
{
return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, 0,
TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
TWL4030_PM_MASTER_BOOT_BCI);
}
static int twl4030bci_read_adc_val(u8 reg)
{
int ret, temp;
u8 val;
/* read MSB */
ret = twl4030_bci_read(reg + 1, &val);
if (ret)
return ret;
temp = (int)(val & 0x03) << 8;
/* read LSB */
ret = twl4030_bci_read(reg, &val);
if (ret)
return ret;
return temp | val;
}
/*
* Check if VBUS power is present
*/
static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
{
int ret;
u8 hwsts;
ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &hwsts,
TWL4030_PM_MASTER_STS_HW_CONDITIONS);
if (ret < 0)
return 0;
dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts);
/* in case we also have STS_USB_ID, VBUS is driven by TWL itself */
if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID))
return 1;
return 0;
}
/*
* Enable/Disable USB Charge funtionality.
*/
static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
{
int ret;
if (enable) {
/* Check for USB charger conneted */
if (!twl4030_bci_have_vbus(bci))
return -ENODEV;
/*
* Until we can find out what current the device can provide,
* require a module param to enable USB charging.
*/
if (!allow_usb) {
dev_warn(bci->dev, "USB charging is disabled.\n");
return -EACCES;
}
/* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
if (ret < 0)
return ret;
/* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */
ret = twl4030_clear_set(TWL4030_MODULE_MAIN_CHARGE, 0,
TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
} else {
ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
}
return ret;
}
/*
* Enable/Disable AC Charge funtionality.
*/
static int twl4030_charger_enable_ac(bool enable)
{
int ret;
if (enable)
ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
else
ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0);
return ret;
}
/*
* TWL4030 CHG_PRES (AC charger presence) events
*/
static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
{
struct twl4030_bci *bci = arg;
dev_dbg(bci->dev, "CHG_PRES irq\n");
power_supply_changed(&bci->ac);
power_supply_changed(&bci->usb);
return IRQ_HANDLED;
}
/*
* TWL4030 BCI monitoring events
*/
static irqreturn_t twl4030_bci_interrupt(int irq, void *arg)
{
struct twl4030_bci *bci = arg;
u8 irqs1, irqs2;
int ret;
ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1,
TWL4030_INTERRUPTS_BCIISR1A);
if (ret < 0)
return IRQ_HANDLED;
ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2,
TWL4030_INTERRUPTS_BCIISR2A);
if (ret < 0)
return IRQ_HANDLED;
dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1);
if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) {
/* charger state change, inform the core */
power_supply_changed(&bci->ac);
power_supply_changed(&bci->usb);
}
/* various monitoring events, for now we just log them here */
if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1))
dev_warn(bci->dev, "battery temperature out of range\n");
if (irqs1 & TWL4030_BATSTS)
dev_crit(bci->dev, "battery disconnected\n");
if (irqs2 & TWL4030_VBATOV)
dev_crit(bci->dev, "VBAT overvoltage\n");
if (irqs2 & TWL4030_VBUSOV)
dev_crit(bci->dev, "VBUS overvoltage\n");
if (irqs2 & TWL4030_ACCHGOV)
dev_crit(bci->dev, "Ac charger overvoltage\n");
return IRQ_HANDLED;
}
static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val,
void *priv)
{
struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, otg_nb);
dev_dbg(bci->dev, "OTG notify %lu\n", val);
switch (val) {
case USB_EVENT_VBUS:
case USB_EVENT_CHARGER:
twl4030_charger_enable_usb(bci, true);
break;
case USB_EVENT_NONE:
twl4030_charger_enable_usb(bci, false);
break;
}
return NOTIFY_OK;
}
/*
* TI provided formulas:
* CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85
* CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7
* Here we use integer approximation of:
* CGAIN == 0: val * 1.6618 - 0.85
* CGAIN == 1: (val * 1.6618 - 0.85) * 2
*/
static int twl4030_charger_get_current(void)
{
int curr;
int ret;
u8 bcictl1;
curr = twl4030bci_read_adc_val(TWL4030_BCIICHG);
if (curr < 0)
return curr;
ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
if (ret)
return ret;
ret = (curr * 16618 - 850 * 10000) / 10;
if (bcictl1 & TWL4030_CGAIN)
ret *= 2;
return ret;
}
/*
* Returns the main charge FSM state
* Or < 0 on failure.
*/
static int twl4030bci_state(struct twl4030_bci *bci)
{
int ret;
u8 state;
ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state);
if (ret) {
pr_err("twl4030_bci: error reading BCIMSTATEC\n");
return ret;
}
dev_dbg(bci->dev, "state: %02x\n", state);
return state;
}
static int twl4030_bci_state_to_status(int state)
{
state &= TWL4030_MSTATEC_MASK;
if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7)
return POWER_SUPPLY_STATUS_CHARGING;
else if (TWL4030_MSTATEC_COMPLETE1 <= state &&
state <= TWL4030_MSTATEC_COMPLETE4)
return POWER_SUPPLY_STATUS_FULL;
else
return POWER_SUPPLY_STATUS_NOT_CHARGING;
}
static int twl4030_bci_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
int is_charging;
int state;
int ret;
state = twl4030bci_state(bci);
if (state < 0)
return state;
if (psy->type == POWER_SUPPLY_TYPE_USB)
is_charging = state & TWL4030_MSTATEC_USB;
else
is_charging = state & TWL4030_MSTATEC_AC;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (is_charging)
val->intval = twl4030_bci_state_to_status(state);
else
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
/* charging must be active for meaningful result */
if (!is_charging)
return -ENODATA;
if (psy->type == POWER_SUPPLY_TYPE_USB) {
ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS);
if (ret < 0)
return ret;
/* BCIVBUS uses ADCIN8, 7/1023 V/step */
val->intval = ret * 6843;
} else {
ret = twl4030bci_read_adc_val(TWL4030_BCIVAC);
if (ret < 0)
return ret;
/* BCIVAC uses ADCIN11, 10/1023 V/step */
val->intval = ret * 9775;
}
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (!is_charging)
return -ENODATA;
/* current measurement is shared between AC and USB */
ret = twl4030_charger_get_current();
if (ret < 0)
return ret;
val->intval = ret;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = is_charging &&
twl4030_bci_state_to_status(state) !=
POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property twl4030_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static int __init twl4030_bci_probe(struct platform_device *pdev)
{
struct twl4030_bci *bci;
int ret;
int reg;
bci = kzalloc(sizeof(*bci), GFP_KERNEL);
if (bci == NULL)
return -ENOMEM;
bci->dev = &pdev->dev;
bci->irq_chg = platform_get_irq(pdev, 0);
bci->irq_bci = platform_get_irq(pdev, 1);
platform_set_drvdata(pdev, bci);
bci->ac.name = "twl4030_ac";
bci->ac.type = POWER_SUPPLY_TYPE_MAINS;
bci->ac.properties = twl4030_charger_props;
bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props);
bci->ac.get_property = twl4030_bci_get_property;
ret = power_supply_register(&pdev->dev, &bci->ac);
if (ret) {
dev_err(&pdev->dev, "failed to register ac: %d\n", ret);
goto fail_register_ac;
}
bci->usb.name = "twl4030_usb";
bci->usb.type = POWER_SUPPLY_TYPE_USB;
bci->usb.properties = twl4030_charger_props;
bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
bci->usb.get_property = twl4030_bci_get_property;
ret = power_supply_register(&pdev->dev, &bci->usb);
if (ret) {
dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
goto fail_register_usb;
}
ret = request_threaded_irq(bci->irq_chg, NULL,
twl4030_charger_interrupt, 0, pdev->name, bci);
if (ret < 0) {
dev_err(&pdev->dev, "could not request irq %d, status %d\n",
bci->irq_chg, ret);
goto fail_chg_irq;
}
ret = request_threaded_irq(bci->irq_bci, NULL,
twl4030_bci_interrupt, 0, pdev->name, bci);
if (ret < 0) {
dev_err(&pdev->dev, "could not request irq %d, status %d\n",
bci->irq_bci, ret);
goto fail_bci_irq;
}
bci->transceiver = otg_get_transceiver();
if (bci->transceiver != NULL) {
bci->otg_nb.notifier_call = twl4030_bci_usb_ncb;
otg_register_notifier(bci->transceiver, &bci->otg_nb);
}
/* Enable interrupts now. */
reg = ~(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
TWL4030_TBATOR1 | TWL4030_BATSTS);
ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
TWL4030_INTERRUPTS_BCIIMR1A);
if (ret < 0) {
dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
goto fail_unmask_interrupts;
}
reg = ~(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg,
TWL4030_INTERRUPTS_BCIIMR2A);
if (ret < 0)
dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
twl4030_charger_enable_ac(true);
twl4030_charger_enable_usb(bci, true);
return 0;
fail_unmask_interrupts:
if (bci->transceiver != NULL) {
otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
otg_put_transceiver(bci->transceiver);
}
free_irq(bci->irq_bci, bci);
fail_bci_irq:
free_irq(bci->irq_chg, bci);
fail_chg_irq:
power_supply_unregister(&bci->usb);
fail_register_usb:
power_supply_unregister(&bci->ac);
fail_register_ac:
platform_set_drvdata(pdev, NULL);
kfree(bci);
return ret;
}
static int __exit twl4030_bci_remove(struct platform_device *pdev)
{
struct twl4030_bci *bci = platform_get_drvdata(pdev);
twl4030_charger_enable_ac(false);
twl4030_charger_enable_usb(bci, false);
/* mask interrupts */
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
TWL4030_INTERRUPTS_BCIIMR1A);
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
TWL4030_INTERRUPTS_BCIIMR2A);
if (bci->transceiver != NULL) {
otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
otg_put_transceiver(bci->transceiver);
}
free_irq(bci->irq_bci, bci);
free_irq(bci->irq_chg, bci);
power_supply_unregister(&bci->usb);
power_supply_unregister(&bci->ac);
platform_set_drvdata(pdev, NULL);
kfree(bci);
return 0;
}
static struct platform_driver twl4030_bci_driver = {
.driver = {
.name = "twl4030_bci",
.owner = THIS_MODULE,
},
.remove = __exit_p(twl4030_bci_remove),
};
static int __init twl4030_bci_init(void)
{
return platform_driver_probe(&twl4030_bci_driver, twl4030_bci_probe);
}
module_init(twl4030_bci_init);
static void __exit twl4030_bci_exit(void)
{
platform_driver_unregister(&twl4030_bci_driver);
}
module_exit(twl4030_bci_exit);
MODULE_AUTHOR("Gražydas Ignotas");
MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:twl4030_bci");

2
drivers/power/wm831x_power.c
View File

@ -267,7 +267,6 @@ static void wm831x_config_battery(struct wm831x *wm831x)
ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
WM831X_CHG_ENA_MASK |
WM831X_CHG_FAST_MASK |
WM831X_CHG_ITERM_MASK |
WM831X_CHG_ITERM_MASK,
reg1);
if (ret != 0)
@ -612,6 +611,7 @@ static __devexit int wm831x_power_remove(struct platform_device *pdev)
power_supply_unregister(&wm831x_power->battery);
power_supply_unregister(&wm831x_power->wall);
power_supply_unregister(&wm831x_power->usb);
kfree(wm831x_power);
return 0;
}

6
include/linux/power_supply.h
View File

@ -89,6 +89,7 @@ enum power_supply_property {
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_POWER_NOW,
@ -125,7 +126,10 @@ enum power_supply_type {
POWER_SUPPLY_TYPE_BATTERY = 0,
POWER_SUPPLY_TYPE_UPS,
POWER_SUPPLY_TYPE_MAINS,
POWER_SUPPLY_TYPE_USB,
POWER_SUPPLY_TYPE_USB, /* Standard Downstream Port */
POWER_SUPPLY_TYPE_USB_DCP, /* Dedicated Charging Port */
POWER_SUPPLY_TYPE_USB_CDP, /* Charging Downstream Port */
POWER_SUPPLY_TYPE_USB_ACA, /* Accessory Charger Adapters */
};
union power_supply_propval {