| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ramakrishna Pallala | 2811 | 68.24% | 1 | 2.27% |
| Hans de Goede | 807 | 19.59% | 33 | 75.00% |
| Kate Hsuan | 359 | 8.72% | 1 | 2.27% |
| Chanwoo Choi | 53 | 1.29% | 2 | 4.55% |
| Dan Carpenter | 46 | 1.12% | 1 | 2.27% |
| Olliver Schinagl | 20 | 0.49% | 1 | 2.27% |
| Carlo Caione | 10 | 0.24% | 1 | 2.27% |
| Gustavo A. R. Silva | 9 | 0.22% | 1 | 2.27% |
| Thomas Gleixner | 2 | 0.05% | 1 | 2.27% |
| Stephen Rothwell | 1 | 0.02% | 1 | 2.27% |
| Wei Yongjun | 1 | 0.02% | 1 | 2.27% |
| Total | 4119 | 44 |
// SPDX-License-Identifier: GPL-2.0-only /* * axp288_charger.c - X-power AXP288 PMIC Charger driver * * Copyright (C) 2016-2017 Hans de Goede <hdegoede@redhat.com> * Copyright (C) 2014 Intel Corporation * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com> */ #include <linux/acpi.h> #include <linux/bitops.h> #include <linux/module.h> #include <linux/device.h> #include <linux/regmap.h> #include <linux/workqueue.h> #include <linux/delay.h> #include <linux/platform_device.h> #include <linux/usb/otg.h> #include <linux/notifier.h> #include <linux/power_supply.h> #include <linux/property.h> #include <linux/mfd/axp20x.h> #include <linux/extcon.h> #include <linux/dmi.h> #include <asm/iosf_mbi.h> #define PS_STAT_VBUS_TRIGGER BIT(0) #define PS_STAT_BAT_CHRG_DIR BIT(2) #define PS_STAT_VBAT_ABOVE_VHOLD BIT(3) #define PS_STAT_VBUS_VALID BIT(4) #define PS_STAT_VBUS_PRESENT BIT(5) #define CHRG_STAT_BAT_SAFE_MODE BIT(3) #define CHRG_STAT_BAT_VALID BIT(4) #define CHRG_STAT_BAT_PRESENT BIT(5) #define CHRG_STAT_CHARGING BIT(6) #define CHRG_STAT_PMIC_OTP BIT(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 0x38 #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_4400MV 0x4 /* 4400mV */ #define VBUS_ISPOUT_VBUS_PATH_DIS BIT(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 BIT(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 BIT(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 BIT(4) #define CNTL2_CHG_OUT_TURNON BIT(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 BIT(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_VBUS_ILIM_3500MA 0x7 /* 3500mA */ #define CHRG_VBUS_ILIM_4000MA 0x8 /* 4000mA */ #define CHRG_VLTFC_0C 0xA5 /* 0 DegC */ #define CHRG_VHTFC_45C 0x1F /* 45 DegC */ #define FG_CNTL_OCV_ADJ_EN BIT(3) #define CV_4100MV 4100 /* 4100mV */ #define CV_4150MV 4150 /* 4150mV */ #define CV_4200MV 4200 /* 4200mV */ #define CV_4350MV 4350 /* 4350mV */ #define AXP288_REG_UPDATE_INTERVAL (60 * HZ) #define AXP288_EXTCON_DEV_NAME "axp288_extcon" #define USB_HOST_EXTCON_HID "INT3496" #define USB_HOST_EXTCON_NAME "INT3496:00" 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 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_dev *cable; struct notifier_block id_nb; bool id_short; } otg; /* SDP/CDP/DCP USB charging cable notifications */ struct { struct extcon_dev *edev; struct notifier_block nb; struct work_struct work; } cable; int cc; int cv; int max_cc; int max_cv; unsigned long last_updated; unsigned int input_status; unsigned int op_mode; unsigned int backend_control; bool valid; }; 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_4350MV) { reg_val = CHRG_CCCV_CV_4350MV; cv = CV_4350MV; } else if (cv >= CV_4200MV) { reg_val = CHRG_CCCV_CV_4200MV; cv = CV_4200MV; } else if (cv >= CV_4150MV) { reg_val = CHRG_CCCV_CV_4150MV; cv = CV_4150MV; } else { reg_val = CHRG_CCCV_CV_4100MV; cv = CV_4100MV; } 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 int axp288_charger_get_vbus_inlmt(struct axp288_chrg_info *info) { unsigned int val; val = info->backend_control; val >>= CHRG_VBUS_ILIM_BIT_POS; switch (val) { case CHRG_VBUS_ILIM_100MA: return 100000; case CHRG_VBUS_ILIM_500MA: return 500000; case CHRG_VBUS_ILIM_900MA: return 900000; case CHRG_VBUS_ILIM_1500MA: return 1500000; case CHRG_VBUS_ILIM_2000MA: return 2000000; case CHRG_VBUS_ILIM_2500MA: return 2500000; case CHRG_VBUS_ILIM_3000MA: return 3000000; case CHRG_VBUS_ILIM_3500MA: return 3500000; default: /* All b1xxx values map to 4000 mA */ return 4000000; } } static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info, int inlmt) { int ret; u8 reg_val; if (inlmt >= 4000000) reg_val = CHRG_VBUS_ILIM_4000MA << CHRG_VBUS_ILIM_BIT_POS; else if (inlmt >= 3500000) reg_val = CHRG_VBUS_ILIM_3500MA << CHRG_VBUS_ILIM_BIT_POS; else if (inlmt >= 3000000) reg_val = CHRG_VBUS_ILIM_3000MA << CHRG_VBUS_ILIM_BIT_POS; else if (inlmt >= 2500000) reg_val = CHRG_VBUS_ILIM_2500MA << CHRG_VBUS_ILIM_BIT_POS; else if (inlmt >= 2000000) reg_val = CHRG_VBUS_ILIM_2000MA << CHRG_VBUS_ILIM_BIT_POS; else if (inlmt >= 1500000) reg_val = CHRG_VBUS_ILIM_1500MA << CHRG_VBUS_ILIM_BIT_POS; else if (inlmt >= 900000) reg_val = CHRG_VBUS_ILIM_900MA << CHRG_VBUS_ILIM_BIT_POS; else if (inlmt >= 500000) reg_val = CHRG_VBUS_ILIM_500MA << CHRG_VBUS_ILIM_BIT_POS; else reg_val = CHRG_VBUS_ILIM_100MA << CHRG_VBUS_ILIM_BIT_POS; ret = regmap_update_bits(info->regmap, AXP20X_CHRG_BAK_CTRL, CHRG_VBUS_ILIM_MASK, reg_val); if (ret < 0) dev_err(&info->pdev->dev, "charger BAK control %d\n", ret); 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); return ret; } static int axp288_get_charger_health(struct axp288_chrg_info *info) { if (!(info->input_status & PS_STAT_VBUS_PRESENT)) return POWER_SUPPLY_HEALTH_UNKNOWN; if (!(info->input_status & PS_STAT_VBUS_VALID)) return POWER_SUPPLY_HEALTH_DEAD; else if (info->op_mode & CHRG_STAT_PMIC_OTP) return POWER_SUPPLY_HEALTH_OVERHEAT; else if (info->op_mode & CHRG_STAT_BAT_SAFE_MODE) return POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; else return POWER_SUPPLY_HEALTH_GOOD; } 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"); goto out; } break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: scaled_val = DIV_ROUND_CLOSEST(val->intval, 1000); scaled_val = min(scaled_val, info->max_cv); ret = axp288_charger_set_cv(info, scaled_val); if (ret < 0) { dev_warn(&info->pdev->dev, "set charge voltage failed\n"); goto out; } break; case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: ret = axp288_charger_set_vbus_inlmt(info, val->intval); if (ret < 0) { dev_warn(&info->pdev->dev, "set input current limit failed\n"); goto out; } info->valid = false; break; default: ret = -EINVAL; } out: mutex_unlock(&info->lock); return ret; } static int axp288_charger_reg_readb(struct axp288_chrg_info *info, int reg, unsigned int *ret_val) { int ret; ret = regmap_read(info->regmap, reg, ret_val); if (ret < 0) { dev_err(&info->pdev->dev, "Error %d on reading value from register 0x%04x\n", ret, reg); return ret; } return 0; } static int axp288_charger_usb_update_property(struct axp288_chrg_info *info) { int ret = 0; if (info->valid && time_before(jiffies, info->last_updated + AXP288_REG_UPDATE_INTERVAL)) return 0; dev_dbg(&info->pdev->dev, "Charger updating register values...\n"); ret = iosf_mbi_block_punit_i2c_access(); if (ret < 0) return ret; ret = axp288_charger_reg_readb(info, AXP20X_PWR_INPUT_STATUS, &info->input_status); if (ret < 0) goto out; ret = axp288_charger_reg_readb(info, AXP20X_PWR_OP_MODE, &info->op_mode); if (ret < 0) goto out; ret = axp288_charger_reg_readb(info, AXP20X_CHRG_BAK_CTRL, &info->backend_control); if (ret < 0) goto out; info->last_updated = jiffies; info->valid = true; out: iosf_mbi_unblock_punit_i2c_access(); 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; mutex_lock(&info->lock); ret = axp288_charger_usb_update_property(info); if (ret < 0) goto out; switch (psp) { case POWER_SUPPLY_PROP_PRESENT: /* Check for OTG case first */ if (info->otg.id_short) { val->intval = 0; break; } val->intval = (info->input_status & PS_STAT_VBUS_PRESENT) ? 1 : 0; break; case POWER_SUPPLY_PROP_ONLINE: /* Check for OTG case first */ if (info->otg.id_short) { val->intval = 0; break; } val->intval = (info->input_status & PS_STAT_VBUS_VALID) ? 1 : 0; 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_INPUT_CURRENT_LIMIT: val->intval = axp288_charger_get_vbus_inlmt(info); break; default: ret = -EINVAL; } out: 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: case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 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_INPUT_CURRENT_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; } mutex_lock(&info->lock); info->valid = false; mutex_unlock(&info->lock); power_supply_changed(info->psy_usb); out: return IRQ_HANDLED; } /* * The HP Pavilion x2 10 series comes in a number of variants: * Bay Trail SoC + AXP288 PMIC, Micro-USB, DMI_BOARD_NAME: "8021" * Bay Trail SoC + AXP288 PMIC, Type-C, DMI_BOARD_NAME: "815D" * Cherry Trail SoC + AXP288 PMIC, Type-C, DMI_BOARD_NAME: "813E" * Cherry Trail SoC + TI PMIC, Type-C, DMI_BOARD_NAME: "827C" or "82F4" * * The variants with the AXP288 + Type-C connector are all kinds of special: * * 1. They use a Type-C connector which the AXP288 does not support, so when * using a Type-C charger it is not recognized. Unlike most AXP288 devices, * this model actually has mostly working ACPI AC / Battery code, the ACPI code * "solves" this by simply setting the input_current_limit to 3A. * There are still some issues with the ACPI code, so we use this native driver, * and to solve the charging not working (500mA is not enough) issue we hardcode * the 3A input_current_limit like the ACPI code does. * * 2. If no charger is connected the machine boots with the vbus-path disabled. * Normally this is done when a 5V boost converter is active to avoid the PMIC * trying to charge from the 5V boost converter's output. This is done when * an OTG host cable is inserted and the ID pin on the micro-B receptacle is * pulled low and the ID pin has an ACPI event handler associated with it * which re-enables the vbus-path when the ID pin is pulled high when the * OTG host cable is removed. The Type-C connector has no ID pin, there is * no ID pin handler and there appears to be no 5V boost converter, so we * end up not charging because the vbus-path is disabled, until we unplug * the charger which automatically clears the vbus-path disable bit and then * on the second plug-in of the adapter we start charging. To solve the not * charging on first charger plugin we unconditionally enable the vbus-path at * probe on this model, which is safe since there is no 5V boost converter. */ static const struct dmi_system_id axp288_hp_x2_dmi_ids[] = { { .matches = { DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"), DMI_EXACT_MATCH(DMI_BOARD_NAME, "815D"), }, }, { .matches = { DMI_EXACT_MATCH(DMI_SYS_VENDOR, "HP"), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"), DMI_EXACT_MATCH(DMI_BOARD_NAME, "813E"), }, }, {} /* Terminating entry */ }; 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; struct extcon_dev *edev = info->cable.edev; unsigned int val; ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val); if (ret < 0) { dev_err(&info->pdev->dev, "Error reading status (%d)\n", ret); return; } /* Offline? Disable charging and bail */ if (!(val & PS_STAT_VBUS_VALID)) { dev_dbg(&info->pdev->dev, "USB charger disconnected\n"); axp288_charger_enable_charger(info, false); mutex_lock(&info->lock); info->valid = false; mutex_unlock(&info->lock); power_supply_changed(info->psy_usb); return; } /* Determine cable/charger type */ if (dmi_check_system(axp288_hp_x2_dmi_ids)) { /* See comment above axp288_hp_x2_dmi_ids declaration */ dev_dbg(&info->pdev->dev, "HP X2 with Type-C, setting inlmt to 3A\n"); current_limit = 3000000; } else if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) { dev_dbg(&info->pdev->dev, "USB SDP charger is connected\n"); current_limit = 500000; } else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) { dev_dbg(&info->pdev->dev, "USB CDP charger is connected\n"); current_limit = 1500000; } else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) { dev_dbg(&info->pdev->dev, "USB DCP charger is connected\n"); current_limit = 2000000; } else { /* Charger type detection still in progress, bail. */ return; } /* Set vbus current limit first, then enable charger */ ret = axp288_charger_set_vbus_inlmt(info, current_limit); if (ret == 0) axp288_charger_enable_charger(info, true); else dev_err(&info->pdev->dev, "error setting current limit (%d)\n", ret); mutex_lock(&info->lock); info->valid = false; mutex_unlock(&info->lock); 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); struct extcon_dev *edev = info->otg.cable; int ret, usb_host = extcon_get_state(edev, EXTCON_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; /* 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); schedule_work(&info->otg.work); return NOTIFY_OK; } static int 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_err(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_V_LTF_CHRG, ret); return ret; } ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C); if (ret < 0) { dev_err(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_V_HTF_CHRG, ret); return 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, CNTL2_CHG_OUT_TURNON); if (ret < 0) { dev_err(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_CHRG_CTRL2, ret); return 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_err(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_CHRG_CTRL1, ret); return 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_err(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_CC_CTRL, ret); return ret; } if (dmi_check_system(axp288_hp_x2_dmi_ids)) { /* See comment above axp288_hp_x2_dmi_ids declaration */ ret = axp288_charger_vbus_path_select(info, true); if (ret < 0) return ret; } else { /* Set Vhold to the factory default / recommended 4.4V */ val = VBUS_ISPOUT_VHOLD_SET_4400MV << VBUS_ISPOUT_VHOLD_SET_BIT_POS; ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT, VBUS_ISPOUT_VHOLD_SET_MASK, val); if (ret < 0) { dev_err(&info->pdev->dev, "register(%x) write error(%d)\n", AXP20X_VBUS_IPSOUT_MGMT, ret); return ret; } } /* Read current charge voltage and current limit */ ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val); if (ret < 0) { dev_err(&info->pdev->dev, "register(%x) read error(%d)\n", AXP20X_CHRG_CTRL1, ret); return ret; } /* 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; } /* Determine charge current limit */ cc = (val & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS; cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET; info->cc = cc; /* * Do not allow the user to configure higher settings then those * set by the firmware */ info->max_cv = info->cv; info->max_cc = info->cc; return 0; } static void axp288_charger_cancel_work(void *data) { struct axp288_chrg_info *info = data; cancel_work_sync(&info->otg.work); cancel_work_sync(&info->cable.work); } static int axp288_charger_probe(struct platform_device *pdev) { int ret, i, pirq; struct axp288_chrg_info *info; struct device *dev = &pdev->dev; struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); struct power_supply_config charger_cfg = {}; const char *extcon_name = NULL; unsigned int val; /* * Normally the native AXP288 fg/charger drivers are preferred but * on some devices the ACPI drivers should be used instead. */ if (!acpi_quirk_skip_acpi_ac_and_battery()) return -ENODEV; /* * On some devices the fuelgauge and charger parts of the axp288 are * not used, check that the fuelgauge is enabled (CC_CTRL != 0). */ ret = regmap_read(axp20x->regmap, AXP20X_CC_CTRL, &val); if (ret < 0) return ret; if (val == 0) return -ENODEV; info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; mutex_init(&info->lock); info->pdev = pdev; info->regmap = axp20x->regmap; info->regmap_irqc = axp20x->regmap_irqc; info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME); if (IS_ERR(info->cable.edev)) { dev_err_probe(dev, PTR_ERR(info->cable.edev), "extcon_get_extcon_dev(%s) failed\n", AXP288_EXTCON_DEV_NAME); return PTR_ERR(info->cable.edev); } /* * On devices with broken ACPI GPIO event handlers there also is no ACPI * "INT3496" (USB_HOST_EXTCON_HID) device. x86-android-tablets.ko * instantiates an "intel-int3496" extcon on these devs as a workaround. */ if (acpi_quirk_skip_gpio_event_handlers()) extcon_name = "intel-int3496"; else if (acpi_dev_present(USB_HOST_EXTCON_HID, NULL, -1)) extcon_name = USB_HOST_EXTCON_NAME; if (extcon_name) { info->otg.cable = extcon_get_extcon_dev(extcon_name); if (IS_ERR(info->otg.cable)) { dev_err_probe(dev, PTR_ERR(info->otg.cable), "extcon_get_extcon_dev(%s) failed\n", USB_HOST_EXTCON_NAME); return PTR_ERR(info->otg.cable); } dev_info(dev, "Using " USB_HOST_EXTCON_HID " extcon for usb-id\n"); } platform_set_drvdata(pdev, info); ret = charger_init_hw_regs(info); if (ret) return ret; /* Register with power supply class */ charger_cfg.drv_data = info; info->psy_usb = devm_power_supply_register(dev, &axp288_charger_desc, &charger_cfg); if (IS_ERR(info->psy_usb)) { ret = PTR_ERR(info->psy_usb); dev_err(dev, "failed to register power supply: %d\n", ret); return ret; } /* Cancel our work on cleanup, register this before the notifiers */ ret = devm_add_action(dev, axp288_charger_cancel_work, info); if (ret) return ret; /* 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 = devm_extcon_register_notifier_all(dev, info->cable.edev, &info->cable.nb); if (ret) { dev_err(dev, "failed to register cable extcon notifier\n"); return ret; } schedule_work(&info->cable.work); /* 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; if (info->otg.cable) { ret = devm_extcon_register_notifier(dev, info->otg.cable, EXTCON_USB_HOST, &info->otg.id_nb); if (ret) { dev_err(dev, "failed to register EXTCON_USB_HOST notifier\n"); return ret; } schedule_work(&info->otg.work); } /* Register charger interrupts */ for (i = 0; i < CHRG_INTR_END; i++) { pirq = platform_get_irq(info->pdev, i); if (pirq < 0) return pirq; 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); return info->irq[i]; } 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(dev, "failed to request interrupt=%d\n", info->irq[i]); return ret; } } return 0; } static const struct platform_device_id axp288_charger_id_table[] = { { .name = "axp288_charger" }, {}, }; MODULE_DEVICE_TABLE(platform, axp288_charger_id_table); static struct platform_driver axp288_charger_driver = { .probe = axp288_charger_probe, .id_table = axp288_charger_id_table, .driver = { .name = "axp288_charger", }, }; module_platform_driver(axp288_charger_driver); MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>"); MODULE_DESCRIPTION("X-power AXP288 Charger Driver"); MODULE_LICENSE("GPL v2");
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