mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
287 lines
7.8 KiB
287 lines
7.8 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
// |
|
// max8997_charger.c - Power supply consumer driver for the Maxim 8997/8966 |
|
// |
|
// Copyright (C) 2011 Samsung Electronics |
|
// MyungJoo Ham <[email protected]> |
|
|
|
#include <linux/err.h> |
|
#include <linux/extcon.h> |
|
#include <linux/module.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> |
|
#include <linux/regulator/consumer.h> |
|
#include <linux/devm-helpers.h> |
|
|
|
/* MAX8997_REG_STATUS4 */ |
|
#define DCINOK_SHIFT 1 |
|
#define DCINOK_MASK (1 << DCINOK_SHIFT) |
|
#define DETBAT_SHIFT 2 |
|
#define DETBAT_MASK (1 << DETBAT_SHIFT) |
|
|
|
/* MAX8997_REG_MBCCTRL1 */ |
|
#define TFCH_SHIFT 4 |
|
#define TFCH_MASK (7 << TFCH_SHIFT) |
|
|
|
/* MAX8997_REG_MBCCTRL5 */ |
|
#define ITOPOFF_SHIFT 0 |
|
#define ITOPOFF_MASK (0xF << ITOPOFF_SHIFT) |
|
|
|
struct charger_data { |
|
struct device *dev; |
|
struct max8997_dev *iodev; |
|
struct power_supply *battery; |
|
struct regulator *reg; |
|
struct extcon_dev *edev; |
|
struct notifier_block extcon_nb; |
|
struct work_struct extcon_work; |
|
}; |
|
|
|
static enum power_supply_property max8997_battery_props[] = { |
|
POWER_SUPPLY_PROP_STATUS, /* "FULL", "CHARGING" or "DISCHARGING". */ |
|
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 = power_supply_get_drvdata(psy); |
|
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; |
|
else if ((reg & DCINOK_MASK)) |
|
val->intval = POWER_SUPPLY_STATUS_CHARGING; |
|
else |
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
|
|
|
break; |
|
case POWER_SUPPLY_PROP_PRESENT: |
|
val->intval = 0; |
|
ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, ®); |
|
if (ret) |
|
return ret; |
|
if ((reg & DETBAT_MASK) == 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; |
|
if (reg & DCINOK_MASK) |
|
val->intval = 1; |
|
|
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void max8997_battery_extcon_evt_worker(struct work_struct *work) |
|
{ |
|
struct charger_data *charger = |
|
container_of(work, struct charger_data, extcon_work); |
|
struct extcon_dev *edev = charger->edev; |
|
int current_limit; |
|
|
|
if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) { |
|
dev_dbg(charger->dev, "USB SDP charger is connected\n"); |
|
current_limit = 450000; |
|
} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) { |
|
dev_dbg(charger->dev, "USB DCP charger is connected\n"); |
|
current_limit = 650000; |
|
} else if (extcon_get_state(edev, EXTCON_CHG_USB_FAST) > 0) { |
|
dev_dbg(charger->dev, "USB FAST charger is connected\n"); |
|
current_limit = 650000; |
|
} else if (extcon_get_state(edev, EXTCON_CHG_USB_SLOW) > 0) { |
|
dev_dbg(charger->dev, "USB SLOW charger is connected\n"); |
|
current_limit = 650000; |
|
} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) { |
|
dev_dbg(charger->dev, "USB CDP charger is connected\n"); |
|
current_limit = 650000; |
|
} else { |
|
dev_dbg(charger->dev, "USB charger is disconnected\n"); |
|
current_limit = -1; |
|
} |
|
|
|
if (current_limit > 0) { |
|
int ret = regulator_set_current_limit(charger->reg, current_limit, current_limit); |
|
|
|
if (ret) { |
|
dev_err(charger->dev, "failed to set current limit: %d\n", ret); |
|
return; |
|
} |
|
ret = regulator_enable(charger->reg); |
|
if (ret) |
|
dev_err(charger->dev, "failed to enable regulator: %d\n", ret); |
|
} else { |
|
int ret = regulator_disable(charger->reg); |
|
|
|
if (ret) |
|
dev_err(charger->dev, "failed to disable regulator: %d\n", ret); |
|
} |
|
} |
|
|
|
static int max8997_battery_extcon_evt(struct notifier_block *nb, |
|
unsigned long event, void *param) |
|
{ |
|
struct charger_data *charger = |
|
container_of(nb, struct charger_data, extcon_nb); |
|
schedule_work(&charger->extcon_work); |
|
return NOTIFY_OK; |
|
} |
|
|
|
static const struct power_supply_desc max8997_battery_desc = { |
|
.name = "max8997_pmic", |
|
.type = POWER_SUPPLY_TYPE_BATTERY, |
|
.get_property = max8997_battery_get_property, |
|
.properties = max8997_battery_props, |
|
.num_properties = ARRAY_SIZE(max8997_battery_props), |
|
}; |
|
|
|
static 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 device_node *np = pdev->dev.of_node; |
|
struct i2c_client *i2c = iodev->i2c; |
|
struct max8997_platform_data *pdata = iodev->pdata; |
|
struct power_supply_config psy_cfg = {}; |
|
|
|
if (!pdata) { |
|
dev_err(&pdev->dev, "No platform data supplied.\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (pdata->eoc_mA) { |
|
int val = (pdata->eoc_mA - 50) / 10; |
|
if (val < 0) |
|
val = 0; |
|
if (val > 0xf) |
|
val = 0xf; |
|
|
|
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL5, |
|
val << ITOPOFF_SHIFT, ITOPOFF_MASK); |
|
if (ret < 0) { |
|
dev_err(&pdev->dev, "Cannot use i2c bus.\n"); |
|
return ret; |
|
} |
|
} |
|
switch (pdata->timeout) { |
|
case 5: |
|
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL1, |
|
0x2 << TFCH_SHIFT, TFCH_MASK); |
|
break; |
|
case 6: |
|
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL1, |
|
0x3 << TFCH_SHIFT, TFCH_MASK); |
|
break; |
|
case 7: |
|
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL1, |
|
0x4 << TFCH_SHIFT, TFCH_MASK); |
|
break; |
|
case 0: |
|
ret = max8997_update_reg(i2c, MAX8997_REG_MBCCTRL1, |
|
0x7 << TFCH_SHIFT, TFCH_MASK); |
|
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 = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL); |
|
if (!charger) |
|
return -ENOMEM; |
|
|
|
platform_set_drvdata(pdev, charger); |
|
|
|
charger->dev = &pdev->dev; |
|
charger->iodev = iodev; |
|
|
|
psy_cfg.drv_data = charger; |
|
|
|
charger->battery = devm_power_supply_register(&pdev->dev, |
|
&max8997_battery_desc, |
|
&psy_cfg); |
|
if (IS_ERR(charger->battery)) { |
|
dev_err(&pdev->dev, "failed: power supply register\n"); |
|
return PTR_ERR(charger->battery); |
|
} |
|
|
|
// grab regulator from parent device's node |
|
pdev->dev.of_node = iodev->dev->of_node; |
|
charger->reg = devm_regulator_get_optional(&pdev->dev, "charger"); |
|
pdev->dev.of_node = np; |
|
if (IS_ERR(charger->reg)) { |
|
if (PTR_ERR(charger->reg) == -EPROBE_DEFER) |
|
return -EPROBE_DEFER; |
|
dev_info(&pdev->dev, "couldn't get charger regulator\n"); |
|
} |
|
charger->edev = extcon_get_extcon_dev("max8997-muic"); |
|
if (IS_ERR(charger->edev)) { |
|
dev_err_probe(charger->dev, PTR_ERR(charger->edev), |
|
"couldn't get extcon device: max8997-muic\n"); |
|
return PTR_ERR(charger->edev); |
|
} |
|
|
|
if (!IS_ERR(charger->reg) && !IS_ERR_OR_NULL(charger->edev)) { |
|
ret = devm_work_autocancel(&pdev->dev, &charger->extcon_work, |
|
max8997_battery_extcon_evt_worker); |
|
if (ret) { |
|
dev_err(&pdev->dev, "failed to add extcon evt stop action: %d\n", ret); |
|
return ret; |
|
} |
|
charger->extcon_nb.notifier_call = max8997_battery_extcon_evt; |
|
ret = devm_extcon_register_notifier_all(&pdev->dev, charger->edev, |
|
&charger->extcon_nb); |
|
if (ret) { |
|
dev_err(&pdev->dev, "failed to register extcon notifier\n"); |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct platform_device_id max8997_battery_id[] = { |
|
{ "max8997-battery", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(platform, max8997_battery_id); |
|
|
|
static struct platform_driver max8997_battery_driver = { |
|
.driver = { |
|
.name = "max8997-battery", |
|
}, |
|
.probe = max8997_battery_probe, |
|
.id_table = max8997_battery_id, |
|
}; |
|
module_platform_driver(max8997_battery_driver); |
|
|
|
MODULE_DESCRIPTION("MAXIM 8997/8966 battery control driver"); |
|
MODULE_AUTHOR("MyungJoo Ham <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|