| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Anda-Maria Nicolae | 7406 | 100.00% | 3 | 100.00% |
| Total | 7406 | 3 |
/* * Driver for Richtek RT9455WSC battery charger. * * Copyright (C) 2015 Intel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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 <linux/module.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/of_irq.h> #include <linux/of_device.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 "Richtek" #define RT9455_MODEL_NAME "RT9455" #define RT9455_DRIVER_NAME "rt9455-charger" #define RT9455_IRQ_NAME "interrupt" #define RT9455_PWR_RDY_DELAY 1 /* 1 second */ #define RT9455_MAX_CHARGING_TIME 21600 /* 6 hrs */ #define RT9455_BATT_PRESENCE_DELAY 60 /* 60 seconds */ #define RT9455_CHARGE_MODE 0x00 #define RT9455_BOOST_MODE 0x01 #define RT9455_FAULT 0x03 #define RT9455_IAICR_100MA 0x00 #define RT9455_IAICR_500MA 0x01 #define RT9455_IAICR_NO_LIMIT 0x03 #define RT9455_CHARGE_DISABLE 0x00 #define RT9455_CHARGE_ENABLE 0x01 #define RT9455_PWR_FAULT 0x00 #define RT9455_PWR_GOOD 0x01 #define RT9455_REG_CTRL1 0x00 /* CTRL1 reg address */ #define RT9455_REG_CTRL2 0x01 /* CTRL2 reg address */ #define RT9455_REG_CTRL3 0x02 /* CTRL3 reg address */ #define RT9455_REG_DEV_ID 0x03 /* DEV_ID reg address */ #define RT9455_REG_CTRL4 0x04 /* CTRL4 reg address */ #define RT9455_REG_CTRL5 0x05 /* CTRL5 reg address */ #define RT9455_REG_CTRL6 0x06 /* CTRL6 reg address */ #define RT9455_REG_CTRL7 0x07 /* CTRL7 reg address */ #define RT9455_REG_IRQ1 0x08 /* IRQ1 reg address */ #define RT9455_REG_IRQ2 0x09 /* IRQ2 reg address */ #define RT9455_REG_IRQ3 0x0A /* IRQ3 reg address */ #define RT9455_REG_MASK1 0x0B /* MASK1 reg address */ #define RT9455_REG_MASK2 0x0C /* MASK2 reg address */ #define RT9455_REG_MASK3 0x0D /* MASK3 reg address */ enum rt9455_fields { F_STAT, F_BOOST, F_PWR_RDY, F_OTG_PIN_POLARITY, /* CTRL1 reg fields */ F_IAICR, F_TE_SHDN_EN, F_HIGHER_OCP, F_TE, F_IAICR_INT, F_HIZ, F_OPA_MODE, /* CTRL2 reg fields */ F_VOREG, F_OTG_PL, F_OTG_EN, /* CTRL3 reg fields */ F_VENDOR_ID, F_CHIP_REV, /* DEV_ID reg fields */ F_RST, /* CTRL4 reg fields */ F_TMR_EN, F_MIVR, F_IPREC, F_IEOC_PERCENTAGE, /* CTRL5 reg fields*/ F_IAICR_SEL, F_ICHRG, F_VPREC, /* CTRL6 reg fields */ F_BATD_EN, F_CHG_EN, F_VMREG, /* CTRL7 reg fields */ F_TSDI, F_VINOVPI, F_BATAB, /* IRQ1 reg fields */ F_CHRVPI, F_CHBATOVI, F_CHTERMI, F_CHRCHGI, F_CH32MI, F_CHTREGI, F_CHMIVRI, /* IRQ2 reg fields */ F_BSTBUSOVI, F_BSTOLI, F_BSTLOWVI, F_BST32SI, /* IRQ3 reg fields */ F_TSDM, F_VINOVPIM, F_BATABM, /* MASK1 reg fields */ F_CHRVPIM, F_CHBATOVIM, F_CHTERMIM, F_CHRCHGIM, F_CH32MIM, F_CHTREGIM, F_CHMIVRIM, /* MASK2 reg fields */ F_BSTVINOVIM, F_BSTOLIM, F_BSTLOWVIM, F_BST32SIM, /* MASK3 reg fields */ F_MAX_FIELDS }; static const struct reg_field rt9455_reg_fields[] = { [F_STAT] = REG_FIELD(RT9455_REG_CTRL1, 4, 5), [F_BOOST] = REG_FIELD(RT9455_REG_CTRL1, 3, 3), [F_PWR_RDY] = REG_FIELD(RT9455_REG_CTRL1, 2, 2), [F_OTG_PIN_POLARITY] = REG_FIELD(RT9455_REG_CTRL1, 1, 1), [F_IAICR] = REG_FIELD(RT9455_REG_CTRL2, 6, 7), [F_TE_SHDN_EN] = REG_FIELD(RT9455_REG_CTRL2, 5, 5), [F_HIGHER_OCP] = REG_FIELD(RT9455_REG_CTRL2, 4, 4), [F_TE] = REG_FIELD(RT9455_REG_CTRL2, 3, 3), [F_IAICR_INT] = REG_FIELD(RT9455_REG_CTRL2, 2, 2), [F_HIZ] = REG_FIELD(RT9455_REG_CTRL2, 1, 1), [F_OPA_MODE] = REG_FIELD(RT9455_REG_CTRL2, 0, 0), [F_VOREG] = REG_FIELD(RT9455_REG_CTRL3, 2, 7), [F_OTG_PL] = REG_FIELD(RT9455_REG_CTRL3, 1, 1), [F_OTG_EN] = REG_FIELD(RT9455_REG_CTRL3, 0, 0), [F_VENDOR_ID] = REG_FIELD(RT9455_REG_DEV_ID, 4, 7), [F_CHIP_REV] = REG_FIELD(RT9455_REG_DEV_ID, 0, 3), [F_RST] = REG_FIELD(RT9455_REG_CTRL4, 7, 7), [F_TMR_EN] = REG_FIELD(RT9455_REG_CTRL5, 7, 7), [F_MIVR] = REG_FIELD(RT9455_REG_CTRL5, 4, 5), [F_IPREC] = REG_FIELD(RT9455_REG_CTRL5, 2, 3), [F_IEOC_PERCENTAGE] = REG_FIELD(RT9455_REG_CTRL5, 0, 1), [F_IAICR_SEL] = REG_FIELD(RT9455_REG_CTRL6, 7, 7), [F_ICHRG] = REG_FIELD(RT9455_REG_CTRL6, 4, 6), [F_VPREC] = REG_FIELD(RT9455_REG_CTRL6, 0, 2), [F_BATD_EN] = REG_FIELD(RT9455_REG_CTRL7, 6, 6), [F_CHG_EN] = REG_FIELD(RT9455_REG_CTRL7, 4, 4), [F_VMREG] = REG_FIELD(RT9455_REG_CTRL7, 0, 3), [F_TSDI] = REG_FIELD(RT9455_REG_IRQ1, 7, 7), [F_VINOVPI] = REG_FIELD(RT9455_REG_IRQ1, 6, 6), [F_BATAB] = REG_FIELD(RT9455_REG_IRQ1, 0, 0), [F_CHRVPI] = REG_FIELD(RT9455_REG_IRQ2, 7, 7), [F_CHBATOVI] = REG_FIELD(RT9455_REG_IRQ2, 5, 5), [F_CHTERMI] = REG_FIELD(RT9455_REG_IRQ2, 4, 4), [F_CHRCHGI] = REG_FIELD(RT9455_REG_IRQ2, 3, 3), [F_CH32MI] = REG_FIELD(RT9455_REG_IRQ2, 2, 2), [F_CHTREGI] = REG_FIELD(RT9455_REG_IRQ2, 1, 1), [F_CHMIVRI] = REG_FIELD(RT9455_REG_IRQ2, 0, 0), [F_BSTBUSOVI] = REG_FIELD(RT9455_REG_IRQ3, 7, 7), [F_BSTOLI] = REG_FIELD(RT9455_REG_IRQ3, 6, 6), [F_BSTLOWVI] = REG_FIELD(RT9455_REG_IRQ3, 5, 5), [F_BST32SI] = REG_FIELD(RT9455_REG_IRQ3, 3, 3), [F_TSDM] = REG_FIELD(RT9455_REG_MASK1, 7, 7), [F_VINOVPIM] = REG_FIELD(RT9455_REG_MASK1, 6, 6), [F_BATABM] = REG_FIELD(RT9455_REG_MASK1, 0, 0), [F_CHRVPIM] = REG_FIELD(RT9455_REG_MASK2, 7, 7), [F_CHBATOVIM] = REG_FIELD(RT9455_REG_MASK2, 5, 5), [F_CHTERMIM] = REG_FIELD(RT9455_REG_MASK2, 4, 4), [F_CHRCHGIM] = REG_FIELD(RT9455_REG_MASK2, 3, 3), [F_CH32MIM] = REG_FIELD(RT9455_REG_MASK2, 2, 2), [F_CHTREGIM] = REG_FIELD(RT9455_REG_MASK2, 1, 1), [F_CHMIVRIM] = REG_FIELD(RT9455_REG_MASK2, 0, 0), [F_BSTVINOVIM] = REG_FIELD(RT9455_REG_MASK3, 7, 7), [F_BSTOLIM] = REG_FIELD(RT9455_REG_MASK3, 6, 6), [F_BSTLOWVIM] = REG_FIELD(RT9455_REG_MASK3, 5, 5), [F_BST32SIM] = REG_FIELD(RT9455_REG_MASK3, 3, 3), }; #define GET_MASK(fid) (BIT(rt9455_reg_fields[fid].msb + 1) - \ BIT(rt9455_reg_fields[fid].lsb)) /* * 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[] = { 500000, 650000, 800000, 950000, 1100000, 1250000, 1400000, 1550000 }; /* * 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[] = { 3500000, 3520000, 3540000, 3560000, 3580000, 3600000, 3620000, 3640000, 3660000, 3680000, 3700000, 3720000, 3740000, 3760000, 3780000, 3800000, 3820000, 3840000, 3860000, 3880000, 3900000, 3920000, 3940000, 3960000, 3980000, 4000000, 4020000, 4040000, 4060000, 4080000, 4100000, 4120000, 4140000, 4160000, 4180000, 4200000, 4220000, 4240000, 4260000, 4280000, 4300000, 4330000, 4350000, 4370000, 4390000, 4410000, 4430000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000 }; /* * 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[] = { 4425000, 4450000, 4475000, 4500000, 4525000, 4550000, 4575000, 4600000, 4625000, 4650000, 4675000, 4700000, 4725000, 4750000, 4775000, 4800000, 4825000, 4850000, 4875000, 4900000, 4925000, 4950000, 4975000, 5000000, 5025000, 5050000, 5075000, 5100000, 5125000, 5150000, 5175000, 5200000, 5225000, 5250000, 5275000, 5300000, 5325000, 5350000, 5375000, 5400000, 5425000, 5450000, 5475000, 5500000, 5525000, 5550000, 5575000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, }; /* REG07[3:0] (VMREG) in uV */ static const int rt9455_vmreg_values[] = { 4200000, 4220000, 4240000, 4260000, 4280000, 4300000, 4320000, 4340000, 4360000, 4380000, 4400000, 4430000, 4450000, 4450000, 4450000, 4450000 }; /* REG05[5:4] (IEOC_PERCENTAGE) */ static const int rt9455_ieoc_percentage_values[] = { 10, 30, 20, 30 }; /* REG05[1:0] (MIVR) in uV */ static const int rt9455_mivr_values[] = { 4000000, 4250000, 4500000, 5000000 }; /* REG05[1:0] (IAICR) in uA */ static const int rt9455_iaicr_values[] = { 100000, 500000, 1000000, 2000000 }; struct rt9455_info { struct i2c_client *client; struct regmap *regmap; struct regmap_field *regmap_fields[F_MAX_FIELDS]; struct power_supply *charger; #if IS_ENABLED(CONFIG_USB_PHY) struct usb_phy *usb_phy; struct notifier_block nb; #endif struct delayed_work pwr_rdy_work; struct delayed_work max_charging_time_work; struct delayed_work batt_presence_work; u32 voreg; u32 boost_voltage; }; /* * 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) { int i; /* * No need to iterate until the last index in the table because * if no element greater than v is found in the table, * or if only the last element is greater than v, * function returns the index of the last element. */ for (i = 0; i < tbl_size - 1; i++) if (v <= tbl[i]) return i; return (tbl_size - 1); } static int rt9455_get_field_val(struct rt9455_info *info, enum rt9455_fields field, const int tbl[], int tbl_size, int *val) { unsigned int v; int ret; ret = regmap_field_read(info->regmap_fields[field], &v); if (ret) return ret; v = (v >= tbl_size) ? (tbl_size - 1) : v; *val = tbl[v]; return 0; } static int rt9455_set_field_val(struct rt9455_info *info, enum rt9455_fields field, const int tbl[], int tbl_size, int val) { unsigned int idx = rt9455_find_idx(tbl, tbl_size, val); return regmap_field_write(info->regmap_fields[field], idx); } static int rt9455_register_reset(struct rt9455_info *info) { struct device *dev = &info->client->dev; unsigned int v; int ret, limit = 100; ret = regmap_field_write(info->regmap_fields[F_RST], 0x01); if (ret) { dev_err(dev, "Failed to set RST bit\n"); return ret; } /* * To make sure that reset operation has finished, loop until RST bit * is set to 0. */ do { ret = regmap_field_read(info->regmap_fields[F_RST], &v); if (ret) { dev_err(dev, "Failed to read RST bit\n"); return ret; } if (!v) break; usleep_range(10, 100); } while (--limit); if (!limit) return -EIO; return 0; } /* Charger power supply property routines */ static enum power_supply_property rt9455_charger_properties[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_ONLINE, 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_SCOPE, POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, POWER_SUPPLY_PROP_MODEL_NAME, POWER_SUPPLY_PROP_MANUFACTURER, }; static char *rt9455_charger_supplied_to[] = { "main-battery", }; static int rt9455_charger_get_status(struct rt9455_info *info, union power_supply_propval *val) { unsigned int v, pwr_rdy; int ret; ret = regmap_field_read(info->regmap_fields[F_PWR_RDY], &pwr_rdy); if (ret) { dev_err(&info->client->dev, "Failed to read PWR_RDY bit\n"); return ret; } /* * If PWR_RDY bit is unset, the battery is discharging. Otherwise, * STAT bits value must be checked. */ if (!pwr_rdy) { val->intval = POWER_SUPPLY_STATUS_DISCHARGING; return 0; } ret = regmap_field_read(info->regmap_fields[F_STAT], &v); if (ret) { dev_err(&info->client->dev, "Failed to read STAT bits\n"); return ret; } switch (v) { case 0: /* * If PWR_RDY bit is set, but STAT bits value is 0, the charger * may be in one of the following cases: * 1. CHG_EN bit is 0. * 2. CHG_EN bit is 1 but the battery is not connected. * In any of these cases, POWER_SUPPLY_STATUS_NOT_CHARGING is * returned. */ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; return 0; case 1: val->intval = POWER_SUPPLY_STATUS_CHARGING; return 0; case 2: val->intval = POWER_SUPPLY_STATUS_FULL; return 0; default: val->intval = POWER_SUPPLY_STATUS_UNKNOWN; return 0; } } static int rt9455_charger_get_health(struct rt9455_info *info, union power_supply_propval *val) { struct device *dev = &info->client->dev; unsigned int v; int ret; val->intval = POWER_SUPPLY_HEALTH_GOOD; ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &v); if (ret) { dev_err(dev, "Failed to read IRQ1 register\n"); return ret; } if (v & GET_MASK(F_TSDI)) { val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; return 0; } if (v & GET_MASK(F_VINOVPI)) { val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; return 0; } if (v & GET_MASK(F_BATAB)) { val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; return 0; } ret = regmap_read(info->regmap, RT9455_REG_IRQ2, &v); if (ret) { dev_err(dev, "Failed to read IRQ2 register\n"); return ret; } if (v & GET_MASK(F_CHBATOVI)) { val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; return 0; } if (v & GET_MASK(F_CH32MI)) { val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; return 0; } ret = regmap_read(info->regmap, RT9455_REG_IRQ3, &v); if (ret) { dev_err(dev, "Failed to read IRQ3 register\n"); return ret; } if (v & GET_MASK(F_BSTBUSOVI)) { val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; return 0; } if (v & GET_MASK(F_BSTOLI)) { val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; return 0; } if (v & GET_MASK(F_BSTLOWVI)) { val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; return 0; } if (v & GET_MASK(F_BST32SI)) { val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; return 0; } ret = regmap_field_read(info->regmap_fields[F_STAT], &v); if (ret) { dev_err(dev, "Failed to read STAT bits\n"); return ret; } if (v == RT9455_FAULT) { val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; return 0; } return 0; } static int rt9455_charger_get_battery_presence(struct rt9455_info *info, union power_supply_propval *val) { unsigned int v; int ret; ret = regmap_field_read(info->regmap_fields[F_BATAB], &v); if (ret) { dev_err(&info->client->dev, "Failed to read BATAB bit\n"); return ret; } /* * Since BATAB is 1 when battery is NOT present and 0 otherwise, * !BATAB is returned. */ val->intval = !v; return 0; } static int rt9455_charger_get_online(struct rt9455_info *info, union power_supply_propval *val) { unsigned int v; int ret; ret = regmap_field_read(info->regmap_fields[F_PWR_RDY], &v); if (ret) { dev_err(&info->client->dev, "Failed to read PWR_RDY bit\n"); return ret; } val->intval = (int)v; return 0; } static int rt9455_charger_get_current(struct rt9455_info *info, union power_supply_propval *val) { int curr; int ret; ret = rt9455_get_field_val(info, F_ICHRG, rt9455_ichrg_values, ARRAY_SIZE(rt9455_ichrg_values), &curr); if (ret) { dev_err(&info->client->dev, "Failed to read ICHRG value\n"); return ret; } val->intval = curr; return 0; } static int rt9455_charger_get_current_max(struct rt9455_info *info, union power_supply_propval *val) { int idx = ARRAY_SIZE(rt9455_ichrg_values) - 1; val->intval = rt9455_ichrg_values[idx]; return 0; } static int rt9455_charger_get_voltage(struct rt9455_info *info, union power_supply_propval *val) { int voltage; int ret; ret = rt9455_get_field_val(info, F_VOREG, rt9455_voreg_values, ARRAY_SIZE(rt9455_voreg_values), &voltage); if (ret) { dev_err(&info->client->dev, "Failed to read VOREG value\n"); return ret; } val->intval = voltage; return 0; } static int rt9455_charger_get_voltage_max(struct rt9455_info *info, union power_supply_propval *val) { int idx = ARRAY_SIZE(rt9455_vmreg_values) - 1; val->intval = rt9455_vmreg_values[idx]; return 0; } static int rt9455_charger_get_term_current(struct rt9455_info *info, union power_supply_propval *val) { struct device *dev = &info->client->dev; int ichrg, ieoc_percentage, ret; ret = rt9455_get_field_val(info, F_ICHRG, rt9455_ichrg_values, ARRAY_SIZE(rt9455_ichrg_values), &ichrg); if (ret) { dev_err(dev, "Failed to read ICHRG value\n"); return ret; } ret = rt9455_get_field_val(info, F_IEOC_PERCENTAGE, rt9455_ieoc_percentage_values, ARRAY_SIZE(rt9455_ieoc_percentage_values), &ieoc_percentage); if (ret) { dev_err(dev, "Failed to read IEOC value\n"); return ret; } val->intval = ichrg * ieoc_percentage / 100; return 0; } static int rt9455_charger_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct rt9455_info *info = power_supply_get_drvdata(psy); switch (psp) { case POWER_SUPPLY_PROP_STATUS: return rt9455_charger_get_status(info, val); case POWER_SUPPLY_PROP_HEALTH: return rt9455_charger_get_health(info, val); case POWER_SUPPLY_PROP_PRESENT: return rt9455_charger_get_battery_presence(info, val); case POWER_SUPPLY_PROP_ONLINE: return rt9455_charger_get_online(info, val); case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: return rt9455_charger_get_current(info, val); case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: return rt9455_charger_get_current_max(info, val); case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: return rt9455_charger_get_voltage(info, val); case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: return rt9455_charger_get_voltage_max(info, val); case POWER_SUPPLY_PROP_SCOPE: val->intval = POWER_SUPPLY_SCOPE_SYSTEM; return 0; case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: return rt9455_charger_get_term_current(info, val); case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = RT9455_MODEL_NAME; return 0; case POWER_SUPPLY_PROP_MANUFACTURER: val->strval = RT9455_MANUFACTURER; return 0; default: return -ENODATA; } } static int rt9455_hw_init(struct rt9455_info *info, u32 ichrg, u32 ieoc_percentage, u32 mivr, u32 iaicr) { struct device *dev = &info->client->dev; int idx, ret; ret = rt9455_register_reset(info); if (ret) { dev_err(dev, "Power On Reset failed\n"); return ret; } /* Set TE bit in order to enable end of charge detection */ ret = regmap_field_write(info->regmap_fields[F_TE], 1); if (ret) { dev_err(dev, "Failed to set TE bit\n"); return ret; } /* Set TE_SHDN_EN bit in order to enable end of charge detection */ ret = regmap_field_write(info->regmap_fields[F_TE_SHDN_EN], 1); if (ret) { dev_err(dev, "Failed to set TE_SHDN_EN bit\n"); return ret; } /* * Set BATD_EN bit in order to enable battery detection * when charging is done */ ret = regmap_field_write(info->regmap_fields[F_BATD_EN], 1); if (ret) { dev_err(dev, "Failed to set BATD_EN bit\n"); return ret; } /* * Disable Safety Timer. In charge mode, this timer terminates charging * if no read or write via I2C is done within 32 minutes. This timer * avoids overcharging the baterry when the OS is not loaded and the * charger is connected to a power source. * In boost mode, this timer triggers BST32SI interrupt if no read or * write via I2C is done within 32 seconds. * When the OS is loaded and the charger driver is inserted, it is used * delayed_work, named max_charging_time_work, to avoid overcharging * the battery. */ ret = regmap_field_write(info->regmap_fields[F_TMR_EN], 0x00); if (ret) { dev_err(dev, "Failed to disable Safety Timer\n"); return ret; } /* Set ICHRG to value retrieved from device-specific data */ ret = rt9455_set_field_val(info, F_ICHRG, rt9455_ichrg_values, ARRAY_SIZE(rt9455_ichrg_values), ichrg); if (ret) { dev_err(dev, "Failed to set ICHRG value\n"); return ret; } /* Set IEOC Percentage to value retrieved from device-specific data */ ret = rt9455_set_field_val(info, F_IEOC_PERCENTAGE, rt9455_ieoc_percentage_values, ARRAY_SIZE(rt9455_ieoc_percentage_values), ieoc_percentage); if (ret) { dev_err(dev, "Failed to set IEOC Percentage value\n"); return ret; } /* Set VOREG to value retrieved from device-specific data */ ret = rt9455_set_field_val(info, F_VOREG, rt9455_voreg_values, ARRAY_SIZE(rt9455_voreg_values), info->voreg); if (ret) { dev_err(dev, "Failed to set VOREG value\n"); return ret; } /* Set VMREG value to maximum (4.45V). */ idx = ARRAY_SIZE(rt9455_vmreg_values) - 1; ret = rt9455_set_field_val(info, F_VMREG, rt9455_vmreg_values, ARRAY_SIZE(rt9455_vmreg_values), rt9455_vmreg_values[idx]); if (ret) { dev_err(dev, "Failed to set VMREG value\n"); return ret; } /* * Set MIVR to value retrieved from device-specific data. * If no value is specified, default value for MIVR is 4.5V. */ if (mivr == -1) mivr = 4500000; ret = rt9455_set_field_val(info, F_MIVR, rt9455_mivr_values, ARRAY_SIZE(rt9455_mivr_values), mivr); if (ret) { dev_err(dev, "Failed to set MIVR value\n"); return ret; } /* * Set IAICR to value retrieved from device-specific data. * If no value is specified, default value for IAICR is 500 mA. */ if (iaicr == -1) iaicr = 500000; ret = rt9455_set_field_val(info, F_IAICR, rt9455_iaicr_values, ARRAY_SIZE(rt9455_iaicr_values), iaicr); if (ret) { dev_err(dev, "Failed to set IAICR value\n"); return ret; } /* * Set IAICR_INT bit so that IAICR value is determined by IAICR bits * and not by OTG pin. */ ret = regmap_field_write(info->regmap_fields[F_IAICR_INT], 0x01); if (ret) { dev_err(dev, "Failed to set IAICR_INT bit\n"); return ret; } /* * Disable CHMIVRI interrupt. Because the driver sets MIVR value, * CHMIVRI is triggered, but there is no action to be taken by the * driver when CHMIVRI is triggered. */ ret = regmap_field_write(info->regmap_fields[F_CHMIVRIM], 0x01); if (ret) { dev_err(dev, "Failed to mask CHMIVRI interrupt\n"); return ret; } return 0; } #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) { struct device *dev = &info->client->dev; int ret; ret = rt9455_set_field_val(info, F_VOREG, rt9455_boost_voltage_values, ARRAY_SIZE(rt9455_boost_voltage_values), info->boost_voltage); if (ret) { dev_err(dev, "Failed to set boost output voltage value\n"); return ret; } return 0; } #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) { struct device *dev = &info->client->dev; int ret; ret = rt9455_set_field_val(info, F_VOREG, rt9455_voreg_values, ARRAY_SIZE(rt9455_voreg_values), info->voreg); if (ret) { dev_err(dev, "Failed to set VOREG value\n"); return ret; } return 0; } static int rt9455_irq_handler_check_irq1_register(struct rt9455_info *info, bool *_is_battery_absent, bool *_alert_userspace) { unsigned int irq1, mask1, mask2; struct device *dev = &info->client->dev; bool is_battery_absent = false; bool alert_userspace = false; int ret; ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &irq1); if (ret) { dev_err(dev, "Failed to read IRQ1 register\n"); return ret; } ret = regmap_read(info->regmap, RT9455_REG_MASK1, &mask1); if (ret) { dev_err(dev, "Failed to read MASK1 register\n"); return ret; } if (irq1 & GET_MASK(F_TSDI)) { dev_err(dev, "Thermal shutdown fault occurred\n"); alert_userspace = true; } if (irq1 & GET_MASK(F_VINOVPI)) { dev_err(dev, "Overvoltage input occurred\n"); alert_userspace = true; } if (irq1 & GET_MASK(F_BATAB)) { dev_err(dev, "Battery absence occurred\n"); is_battery_absent = true; alert_userspace = true; if ((mask1 & GET_MASK(F_BATABM)) == 0) { ret = regmap_field_write(info->regmap_fields[F_BATABM], 0x01); if (ret) { dev_err(dev, "Failed to mask BATAB interrupt\n"); return ret; } } ret = regmap_read(info->regmap, RT9455_REG_MASK2, &mask2); if (ret) { dev_err(dev, "Failed to read MASK2 register\n"); return ret; } if (mask2 & GET_MASK(F_CHTERMIM)) { ret = regmap_field_write( info->regmap_fields[F_CHTERMIM], 0x00); if (ret) { dev_err(dev, "Failed to unmask CHTERMI interrupt\n"); return ret; } } if (mask2 & GET_MASK(F_CHRCHGIM)) { ret = regmap_field_write( info->regmap_fields[F_CHRCHGIM], 0x00); if (ret) { dev_err(dev, "Failed to unmask CHRCHGI interrupt\n"); return ret; } } /* * When the battery is absent, max_charging_time_work is * cancelled, since no charging is done. */ cancel_delayed_work_sync(&info->max_charging_time_work); /* * Since no interrupt is triggered when the battery is * reconnected, max_charging_time_work is not rescheduled. * Therefore, batt_presence_work is scheduled to check whether * the battery is still absent or not. */ queue_delayed_work(system_power_efficient_wq, &info->batt_presence_work, RT9455_BATT_PRESENCE_DELAY * HZ); } *_is_battery_absent = is_battery_absent; if (alert_userspace) *_alert_userspace = alert_userspace; return 0; } static int rt9455_irq_handler_check_irq2_register(struct rt9455_info *info, bool is_battery_absent, bool *_alert_userspace) { unsigned int irq2, mask2; struct device *dev = &info->client->dev; bool alert_userspace = false; int ret; ret = regmap_read(info->regmap, RT9455_REG_IRQ2, &irq2); if (ret) { dev_err(dev, "Failed to read IRQ2 register\n"); return ret; } ret = regmap_read(info->regmap, RT9455_REG_MASK2, &mask2); if (ret) { dev_err(dev, "Failed to read MASK2 register\n"); return ret; } if (irq2 & GET_MASK(F_CHRVPI)) { dev_dbg(dev, "Charger fault occurred\n"); /* * CHRVPI bit is set in 2 cases: * 1. when the power source is connected to the charger. * 2. when the power source is disconnected from the charger. * To identify the case, PWR_RDY bit is checked. Because * PWR_RDY bit is set / cleared after CHRVPI interrupt is * triggered, it is used delayed_work to later read PWR_RDY bit. * Also, do not set to true alert_userspace, because there is no * need to notify userspace when CHRVPI interrupt has occurred. * Userspace will be notified after PWR_RDY bit is read. */ queue_delayed_work(system_power_efficient_wq, &info->pwr_rdy_work, RT9455_PWR_RDY_DELAY * HZ); } if (irq2 & GET_MASK(F_CHBATOVI)) { dev_err(dev, "Battery OVP occurred\n"); alert_userspace = true; } if (irq2 & GET_MASK(F_CHTERMI)) { dev_dbg(dev, "Charge terminated\n"); if (!is_battery_absent) { if ((mask2 & GET_MASK(F_CHTERMIM)) == 0) { ret = regmap_field_write( info->regmap_fields[F_CHTERMIM], 0x01); if (ret) { dev_err(dev, "Failed to mask CHTERMI interrupt\n"); return ret; } /* * Update MASK2 value, since CHTERMIM bit is * set. */ mask2 = mask2 | GET_MASK(F_CHTERMIM); } cancel_delayed_work_sync(&info->max_charging_time_work); alert_userspace = true; } } if (irq2 & GET_MASK(F_CHRCHGI)) { dev_dbg(dev, "Recharge request\n"); ret = regmap_field_write(info->regmap_fields[F_CHG_EN], RT9455_CHARGE_ENABLE); if (ret) { dev_err(dev, "Failed to enable charging\n"); return ret; } if (mask2 & GET_MASK(F_CHTERMIM)) { ret = regmap_field_write( info->regmap_fields[F_CHTERMIM], 0x00); if (ret) { dev_err(dev, "Failed to unmask CHTERMI interrupt\n"); return ret; } /* Update MASK2 value, since CHTERMIM bit is cleared. */ mask2 = mask2 & ~GET_MASK(F_CHTERMIM); } if (!is_battery_absent) { /* * No need to check whether the charger is connected to * power source when CHRCHGI is received, since CHRCHGI * is not triggered if the charger is not connected to * the power source. */ queue_delayed_work(system_power_efficient_wq, &info->max_charging_time_work, RT9455_MAX_CHARGING_TIME * HZ); alert_userspace = true; } } if (irq2 & GET_MASK(F_CH32MI)) { dev_err(dev, "Charger fault. 32 mins timeout occurred\n"); alert_userspace = true; } if (irq2 & GET_MASK(F_CHTREGI)) { dev_warn(dev, "Charger warning. Thermal regulation loop active\n"); alert_userspace = true; } if (irq2 & GET_MASK(F_CHMIVRI)) { dev_dbg(dev, "Charger warning. Input voltage MIVR loop active\n"); } if (alert_userspace) *_alert_userspace = alert_userspace; return 0; } static int rt9455_irq_handler_check_irq3_register(struct rt9455_info *info, bool *_alert_userspace) { unsigned int irq3, mask3; struct device *dev = &info->client->dev; bool alert_userspace = false; int ret; ret = regmap_read(info->regmap, RT9455_REG_IRQ3, &irq3); if (ret) { dev_err(dev, "Failed to read IRQ3 register\n"); return ret; } ret = regmap_read(info->regmap, RT9455_REG_MASK3, &mask3); if (ret) { dev_err(dev, "Failed to read MASK3 register\n"); return ret; } if (irq3 & GET_MASK(F_BSTBUSOVI)) { dev_err(dev, "Boost fault. Overvoltage input occurred\n"); alert_userspace = true; } if (irq3 & GET_MASK(F_BSTOLI)) { dev_err(dev, "Boost fault. Overload\n"); alert_userspace = true; } if (irq3 & GET_MASK(F_BSTLOWVI)) { dev_err(dev, "Boost fault. Battery voltage too low\n"); alert_userspace = true; } if (irq3 & GET_MASK(F_BST32SI)) { dev_err(dev, "Boost fault. 32 seconds timeout occurred.\n"); alert_userspace = true; } if (alert_userspace) { dev_info(dev, "Boost fault occurred, therefore the charger goes into charge mode\n"); ret = rt9455_set_voreg_before_charge_mode(info); if (ret) { dev_err(dev, "Failed to set VOREG before entering charge mode\n"); return ret; } ret = regmap_field_write(info->regmap_fields[F_OPA_MODE], RT9455_CHARGE_MODE); if (ret) { dev_err(dev, "Failed to set charger in charge mode\n"); return ret; } *_alert_userspace = alert_userspace; } return 0; } static irqreturn_t rt9455_irq_handler_thread(int irq, void *data) { struct rt9455_info *info = data; struct device *dev; bool alert_userspace = false; bool is_battery_absent = false; unsigned int status; int ret; if (!info) return IRQ_NONE; dev = &info->client->dev; if (irq != info->client->irq) { dev_err(dev, "Interrupt is not for RT9455 charger\n"); return IRQ_NONE; } ret = regmap_field_read(info->regmap_fields[F_STAT], &status); if (ret) { dev_err(dev, "Failed to read STAT bits\n"); return IRQ_HANDLED; } dev_dbg(dev, "Charger status is %d\n", status); /* * Each function that processes an IRQ register receives as output * parameter alert_userspace pointer. alert_userspace is set to true * in such a function only if an interrupt has occurred in the * respective interrupt register. This way, it is avoided the following * case: interrupt occurs only in IRQ1 register, * rt9455_irq_handler_check_irq1_register() function sets to true * alert_userspace, but rt9455_irq_handler_check_irq2_register() * and rt9455_irq_handler_check_irq3_register() functions set to false * alert_userspace and power_supply_changed() is never called. */ ret = rt9455_irq_handler_check_irq1_register(info, &is_battery_absent, &alert_userspace); if (ret) { dev_err(dev, "Failed to handle IRQ1 register\n"); return IRQ_HANDLED; } ret = rt9455_irq_handler_check_irq2_register(info, is_battery_absent, &alert_userspace); if (ret) { dev_err(dev, "Failed to handle IRQ2 register\n"); return IRQ_HANDLED; } ret = rt9455_irq_handler_check_irq3_register(info, &alert_userspace); if (ret) { dev_err(dev, "Failed to handle IRQ3 register\n"); return IRQ_HANDLED; } if (alert_userspace) { /* * Sometimes, an interrupt occurs while rt9455_probe() function * is executing and power_supply_register() is not yet called. * Do not call power_supply_changed() in this case. */ if (info->charger) power_supply_changed(info->charger); } return IRQ_HANDLED; } static int rt9455_discover_charger(struct rt9455_info *info, u32 *ichrg, u32 *ieoc_percentage, u32 *mivr, u32 *iaicr) { struct device *dev = &info->client->dev; int ret; if (!dev->of_node && !ACPI_HANDLE(dev)) { dev_err(dev, "No support for either device tree or ACPI\n"); return -EINVAL; } /* * ICHRG, IEOC_PERCENTAGE, VOREG and boost output voltage are mandatory * parameters. */ ret = device_property_read_u32(dev, "richtek,output-charge-current", ichrg); if (ret) { dev_err(dev, "Error: missing \"output-charge-current\" property\n"); return ret; } ret = device_property_read_u32(dev, "richtek,end-of-charge-percentage", ieoc_percentage); if (ret) { dev_err(dev, "Error: missing \"end-of-charge-percentage\" property\n"); return ret; } ret = device_property_read_u32(dev, "richtek,battery-regulation-voltage", &info->voreg); if (ret) { dev_err(dev, "Error: missing \"battery-regulation-voltage\" property\n"); return ret; } ret = device_property_read_u32(dev, "richtek,boost-output-voltage", &info->boost_voltage); if (ret) { dev_err(dev, "Error: missing \"boost-output-voltage\" property\n"); return ret; } /* * MIVR and IAICR are optional parameters. Do not return error if one of * them is not present in ACPI table or device tree specification. */ device_property_read_u32(dev, "richtek,min-input-voltage-regulation", mivr); device_property_read_u32(dev, "richtek,avg-input-current-regulation", iaicr); return 0; } #if IS_ENABLED(CONFIG_USB_PHY) static int rt9455_usb_event_none(struct rt9455_info *info, u8 opa_mode, u8 iaicr) { struct device *dev = &info->client->dev; int ret; if (opa_mode == RT9455_BOOST_MODE) { ret = rt9455_set_voreg_before_charge_mode(info); if (ret) { dev_err(dev, "Failed to set VOREG before entering charge mode\n"); return ret; } /* * If the charger is in boost mode, and it has received * USB_EVENT_NONE, this means the consumer device powered by the * charger is not connected anymore. * In this case, the charger goes into charge mode. */ dev_dbg(dev, "USB_EVENT_NONE received, therefore the charger goes into charge mode\n"); ret = regmap_field_write(info->regmap_fields[F_OPA_MODE], RT9455_CHARGE_MODE); if (ret) { dev_err(dev, "Failed to set charger in charge mode\n"); return NOTIFY_DONE; } } dev_dbg(dev, "USB_EVENT_NONE received, therefore IAICR is set to its minimum value\n"); if (iaicr != RT9455_IAICR_100MA) { ret = regmap_field_write(info->regmap_fields[F_IAICR], RT9455_IAICR_100MA); if (ret) { dev_err(dev, "Failed to set IAICR value\n"); return NOTIFY_DONE; } } return NOTIFY_OK; } static int rt9455_usb_event_vbus(struct rt9455_info *info, u8 opa_mode, u8 iaicr) { struct device *dev = &info->client->dev; int ret; if (opa_mode == RT9455_BOOST_MODE) { ret = rt9455_set_voreg_before_charge_mode(info); if (ret) { dev_err(dev, "Failed to set VOREG before entering charge mode\n"); return ret; } /* * If the charger is in boost mode, and it has received * USB_EVENT_VBUS, this means the consumer device powered by the * charger is not connected anymore. * In this case, the charger goes into charge mode. */ dev_dbg(dev, "USB_EVENT_VBUS received, therefore the charger goes into charge mode\n"); ret = regmap_field_write(info->regmap_fields[F_OPA_MODE], RT9455_CHARGE_MODE); if (ret) { dev_err(dev, "Failed to set charger in charge mode\n"); return NOTIFY_DONE; } } dev_dbg(dev, "USB_EVENT_VBUS received, therefore IAICR is set to 500 mA\n"); if (iaicr != RT9455_IAICR_500MA) { ret = regmap_field_write(info->regmap_fields[F_IAICR], RT9455_IAICR_500MA); if (ret) { dev_err(dev, "Failed to set IAICR value\n"); return NOTIFY_DONE; } } return NOTIFY_OK; } static int rt9455_usb_event_id(struct rt9455_info *info, u8 opa_mode, u8 iaicr) { struct device *dev = &info->client->dev; int ret; if (opa_mode == RT9455_CHARGE_MODE) { ret = rt9455_set_boost_voltage_before_boost_mode(info); if (ret) { dev_err(dev, "Failed to set boost output voltage before entering boost mode\n"); return ret; } /* * If the charger is in charge mode, and it has received * USB_EVENT_ID, this means a consumer device is connected and * it should be powered by the charger. * In this case, the charger goes into boost mode. */ dev_dbg(dev, "USB_EVENT_ID received, therefore the charger goes into boost mode\n"); ret = regmap_field_write(info->regmap_fields[F_OPA_MODE], RT9455_BOOST_MODE); if (ret) { dev_err(dev, "Failed to set charger in boost mode\n"); return NOTIFY_DONE; } } dev_dbg(dev, "USB_EVENT_ID received, therefore IAICR is set to its minimum value\n"); if (iaicr != RT9455_IAICR_100MA) { ret = regmap_field_write(info->regmap_fields[F_IAICR], RT9455_IAICR_100MA); if (ret) { dev_err(dev, "Failed to set IAICR value\n"); return NOTIFY_DONE; } } return NOTIFY_OK; } static int rt9455_usb_event_charger(struct rt9455_info *info, u8 opa_mode, u8 iaicr) { struct device *dev = &info->client->dev; int ret; if (opa_mode == RT9455_BOOST_MODE) { ret = rt9455_set_voreg_before_charge_mode(info); if (ret) { dev_err(dev, "Failed to set VOREG before entering charge mode\n"); return ret; } /* * If the charger is in boost mode, and it has received * USB_EVENT_CHARGER, this means the consumer device powered by * the charger is not connected anymore. * In this case, the charger goes into charge mode. */ dev_dbg(dev, "USB_EVENT_CHARGER received, therefore the charger goes into charge mode\n"); ret = regmap_field_write(info->regmap_fields[F_OPA_MODE], RT9455_CHARGE_MODE); if (ret) { dev_err(dev, "Failed to set charger in charge mode\n"); return NOTIFY_DONE; } } dev_dbg(dev, "USB_EVENT_CHARGER received, therefore IAICR is set to no current limit\n"); if (iaicr != RT9455_IAICR_NO_LIMIT) { ret = regmap_field_write(info->regmap_fields[F_IAICR], RT9455_IAICR_NO_LIMIT); if (ret) { dev_err(dev, "Failed to set IAICR value\n"); return NOTIFY_DONE; } } return NOTIFY_OK; } static int rt9455_usb_event(struct notifier_block *nb, unsigned long event, void *power) { struct rt9455_info *info = container_of(nb, struct rt9455_info, nb); struct device *dev = &info->client->dev; unsigned int opa_mode, iaicr; int ret; /* * Determine whether the charger is in charge mode * or in boost mode. */ ret = regmap_field_read(info->regmap_fields[F_OPA_MODE], &opa_mode); if (ret) { dev_err(dev, "Failed to read OPA_MODE value\n"); return NOTIFY_DONE; } ret = regmap_field_read(info->regmap_fields[F_IAICR], &iaicr); if (ret) { dev_err(dev, "Failed to read IAICR value\n"); return NOTIFY_DONE; } dev_dbg(dev, "Received USB event %lu\n", event); switch (event) { case USB_EVENT_NONE: return rt9455_usb_event_none(info, opa_mode, iaicr); case USB_EVENT_VBUS: return rt9455_usb_event_vbus(info, opa_mode, iaicr); case USB_EVENT_ID: return rt9455_usb_event_id(info, opa_mode, iaicr); case USB_EVENT_CHARGER: return rt9455_usb_event_charger(info, opa_mode, iaicr); default: dev_err(dev, "Unknown USB event\n"); } return NOTIFY_DONE; } #endif static void rt9455_pwr_rdy_work_callback(struct work_struct *work) { struct rt9455_info *info = container_of(work, struct rt9455_info, pwr_rdy_work.work); struct device *dev = &info->client->dev; unsigned int pwr_rdy; int ret; ret = regmap_field_read(info->regmap_fields[F_PWR_RDY], &pwr_rdy); if (ret) { dev_err(dev, "Failed to read PWR_RDY bit\n"); return; } switch (pwr_rdy) { case RT9455_PWR_FAULT: dev_dbg(dev, "Charger disconnected from power source\n"); cancel_delayed_work_sync(&info->max_charging_time_work); break; case RT9455_PWR_GOOD: dev_dbg(dev, "Charger connected to power source\n"); ret = regmap_field_write(info->regmap_fields[F_CHG_EN], RT9455_CHARGE_ENABLE); if (ret) { dev_err(dev, "Failed to enable charging\n"); return; } queue_delayed_work(system_power_efficient_wq, &info->max_charging_time_work, RT9455_MAX_CHARGING_TIME * HZ); break; } /* * Notify userspace that the charger has been either connected to or * disconnected from the power source. */ power_supply_changed(info->charger); } static void rt9455_max_charging_time_work_callback(struct work_struct *work) { struct rt9455_info *info = container_of(work, struct rt9455_info, max_charging_time_work.work); struct device *dev = &info->client->dev; int ret; dev_err(dev, "Battery has been charging for at least 6 hours and is not yet fully charged. Battery is dead, therefore charging is disabled.\n"); ret = regmap_field_write(info->regmap_fields[F_CHG_EN], RT9455_CHARGE_DISABLE); if (ret) dev_err(dev, "Failed to disable charging\n"); } static void rt9455_batt_presence_work_callback(struct work_struct *work) { struct rt9455_info *info = container_of(work, struct rt9455_info, batt_presence_work.work); struct device *dev = &info->client->dev; unsigned int irq1, mask1; int ret; ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &irq1); if (ret) { dev_err(dev, "Failed to read IRQ1 register\n"); return; } /* * If the battery is still absent, batt_presence_work is rescheduled. * Otherwise, max_charging_time is scheduled. */ if (irq1 & GET_MASK(F_BATAB)) { queue_delayed_work(system_power_efficient_wq, &info->batt_presence_work, RT9455_BATT_PRESENCE_DELAY * HZ); } else { queue_delayed_work(system_power_efficient_wq, &info->max_charging_time_work, RT9455_MAX_CHARGING_TIME * HZ); ret = regmap_read(info->regmap, RT9455_REG_MASK1, &mask1); if (ret) { dev_err(dev, "Failed to read MASK1 register\n"); return; } if (mask1 & GET_MASK(F_BATABM)) { ret = regmap_field_write(info->regmap_fields[F_BATABM], 0x00); if (ret) dev_err(dev, "Failed to unmask BATAB interrupt\n"); } /* * Notify userspace that the battery is now connected to the * charger. */ power_supply_changed(info->charger); } } static const struct power_supply_desc rt9455_charger_desc = { .name = RT9455_DRIVER_NAME, .type = POWER_SUPPLY_TYPE_USB, .properties = rt9455_charger_properties, .num_properties = ARRAY_SIZE(rt9455_charger_properties), .get_property = rt9455_charger_get_property, }; static bool rt9455_is_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { case RT9455_REG_DEV_ID: case RT9455_REG_IRQ1: case RT9455_REG_IRQ2: case RT9455_REG_IRQ3: return false; default: return true; } } static bool rt9455_is_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case RT9455_REG_DEV_ID: case RT9455_REG_CTRL5: case RT9455_REG_CTRL6: return false; default: return true; } } static const struct regmap_config rt9455_regmap_config = { .reg_bits = 8, .val_bits = 8, .writeable_reg = rt9455_is_writeable_reg, .volatile_reg = rt9455_is_volatile_reg, .max_register = RT9455_REG_MASK3, .cache_type = REGCACHE_RBTREE, }; static int rt9455_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); struct device *dev = &client->dev; struct rt9455_info *info; struct power_supply_config rt9455_charger_config = {}; /* * Mandatory device-specific data values. Also, VOREG and boost output * voltage are mandatory values, but they are stored in rt9455_info * structure. */ u32 ichrg, ieoc_percentage; /* Optional device-specific data values. */ u32 mivr = -1, iaicr = -1; int i, ret; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_err(dev, "No support for SMBUS_BYTE_DATA\n"); return -ENODEV; } info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; info->client = client; i2c_set_clientdata(client, info); info->regmap = devm_regmap_init_i2c(client, &rt9455_regmap_config); if (IS_ERR(info->regmap)) { dev_err(dev, "Failed to initialize register map\n"); return -EINVAL; } for (i = 0; i < F_MAX_FIELDS; i++) { info->regmap_fields[i] = devm_regmap_field_alloc(dev, info->regmap, rt9455_reg_fields[i]); if (IS_ERR(info->regmap_fields[i])) { dev_err(dev, "Failed to allocate regmap field = %d\n", i); return PTR_ERR(info->regmap_fields[i]); } } ret = rt9455_discover_charger(info, &ichrg, &ieoc_percentage, &mivr, &iaicr); if (ret) { dev_err(dev, "Failed to discover charger\n"); return ret; } #if IS_ENABLED(CONFIG_USB_PHY) info->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); if (IS_ERR(info->usb_phy)) { dev_err(dev, "Failed to get USB transceiver\n"); } else { info->nb.notifier_call = rt9455_usb_event; ret = usb_register_notifier(info->usb_phy, &info->nb); if (ret) { dev_err(dev, "Failed to register USB notifier\n"); /* * If usb_register_notifier() fails, set notifier_call * to NULL, to avoid calling usb_unregister_notifier(). */ info->nb.notifier_call = NULL; } } #endif INIT_DEFERRABLE_WORK(&info->pwr_rdy_work, rt9455_pwr_rdy_work_callback); INIT_DEFERRABLE_WORK(&info->max_charging_time_work, rt9455_max_charging_time_work_callback); INIT_DEFERRABLE_WORK(&info->batt_presence_work, rt9455_batt_presence_work_callback); rt9455_charger_config.of_node = dev->of_node; rt9455_charger_config.drv_data = info; rt9455_charger_config.supplied_to = rt9455_charger_supplied_to; rt9455_charger_config.num_supplicants = ARRAY_SIZE(rt9455_charger_supplied_to); ret = devm_request_threaded_irq(dev, client->irq, NULL, rt9455_irq_handler_thread, IRQF_TRIGGER_LOW | IRQF_ONESHOT, RT9455_DRIVER_NAME, info); if (ret) { dev_err(dev, "Failed to register IRQ handler\n"); goto put_usb_notifier; } ret = rt9455_hw_init(info, ichrg, ieoc_percentage, mivr, iaicr); if (ret) { dev_err(dev, "Failed to set charger to its default values\n"); goto put_usb_notifier; } info->charger = devm_power_supply_register(dev, &rt9455_charger_desc, &rt9455_charger_config); if (IS_ERR(info->charger)) { dev_err(dev, "Failed to register charger\n"); ret = PTR_ERR(info->charger); goto put_usb_notifier; } return 0; put_usb_notifier: #if IS_ENABLED(CONFIG_USB_PHY) if (info->nb.notifier_call) { usb_unregister_notifier(info->usb_phy, &info->nb); info->nb.notifier_call = NULL; } #endif return ret; } static int rt9455_remove(struct i2c_client *client) { int ret; struct rt9455_info *info = i2c_get_clientdata(client); ret = rt9455_register_reset(info); if (ret) dev_err(&info->client->dev, "Failed to set charger to its default values\n"); #if IS_ENABLED(CONFIG_USB_PHY) if (info->nb.notifier_call) usb_unregister_notifier(info->usb_phy, &info->nb); #endif cancel_delayed_work_sync(&info->pwr_rdy_work); cancel_delayed_work_sync(&info->max_charging_time_work); cancel_delayed_work_sync(&info->batt_presence_work); return ret; } static const struct i2c_device_id rt9455_i2c_id_table[] = { { RT9455_DRIVER_NAME, 0 }, { }, }; MODULE_DEVICE_TABLE(i2c, rt9455_i2c_id_table); static const struct of_device_id rt9455_of_match[] = { { .compatible = "richtek,rt9455", }, { }, }; MODULE_DEVICE_TABLE(of, rt9455_of_match); static const struct acpi_device_id rt9455_i2c_acpi_match[] = { { "RT945500", 0 }, { } }; MODULE_DEVICE_TABLE(acpi, rt9455_i2c_acpi_match); static struct i2c_driver rt9455_driver = { .probe = rt9455_probe, .remove = rt9455_remove, .id_table = rt9455_i2c_id_table, .driver = { .name = RT9455_DRIVER_NAME, .of_match_table = of_match_ptr(rt9455_of_match), .acpi_match_table = ACPI_PTR(rt9455_i2c_acpi_match), }, }; module_i2c_driver(rt9455_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Anda-Maria Nicolae <anda-maria.nicolae@intel.com>"); MODULE_DESCRIPTION("Richtek RT9455 Charger Driver");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1