power_supply: Add charger driver for MAX8997/8966
MAX8997/8966 chip is a multi-function device which includes PMIC, RTC, Fuel Gauge, MUIC, Haptic, Flash control, and Battery charging control. The driver for it is located at drivers/mfd. This patch supports battery charging control of MAX8997/8966 chip and provides power supply class information to userspace. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: KyungMin Park <kyungmin.park@samsung.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
parent
7c4509b4cd
commit
149c077b4b
@ -228,4 +228,11 @@ config CHARGER_GPIO
|
||||
This driver can be build as a module. If so, the module will be
|
||||
called gpio-charger.
|
||||
|
||||
config CHARGER_MAX8997
|
||||
tristate "Maxim MAX8997/MAX8966 PMIC battery charger driver"
|
||||
depends on MFD_MAX8997 && REGULATOR_MAX8997
|
||||
help
|
||||
Say Y to enable support for the battery charger control sysfs and
|
||||
platform data of MAX8997/LP3974 PMICs.
|
||||
|
||||
endif # POWER_SUPPLY
|
||||
|
@ -35,3 +35,4 @@ obj-$(CONFIG_CHARGER_ISP1704) += isp1704_charger.o
|
||||
obj-$(CONFIG_CHARGER_MAX8903) += max8903_charger.o
|
||||
obj-$(CONFIG_CHARGER_TWL4030) += twl4030_charger.o
|
||||
obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
|
||||
obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
|
||||
|
206
drivers/power/max8997_charger.c
Normal file
206
drivers/power/max8997_charger.c
Normal file
@ -0,0 +1,206 @@
|
||||
/*
|
||||
* max8997_charger.c - Power supply consumer driver for the Maxim 8997/8966
|
||||
*
|
||||
* Copyright (C) 2011 Samsung Electronics
|
||||
* MyungJoo Ham <myungjoo.ham@samsung.com>
|
||||
*
|
||||
* 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/err.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/power_supply.h>
|
||||
#include <linux/mfd/max8997.h>
|
||||
#include <linux/mfd/max8997-private.h>
|
||||
|
||||
struct charger_data {
|
||||
struct device *dev;
|
||||
struct max8997_dev *iodev;
|
||||
struct power_supply battery;
|
||||
};
|
||||
|
||||
static enum power_supply_property max8997_battery_props[] = {
|
||||
POWER_SUPPLY_PROP_STATUS, /* "FULL" or "NOT FULL" only. */
|
||||
POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
|
||||
POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
|
||||
};
|
||||
|
||||
/* Note that the charger control is done by a current regulator "CHARGER" */
|
||||
static int max8997_battery_get_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
struct charger_data *charger = container_of(psy,
|
||||
struct charger_data, battery);
|
||||
struct i2c_client *i2c = charger->iodev->i2c;
|
||||
int ret;
|
||||
u8 reg;
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_STATUS:
|
||||
val->intval = 0;
|
||||
ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, ®);
|
||||
if (ret)
|
||||
return ret;
|
||||
if ((reg & (1 << 0)) == 0x1)
|
||||
val->intval = POWER_SUPPLY_STATUS_FULL;
|
||||
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_PRESENT:
|
||||
val->intval = 0;
|
||||
ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, ®);
|
||||
if (ret)
|
||||
return ret;
|
||||
if ((reg & (1 << 2)) == 0x0)
|
||||
val->intval = 1;
|
||||
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_ONLINE:
|
||||
val->intval = 0;
|
||||
ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, ®);
|
||||
if (ret)
|
||||
return ret;
|
||||
/* DCINOK */
|
||||
if (reg & (1 << 1))
|
||||
val->intval = 1;
|
||||
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __devinit int max8997_battery_probe(struct platform_device *pdev)
|
||||
{
|
||||
int ret = 0;
|
||||
struct charger_data *charger;
|
||||
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
||||
struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
|
||||
|
||||
if (!pdata)
|
||||
return -EINVAL;
|
||||
|
||||
if (pdata->eoc_mA) {
|
||||
u8 val = (pdata->eoc_mA - 50) / 10;
|
||||
if (val < 0)
|
||||
val = 0;
|
||||
if (val > 0xf)
|
||||
val = 0xf;
|
||||
|
||||
ret = max8997_update_reg(iodev->i2c,
|
||||
MAX8997_REG_MBCCTRL5, val, 0xf);
|
||||
if (ret < 0) {
|
||||
dev_err(&pdev->dev, "Cannot use i2c bus.\n");
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
switch (pdata->timeout) {
|
||||
case 5:
|
||||
ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
|
||||
0x2 << 4, 0x7 << 4);
|
||||
break;
|
||||
case 6:
|
||||
ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
|
||||
0x3 << 4, 0x7 << 4);
|
||||
break;
|
||||
case 7:
|
||||
ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
|
||||
0x4 << 4, 0x7 << 4);
|
||||
break;
|
||||
case 0:
|
||||
ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1,
|
||||
0x7 << 4, 0x7 << 4);
|
||||
break;
|
||||
default:
|
||||
dev_err(&pdev->dev, "incorrect timeout value (%d)\n",
|
||||
pdata->timeout);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (ret < 0) {
|
||||
dev_err(&pdev->dev, "Cannot use i2c bus.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
charger = kzalloc(sizeof(struct charger_data), GFP_KERNEL);
|
||||
if (charger == NULL) {
|
||||
dev_err(&pdev->dev, "Cannot allocate memory.\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, charger);
|
||||
|
||||
charger->battery.name = "max8997_pmic";
|
||||
charger->battery.type = POWER_SUPPLY_TYPE_BATTERY;
|
||||
charger->battery.get_property = max8997_battery_get_property;
|
||||
charger->battery.properties = max8997_battery_props;
|
||||
charger->battery.num_properties = ARRAY_SIZE(max8997_battery_props);
|
||||
|
||||
charger->dev = &pdev->dev;
|
||||
charger->iodev = iodev;
|
||||
|
||||
ret = power_supply_register(&pdev->dev, &charger->battery);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "failed: power supply register\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
err:
|
||||
kfree(charger);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit max8997_battery_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct charger_data *charger = platform_get_drvdata(pdev);
|
||||
|
||||
power_supply_unregister(&charger->battery);
|
||||
kfree(charger);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct platform_device_id max8997_battery_id[] = {
|
||||
{ "max8997-battery", 0 },
|
||||
};
|
||||
|
||||
static struct platform_driver max8997_battery_driver = {
|
||||
.driver = {
|
||||
.name = "max8997-battery",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = max8997_battery_probe,
|
||||
.remove = __devexit_p(max8997_battery_remove),
|
||||
.id_table = max8997_battery_id,
|
||||
};
|
||||
|
||||
static int __init max8997_battery_init(void)
|
||||
{
|
||||
return platform_driver_register(&max8997_battery_driver);
|
||||
}
|
||||
subsys_initcall(max8997_battery_init);
|
||||
|
||||
static void __exit max8997_battery_cleanup(void)
|
||||
{
|
||||
platform_driver_unregister(&max8997_battery_driver);
|
||||
}
|
||||
module_exit(max8997_battery_cleanup);
|
||||
|
||||
MODULE_DESCRIPTION("MAXIM 8997/8966 battery control driver");
|
||||
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
|
||||
MODULE_LICENSE("GPL");
|
@ -107,11 +107,16 @@ struct max8997_platform_data {
|
||||
unsigned int buck5_voltage[8];
|
||||
bool buck5_gpiodvs;
|
||||
|
||||
/* ---- Charger control ---- */
|
||||
/* eoc stands for 'end of charge' */
|
||||
int eoc_mA; /* 50 ~ 200mA by 10mA step */
|
||||
/* charge Full Timeout */
|
||||
int timeout; /* 0 (no timeout), 5, 6, 7 hours */
|
||||
|
||||
/* MUIC: Not implemented */
|
||||
/* HAPTIC: Not implemented */
|
||||
/* RTC: Not implemented */
|
||||
/* Flash: Not implemented */
|
||||
/* Charger control: Not implemented */
|
||||
};
|
||||
|
||||
#endif /* __LINUX_MFD_MAX8998_H */
|
||||
|
Loading…
Reference in New Issue
Block a user