#include <linux/devm-helpers.h>
#include <linux/interrupt.h>
#include <linux/mfd/pf1550.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#define PF1550_DEFAULT_CONSTANT_VOLT 4200000
#define PF1550_DEFAULT_MIN_SYSTEM_VOLT 3500000
#define PF1550_DEFAULT_THERMAL_TEMP 95
#define PF1550_CHARGER_IRQ_NR 5
struct pf1550_charger {
struct device *dev;
const struct pf1550_ddata *pf1550;
struct power_supply *charger;
struct power_supply *battery;
struct delayed_work vbus_sense_work;
struct delayed_work chg_sense_work;
struct delayed_work bat_sense_work;
int virqs[PF1550_CHARGER_IRQ_NR];
u32 constant_volt;
u32 min_system_volt;
u32 thermal_regulation_temp;
};
static int pf1550_get_charger_state(struct regmap *regmap, int *val)
{
unsigned int data;
int ret;
ret = regmap_read(regmap, PF1550_CHARG_REG_CHG_SNS, &data);
if (ret < 0)
return ret;
data &= PF1550_CHG_SNS_MASK;
switch (data) {
case PF1550_CHG_PRECHARGE:
case PF1550_CHG_CONSTANT_CURRENT:
case PF1550_CHG_CONSTANT_VOL:
case PF1550_CHG_EOC:
*val = POWER_SUPPLY_STATUS_CHARGING;
break;
case PF1550_CHG_DONE:
*val = POWER_SUPPLY_STATUS_FULL;
break;
case PF1550_CHG_TIMER_FAULT:
case PF1550_CHG_SUSPEND:
*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case PF1550_CHG_OFF_INV:
case PF1550_CHG_OFF_TEMP:
case PF1550_CHG_LINEAR_ONLY:
*val = POWER_SUPPLY_STATUS_DISCHARGING;
break;
default:
*val = POWER_SUPPLY_STATUS_UNKNOWN;
}
return 0;
}
static int pf1550_get_charge_type(struct regmap *regmap, int *val)
{
unsigned int data;
int ret;
ret = regmap_read(regmap, PF1550_CHARG_REG_CHG_SNS, &data);
if (ret < 0)
return ret;
data &= PF1550_CHG_SNS_MASK;
switch (data) {
case PF1550_CHG_SNS_MASK:
*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case PF1550_CHG_CONSTANT_CURRENT:
case PF1550_CHG_CONSTANT_VOL:
case PF1550_CHG_EOC:
*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case PF1550_CHG_DONE:
case PF1550_CHG_TIMER_FAULT:
case PF1550_CHG_SUSPEND:
case PF1550_CHG_OFF_INV:
case PF1550_CHG_BAT_OVER:
case PF1550_CHG_OFF_TEMP:
case PF1550_CHG_LINEAR_ONLY:
*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
default:
*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
}
return 0;
}
static int pf1550_get_battery_health(struct regmap *regmap, int *val)
{
unsigned int data;
int ret;
ret = regmap_read(regmap, PF1550_CHARG_REG_BATT_SNS, &data);
if (ret < 0)
return ret;
data &= PF1550_BAT_SNS_MASK;
switch (data) {
case PF1550_BAT_NO_DETECT:
*val = POWER_SUPPLY_HEALTH_NO_BATTERY;
break;
case PF1550_BAT_NO_VBUS:
case PF1550_BAT_LOW_THAN_PRECHARG:
case PF1550_BAT_CHARG_FAIL:
case PF1550_BAT_HIGH_THAN_PRECHARG:
*val = POWER_SUPPLY_HEALTH_GOOD;
break;
case PF1550_BAT_OVER_VOL:
*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
break;
default:
*val = POWER_SUPPLY_HEALTH_UNKNOWN;
break;
}
return 0;
}
static int pf1550_get_present(struct regmap *regmap, int *val)
{
unsigned int data;
int ret;
ret = regmap_read(regmap, PF1550_CHARG_REG_BATT_SNS, &data);
if (ret < 0)
return ret;
data &= PF1550_BAT_SNS_MASK;
*val = (data == PF1550_BAT_NO_DETECT) ? 0 : 1;
return 0;
}
static int pf1550_get_online(struct regmap *regmap, int *val)
{
unsigned int data;
int ret;
ret = regmap_read(regmap, PF1550_CHARG_REG_VBUS_SNS, &data);
if (ret < 0)
return ret;
*val = (data & PF1550_VBUS_VALID) ? 1 : 0;
return 0;
}
static void pf1550_chg_bat_work(struct work_struct *work)
{
struct pf1550_charger *chg = container_of(to_delayed_work(work),
struct pf1550_charger,
bat_sense_work);
unsigned int data;
if (regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_BATT_SNS, &data)) {
dev_err(chg->dev, "Read BATT_SNS error.\n");
return;
}
switch (data & PF1550_BAT_SNS_MASK) {
case PF1550_BAT_NO_VBUS:
dev_dbg(chg->dev, "No valid VBUS input.\n");
break;
case PF1550_BAT_LOW_THAN_PRECHARG:
dev_dbg(chg->dev, "VBAT < VPRECHG.LB.\n");
break;
case PF1550_BAT_CHARG_FAIL:
dev_dbg(chg->dev, "Battery charging failed.\n");
break;
case PF1550_BAT_HIGH_THAN_PRECHARG:
dev_dbg(chg->dev, "VBAT > VPRECHG.LB.\n");
break;
case PF1550_BAT_OVER_VOL:
dev_dbg(chg->dev, "VBAT > VBATOV.\n");
break;
case PF1550_BAT_NO_DETECT:
dev_dbg(chg->dev, "Battery not detected.\n");
break;
default:
dev_err(chg->dev, "Unknown value read:%x\n",
data & PF1550_CHG_SNS_MASK);
}
}
static void pf1550_chg_chg_work(struct work_struct *work)
{
struct pf1550_charger *chg = container_of(to_delayed_work(work),
struct pf1550_charger,
chg_sense_work);
unsigned int data;
if (regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_CHG_SNS, &data)) {
dev_err(chg->dev, "Read CHG_SNS error.\n");
return;
}
switch (data & PF1550_CHG_SNS_MASK) {
case PF1550_CHG_PRECHARGE:
dev_dbg(chg->dev, "In pre-charger mode.\n");
break;
case PF1550_CHG_CONSTANT_CURRENT:
dev_dbg(chg->dev, "In fast-charge constant current mode.\n");
break;
case PF1550_CHG_CONSTANT_VOL:
dev_dbg(chg->dev, "In fast-charge constant voltage mode.\n");
break;
case PF1550_CHG_EOC:
dev_dbg(chg->dev, "In EOC mode.\n");
break;
case PF1550_CHG_DONE:
dev_dbg(chg->dev, "In DONE mode.\n");
break;
case PF1550_CHG_TIMER_FAULT:
dev_info(chg->dev, "In timer fault mode.\n");
break;
case PF1550_CHG_SUSPEND:
dev_info(chg->dev, "In thermistor suspend mode.\n");
break;
case PF1550_CHG_OFF_INV:
dev_info(chg->dev, "Input invalid, charger off.\n");
break;
case PF1550_CHG_BAT_OVER:
dev_warn(chg->dev, "Battery over-voltage.\n");
break;
case PF1550_CHG_OFF_TEMP:
dev_info(chg->dev, "Temp high, charger off.\n");
break;
case PF1550_CHG_LINEAR_ONLY:
dev_dbg(chg->dev, "In Linear mode, not charging.\n");
break;
default:
dev_err(chg->dev, "Unknown value read:%x\n",
data & PF1550_CHG_SNS_MASK);
}
}
static void pf1550_chg_vbus_work(struct work_struct *work)
{
struct pf1550_charger *chg = container_of(to_delayed_work(work),
struct pf1550_charger,
vbus_sense_work);
unsigned int data;
if (regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_VBUS_SNS, &data)) {
dev_err(chg->dev, "Read VBUS_SNS error.\n");
return;
}
if (data & PF1550_VBUS_UVLO) {
dev_dbg(chg->dev, "VBUS detached.\n");
power_supply_changed(chg->battery);
}
if (data & PF1550_VBUS_IN2SYS)
dev_dbg(chg->dev, "VBUS_IN2SYS_SNS.\n");
if (data & PF1550_VBUS_OVLO)
dev_dbg(chg->dev, "VBUS_OVLO_SNS.\n");
if (data & PF1550_VBUS_VALID) {
dev_dbg(chg->dev, "VBUS attached.\n");
power_supply_changed(chg->charger);
}
}
static irqreturn_t pf1550_charger_irq_handler(int irq, void *data)
{
struct pf1550_charger *chg = data;
struct device *dev = chg->dev;
int i, irq_type = -1;
for (i = 0; i < PF1550_CHARGER_IRQ_NR; i++)
if (irq == chg->virqs[i])
irq_type = i;
switch (irq_type) {
case PF1550_CHARG_IRQ_BAT2SOCI:
dev_info(dev, "BAT to SYS Overcurrent interrupt.\n");
break;
case PF1550_CHARG_IRQ_BATI:
schedule_delayed_work(&chg->bat_sense_work,
msecs_to_jiffies(10));
break;
case PF1550_CHARG_IRQ_CHGI:
schedule_delayed_work(&chg->chg_sense_work,
msecs_to_jiffies(10));
break;
case PF1550_CHARG_IRQ_VBUSI:
schedule_delayed_work(&chg->vbus_sense_work,
msecs_to_jiffies(10));
break;
case PF1550_CHARG_IRQ_THMI:
dev_info(dev, "Thermal interrupt.\n");
break;
default:
dev_err(dev, "unknown interrupt occurred.\n");
}
return IRQ_HANDLED;
}
static enum power_supply_property pf1550_charger_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property pf1550_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static int pf1550_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct pf1550_charger *chg = power_supply_get_drvdata(psy);
struct regmap *regmap = chg->pf1550->regmap;
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = pf1550_get_charger_state(regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = pf1550_get_charge_type(regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = pf1550_get_battery_health(regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_PRESENT:
ret = pf1550_get_present(regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = pf1550_get_online(regmap, &val->intval);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = "PF1550";
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = "NXP";
break;
default:
return -EINVAL;
}
return ret;
}
static const struct power_supply_desc pf1550_charger_desc = {
.name = "pf1550-charger",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = pf1550_charger_props,
.num_properties = ARRAY_SIZE(pf1550_charger_props),
.get_property = pf1550_charger_get_property,
};
static const struct power_supply_desc pf1550_battery_desc = {
.name = "pf1550-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = pf1550_battery_props,
.num_properties = ARRAY_SIZE(pf1550_battery_props),
.get_property = pf1550_charger_get_property,
};
static int pf1550_set_constant_volt(struct pf1550_charger *chg,
unsigned int uvolt)
{
unsigned int data;
if (uvolt >= 3500000 && uvolt <= 4440000)
data = 8 + (uvolt - 3500000) / 20000;
else
return dev_err_probe(chg->dev, -EINVAL,
"Wrong value for constant voltage\n");
dev_dbg(chg->dev, "Charging constant voltage: %u (0x%x)\n", uvolt,
data);
return regmap_update_bits(chg->pf1550->regmap,
PF1550_CHARG_REG_BATT_REG,
PF1550_CHARG_REG_BATT_REG_CHGCV_MASK, data);
}
static int pf1550_set_min_system_volt(struct pf1550_charger *chg,
unsigned int uvolt)
{
unsigned int data;
switch (uvolt) {
case 3500000:
data = 0x0;
break;
case 3700000:
data = 0x1;
break;
case 4300000:
data = 0x2;
break;
default:
return dev_err_probe(chg->dev, -EINVAL,
"Wrong value for minimum system voltage\n");
}
data <<= PF1550_CHARG_REG_BATT_REG_VMINSYS_SHIFT;
dev_dbg(chg->dev, "Minimum system regulation voltage: %u (0x%x)\n",
uvolt, data);
return regmap_update_bits(chg->pf1550->regmap,
PF1550_CHARG_REG_BATT_REG,
PF1550_CHARG_REG_BATT_REG_VMINSYS_MASK, data);
}
static int pf1550_set_thermal_regulation_temp(struct pf1550_charger *chg,
unsigned int cells)
{
unsigned int data;
switch (cells) {
case 80:
data = 0x0;
break;
case 95:
data = 0x1;
break;
case 110:
data = 0x2;
break;
case 125:
data = 0x3;
break;
default:
return dev_err_probe(chg->dev, -EINVAL,
"Wrong value for thermal temperature\n");
}
data <<= PF1550_CHARG_REG_THM_REG_CNFG_REGTEMP_SHIFT;
dev_dbg(chg->dev, "Thermal regulation loop temperature: %u (0x%x)\n",
cells, data);
return regmap_update_bits(chg->pf1550->regmap,
PF1550_CHARG_REG_THM_REG_CNFG,
PF1550_CHARG_REG_THM_REG_CNFG_REGTEMP_MASK,
data);
}
static int pf1550_reg_init(struct pf1550_charger *chg)
{
struct power_supply_battery_info *info;
struct device *dev = chg->dev;
int ret;
ret = regmap_write(chg->pf1550->regmap, PF1550_CHARG_REG_CHG_INT_MASK,
PF1550_CHG_INT_MASK);
if (ret)
return dev_err_probe(dev, ret,
"Error unmask charger interrupt\n");
ret = pf1550_set_constant_volt(chg, chg->constant_volt);
if (ret)
return ret;
ret = pf1550_set_min_system_volt(chg, chg->min_system_volt);
if (ret)
return ret;
ret = pf1550_set_thermal_regulation_temp(chg,
chg->thermal_regulation_temp);
if (ret)
return ret;
if (power_supply_get_battery_info(chg->charger, &info)) {
ret = regmap_write(chg->pf1550->regmap,
PF1550_CHARG_REG_CHG_OPER,
PF1550_CHG_BAT_ON);
if (ret)
return dev_err_probe(dev, ret,
"Error turn on charger\n");
}
return 0;
}
static void pf1550_dt_parse_dev_info(struct pf1550_charger *chg)
{
struct power_supply_battery_info *info;
struct device *dev = chg->dev;
if (device_property_read_u32(dev->parent, "nxp,min-system-microvolt",
&chg->min_system_volt))
chg->min_system_volt = PF1550_DEFAULT_MIN_SYSTEM_VOLT;
if (device_property_read_u32(dev->parent,
"nxp,thermal-regulation-celsius",
&chg->thermal_regulation_temp))
chg->thermal_regulation_temp = PF1550_DEFAULT_THERMAL_TEMP;
if (power_supply_get_battery_info(chg->charger, &info))
chg->constant_volt = PF1550_DEFAULT_CONSTANT_VOLT;
else
chg->constant_volt = info->constant_charge_voltage_max_uv;
}
static int pf1550_charger_probe(struct platform_device *pdev)
{
const struct pf1550_ddata *pf1550 = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {};
struct pf1550_charger *chg;
int i, irq, ret;
chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
if (!chg)
return -ENOMEM;
chg->dev = &pdev->dev;
chg->pf1550 = pf1550;
if (!chg->pf1550->regmap)
return dev_err_probe(&pdev->dev, -ENODEV,
"failed to get regmap\n");
platform_set_drvdata(pdev, chg);
ret = devm_delayed_work_autocancel(chg->dev, &chg->vbus_sense_work,
pf1550_chg_vbus_work);
if (ret)
return dev_err_probe(chg->dev, ret,
"failed to add vbus sense work\n");
ret = devm_delayed_work_autocancel(chg->dev, &chg->chg_sense_work,
pf1550_chg_chg_work);
if (ret)
return dev_err_probe(chg->dev, ret,
"failed to add charger sense work\n");
ret = devm_delayed_work_autocancel(chg->dev, &chg->bat_sense_work,
pf1550_chg_bat_work);
if (ret)
return dev_err_probe(chg->dev, ret,
"failed to add battery sense work\n");
psy_cfg.drv_data = chg;
chg->charger = devm_power_supply_register(&pdev->dev,
&pf1550_charger_desc,
&psy_cfg);
if (IS_ERR(chg->charger))
return dev_err_probe(&pdev->dev, PTR_ERR(chg->charger),
"failed: power supply register\n");
chg->battery = devm_power_supply_register(&pdev->dev,
&pf1550_battery_desc,
&psy_cfg);
if (IS_ERR(chg->battery))
return dev_err_probe(&pdev->dev, PTR_ERR(chg->battery),
"failed: power supply register\n");
for (i = 0; i < PF1550_CHARGER_IRQ_NR; i++) {
irq = platform_get_irq(pdev, i);
if (irq < 0)
return irq;
chg->virqs[i] = irq;
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
pf1550_charger_irq_handler,
IRQF_NO_SUSPEND,
"pf1550-charger", chg);
if (ret)
return dev_err_probe(&pdev->dev, ret,
"failed irq request\n");
}
pf1550_dt_parse_dev_info(chg);
return pf1550_reg_init(chg);
}
static const struct platform_device_id pf1550_charger_id[] = {
{ "pf1550-charger", },
{ }
};
MODULE_DEVICE_TABLE(platform, pf1550_charger_id);
static struct platform_driver pf1550_charger_driver = {
.driver = {
.name = "pf1550-charger",
},
.probe = pf1550_charger_probe,
.id_table = pf1550_charger_id,
};
module_platform_driver(pf1550_charger_driver);
MODULE_AUTHOR("Robin Gong <yibin.gong@freescale.com>");
MODULE_DESCRIPTION("PF1550 charger driver");
MODULE_LICENSE("GPL");
