209 lines
5.3 KiB
C
209 lines
5.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
//
|
|
// max8998_charger.c - Power supply consumer driver for the Maxim 8998/LP3974
|
|
//
|
|
// Copyright (C) 2009-2010 Samsung Electronics
|
|
// MyungJoo Ham <myungjoo.ham@samsung.com>
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/power_supply.h>
|
|
#include <linux/mfd/max8998.h>
|
|
#include <linux/mfd/max8998-private.h>
|
|
|
|
struct max8998_battery_data {
|
|
struct device *dev;
|
|
struct max8998_dev *iodev;
|
|
struct power_supply *battery;
|
|
};
|
|
|
|
static enum power_supply_property max8998_battery_props[] = {
|
|
POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
|
|
POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
|
|
POWER_SUPPLY_PROP_STATUS, /* charger is charging/discharging/full */
|
|
};
|
|
|
|
/* Note that the charger control is done by a current regulator "CHARGER" */
|
|
static int max8998_battery_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct max8998_battery_data *max8998 = power_supply_get_drvdata(psy);
|
|
struct i2c_client *i2c = max8998->iodev->i2c;
|
|
int ret;
|
|
u8 reg;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, ®);
|
|
if (ret)
|
|
return ret;
|
|
if (reg & (1 << 4))
|
|
val->intval = 0;
|
|
else
|
|
val->intval = 1;
|
|
break;
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, ®);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (reg & (1 << 5))
|
|
val->intval = 1;
|
|
else
|
|
val->intval = 0;
|
|
|
|
break;
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, ®);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (!(reg & (1 << 5))) {
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
} else {
|
|
if (reg & (1 << 6))
|
|
val->intval = POWER_SUPPLY_STATUS_FULL;
|
|
else if (reg & (1 << 3))
|
|
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
|
else
|
|
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
}
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct power_supply_desc max8998_battery_desc = {
|
|
.name = "max8998_pmic",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.get_property = max8998_battery_get_property,
|
|
.properties = max8998_battery_props,
|
|
.num_properties = ARRAY_SIZE(max8998_battery_props),
|
|
};
|
|
|
|
static int max8998_battery_probe(struct platform_device *pdev)
|
|
{
|
|
struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
|
struct max8998_platform_data *pdata = iodev->pdata;
|
|
struct power_supply_config psy_cfg = {};
|
|
struct max8998_battery_data *max8998;
|
|
struct i2c_client *i2c;
|
|
int ret = 0;
|
|
|
|
if (!pdata) {
|
|
dev_err(pdev->dev.parent, "No platform init data supplied\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_battery_data),
|
|
GFP_KERNEL);
|
|
if (!max8998)
|
|
return -ENOMEM;
|
|
|
|
max8998->dev = &pdev->dev;
|
|
max8998->iodev = iodev;
|
|
platform_set_drvdata(pdev, max8998);
|
|
i2c = max8998->iodev->i2c;
|
|
|
|
/* Setup "End of Charge" */
|
|
/* If EOC value equals 0,
|
|
* remain value set from bootloader or default value */
|
|
if (pdata->eoc >= 10 && pdata->eoc <= 45) {
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR1,
|
|
(pdata->eoc / 5 - 2) << 5, 0x7 << 5);
|
|
} else if (pdata->eoc == 0) {
|
|
dev_dbg(max8998->dev,
|
|
"EOC value not set: leave it unchanged.\n");
|
|
} else {
|
|
dev_err(max8998->dev, "Invalid EOC value\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Setup Charge Restart Level */
|
|
switch (pdata->restart) {
|
|
case 100:
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x1 << 3, 0x3 << 3);
|
|
break;
|
|
case 150:
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x0 << 3, 0x3 << 3);
|
|
break;
|
|
case 200:
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x2 << 3, 0x3 << 3);
|
|
break;
|
|
case -1:
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x3 << 3, 0x3 << 3);
|
|
break;
|
|
case 0:
|
|
dev_dbg(max8998->dev,
|
|
"Restart Level not set: leave it unchanged.\n");
|
|
break;
|
|
default:
|
|
dev_err(max8998->dev, "Invalid Restart Level\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Setup Charge Full Timeout */
|
|
switch (pdata->timeout) {
|
|
case 5:
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x0 << 4, 0x3 << 4);
|
|
break;
|
|
case 6:
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x1 << 4, 0x3 << 4);
|
|
break;
|
|
case 7:
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x2 << 4, 0x3 << 4);
|
|
break;
|
|
case -1:
|
|
max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x3 << 4, 0x3 << 4);
|
|
break;
|
|
case 0:
|
|
dev_dbg(max8998->dev,
|
|
"Full Timeout not set: leave it unchanged.\n");
|
|
break;
|
|
default:
|
|
dev_err(max8998->dev, "Invalid Full Timeout value\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
psy_cfg.drv_data = max8998;
|
|
|
|
max8998->battery = devm_power_supply_register(max8998->dev,
|
|
&max8998_battery_desc,
|
|
&psy_cfg);
|
|
if (IS_ERR(max8998->battery)) {
|
|
ret = PTR_ERR(max8998->battery);
|
|
dev_err(max8998->dev, "failed: power supply register: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id max8998_battery_id[] = {
|
|
{ "max8998-battery", TYPE_MAX8998 },
|
|
{ }
|
|
};
|
|
|
|
static struct platform_driver max8998_battery_driver = {
|
|
.driver = {
|
|
.name = "max8998-battery",
|
|
},
|
|
.probe = max8998_battery_probe,
|
|
.id_table = max8998_battery_id,
|
|
};
|
|
|
|
module_platform_driver(max8998_battery_driver);
|
|
|
|
MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
|
|
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:max8998-battery");
|