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add rk29 bq27510 battery

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This commit is contained in:
lhh
2010-11-23 16:15:51 +08:00
parent 1d30828d2a
commit de6866cb47
4 changed files with 374 additions and 0 deletions
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7
arch/arm/mach-rk29/board-rk29sdk.c
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@@ -426,6 +426,13 @@ static struct i2c_board_info __initdata board_i2c0_devices[] = {
.flags = 0,
},
#endif
#if defined (CONFIG_BATTERY_BQ27510)
{
.type = "bq27510-battery",
.addr = 0x55,
.flags = 0,
},
#endif
};
#endif

6
drivers/power/Kconfig
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@@ -116,6 +116,12 @@ config BATTERY_STC3100
help
Say Y here to enable support for batteries with STC3100(I2C) chip.
config BATTERY_BQ27510
tristate "BQ27510 battery driver"
depends on I2C && ARCH_RK29
help
Say Y here to enable support for batteries with BQ27510(I2C) chip.
config BATTERY_RK2818
tristate "RK2818 battery"
depends on RK28_ADC

1
drivers/power/Makefile
View File

@@ -31,3 +31,4 @@ obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
obj-$(CONFIG_BATTERY_RK2818) += rk2818_battery.o
obj-$(CONFIG_BATTERY_STC3100) += stc3100_battery.o
obj-$(CONFIG_BATTERY_BQ27510) += bq27510_battery.o

360
drivers/power/bq27510_battery.c Normal file
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@@ -0,0 +1,360 @@
/*
* BQ27510 battery driver
*
* 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 <linux/slab.h>
#include <asm/unaligned.h>
#define DRIVER_VERSION "1.1.0"
#define BQ27x00_REG_TEMP 0x06
#define BQ27x00_REG_VOLT 0x08
#define BQ27x00_REG_AI 0x14
#define BQ27x00_REG_FLAGS 0x0A
#define BQ27x00_REG_TTE 0x16
#define BQ27x00_REG_TTF 0x18
#define BQ27x00_REG_TTECP 0x26
#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
#define BQ27000_FLAG_CHGS BIT(7)
#define BQ27500_REG_SOC 0x2c
#define BQ27500_FLAG_DSC BIT(0)
#define BQ27500_FLAG_FC BIT(9)
#define BQ27510_SPEED 300 * 1000
/* If the system has several batteries we need a different name for each
* of them...
*/
static DEFINE_MUTEX(battery_mutex);
struct bq27510_device_info {
struct device *dev;
struct power_supply bat;
struct delayed_work work;
unsigned int interval;
struct i2c_client *client;
};
static enum power_supply_property bq27510_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
};
/*
* Common code for BQ27510 devices read
*/
static int bq27510_read(struct i2c_client *client, u8 reg, u8 buf[], unsigned len)
{
int ret;
ret = i2c_master_reg8_recv(client, reg, buf, len, BQ27510_SPEED);
return ret;
}
/*
* Return the battery temperature in tenths of degree Celsius
* Or < 0 if something fails.
*/
static int bq27510_battery_temperature(struct bq27510_device_info *di)
{
int ret;
int temp = 0;
u8 buf[2];
ret = bq27510_read(di->client,BQ27x00_REG_TEMP,buf,2);
if (ret) {
dev_err(di->dev, "error reading temperature\n");
return ret;
}
temp = get_unaligned_le16(buf);
return temp - 2731;
}
/*
* Return the battery Voltage in milivolts
* Or < 0 if something fails.
*/
static int bq27510_battery_voltage(struct bq27510_device_info *di)
{
int ret;
u8 buf[2];
int volt = 0;
ret = bq27510_read(di->client,BQ27x00_REG_VOLT,buf,2);
if (ret) {
dev_err(di->dev, "error reading voltage\n");
return ret;
}
volt = get_unaligned_le16(buf);
return volt * 1000;
}
/*
* Return the battery average current
* Note that current can be negative signed as well
* Or 0 if something fails.
*/
static int bq27510_battery_current(struct bq27510_device_info *di)
{
int ret;
int curr = 0;
u8 buf[2];
ret = bq27510_read(di->client,BQ27x00_REG_AI,buf,2);
if (ret) {
dev_err(di->dev, "error reading current\n");
return 0;
}
curr = get_unaligned_le16(buf);
return curr * 1000;
}
/*
* Return the battery Relative State-of-Charge
* Or < 0 if something fails.
*/
static int bq27510_battery_rsoc(struct bq27510_device_info *di)
{
int ret;
int rsoc = 0;
u8 buf[2];
ret = bq27510_read(di->client,BQ27500_REG_SOC,buf,2);
if (ret) {
dev_err(di->dev, "error reading relative State-of-Charge\n");
return ret;
}
rsoc = get_unaligned_le16(buf);
return rsoc;
}
static int bq27510_battery_status(struct bq27510_device_info *di,
union power_supply_propval *val)
{
u8 buf[2];
int flags = 0;
int status;
int ret;
ret = bq27510_read(di->client,BQ27x00_REG_FLAGS, buf, 2);
if (ret < 0) {
dev_err(di->dev, "error reading flags\n");
return ret;
}
flags = get_unaligned_le16(buf);
if (flags & BQ27500_FLAG_FC)
status = POWER_SUPPLY_STATUS_FULL;
else if (flags & BQ27500_FLAG_DSC)
status = POWER_SUPPLY_STATUS_DISCHARGING;
else
status = POWER_SUPPLY_STATUS_CHARGING;
val->intval = status;
return 0;
}
/*
* Read a time register.
* Return < 0 if something fails.
*/
static int bq27510_battery_time(struct bq27510_device_info *di, int reg,
union power_supply_propval *val)
{
u8 buf[2];
int tval = 0;
int ret;
ret = bq27510_read(di->client,reg,buf,2);
if (ret) {
dev_err(di->dev, "error reading register %02x\n", reg);
return ret;
}
tval = get_unaligned_le16(buf);
if (tval == 65535)
return -ENODATA;
val->intval = tval * 60;
return 0;
}
#define to_bq27510_device_info(x) container_of((x), \
struct bq27510_device_info, bat);
static int bq27510_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
struct bq27510_device_info *di = to_bq27510_device_info(psy);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = bq27510_battery_status(di, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_PRESENT:
val->intval = bq27510_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 = bq27510_battery_current(di);
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = bq27510_battery_rsoc(di);
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = bq27510_battery_temperature(di);
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
ret = bq27510_battery_time(di, BQ27x00_REG_TTE, val);
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
ret = bq27510_battery_time(di, BQ27x00_REG_TTECP, val);
break;
case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
ret = bq27510_battery_time(di, BQ27x00_REG_TTF, val);
break;
default:
return -EINVAL;
}
return ret;
}
static void bq27510_powersupply_init(struct bq27510_device_info *di)
{
di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
di->bat.properties = bq27510_battery_props;
di->bat.num_properties = ARRAY_SIZE(bq27510_battery_props);
di->bat.get_property = bq27510_battery_get_property;
di->bat.external_power_changed = NULL;
}
static void bq27510_battery_update_status(struct bq27510_device_info *di)
{
power_supply_changed(&di->bat);
}
static void bq27510_battery_work(struct work_struct *work)
{
struct bq27510_device_info *di = container_of(work, struct bq27510_device_info, work.work);
bq27510_battery_update_status(di);
/* reschedule for the next time */
schedule_delayed_work(&di->work, di->interval);
}
static int bq27510_battery_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct bq27510_device_info *di;
int retval = 0;
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;
}
i2c_set_clientdata(client, di);
di->dev = &client->dev;
di->bat.name = "bq27510-battery";
di->client = client;
/* 4 seconds between monotor runs interval */
di->interval = msecs_to_jiffies(4 * 1000);
bq27510_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;
}
INIT_DELAYED_WORK(&di->work, bq27510_battery_work);
schedule_delayed_work(&di->work, di->interval);
dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION);
return 0;
batt_failed_4:
kfree(di);
batt_failed_2:
return retval;
}
static int bq27510_battery_remove(struct i2c_client *client)
{
struct bq27510_device_info *di = i2c_get_clientdata(client);
power_supply_unregister(&di->bat);
kfree(di->bat.name);
kfree(di);
return 0;
}
/*
* Module stuff
*/
static const struct i2c_device_id bq27510_id[] = {
{ "bq27510", 0 },
};
static struct i2c_driver bq27510_battery_driver = {
.driver = {
.name = "bq27510-battery",
},
.probe = bq27510_battery_probe,
.remove = bq27510_battery_remove,
.id_table = bq27510_id,
};
static int __init bq27510_battery_init(void)
{
int ret;
ret = i2c_add_driver(&bq27510_battery_driver);
if (ret)
printk(KERN_ERR "Unable to register BQ27510 driver\n");
return ret;
}
module_init(bq27510_battery_init);
static void __exit bq27510_battery_exit(void)
{
i2c_del_driver(&bq27510_battery_driver);
}
module_exit(bq27510_battery_exit);
MODULE_AUTHOR("Rockchip");
MODULE_DESCRIPTION("BQ27510 battery monitor driver");
MODULE_LICENSE("GPL");