// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Richtek RT9455WSC battery charger. * * Copyright (C) 2015 Intel Corporation */ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/of.h> #include <linux/pm_runtime.h> #include <linux/power_supply.h> #include <linux/i2c.h> #include <linux/acpi.h> #include <linux/usb/phy.h> #include <linux/regmap.h> #define RT9455_MANUFACTURER … #define RT9455_MODEL_NAME … #define RT9455_DRIVER_NAME … #define RT9455_IRQ_NAME … #define RT9455_PWR_RDY_DELAY … #define RT9455_MAX_CHARGING_TIME … #define RT9455_BATT_PRESENCE_DELAY … #define RT9455_CHARGE_MODE … #define RT9455_BOOST_MODE … #define RT9455_FAULT … #define RT9455_IAICR_100MA … #define RT9455_IAICR_500MA … #define RT9455_IAICR_NO_LIMIT … #define RT9455_CHARGE_DISABLE … #define RT9455_CHARGE_ENABLE … #define RT9455_PWR_FAULT … #define RT9455_PWR_GOOD … #define RT9455_REG_CTRL1 … #define RT9455_REG_CTRL2 … #define RT9455_REG_CTRL3 … #define RT9455_REG_DEV_ID … #define RT9455_REG_CTRL4 … #define RT9455_REG_CTRL5 … #define RT9455_REG_CTRL6 … #define RT9455_REG_CTRL7 … #define RT9455_REG_IRQ1 … #define RT9455_REG_IRQ2 … #define RT9455_REG_IRQ3 … #define RT9455_REG_MASK1 … #define RT9455_REG_MASK2 … #define RT9455_REG_MASK3 … enum rt9455_fields { … }; static const struct reg_field rt9455_reg_fields[] = …; #define GET_MASK(fid) … /* * Each array initialised below shows the possible real-world values for a * group of bits belonging to RT9455 registers. The arrays are sorted in * ascending order. The index of each real-world value represents the value * that is encoded in the group of bits belonging to RT9455 registers. */ /* REG06[6:4] (ICHRG) in uAh */ static const int rt9455_ichrg_values[] = …; /* * When the charger is in charge mode, REG02[7:2] represent battery regulation * voltage. */ /* REG02[7:2] (VOREG) in uV */ static const int rt9455_voreg_values[] = …; #if IS_ENABLED(CONFIG_USB_PHY) /* * When the charger is in boost mode, REG02[7:2] represent boost output * voltage. */ /* REG02[7:2] (Boost output voltage) in uV */ static const int rt9455_boost_voltage_values[] = …; #endif /* REG07[3:0] (VMREG) in uV */ static const int rt9455_vmreg_values[] = …; /* REG05[5:4] (IEOC_PERCENTAGE) */ static const int rt9455_ieoc_percentage_values[] = …; /* REG05[1:0] (MIVR) in uV */ static const int rt9455_mivr_values[] = …; /* REG05[1:0] (IAICR) in uA */ static const int rt9455_iaicr_values[] = …; struct rt9455_info { … }; /* * Iterate through each element of the 'tbl' array until an element whose value * is greater than v is found. Return the index of the respective element, * or the index of the last element in the array, if no such element is found. */ static unsigned int rt9455_find_idx(const int tbl[], int tbl_size, int v) { … } static int rt9455_get_field_val(struct rt9455_info *info, enum rt9455_fields field, const int tbl[], int tbl_size, int *val) { … } static int rt9455_set_field_val(struct rt9455_info *info, enum rt9455_fields field, const int tbl[], int tbl_size, int val) { … } static int rt9455_register_reset(struct rt9455_info *info) { … } /* Charger power supply property routines */ static enum power_supply_property rt9455_charger_properties[] = …; static char *rt9455_charger_supplied_to[] = …; static int rt9455_charger_get_status(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_health(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_battery_presence(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_online(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_current(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_current_max(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_voltage(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_voltage_max(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_term_current(struct rt9455_info *info, union power_supply_propval *val) { … } static int rt9455_charger_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { … } static int rt9455_hw_init(struct rt9455_info *info, u32 ichrg, u32 ieoc_percentage, u32 mivr, u32 iaicr) { … } #if IS_ENABLED(CONFIG_USB_PHY) /* * Before setting the charger into boost mode, boost output voltage is * set. This is needed because boost output voltage may differ from battery * regulation voltage. F_VOREG bits represent either battery regulation voltage * or boost output voltage, depending on the mode the charger is. Both battery * regulation voltage and boost output voltage are read from DT/ACPI during * probe. */ static int rt9455_set_boost_voltage_before_boost_mode(struct rt9455_info *info) { … } #endif /* * Before setting the charger into charge mode, battery regulation voltage is * set. This is needed because boost output voltage may differ from battery * regulation voltage. F_VOREG bits represent either battery regulation voltage * or boost output voltage, depending on the mode the charger is. Both battery * regulation voltage and boost output voltage are read from DT/ACPI during * probe. */ static int rt9455_set_voreg_before_charge_mode(struct rt9455_info *info) { … } static int rt9455_irq_handler_check_irq1_register(struct rt9455_info *info, bool *_is_battery_absent, bool *_alert_userspace) { … } static int rt9455_irq_handler_check_irq2_register(struct rt9455_info *info, bool is_battery_absent, bool *_alert_userspace) { … } static int rt9455_irq_handler_check_irq3_register(struct rt9455_info *info, bool *_alert_userspace) { … } static irqreturn_t rt9455_irq_handler_thread(int irq, void *data) { … } static int rt9455_discover_charger(struct rt9455_info *info, u32 *ichrg, u32 *ieoc_percentage, u32 *mivr, u32 *iaicr) { … } #if IS_ENABLED(CONFIG_USB_PHY) static int rt9455_usb_event_none(struct rt9455_info *info, u8 opa_mode, u8 iaicr) { … } static int rt9455_usb_event_vbus(struct rt9455_info *info, u8 opa_mode, u8 iaicr) { … } static int rt9455_usb_event_id(struct rt9455_info *info, u8 opa_mode, u8 iaicr) { … } static int rt9455_usb_event_charger(struct rt9455_info *info, u8 opa_mode, u8 iaicr) { … } static int rt9455_usb_event(struct notifier_block *nb, unsigned long event, void *power) { … } #endif static void rt9455_pwr_rdy_work_callback(struct work_struct *work) { … } static void rt9455_max_charging_time_work_callback(struct work_struct *work) { … } static void rt9455_batt_presence_work_callback(struct work_struct *work) { … } static const struct power_supply_desc rt9455_charger_desc = …; static bool rt9455_is_writeable_reg(struct device *dev, unsigned int reg) { … } static bool rt9455_is_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config rt9455_regmap_config = …; static int rt9455_probe(struct i2c_client *client) { … } static void rt9455_remove(struct i2c_client *client) { … } static const struct i2c_device_id rt9455_i2c_id_table[] = …; MODULE_DEVICE_TABLE(i2c, rt9455_i2c_id_table); static const struct of_device_id rt9455_of_match[] __maybe_unused = …; MODULE_DEVICE_TABLE(of, rt9455_of_match); #ifdef CONFIG_ACPI static const struct acpi_device_id rt9455_i2c_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, rt9455_i2c_acpi_match); #endif static struct i2c_driver rt9455_driver = …; module_i2c_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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