/* * axp288_charger.c - X-power AXP288 PMIC Charger driver * * Copyright (C) 2014 Intel Corporation * Author: Ramakrishna Pallala * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define PS_STAT_VBUS_TRIGGER (1 << 0) #define PS_STAT_BAT_CHRG_DIR (1 << 2) #define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3) #define PS_STAT_VBUS_VALID (1 << 4) #define PS_STAT_VBUS_PRESENT (1 << 5) #define CHRG_STAT_BAT_SAFE_MODE (1 << 3) #define CHRG_STAT_BAT_VALID (1 << 4) #define CHRG_STAT_BAT_PRESENT (1 << 5) #define CHRG_STAT_CHARGING (1 << 6) #define CHRG_STAT_PMIC_OTP (1 << 7) #define VBUS_ISPOUT_CUR_LIM_MASK 0x03 #define VBUS_ISPOUT_CUR_LIM_BIT_POS 0 #define VBUS_ISPOUT_CUR_LIM_900MA 0x0 /* 900mA */ #define VBUS_ISPOUT_CUR_LIM_1500MA 0x1 /* 1500mA */ #define VBUS_ISPOUT_CUR_LIM_2000MA 0x2 /* 2000mA */ #define VBUS_ISPOUT_CUR_NO_LIM 0x3 /* 2500mA */ #define VBUS_ISPOUT_VHOLD_SET_MASK 0x31 #define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3 #define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000 /* 4000mV */ #define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100 /* 100mV */ #define VBUS_ISPOUT_VHOLD_SET_4300MV 0x3 /* 4300mV */ #define VBUS_ISPOUT_VBUS_PATH_DIS (1 << 7) #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */ #define CHRG_CCCV_CC_BIT_POS 0 #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */ #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */ #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */ #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */ #define CHRG_CCCV_CV_BIT_POS 5 #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */ #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */ #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */ #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */ #define CHRG_CCCV_CHG_EN (1 << 7) #define CNTL2_CC_TIMEOUT_MASK 0x3 /* 2 bits */ #define CNTL2_CC_TIMEOUT_OFFSET 6 /* 6 Hrs */ #define CNTL2_CC_TIMEOUT_LSB_RES 2 /* 2 Hrs */ #define CNTL2_CC_TIMEOUT_12HRS 0x3 /* 12 Hrs */ #define CNTL2_CHGLED_TYPEB (1 << 4) #define CNTL2_CHG_OUT_TURNON (1 << 5) #define CNTL2_PC_TIMEOUT_MASK 0xC0 #define CNTL2_PC_TIMEOUT_OFFSET 40 /* 40 mins */ #define CNTL2_PC_TIMEOUT_LSB_RES 10 /* 10 mins */ #define CNTL2_PC_TIMEOUT_70MINS 0x3 #define CHRG_ILIM_TEMP_LOOP_EN (1 << 3) #define CHRG_VBUS_ILIM_MASK 0xf0 #define CHRG_VBUS_ILIM_BIT_POS 4 #define CHRG_VBUS_ILIM_100MA 0x0 /* 100mA */ #define CHRG_VBUS_ILIM_500MA 0x1 /* 500mA */ #define CHRG_VBUS_ILIM_900MA 0x2 /* 900mA */ #define CHRG_VBUS_ILIM_1500MA 0x3 /* 1500mA */ #define CHRG_VBUS_ILIM_2000MA 0x4 /* 2000mA */ #define CHRG_VBUS_ILIM_2500MA 0x5 /* 2500mA */ #define CHRG_VBUS_ILIM_3000MA 0x6 /* 3000mA */ #define CHRG_VLTFC_0C 0xA5 /* 0 DegC */ #define CHRG_VHTFC_45C 0x1F /* 45 DegC */ #define BAT_IRQ_CFG_CHRG_DONE (1 << 2) #define BAT_IRQ_CFG_CHRG_START (1 << 3) #define BAT_IRQ_CFG_BAT_SAFE_EXIT (1 << 4) #define BAT_IRQ_CFG_BAT_SAFE_ENTER (1 << 5) #define BAT_IRQ_CFG_BAT_DISCON (1 << 6) #define BAT_IRQ_CFG_BAT_CONN (1 << 7) #define BAT_IRQ_CFG_BAT_MASK 0xFC #define TEMP_IRQ_CFG_QCBTU (1 << 4) #define TEMP_IRQ_CFG_CBTU (1 << 5) #define TEMP_IRQ_CFG_QCBTO (1 << 6) #define TEMP_IRQ_CFG_CBTO (1 << 7) #define TEMP_IRQ_CFG_MASK 0xF0 #define FG_CNTL_OCV_ADJ_EN (1 << 3) #define CV_4100MV 4100 /* 4100mV */ #define CV_4150MV 4150 /* 4150mV */ #define CV_4200MV 4200 /* 4200mV */ #define CV_4350MV 4350 /* 4350mV */ #define CC_200MA 200 /* 200mA */ #define CC_600MA 600 /* 600mA */ #define CC_800MA 800 /* 800mA */ #define CC_1000MA 1000 /* 1000mA */ #define CC_1600MA 1600 /* 1600mA */ #define CC_2000MA 2000 /* 2000mA */ #define ILIM_100MA 100 /* 100mA */ #define ILIM_500MA 500 /* 500mA */ #define ILIM_900MA 900 /* 900mA */ #define ILIM_1500MA 1500 /* 1500mA */ #define ILIM_2000MA 2000 /* 2000mA */ #define ILIM_2500MA 2500 /* 2500mA */ #define ILIM_3000MA 3000 /* 3000mA */ #define AXP288_EXTCON_DEV_NAME "axp288_extcon" #define AXP288_EXTCON_SLOW_CHARGER "SLOW-CHARGER" #define AXP288_EXTCON_DOWNSTREAM_CHARGER "CHARGE-DOWNSTREAM" #define AXP288_EXTCON_FAST_CHARGER "FAST-CHARGER" enum { VBUS_OV_IRQ = 0, CHARGE_DONE_IRQ, CHARGE_CHARGING_IRQ, BAT_SAFE_QUIT_IRQ, BAT_SAFE_ENTER_IRQ, QCBTU_IRQ, CBTU_IRQ, QCBTO_IRQ, CBTO_IRQ, CHRG_INTR_END, }; struct axp288_chrg_info { struct platform_device *pdev; struct axp20x_chrg_pdata *pdata; struct regmap *regmap; struct regmap_irq_chip_data *regmap_irqc; int irq[CHRG_INTR_END]; struct power_supply *psy_usb; struct mutex lock; /* OTG/Host mode */ struct { struct work_struct work; struct extcon_specific_cable_nb cable; struct notifier_block id_nb; bool id_short; } otg; /* SDP/CDP/DCP USB charging cable notifications */ struct { struct extcon_dev *edev; bool connected; enum power_supply_type chg_type; struct notifier_block nb; struct work_struct work; } cable; int health; int inlmt; int cc; int cv; int max_cc; int max_cv; bool online; bool present; bool enable_charger; bool is_charger_enabled; }; static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc) { u8 reg_val; int ret; if (cc < CHRG_CCCV_CC_OFFSET) cc = CHRG_CCCV_CC_OFFSET; else if (cc > info->max_cc) cc = info->max_cc; reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES; cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET; reg_val = reg_val << CHRG_CCCV_CC_BIT_POS; ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, CHRG_CCCV_CC_MASK, reg_val); if (ret >= 0) info->cc = cc; return ret; } static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv) { u8 reg_val; int ret; if (cv <= CV_4100MV) { reg_val = CHRG_CCCV_CV_4100MV; cv = CV_4100MV; } else if (cv <= CV_4150MV) { reg_val = CHRG_CCCV_CV_4150MV; cv = CV_4150MV; } else if (cv <= CV_4200MV) { reg_val = CHRG_CCCV_CV_4200MV; cv = CV_4200MV; } else { reg_val = CHRG_CCCV_CV_4350MV; cv = CV_4350MV; } reg_val = reg_val << CHRG_CCCV_CV_BIT_POS; ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, CHRG_CCCV_CV_MASK, reg_val); if (ret >= 0) info->cv = cv; return ret; } static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info, int inlmt) { int ret; unsigned int val; u8 reg_val; /* Read in limit register */ ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val); if (ret < 0) goto set_inlmt_fail; if (inlmt <= ILIM_100MA) { reg_val = CHRG_VBUS_ILIM_100MA; inlmt = ILIM_100MA; } else if (inlmt <= ILIM_500MA) { reg_val = CHRG_VBUS_ILIM_500MA; inlmt = ILIM_500MA; } else if (inlmt <= ILIM_900MA) { reg_val = CHRG_VBUS_ILIM_900MA; inlmt = ILIM_900MA; } else if (inlmt <= ILIM_1500MA) { reg_val = CHRG_VBUS_ILIM_1500MA; inlmt = ILIM_1500MA; } else if (inlmt <= ILIM_2000MA) { reg_val = CHRG_VBUS_ILIM_2000MA; inlmt = ILIM_2000MA; } else if (inlmt <= ILIM_2500MA) { reg_val = CHRG_VBUS_ILIM_2500MA; inlmt = ILIM_2500MA; } else { reg_val = CHRG_VBUS_ILIM_3000MA; inlmt = ILIM_3000MA; } reg_val = (val & ~CHRG_VBUS_ILIM_MASK) | (reg_val << CHRG_VBUS_ILIM_BIT_POS); ret = regmap_write(info->regmap, AXP20X_CHRG_BAK_CTRL, reg_val); if (ret >= 0) info->inlmt = inlmt; else dev_err(&info->pdev->dev, "charger BAK control %d\n", ret); set_inlmt_fail: return ret; } static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info, bool enable) { int ret; if (enable) ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT, VBUS_ISPOUT_VBUS_PATH_DIS, 0); else ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT, VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS); if (ret < 0) dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret); return ret; } static int axp288_charger_enable_charger(struct axp288_chrg_info *info, bool enable) { int ret; if (enable) ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN); else ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, CHRG_CCCV_CHG_EN, 0); if (ret < 0) dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret); else info->is_charger_enabled = enable; return ret; } static int axp288_charger_is_present(struct axp288_chrg_info *info) { int ret, present = 0; unsigned int val; ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); if (ret < 0) return ret; if (val & PS_STAT_VBUS_PRESENT) present = 1; return present; } static int axp288_charger_is_online(struct axp288_chrg_info *info) { int ret, online = 0; unsigned int val; ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); if (ret < 0) return ret; if (val & PS_STAT_VBUS_VALID) online = 1; return online; } static int axp288_get_charger_health(struct axp288_chrg_info *info) { int ret, pwr_stat, chrg_stat; int health = POWER_SUPPLY_HEALTH_UNKNOWN; unsigned int val; ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); if ((ret < 0) || !(val & PS_STAT_VBUS_PRESENT)) goto health_read_fail; else pwr_stat = val; ret = regmap_read(info->regmap, AXP20X_PWR_OP_MODE, &val); if (ret < 0) goto health_read_fail; else chrg_stat = val; if (!(pwr_stat & PS_STAT_VBUS_VALID)) health = POWER_SUPPLY_HEALTH_DEAD; else if (chrg_stat & CHRG_STAT_PMIC_OTP) health = POWER_SUPPLY_HEALTH_OVERHEAT; else if (chrg_stat & CHRG_STAT_BAT_SAFE_MODE) health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; else health = POWER_SUPPLY_HEALTH_GOOD; health_read_fail: return health; } static int axp288_charger_usb_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { struct axp288_chrg_info *info = power_supply_get_drvdata(psy); int ret = 0; int scaled_val; mutex_lock(&info->lock); switch (psp) { case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: scaled_val = min(val->intval, info->max_cc); scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000); ret = axp288_charger_set_cc(info, scaled_val); if (ret < 0) dev_warn(&info->pdev->dev, "set charge current failed\n"); break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: scaled_val = min(val->intval, info->max_cv); scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000); ret = axp288_charger_set_cv(info, scaled_val); if (ret < 0) dev_warn(&info->pdev->dev, "set charge voltage failed\n"); break; default: ret = -EINVAL; } mutex_unlock(&info->lock); return ret; } static int axp288_charger_usb_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct axp288_chrg_info *info = power_supply_get_drvdata(psy); int ret = 0; mutex_lock(&info->lock); switch (psp) { case POWER_SUPPLY_PROP_PRESENT: /* Check for OTG case first */ if (info->otg.id_short) { val->intval = 0; break; } ret = axp288_charger_is_present(info); if (ret < 0) goto psy_get_prop_fail; info->present = ret; val->intval = info->present; break; case POWER_SUPPLY_PROP_ONLINE: /* Check for OTG case first */ if (info->otg.id_short) { val->intval = 0; break; } ret = axp288_charger_is_online(info); if (ret < 0) goto psy_get_prop_fail; info->online = ret; val->intval = info->online; break; case POWER_SUPPLY_PROP_HEALTH: val->intval = axp288_get_charger_health(info); break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: val->intval = info->cc * 1000; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: val->intval = info->max_cc * 1000; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: val->intval = info->cv * 1000; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: val->intval = info->max_cv * 1000; break; case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: val->intval = info->inlmt * 1000; break; default: ret = -EINVAL; goto psy_get_prop_fail; } psy_get_prop_fail: mutex_unlock(&info->lock); return ret; } static int axp288_charger_property_is_writeable(struct power_supply *psy, enum power_supply_property psp) { int ret; switch (psp) { case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: ret = 1; break; default: ret = 0; } return ret; } static enum power_supply_property axp288_usb_props[] = { POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_TYPE, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, }; static const struct power_supply_desc axp288_charger_desc = { .name = "axp288_charger", .type = POWER_SUPPLY_TYPE_USB, .properties = axp288_usb_props, .num_properties = ARRAY_SIZE(axp288_usb_props), .get_property = axp288_charger_usb_get_property, .set_property = axp288_charger_usb_set_property, .property_is_writeable = axp288_charger_property_is_writeable, }; static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev) { struct axp288_chrg_info *info = dev; int i; for (i = 0; i < CHRG_INTR_END; i++) { if (info->irq[i] == irq) break; } if (i >= CHRG_INTR_END) { dev_warn(&info->pdev->dev, "spurious interrupt!!\n"); return IRQ_NONE; } switch (i) { case VBUS_OV_IRQ: dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n"); break; case CHARGE_DONE_IRQ: dev_dbg(&info->pdev->dev, "Charging Done INTR\n"); break; case CHARGE_CHARGING_IRQ: dev_dbg(&info->pdev->dev, "Start Charging IRQ\n"); break; case BAT_SAFE_QUIT_IRQ: dev_dbg(&info->pdev->dev, "Quit Safe Mode(restart timer) Charging IRQ\n"); break; case BAT_SAFE_ENTER_IRQ: dev_dbg(&info->pdev->dev, "Enter Safe Mode(timer expire) Charging IRQ\n"); break; case QCBTU_IRQ: dev_dbg(&info->pdev->dev, "Quit Battery Under Temperature(CHRG) INTR\n"); break; case CBTU_IRQ: dev_dbg(&info->pdev->dev, "Hit Battery Under Temperature(CHRG) INTR\n"); break; case QCBTO_IRQ: dev_dbg(&info->pdev->dev, "Quit Battery Over Temperature(CHRG) INTR\n"); break; case CBTO_IRQ: dev_dbg(&info->pdev->dev, "Hit Battery Over Temperature(CHRG) INTR\n"); break; default: dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n"); goto out; } power_supply_changed(info->psy_usb); out: return IRQ_HANDLED; } static void axp288_charger_extcon_evt_worker(struct work_struct *work) { struct axp288_chrg_info *info = container_of(work, struct axp288_chrg_info, cable.work); int ret, current_limit; bool changed = false; struct extcon_dev *edev = info->cable.edev; bool old_connected = info->cable.connected; /* Determine cable/charger type */ if (extcon_get_cable_state(edev, AXP288_EXTCON_SLOW_CHARGER) > 0) { dev_dbg(&info->pdev->dev, "USB SDP charger is connected"); info->cable.connected = true; info->cable.chg_type = POWER_SUPPLY_TYPE_USB; } else if (extcon_get_cable_state(edev, AXP288_EXTCON_DOWNSTREAM_CHARGER) > 0) { dev_dbg(&info->pdev->dev, "USB CDP charger is connected"); info->cable.connected = true; info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP; } else if (extcon_get_cable_state(edev, AXP288_EXTCON_FAST_CHARGER) > 0) { dev_dbg(&info->pdev->dev, "USB DCP charger is connected"); info->cable.connected = true; info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP; } else { if (old_connected) dev_dbg(&info->pdev->dev, "USB charger disconnected"); info->cable.connected = false; info->cable.chg_type = POWER_SUPPLY_TYPE_USB; } /* Cable status changed */ if (old_connected != info->cable.connected) changed = true; if (!changed) return; mutex_lock(&info->lock); if (info->is_charger_enabled && !info->cable.connected) { info->enable_charger = false; ret = axp288_charger_enable_charger(info, info->enable_charger); if (ret < 0) dev_err(&info->pdev->dev, "cannot disable charger (%d)", ret); } else if (!info->is_charger_enabled && info->cable.connected) { switch (info->cable.chg_type) { case POWER_SUPPLY_TYPE_USB: current_limit = ILIM_500MA; break; case POWER_SUPPLY_TYPE_USB_CDP: current_limit = ILIM_1500MA; break; case POWER_SUPPLY_TYPE_USB_DCP: current_limit = ILIM_2000MA; break; default: /* Unknown */ current_limit = 0; break; } /* Set vbus current limit first, then enable charger */ ret = axp288_charger_set_vbus_inlmt(info, current_limit); if (ret < 0) { dev_err(&info->pdev->dev, "error setting current limit (%d)", ret); } else { info->enable_charger = (current_limit > 0); ret = axp288_charger_enable_charger(info, info->enable_charger); if (ret < 0) dev_err(&info->pdev->dev, "cannot enable charger (%d)", ret); } } if (changed) info->health = axp288_get_charger_health(info); mutex_unlock(&info->lock); if (changed) power_supply_changed(info->psy_usb); } static int axp288_charger_handle_cable_evt(struct notifier_block *nb, unsigned long event, void *param) { struct axp288_chrg_info *info = container_of(nb, struct axp288_chrg_info, cable.nb); schedule_work(&info->cable.work); return NOTIFY_OK; } static void axp288_charger_otg_evt_worker(struct work_struct *work) { struct axp288_chrg_info *info = container_of(work, struct axp288_chrg_info, otg.work); int ret; /* Disable VBUS path before enabling the 5V boost */ ret = axp288_charger_vbus_path_select(info, !info->otg.id_short); if (ret < 0) dev_warn(&info->pdev->dev, "vbus path disable failed\n"); } static int axp288_charger_handle_otg_evt(struct notifier_block *nb, unsigned long event, void *param) { struct axp288_chrg_info *info = container_of(nb, struct axp288_chrg_info, otg.id_nb); struct extcon_dev *edev = param; int usb_host = extcon_get_cable_state(edev, "USB-Host"); dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n", usb_host ? "attached" : "detached"); /* * Set usb_id_short flag to avoid running charger detection logic * in case usb host. */ info->otg.id_short = usb_host; schedule_work(&info->otg.work); return NOTIFY_OK; } static void charger_init_hw_regs(struct axp288_chrg_info *info) { int ret, cc, cv; unsigned int val; /* Program temperature thresholds */ ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C); if (ret < 0) dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_V_LTF_CHRG, ret); ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C); if (ret < 0) dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_V_HTF_CHRG, ret); /* Do not turn-off charger o/p after charge cycle ends */ ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL2, CNTL2_CHG_OUT_TURNON, 1); if (ret < 0) dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_CHRG_CTRL2, ret); /* Enable interrupts */ ret = regmap_update_bits(info->regmap, AXP20X_IRQ2_EN, BAT_IRQ_CFG_BAT_MASK, 1); if (ret < 0) dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_IRQ2_EN, ret); ret = regmap_update_bits(info->regmap, AXP20X_IRQ3_EN, TEMP_IRQ_CFG_MASK, 1); if (ret < 0) dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_IRQ3_EN, ret); /* Setup ending condition for charging to be 10% of I(chrg) */ ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1, CHRG_CCCV_ITERM_20P, 0); if (ret < 0) dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_CHRG_CTRL1, ret); /* Disable OCV-SOC curve calibration */ ret = regmap_update_bits(info->regmap, AXP20X_CC_CTRL, FG_CNTL_OCV_ADJ_EN, 0); if (ret < 0) dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_CC_CTRL, ret); /* Init charging current and voltage */ info->max_cc = info->pdata->max_cc; info->max_cv = info->pdata->max_cv; /* Read current charge voltage and current limit */ ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val); if (ret < 0) { /* Assume default if cannot read */ info->cc = info->pdata->def_cc; info->cv = info->pdata->def_cv; } else { /* Determine charge voltage */ cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS; switch (cv) { case CHRG_CCCV_CV_4100MV: info->cv = CV_4100MV; break; case CHRG_CCCV_CV_4150MV: info->cv = CV_4150MV; break; case CHRG_CCCV_CV_4200MV: info->cv = CV_4200MV; break; case CHRG_CCCV_CV_4350MV: info->cv = CV_4350MV; break; default: info->cv = INT_MAX; break; } /* Determine charge current limit */ cc = (ret & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS; cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET; info->cc = cc; /* Program default charging voltage and current */ cc = min(info->pdata->def_cc, info->max_cc); cv = min(info->pdata->def_cv, info->max_cv); ret = axp288_charger_set_cc(info, cc); if (ret < 0) dev_warn(&info->pdev->dev, "error(%d) in setting CC\n", ret); ret = axp288_charger_set_cv(info, cv); if (ret < 0) dev_warn(&info->pdev->dev, "error(%d) in setting CV\n", ret); } } static int axp288_charger_probe(struct platform_device *pdev) { int ret, i, pirq; struct axp288_chrg_info *info; struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); struct power_supply_config charger_cfg = {}; info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; info->pdev = pdev; info->regmap = axp20x->regmap; info->regmap_irqc = axp20x->regmap_irqc; info->pdata = pdev->dev.platform_data; if (!info->pdata) { /* Try ACPI provided pdata via device properties */ if (!device_property_present(&pdev->dev, "axp288_charger_data\n")) dev_err(&pdev->dev, "failed to get platform data\n"); return -ENODEV; } info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME); if (info->cable.edev == NULL) { dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n", AXP288_EXTCON_DEV_NAME); return -EPROBE_DEFER; } /* Register for extcon notification */ INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker); info->cable.nb.notifier_call = axp288_charger_handle_cable_evt; ret = extcon_register_notifier(info->cable.edev, &info->cable.nb); if (ret) { dev_err(&info->pdev->dev, "failed to register extcon notifier %d\n", ret); return ret; } platform_set_drvdata(pdev, info); mutex_init(&info->lock); /* Register with power supply class */ charger_cfg.drv_data = info; info->psy_usb = power_supply_register(&pdev->dev, &axp288_charger_desc, &charger_cfg); if (IS_ERR(info->psy_usb)) { dev_err(&pdev->dev, "failed to register power supply charger\n"); ret = PTR_ERR(info->psy_usb); goto psy_reg_failed; } /* Register for OTG notification */ INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker); info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt; ret = extcon_register_interest(&info->otg.cable, NULL, "USB-Host", &info->otg.id_nb); if (ret) dev_warn(&pdev->dev, "failed to register otg notifier\n"); if (info->otg.cable.edev) info->otg.id_short = extcon_get_cable_state( info->otg.cable.edev, "USB-Host"); /* Register charger interrupts */ for (i = 0; i < CHRG_INTR_END; i++) { pirq = platform_get_irq(info->pdev, i); info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq); if (info->irq[i] < 0) { dev_warn(&info->pdev->dev, "failed to get virtual interrupt=%d\n", pirq); ret = info->irq[i]; goto intr_reg_failed; } ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i], NULL, axp288_charger_irq_thread_handler, IRQF_ONESHOT, info->pdev->name, info); if (ret) { dev_err(&pdev->dev, "failed to request interrupt=%d\n", info->irq[i]); goto intr_reg_failed; } } charger_init_hw_regs(info); return 0; intr_reg_failed: if (info->otg.cable.edev) extcon_unregister_interest(&info->otg.cable); power_supply_unregister(info->psy_usb); psy_reg_failed: extcon_unregister_notifier(info->cable.edev, &info->cable.nb); return ret; } static int axp288_charger_remove(struct platform_device *pdev) { struct axp288_chrg_info *info = dev_get_drvdata(&pdev->dev); if (info->otg.cable.edev) extcon_unregister_interest(&info->otg.cable); extcon_unregister_notifier(info->cable.edev, &info->cable.nb); power_supply_unregister(info->psy_usb); return 0; } static struct platform_driver axp288_charger_driver = { .probe = axp288_charger_probe, .remove = axp288_charger_remove, .driver = { .name = "axp288_charger", }, }; module_platform_driver(axp288_charger_driver); MODULE_AUTHOR("Ramakrishna Pallala "); MODULE_DESCRIPTION("X-power AXP288 Charger Driver"); MODULE_LICENSE("GPL v2");