| Message ID | 20250611-pf1550-v6-5-34f2ddfe045e@savoirfairelinux.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | add support for pf1550 PMIC MFD-based drivers | expand |
On Wed, Jun 11, 2025 at 04:03:02PM -0400, Samuel Kayode via B4 Relay wrote: > From: Samuel Kayode <samuel.kayode@savoirfairelinux.com> > > Add support for the battery charger for pf1550 PMIC. > > Signed-off-by: Samuel Kayode <samuel.kayode@savoirfairelinux.com> > --- > v6: > - Drop lock entirely > - Reverse christmas tree order for variables defined in probe as > suggested by Frank > - return pf1550_reg_init > v5: > - Drop lock for battery and charger delayed_work > - More conservative locking in vbus delayed_work > - Apply lock when setting power supply type during register initialization > v4: > - Finish handling of some interrupts in threaded irq handler > - Use platform_get_irq > v3: > - Use struct power_supply_get_battery_info to get constant charge > voltage if specified > - Use virqs mapped in MFD driver > v2: > - Address feedback from Enric Balletbo Serra > --- > drivers/power/supply/Kconfig | 11 + > drivers/power/supply/Makefile | 1 + > drivers/power/supply/pf1550-charger.c | 633 ++++++++++++++++++++++++++++++++++ > 3 files changed, 645 insertions(+) > > diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig > index 79ddb006e2dad6bf96b71ed570a37c006b5f9433..6d0c872edac1f45da314632e671af1aeda4c87b8 100644 > --- a/drivers/power/supply/Kconfig > +++ b/drivers/power/supply/Kconfig > @@ -471,6 +471,17 @@ config CHARGER_88PM860X > help > Say Y here to enable charger for Marvell 88PM860x chip. > > +config CHARGER_PF1550 > + tristate "NXP PF1550 battery charger driver" > + depends on MFD_PF1550 > + help > + Say Y to enable support for the NXP PF1550 battery charger. > + The device is a single cell Li-Ion/Li-Polymer battery charger for > + portable application. > + > + This driver can also be built as a module. If so, the module will be > + called pf1550-charger. > + > config BATTERY_RX51 > tristate "Nokia RX-51 (N900) battery driver" > depends on TWL4030_MADC > diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile > index 4f5f8e3507f80da02812f0d08c2d81ddff0a272f..7f68380099c59dab71b73120150612a23e16a745 100644 > --- a/drivers/power/supply/Makefile > +++ b/drivers/power/supply/Makefile > @@ -64,6 +64,7 @@ obj-$(CONFIG_CHARGER_RT9467) += rt9467-charger.o > obj-$(CONFIG_CHARGER_RT9471) += rt9471.o > obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o > obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o > +obj-$(CONFIG_CHARGER_PF1550) += pf1550-charger.o > obj-$(CONFIG_BATTERY_RX51) += rx51_battery.o > obj-$(CONFIG_AB8500_BM) += ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o ab8500_chargalg.o > obj-$(CONFIG_CHARGER_CPCAP) += cpcap-charger.o > diff --git a/drivers/power/supply/pf1550-charger.c b/drivers/power/supply/pf1550-charger.c > new file mode 100644 > index 0000000000000000000000000000000000000000..3b4cdf4cab9659005f86ffb32e8457c7cb3065f9 > --- /dev/null > +++ b/drivers/power/supply/pf1550-charger.c > @@ -0,0 +1,633 @@ > +// SPDX-License-Identifier: GPL-2.0 > +// > +// pf1550_charger.c - charger driver for the PF1550 > +// > +// Copyright (C) 2016 Freescale Semiconductor, Inc. > +// Robin Gong <yibin.gong@freescale.com> > +// > +// Portions Copyright (c) 2025 Savoir-faire Linux Inc. > +// Samuel Kayode <samuel.kayode@savoirfairelinux.com> > +// > + > +#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_CHARGER_NAME "pf1550-charger" > +#define PF1550_DEFAULT_CONSTANT_VOLT 4200000 > +#define PF1550_DEFAULT_MIN_SYSTEM_VOLT 3500000 > +#define PF1550_DEFAULT_THERMAL_TEMP 75 > +#define PF1550_CHARGER_IRQ_NR 5 > + > +static const char *pf1550_charger_model = "PF1550"; > +static const char *pf1550_charger_manufacturer = "NXP"; nit: these const string just use once, needn't such varible. > + > +struct pf1550_charger { > + struct device *dev; > + const struct pf1550_dev *pf1550; > + struct power_supply *charger; > + struct power_supply_desc psy_desc; > + struct delayed_work vbus_sense_work; > + struct delayed_work chg_sense_work; > + struct delayed_work bat_sense_work; > + > + u32 constant_volt; > + u32 min_system_volt; > + u32 thermal_regulation_temp; > +}; > + > +static int pf1550_get_charger_state(struct regmap *regmap, int *val) > +{ > + int ret; > + unsigned int data; nit: use reverise christmas order, check other function. > + > + 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: > + *val = POWER_SUPPLY_STATUS_CHARGING; > + break; > + case PF1550_CHG_CONSTANT_VOL: > + *val = POWER_SUPPLY_STATUS_CHARGING; > + break; > + 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) > +{ > + int ret; > + unsigned int data; > + > + 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; > +} > + > +/* > + * Supported health statuses: > + * - POWER_SUPPLY_HEALTH_DEAD > + * - POWER_SUPPLY_HEALTH_GOOD > + * - POWER_SUPPLY_HEALTH_OVERVOLTAGE > + * - POWER_SUPPLY_HEALTH_UNKNOWN > + */ > +static int pf1550_get_battery_health(struct regmap *regmap, int *val) > +{ > + int ret; > + unsigned int data; > + > + 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_DEAD; > + 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 (!chg->charger) > + return; > + > + 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 (!chg->charger) > + return; > + > + 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_info(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; > + bool psy_changed = false; > + > + if (!chg->charger) > + return; > + > + 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) { > + chg->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY; > + psy_changed = true; > + dev_dbg(chg->dev, "VBUS detached.\n"); > + } > + 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) { > + chg->psy_desc.type = POWER_SUPPLY_TYPE_MAINS; > + psy_changed = true; > + dev_dbg(chg->dev, "VBUS attached.\n"); > + } > + > + if (psy_changed) > + 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; > + struct platform_device *pdev = to_platform_device(dev); > + int i, irq_type = -1; > + > + for (i = 0; i < PF1550_CHARGER_IRQ_NR; i++) > + if (irq == platform_get_irq(pdev, i)) > + irq_type = i; generally save irq number to pf1550_charger at probe, needn't call platform_get_irq to get from dts again. Frank > + > + 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_STATUS, > + POWER_SUPPLY_PROP_CHARGE_TYPE, > + POWER_SUPPLY_PROP_HEALTH, > + POWER_SUPPLY_PROP_PRESENT, > + POWER_SUPPLY_PROP_ONLINE, > + 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_charger_model; > + break; > + case POWER_SUPPLY_PROP_MANUFACTURER: > + val->strval = pf1550_charger_manufacturer; > + break; > + default: > + return -EINVAL; > + } > + > + return ret; > +} > + > +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 60: > + data = 0x0; > + break; > + case 75: > + data = 0x1; > + break; > + case 90: > + data = 0x2; > + break; > + case 105: > + 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); > +} > + > +/* > + * Sets charger registers to proper and safe default values. > + */ > +static int pf1550_reg_init(struct pf1550_charger *chg) > +{ > + struct device *dev = chg->dev; > + int ret; > + unsigned int data; > + > + /* Unmask charger interrupt, mask DPMI and reserved bit */ > + 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 = regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_VBUS_SNS, > + &data); > + if (ret) > + return dev_err_probe(dev, ret, "Read charg vbus_sns error\n"); > + > + if (data & PF1550_VBUS_VALID) > + chg->psy_desc.type = POWER_SUPPLY_TYPE_MAINS; > + > + 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; > + > + /* Turn on charger */ > + ret = regmap_write(chg->pf1550->regmap, PF1550_CHARG_REG_CHG_OPER, > + PF1550_CHG_TURNON); > + 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 device *dev = chg->dev; > + struct power_supply_battery_info *info; > + > + 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_dev *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); > + > + INIT_DELAYED_WORK(&chg->vbus_sense_work, pf1550_chg_vbus_work); > + INIT_DELAYED_WORK(&chg->chg_sense_work, pf1550_chg_chg_work); > + INIT_DELAYED_WORK(&chg->bat_sense_work, pf1550_chg_bat_work); > + > + for (i = 0; i < PF1550_CHARGER_IRQ_NR; i++) { > + irq = platform_get_irq(pdev, i); > + if (irq < 0) > + return 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"); > + } > + > + psy_cfg.drv_data = chg; > + > + chg->psy_desc.name = PF1550_CHARGER_NAME; > + chg->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY; > + chg->psy_desc.get_property = pf1550_charger_get_property; > + chg->psy_desc.properties = pf1550_charger_props; > + chg->psy_desc.num_properties = ARRAY_SIZE(pf1550_charger_props); > + > + chg->charger = devm_power_supply_register(&pdev->dev, &chg->psy_desc, > + &psy_cfg); > + if (IS_ERR(chg->charger)) > + return dev_err_probe(&pdev->dev, PTR_ERR(chg->charger), > + "failed: power supply register\n"); > + > + pf1550_dt_parse_dev_info(chg); > + > + return pf1550_reg_init(chg); > +} > + > +static void pf1550_charger_remove(struct platform_device *pdev) > +{ > + struct pf1550_charger *chg = platform_get_drvdata(pdev); > + > + cancel_delayed_work_sync(&chg->bat_sense_work); > + cancel_delayed_work_sync(&chg->chg_sense_work); > + cancel_delayed_work_sync(&chg->vbus_sense_work); > +} > + > +static const struct platform_device_id pf1550_charger_id[] = { > + { "pf1550-charger", 0 }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(platform, pf1550_charger_id); > + > +static struct platform_driver pf1550_charger_driver = { > + .driver = { > + .name = "pf1550-charger", > + }, > + .probe = pf1550_charger_probe, > + .remove = pf1550_charger_remove, > + .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"); > > -- > 2.49.0 > >
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 79ddb006e2dad6bf96b71ed570a37c006b5f9433..6d0c872edac1f45da314632e671af1aeda4c87b8 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -471,6 +471,17 @@ config CHARGER_88PM860X help Say Y here to enable charger for Marvell 88PM860x chip. +config CHARGER_PF1550 + tristate "NXP PF1550 battery charger driver" + depends on MFD_PF1550 + help + Say Y to enable support for the NXP PF1550 battery charger. + The device is a single cell Li-Ion/Li-Polymer battery charger for + portable application. + + This driver can also be built as a module. If so, the module will be + called pf1550-charger. + config BATTERY_RX51 tristate "Nokia RX-51 (N900) battery driver" depends on TWL4030_MADC diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 4f5f8e3507f80da02812f0d08c2d81ddff0a272f..7f68380099c59dab71b73120150612a23e16a745 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -64,6 +64,7 @@ obj-$(CONFIG_CHARGER_RT9467) += rt9467-charger.o obj-$(CONFIG_CHARGER_RT9471) += rt9471.o obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o +obj-$(CONFIG_CHARGER_PF1550) += pf1550-charger.o obj-$(CONFIG_BATTERY_RX51) += rx51_battery.o obj-$(CONFIG_AB8500_BM) += ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o ab8500_chargalg.o obj-$(CONFIG_CHARGER_CPCAP) += cpcap-charger.o diff --git a/drivers/power/supply/pf1550-charger.c b/drivers/power/supply/pf1550-charger.c new file mode 100644 index 0000000000000000000000000000000000000000..3b4cdf4cab9659005f86ffb32e8457c7cb3065f9 --- /dev/null +++ b/drivers/power/supply/pf1550-charger.c @@ -0,0 +1,633 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// pf1550_charger.c - charger driver for the PF1550 +// +// Copyright (C) 2016 Freescale Semiconductor, Inc. +// Robin Gong <yibin.gong@freescale.com> +// +// Portions Copyright (c) 2025 Savoir-faire Linux Inc. +// Samuel Kayode <samuel.kayode@savoirfairelinux.com> +// + +#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_CHARGER_NAME "pf1550-charger" +#define PF1550_DEFAULT_CONSTANT_VOLT 4200000 +#define PF1550_DEFAULT_MIN_SYSTEM_VOLT 3500000 +#define PF1550_DEFAULT_THERMAL_TEMP 75 +#define PF1550_CHARGER_IRQ_NR 5 + +static const char *pf1550_charger_model = "PF1550"; +static const char *pf1550_charger_manufacturer = "NXP"; + +struct pf1550_charger { + struct device *dev; + const struct pf1550_dev *pf1550; + struct power_supply *charger; + struct power_supply_desc psy_desc; + struct delayed_work vbus_sense_work; + struct delayed_work chg_sense_work; + struct delayed_work bat_sense_work; + + u32 constant_volt; + u32 min_system_volt; + u32 thermal_regulation_temp; +}; + +static int pf1550_get_charger_state(struct regmap *regmap, int *val) +{ + int ret; + unsigned int data; + + 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: + *val = POWER_SUPPLY_STATUS_CHARGING; + break; + case PF1550_CHG_CONSTANT_VOL: + *val = POWER_SUPPLY_STATUS_CHARGING; + break; + 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) +{ + int ret; + unsigned int data; + + 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; +} + +/* + * Supported health statuses: + * - POWER_SUPPLY_HEALTH_DEAD + * - POWER_SUPPLY_HEALTH_GOOD + * - POWER_SUPPLY_HEALTH_OVERVOLTAGE + * - POWER_SUPPLY_HEALTH_UNKNOWN + */ +static int pf1550_get_battery_health(struct regmap *regmap, int *val) +{ + int ret; + unsigned int data; + + 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_DEAD; + 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 (!chg->charger) + return; + + 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 (!chg->charger) + return; + + 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_info(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; + bool psy_changed = false; + + if (!chg->charger) + return; + + 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) { + chg->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY; + psy_changed = true; + dev_dbg(chg->dev, "VBUS detached.\n"); + } + 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) { + chg->psy_desc.type = POWER_SUPPLY_TYPE_MAINS; + psy_changed = true; + dev_dbg(chg->dev, "VBUS attached.\n"); + } + + if (psy_changed) + 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; + struct platform_device *pdev = to_platform_device(dev); + int i, irq_type = -1; + + for (i = 0; i < PF1550_CHARGER_IRQ_NR; i++) + if (irq == platform_get_irq(pdev, 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_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_ONLINE, + 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_charger_model; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = pf1550_charger_manufacturer; + break; + default: + return -EINVAL; + } + + return ret; +} + +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 60: + data = 0x0; + break; + case 75: + data = 0x1; + break; + case 90: + data = 0x2; + break; + case 105: + 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); +} + +/* + * Sets charger registers to proper and safe default values. + */ +static int pf1550_reg_init(struct pf1550_charger *chg) +{ + struct device *dev = chg->dev; + int ret; + unsigned int data; + + /* Unmask charger interrupt, mask DPMI and reserved bit */ + 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 = regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_VBUS_SNS, + &data); + if (ret) + return dev_err_probe(dev, ret, "Read charg vbus_sns error\n"); + + if (data & PF1550_VBUS_VALID) + chg->psy_desc.type = POWER_SUPPLY_TYPE_MAINS; + + 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; + + /* Turn on charger */ + ret = regmap_write(chg->pf1550->regmap, PF1550_CHARG_REG_CHG_OPER, + PF1550_CHG_TURNON); + 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 device *dev = chg->dev; + struct power_supply_battery_info *info; + + 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_dev *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); + + INIT_DELAYED_WORK(&chg->vbus_sense_work, pf1550_chg_vbus_work); + INIT_DELAYED_WORK(&chg->chg_sense_work, pf1550_chg_chg_work); + INIT_DELAYED_WORK(&chg->bat_sense_work, pf1550_chg_bat_work); + + for (i = 0; i < PF1550_CHARGER_IRQ_NR; i++) { + irq = platform_get_irq(pdev, i); + if (irq < 0) + return 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"); + } + + psy_cfg.drv_data = chg; + + chg->psy_desc.name = PF1550_CHARGER_NAME; + chg->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY; + chg->psy_desc.get_property = pf1550_charger_get_property; + chg->psy_desc.properties = pf1550_charger_props; + chg->psy_desc.num_properties = ARRAY_SIZE(pf1550_charger_props); + + chg->charger = devm_power_supply_register(&pdev->dev, &chg->psy_desc, + &psy_cfg); + if (IS_ERR(chg->charger)) + return dev_err_probe(&pdev->dev, PTR_ERR(chg->charger), + "failed: power supply register\n"); + + pf1550_dt_parse_dev_info(chg); + + return pf1550_reg_init(chg); +} + +static void pf1550_charger_remove(struct platform_device *pdev) +{ + struct pf1550_charger *chg = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&chg->bat_sense_work); + cancel_delayed_work_sync(&chg->chg_sense_work); + cancel_delayed_work_sync(&chg->vbus_sense_work); +} + +static const struct platform_device_id pf1550_charger_id[] = { + { "pf1550-charger", 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, pf1550_charger_id); + +static struct platform_driver pf1550_charger_driver = { + .driver = { + .name = "pf1550-charger", + }, + .probe = pf1550_charger_probe, + .remove = pf1550_charger_remove, + .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");