/* * bq2415x charger driver * * Copyright (C) 2011-2013 Pali Rohár * * 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. * * Datasheets: * http://www.ti.com/product/bq24150 * http://www.ti.com/product/bq24150a * http://www.ti.com/product/bq24152 * http://www.ti.com/product/bq24153 * http://www.ti.com/product/bq24153a * http://www.ti.com/product/bq24155 * http://www.ti.com/product/bq24157s * http://www.ti.com/product/bq24158 */ #include #include #include #include #include #include #include #include #include #include #include #include /* timeout for resetting chip timer */ #define BQ2415X_TIMER_TIMEOUT 10 #define BQ2415X_REG_STATUS 0x00 #define BQ2415X_REG_CONTROL 0x01 #define BQ2415X_REG_VOLTAGE 0x02 #define BQ2415X_REG_VENDER 0x03 #define BQ2415X_REG_CURRENT 0x04 /* reset state for all registers */ #define BQ2415X_RESET_STATUS BIT(6) #define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5)) #define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3)) #define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7)) /* status register */ #define BQ2415X_BIT_TMR_RST 7 #define BQ2415X_BIT_OTG 7 #define BQ2415X_BIT_EN_STAT 6 #define BQ2415X_MASK_STAT (BIT(4)|BIT(5)) #define BQ2415X_SHIFT_STAT 4 #define BQ2415X_BIT_BOOST 3 #define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2)) #define BQ2415X_SHIFT_FAULT 0 /* control register */ #define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7)) #define BQ2415X_SHIFT_LIMIT 6 #define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5)) #define BQ2415X_SHIFT_VLOWV 4 #define BQ2415X_BIT_TE 3 #define BQ2415X_BIT_CE 2 #define BQ2415X_BIT_HZ_MODE 1 #define BQ2415X_BIT_OPA_MODE 0 /* voltage register */ #define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7)) #define BQ2415X_SHIFT_VO 2 #define BQ2415X_BIT_OTG_PL 1 #define BQ2415X_BIT_OTG_EN 0 /* vender register */ #define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7)) #define BQ2415X_SHIFT_VENDER 5 #define BQ2415X_MASK_PN (BIT(3)|BIT(4)) #define BQ2415X_SHIFT_PN 3 #define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2)) #define BQ2415X_SHIFT_REVISION 0 /* current register */ #define BQ2415X_MASK_RESET BIT(7) #define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6)) #define BQ2415X_SHIFT_VI_CHRG 4 /* N/A BIT(3) */ #define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2)) #define BQ2415X_SHIFT_VI_TERM 0 enum bq2415x_command { BQ2415X_TIMER_RESET, BQ2415X_OTG_STATUS, BQ2415X_STAT_PIN_STATUS, BQ2415X_STAT_PIN_ENABLE, BQ2415X_STAT_PIN_DISABLE, BQ2415X_CHARGE_STATUS, BQ2415X_BOOST_STATUS, BQ2415X_FAULT_STATUS, BQ2415X_CHARGE_TERMINATION_STATUS, BQ2415X_CHARGE_TERMINATION_ENABLE, BQ2415X_CHARGE_TERMINATION_DISABLE, BQ2415X_CHARGER_STATUS, BQ2415X_CHARGER_ENABLE, BQ2415X_CHARGER_DISABLE, BQ2415X_HIGH_IMPEDANCE_STATUS, BQ2415X_HIGH_IMPEDANCE_ENABLE, BQ2415X_HIGH_IMPEDANCE_DISABLE, BQ2415X_BOOST_MODE_STATUS, BQ2415X_BOOST_MODE_ENABLE, BQ2415X_BOOST_MODE_DISABLE, BQ2415X_OTG_LEVEL, BQ2415X_OTG_ACTIVATE_HIGH, BQ2415X_OTG_ACTIVATE_LOW, BQ2415X_OTG_PIN_STATUS, BQ2415X_OTG_PIN_ENABLE, BQ2415X_OTG_PIN_DISABLE, BQ2415X_VENDER_CODE, BQ2415X_PART_NUMBER, BQ2415X_REVISION, }; enum bq2415x_chip { BQUNKNOWN, BQ24150, BQ24150A, BQ24151, BQ24151A, BQ24152, BQ24153, BQ24153A, BQ24155, BQ24156, BQ24156A, BQ24157S, BQ24158, }; static char *bq2415x_chip_name[] = { "unknown", "bq24150", "bq24150a", "bq24151", "bq24151a", "bq24152", "bq24153", "bq24153a", "bq24155", "bq24156", "bq24156a", "bq24157s", "bq24158", }; struct bq2415x_device { struct device *dev; struct bq2415x_platform_data init_data; struct power_supply *charger; struct power_supply_desc charger_desc; struct delayed_work work; struct power_supply *notify_psy; struct notifier_block nb; enum bq2415x_mode reported_mode;/* mode reported by hook function */ enum bq2415x_mode mode; /* currently configured mode */ enum bq2415x_chip chip; const char *timer_error; char *model; char *name; int autotimer; /* 1 - if driver automatically reset timer, 0 - not */ int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */ int id; }; /* each registered chip must have unique id */ static DEFINE_IDR(bq2415x_id); static DEFINE_MUTEX(bq2415x_id_mutex); static DEFINE_MUTEX(bq2415x_timer_mutex); static DEFINE_MUTEX(bq2415x_i2c_mutex); /**** i2c read functions ****/ /* read value from register */ static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg) { struct i2c_client *client = to_i2c_client(bq->dev); struct i2c_msg msg[2]; u8 val; int ret; if (!client->adapter) return -ENODEV; msg[0].addr = client->addr; msg[0].flags = 0; msg[0].buf = ® msg[0].len = sizeof(reg); msg[1].addr = client->addr; msg[1].flags = I2C_M_RD; msg[1].buf = &val; msg[1].len = sizeof(val); mutex_lock(&bq2415x_i2c_mutex); ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); mutex_unlock(&bq2415x_i2c_mutex); if (ret < 0) return ret; return val; } /* read value from register, apply mask and right shift it */ static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg, u8 mask, u8 shift) { int ret; if (shift > 8) return -EINVAL; ret = bq2415x_i2c_read(bq, reg); if (ret < 0) return ret; return (ret & mask) >> shift; } /* read value from register and return one specified bit */ static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit) { if (bit > 8) return -EINVAL; return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit); } /**** i2c write functions ****/ /* write value to register */ static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val) { struct i2c_client *client = to_i2c_client(bq->dev); struct i2c_msg msg[1]; u8 data[2]; int ret; data[0] = reg; data[1] = val; msg[0].addr = client->addr; msg[0].flags = 0; msg[0].buf = data; msg[0].len = ARRAY_SIZE(data); mutex_lock(&bq2415x_i2c_mutex); ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); mutex_unlock(&bq2415x_i2c_mutex); /* i2c_transfer returns number of messages transferred */ if (ret < 0) return ret; else if (ret != 1) return -EIO; return 0; } /* read value from register, change it with mask left shifted and write back */ static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val, u8 mask, u8 shift) { int ret; if (shift > 8) return -EINVAL; ret = bq2415x_i2c_read(bq, reg); if (ret < 0) return ret; ret &= ~mask; ret |= val << shift; return bq2415x_i2c_write(bq, reg, ret); } /* change only one bit in register */ static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg, bool val, u8 bit) { if (bit > 8) return -EINVAL; return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit); } /**** global functions ****/ /* exec command function */ static int bq2415x_exec_command(struct bq2415x_device *bq, enum bq2415x_command command) { int ret; switch (command) { case BQ2415X_TIMER_RESET: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1, BQ2415X_BIT_TMR_RST); case BQ2415X_OTG_STATUS: return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, BQ2415X_BIT_OTG); case BQ2415X_STAT_PIN_STATUS: return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, BQ2415X_BIT_EN_STAT); case BQ2415X_STAT_PIN_ENABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1, BQ2415X_BIT_EN_STAT); case BQ2415X_STAT_PIN_DISABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0, BQ2415X_BIT_EN_STAT); case BQ2415X_CHARGE_STATUS: return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT); case BQ2415X_BOOST_STATUS: return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, BQ2415X_BIT_BOOST); case BQ2415X_FAULT_STATUS: return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT); case BQ2415X_CHARGE_TERMINATION_STATUS: return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, BQ2415X_BIT_TE); case BQ2415X_CHARGE_TERMINATION_ENABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 1, BQ2415X_BIT_TE); case BQ2415X_CHARGE_TERMINATION_DISABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 0, BQ2415X_BIT_TE); case BQ2415X_CHARGER_STATUS: ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, BQ2415X_BIT_CE); if (ret < 0) return ret; return ret > 0 ? 0 : 1; case BQ2415X_CHARGER_ENABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 0, BQ2415X_BIT_CE); case BQ2415X_CHARGER_DISABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 1, BQ2415X_BIT_CE); case BQ2415X_HIGH_IMPEDANCE_STATUS: return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, BQ2415X_BIT_HZ_MODE); case BQ2415X_HIGH_IMPEDANCE_ENABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 1, BQ2415X_BIT_HZ_MODE); case BQ2415X_HIGH_IMPEDANCE_DISABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 0, BQ2415X_BIT_HZ_MODE); case BQ2415X_BOOST_MODE_STATUS: return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, BQ2415X_BIT_OPA_MODE); case BQ2415X_BOOST_MODE_ENABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 1, BQ2415X_BIT_OPA_MODE); case BQ2415X_BOOST_MODE_DISABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 0, BQ2415X_BIT_OPA_MODE); case BQ2415X_OTG_LEVEL: return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, BQ2415X_BIT_OTG_PL); case BQ2415X_OTG_ACTIVATE_HIGH: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, 1, BQ2415X_BIT_OTG_PL); case BQ2415X_OTG_ACTIVATE_LOW: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, 0, BQ2415X_BIT_OTG_PL); case BQ2415X_OTG_PIN_STATUS: return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, BQ2415X_BIT_OTG_EN); case BQ2415X_OTG_PIN_ENABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, 1, BQ2415X_BIT_OTG_EN); case BQ2415X_OTG_PIN_DISABLE: return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, 0, BQ2415X_BIT_OTG_EN); case BQ2415X_VENDER_CODE: return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER); case BQ2415X_PART_NUMBER: return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, BQ2415X_MASK_PN, BQ2415X_SHIFT_PN); case BQ2415X_REVISION: return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION); } return -EINVAL; } /* detect chip type */ static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq) { struct i2c_client *client = to_i2c_client(bq->dev); int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER); if (ret < 0) return ret; switch (client->addr) { case 0x6b: switch (ret) { case 0: if (bq->chip == BQ24151A) return bq->chip; return BQ24151; case 1: if (bq->chip == BQ24150A || bq->chip == BQ24152 || bq->chip == BQ24155) return bq->chip; return BQ24150; case 2: if (bq->chip == BQ24153A) return bq->chip; return BQ24153; default: return BQUNKNOWN; } break; case 0x6a: switch (ret) { case 0: if (bq->chip == BQ24156A) return bq->chip; return BQ24156; case 2: if (bq->chip == BQ24157S) return bq->chip; return BQ24158; default: return BQUNKNOWN; } break; } return BQUNKNOWN; } /* detect chip revision */ static int bq2415x_detect_revision(struct bq2415x_device *bq) { int ret = bq2415x_exec_command(bq, BQ2415X_REVISION); int chip = bq2415x_detect_chip(bq); if (ret < 0 || chip < 0) return -1; switch (chip) { case BQ24150: case BQ24150A: case BQ24151: case BQ24151A: case BQ24152: if (ret >= 0 && ret <= 3) return ret; return -1; case BQ24153: case BQ24153A: case BQ24156: case BQ24156A: case BQ24157S: case BQ24158: if (ret == 3) return 0; else if (ret == 1) return 1; return -1; case BQ24155: if (ret == 3) return 3; return -1; case BQUNKNOWN: return -1; } return -1; } /* return chip vender code */ static int bq2415x_get_vender_code(struct bq2415x_device *bq) { int ret; ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE); if (ret < 0) return 0; /* convert to binary */ return (ret & 0x1) + ((ret >> 1) & 0x1) * 10 + ((ret >> 2) & 0x1) * 100; } /* reset all chip registers to default state */ static void bq2415x_reset_chip(struct bq2415x_device *bq) { bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT); bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE); bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL); bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS); bq->timer_error = NULL; } /**** properties functions ****/ /* set current limit in mA */ static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA) { int val; if (mA <= 100) val = 0; else if (mA <= 500) val = 1; else if (mA <= 800) val = 2; else val = 3; return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT); } /* get current limit in mA */ static int bq2415x_get_current_limit(struct bq2415x_device *bq) { int ret; ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT); if (ret < 0) return ret; else if (ret == 0) return 100; else if (ret == 1) return 500; else if (ret == 2) return 800; else if (ret == 3) return 1800; return -EINVAL; } /* set weak battery voltage in mV */ static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV) { int val; /* round to 100mV */ if (mV <= 3400 + 50) val = 0; else if (mV <= 3500 + 50) val = 1; else if (mV <= 3600 + 50) val = 2; else val = 3; return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV); } /* get weak battery voltage in mV */ static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq) { int ret; ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV); if (ret < 0) return ret; return 100 * (34 + ret); } /* set battery regulation voltage in mV */ static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq, int mV) { int val = (mV/10 - 350) / 2; /* * According to datasheet, maximum battery regulation voltage is * 4440mV which is b101111 = 47. */ if (val < 0) val = 0; else if (val > 47) return -EINVAL; return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val, BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); } /* get battery regulation voltage in mV */ static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq) { int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE, BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); if (ret < 0) return ret; return 10 * (350 + 2*ret); } /* set charge current in mA (platform data must provide resistor sense) */ static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA) { int val; if (bq->init_data.resistor_sense <= 0) return -ENOSYS; val = (mA * bq->init_data.resistor_sense - 37400) / 6800; if (val < 0) val = 0; else if (val > 7) val = 7; return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val, BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET, BQ2415X_SHIFT_VI_CHRG); } /* get charge current in mA (platform data must provide resistor sense) */ static int bq2415x_get_charge_current(struct bq2415x_device *bq) { int ret; if (bq->init_data.resistor_sense <= 0) return -ENOSYS; ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT, BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG); if (ret < 0) return ret; return (37400 + 6800*ret) / bq->init_data.resistor_sense; } /* set termination current in mA (platform data must provide resistor sense) */ static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA) { int val; if (bq->init_data.resistor_sense <= 0) return -ENOSYS; val = (mA * bq->init_data.resistor_sense - 3400) / 3400; if (val < 0) val = 0; else if (val > 7) val = 7; return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val, BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET, BQ2415X_SHIFT_VI_TERM); } /* get termination current in mA (platform data must provide resistor sense) */ static int bq2415x_get_termination_current(struct bq2415x_device *bq) { int ret; if (bq->init_data.resistor_sense <= 0) return -ENOSYS; ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT, BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM); if (ret < 0) return ret; return (3400 + 3400*ret) / bq->init_data.resistor_sense; } /* set default value of property */ #define bq2415x_set_default_value(bq, prop) \ do { \ int ret = 0; \ if (bq->init_data.prop != -1) \ ret = bq2415x_set_##prop(bq, bq->init_data.prop); \ if (ret < 0) \ return ret; \ } while (0) /* set default values of all properties */ static int bq2415x_set_defaults(struct bq2415x_device *bq) { bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE); bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE); bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE); bq2415x_set_default_value(bq, current_limit); bq2415x_set_default_value(bq, weak_battery_voltage); bq2415x_set_default_value(bq, battery_regulation_voltage); if (bq->init_data.resistor_sense > 0) { bq2415x_set_default_value(bq, charge_current); bq2415x_set_default_value(bq, termination_current); bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE); } bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE); return 0; } /**** charger mode functions ****/ /* set charger mode */ static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode) { int ret = 0; int charger = 0; int boost = 0; if (mode == BQ2415X_MODE_BOOST) boost = 1; else if (mode != BQ2415X_MODE_OFF) charger = 1; if (!charger) ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE); if (!boost) ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE); if (ret < 0) return ret; switch (mode) { case BQ2415X_MODE_OFF: dev_dbg(bq->dev, "changing mode to: Offline\n"); ret = bq2415x_set_current_limit(bq, 100); break; case BQ2415X_MODE_NONE: dev_dbg(bq->dev, "changing mode to: N/A\n"); ret = bq2415x_set_current_limit(bq, 100); break; case BQ2415X_MODE_HOST_CHARGER: dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n"); ret = bq2415x_set_current_limit(bq, 500); break; case BQ2415X_MODE_DEDICATED_CHARGER: dev_dbg(bq->dev, "changing mode to: Dedicated charger\n"); ret = bq2415x_set_current_limit(bq, 1800); break; case BQ2415X_MODE_BOOST: /* Boost mode */ dev_dbg(bq->dev, "changing mode to: Boost\n"); ret = bq2415x_set_current_limit(bq, 100); break; } if (ret < 0) return ret; if (charger) ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE); else if (boost) ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE); if (ret < 0) return ret; bq2415x_set_default_value(bq, weak_battery_voltage); bq2415x_set_default_value(bq, battery_regulation_voltage); bq->mode = mode; sysfs_notify(&bq->charger->dev.kobj, NULL, "mode"); return 0; } static int bq2415x_notifier_call(struct notifier_block *nb, unsigned long val, void *v) { struct bq2415x_device *bq = container_of(nb, struct bq2415x_device, nb); struct power_supply *psy = v; enum bq2415x_mode mode; union power_supply_propval prop; int ret; int mA; if (val != PSY_EVENT_PROP_CHANGED) return NOTIFY_OK; if (psy != bq->notify_psy) return NOTIFY_OK; dev_dbg(bq->dev, "notifier call was called\n"); ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX, &prop); if (ret != 0) return NOTIFY_OK; mA = prop.intval; if (mA == 0) mode = BQ2415X_MODE_OFF; else if (mA < 500) mode = BQ2415X_MODE_NONE; else if (mA < 1800) mode = BQ2415X_MODE_HOST_CHARGER; else mode = BQ2415X_MODE_DEDICATED_CHARGER; if (bq->reported_mode == mode) return NOTIFY_OK; bq->reported_mode = mode; /* if automode is not enabled do not tell about reported_mode */ if (bq->automode < 1) return NOTIFY_OK; schedule_delayed_work(&bq->work, 0); return NOTIFY_OK; } /**** timer functions ****/ /* enable/disable auto resetting chip timer */ static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state) { mutex_lock(&bq2415x_timer_mutex); if (bq->autotimer == state) { mutex_unlock(&bq2415x_timer_mutex); return; } bq->autotimer = state; if (state) { schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ); bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); bq->timer_error = NULL; } else { cancel_delayed_work_sync(&bq->work); } mutex_unlock(&bq2415x_timer_mutex); } /* called by bq2415x_timer_work on timer error */ static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg) { bq->timer_error = msg; sysfs_notify(&bq->charger->dev.kobj, NULL, "timer"); dev_err(bq->dev, "%s\n", msg); if (bq->automode > 0) bq->automode = 0; bq2415x_set_mode(bq, BQ2415X_MODE_OFF); bq2415x_set_autotimer(bq, 0); } /* delayed work function for auto resetting chip timer */ static void bq2415x_timer_work(struct work_struct *work) { struct bq2415x_device *bq = container_of(work, struct bq2415x_device, work.work); int ret; int error; int boost; if (bq->automode > 0 && (bq->reported_mode != bq->mode)) { sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode"); bq2415x_set_mode(bq, bq->reported_mode); } if (!bq->autotimer) return; ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); if (ret < 0) { bq2415x_timer_error(bq, "Resetting timer failed"); return; } boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS); if (boost < 0) { bq2415x_timer_error(bq, "Unknown error"); return; } error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS); if (error < 0) { bq2415x_timer_error(bq, "Unknown error"); return; } if (boost) { switch (error) { /* Non fatal errors, chip is OK */ case 0: /* No error */ break; case 6: /* Timer expired */ dev_err(bq->dev, "Timer expired\n"); break; case 3: /* Battery voltage too low */ dev_err(bq->dev, "Battery voltage to low\n"); break; /* Fatal errors, disable and reset chip */ case 1: /* Overvoltage protection (chip fried) */ bq2415x_timer_error(bq, "Overvoltage protection (chip fried)"); return; case 2: /* Overload */ bq2415x_timer_error(bq, "Overload"); return; case 4: /* Battery overvoltage protection */ bq2415x_timer_error(bq, "Battery overvoltage protection"); return; case 5: /* Thermal shutdown (too hot) */ bq2415x_timer_error(bq, "Thermal shutdown (too hot)"); return; case 7: /* N/A */ bq2415x_timer_error(bq, "Unknown error"); return; } } else { switch (error) { /* Non fatal errors, chip is OK */ case 0: /* No error */ break; case 2: /* Sleep mode */ dev_err(bq->dev, "Sleep mode\n"); break; case 3: /* Poor input source */ dev_err(bq->dev, "Poor input source\n"); break; case 6: /* Timer expired */ dev_err(bq->dev, "Timer expired\n"); break; case 7: /* No battery */ dev_err(bq->dev, "No battery\n"); break; /* Fatal errors, disable and reset chip */ case 1: /* Overvoltage protection (chip fried) */ bq2415x_timer_error(bq, "Overvoltage protection (chip fried)"); return; case 4: /* Battery overvoltage protection */ bq2415x_timer_error(bq, "Battery overvoltage protection"); return; case 5: /* Thermal shutdown (too hot) */ bq2415x_timer_error(bq, "Thermal shutdown (too hot)"); return; } } schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ); } /**** power supply interface code ****/ static enum power_supply_property bq2415x_power_supply_props[] = { /* TODO: maybe add more power supply properties */ POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_MODEL_NAME, }; static int bq2415x_power_supply_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct bq2415x_device *bq = power_supply_get_drvdata(psy); int ret; switch (psp) { case POWER_SUPPLY_PROP_STATUS: ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS); if (ret < 0) return ret; else if (ret == 0) /* Ready */ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (ret == 1) /* Charge in progress */ val->intval = POWER_SUPPLY_STATUS_CHARGING; else if (ret == 2) /* Charge done */ val->intval = POWER_SUPPLY_STATUS_FULL; else val->intval = POWER_SUPPLY_STATUS_UNKNOWN; break; case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = bq->model; break; default: return -EINVAL; } return 0; } static int bq2415x_power_supply_init(struct bq2415x_device *bq) { int ret; int chip; char revstr[8]; struct power_supply_config psy_cfg = { .drv_data = bq, }; bq->charger_desc.name = bq->name; bq->charger_desc.type = POWER_SUPPLY_TYPE_USB; bq->charger_desc.properties = bq2415x_power_supply_props; bq->charger_desc.num_properties = ARRAY_SIZE(bq2415x_power_supply_props); bq->charger_desc.get_property = bq2415x_power_supply_get_property; ret = bq2415x_detect_chip(bq); if (ret < 0) chip = BQUNKNOWN; else chip = ret; ret = bq2415x_detect_revision(bq); if (ret < 0) strcpy(revstr, "unknown"); else sprintf(revstr, "1.%d", ret); bq->model = kasprintf(GFP_KERNEL, "chip %s, revision %s, vender code %.3d", bq2415x_chip_name[chip], revstr, bq2415x_get_vender_code(bq)); if (!bq->model) { dev_err(bq->dev, "failed to allocate model name\n"); return -ENOMEM; } bq->charger = power_supply_register(bq->dev, &bq->charger_desc, &psy_cfg); if (IS_ERR(bq->charger)) { kfree(bq->model); return PTR_ERR(bq->charger); } return 0; } static void bq2415x_power_supply_exit(struct bq2415x_device *bq) { bq->autotimer = 0; if (bq->automode > 0) bq->automode = 0; cancel_delayed_work_sync(&bq->work); power_supply_unregister(bq->charger); kfree(bq->model); } /**** additional sysfs entries for power supply interface ****/ /* show *_status entries */ static ssize_t bq2415x_sysfs_show_status(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); enum bq2415x_command command; int ret; if (strcmp(attr->attr.name, "otg_status") == 0) command = BQ2415X_OTG_STATUS; else if (strcmp(attr->attr.name, "charge_status") == 0) command = BQ2415X_CHARGE_STATUS; else if (strcmp(attr->attr.name, "boost_status") == 0) command = BQ2415X_BOOST_STATUS; else if (strcmp(attr->attr.name, "fault_status") == 0) command = BQ2415X_FAULT_STATUS; else return -EINVAL; ret = bq2415x_exec_command(bq, command); if (ret < 0) return ret; return sprintf(buf, "%d\n", ret); } /* * set timer entry: * auto - enable auto mode * off - disable auto mode * (other values) - reset chip timer */ static ssize_t bq2415x_sysfs_set_timer(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); int ret = 0; if (strncmp(buf, "auto", 4) == 0) bq2415x_set_autotimer(bq, 1); else if (strncmp(buf, "off", 3) == 0) bq2415x_set_autotimer(bq, 0); else ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); if (ret < 0) return ret; return count; } /* show timer entry (auto or off) */ static ssize_t bq2415x_sysfs_show_timer(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); if (bq->timer_error) return sprintf(buf, "%s\n", bq->timer_error); if (bq->autotimer) return sprintf(buf, "auto\n"); return sprintf(buf, "off\n"); } /* * set mode entry: * auto - if automode is supported, enable it and set mode to reported * none - disable charger and boost mode * host - charging mode for host/hub chargers (current limit 500mA) * dedicated - charging mode for dedicated chargers (unlimited current limit) * boost - disable charger and enable boost mode */ static ssize_t bq2415x_sysfs_set_mode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); enum bq2415x_mode mode; int ret = 0; if (strncmp(buf, "auto", 4) == 0) { if (bq->automode < 0) return -ENOSYS; bq->automode = 1; mode = bq->reported_mode; } else if (strncmp(buf, "off", 3) == 0) { if (bq->automode > 0) bq->automode = 0; mode = BQ2415X_MODE_OFF; } else if (strncmp(buf, "none", 4) == 0) { if (bq->automode > 0) bq->automode = 0; mode = BQ2415X_MODE_NONE; } else if (strncmp(buf, "host", 4) == 0) { if (bq->automode > 0) bq->automode = 0; mode = BQ2415X_MODE_HOST_CHARGER; } else if (strncmp(buf, "dedicated", 9) == 0) { if (bq->automode > 0) bq->automode = 0; mode = BQ2415X_MODE_DEDICATED_CHARGER; } else if (strncmp(buf, "boost", 5) == 0) { if (bq->automode > 0) bq->automode = 0; mode = BQ2415X_MODE_BOOST; } else if (strncmp(buf, "reset", 5) == 0) { bq2415x_reset_chip(bq); bq2415x_set_defaults(bq); if (bq->automode <= 0) return count; bq->automode = 1; mode = bq->reported_mode; } else { return -EINVAL; } ret = bq2415x_set_mode(bq, mode); if (ret < 0) return ret; return count; } /* show mode entry (auto, none, host, dedicated or boost) */ static ssize_t bq2415x_sysfs_show_mode(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); ssize_t ret = 0; if (bq->automode > 0) ret += sprintf(buf+ret, "auto ("); switch (bq->mode) { case BQ2415X_MODE_OFF: ret += sprintf(buf+ret, "off"); break; case BQ2415X_MODE_NONE: ret += sprintf(buf+ret, "none"); break; case BQ2415X_MODE_HOST_CHARGER: ret += sprintf(buf+ret, "host"); break; case BQ2415X_MODE_DEDICATED_CHARGER: ret += sprintf(buf+ret, "dedicated"); break; case BQ2415X_MODE_BOOST: ret += sprintf(buf+ret, "boost"); break; } if (bq->automode > 0) ret += sprintf(buf+ret, ")"); ret += sprintf(buf+ret, "\n"); return ret; } /* show reported_mode entry (none, host, dedicated or boost) */ static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); if (bq->automode < 0) return -EINVAL; switch (bq->reported_mode) { case BQ2415X_MODE_OFF: return sprintf(buf, "off\n"); case BQ2415X_MODE_NONE: return sprintf(buf, "none\n"); case BQ2415X_MODE_HOST_CHARGER: return sprintf(buf, "host\n"); case BQ2415X_MODE_DEDICATED_CHARGER: return sprintf(buf, "dedicated\n"); case BQ2415X_MODE_BOOST: return sprintf(buf, "boost\n"); } return -EINVAL; } /* directly set raw value to chip register, format: 'register value' */ static ssize_t bq2415x_sysfs_set_registers(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); ssize_t ret = 0; unsigned int reg; unsigned int val; if (sscanf(buf, "%x %x", ®, &val) != 2) return -EINVAL; if (reg > 4 || val > 255) return -EINVAL; ret = bq2415x_i2c_write(bq, reg, val); if (ret < 0) return ret; return count; } /* print value of chip register, format: 'register=value' */ static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq, u8 reg, char *buf) { int ret = bq2415x_i2c_read(bq, reg); if (ret < 0) return sprintf(buf, "%#.2x=error %d\n", reg, ret); return sprintf(buf, "%#.2x=%#.2x\n", reg, ret); } /* show all raw values of chip register, format per line: 'register=value' */ static ssize_t bq2415x_sysfs_show_registers(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); ssize_t ret = 0; ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret); ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret); ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret); ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret); ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret); return ret; } /* set current and voltage limit entries (in mA or mV) */ static ssize_t bq2415x_sysfs_set_limit(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); long val; int ret; if (kstrtol(buf, 10, &val) < 0) return -EINVAL; if (strcmp(attr->attr.name, "current_limit") == 0) ret = bq2415x_set_current_limit(bq, val); else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0) ret = bq2415x_set_weak_battery_voltage(bq, val); else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0) ret = bq2415x_set_battery_regulation_voltage(bq, val); else if (strcmp(attr->attr.name, "charge_current") == 0) ret = bq2415x_set_charge_current(bq, val); else if (strcmp(attr->attr.name, "termination_current") == 0) ret = bq2415x_set_termination_current(bq, val); else return -EINVAL; if (ret < 0) return ret; return count; } /* show current and voltage limit entries (in mA or mV) */ static ssize_t bq2415x_sysfs_show_limit(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); int ret; if (strcmp(attr->attr.name, "current_limit") == 0) ret = bq2415x_get_current_limit(bq); else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0) ret = bq2415x_get_weak_battery_voltage(bq); else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0) ret = bq2415x_get_battery_regulation_voltage(bq); else if (strcmp(attr->attr.name, "charge_current") == 0) ret = bq2415x_get_charge_current(bq); else if (strcmp(attr->attr.name, "termination_current") == 0) ret = bq2415x_get_termination_current(bq); else return -EINVAL; if (ret < 0) return ret; return sprintf(buf, "%d\n", ret); } /* set *_enable entries */ static ssize_t bq2415x_sysfs_set_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); enum bq2415x_command command; long val; int ret; if (kstrtol(buf, 10, &val) < 0) return -EINVAL; if (strcmp(attr->attr.name, "charge_termination_enable") == 0) command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE : BQ2415X_CHARGE_TERMINATION_DISABLE; else if (strcmp(attr->attr.name, "high_impedance_enable") == 0) command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE : BQ2415X_HIGH_IMPEDANCE_DISABLE; else if (strcmp(attr->attr.name, "otg_pin_enable") == 0) command = val ? BQ2415X_OTG_PIN_ENABLE : BQ2415X_OTG_PIN_DISABLE; else if (strcmp(attr->attr.name, "stat_pin_enable") == 0) command = val ? BQ2415X_STAT_PIN_ENABLE : BQ2415X_STAT_PIN_DISABLE; else return -EINVAL; ret = bq2415x_exec_command(bq, command); if (ret < 0) return ret; return count; } /* show *_enable entries */ static ssize_t bq2415x_sysfs_show_enable(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq2415x_device *bq = power_supply_get_drvdata(psy); enum bq2415x_command command; int ret; if (strcmp(attr->attr.name, "charge_termination_enable") == 0) command = BQ2415X_CHARGE_TERMINATION_STATUS; else if (strcmp(attr->attr.name, "high_impedance_enable") == 0) command = BQ2415X_HIGH_IMPEDANCE_STATUS; else if (strcmp(attr->attr.name, "otg_pin_enable") == 0) command = BQ2415X_OTG_PIN_STATUS; else if (strcmp(attr->attr.name, "stat_pin_enable") == 0) command = BQ2415X_STAT_PIN_STATUS; else return -EINVAL; ret = bq2415x_exec_command(bq, command); if (ret < 0) return ret; return sprintf(buf, "%d\n", ret); } static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); static DEVICE_ATTR(reported_mode, S_IRUGO, bq2415x_sysfs_show_reported_mode, NULL); static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode); static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer); static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers); static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); static struct attribute *bq2415x_sysfs_attributes[] = { /* * TODO: some (appropriate) of these attrs should be switched to * use power supply class props. */ &dev_attr_current_limit.attr, &dev_attr_weak_battery_voltage.attr, &dev_attr_battery_regulation_voltage.attr, &dev_attr_charge_current.attr, &dev_attr_termination_current.attr, &dev_attr_charge_termination_enable.attr, &dev_attr_high_impedance_enable.attr, &dev_attr_otg_pin_enable.attr, &dev_attr_stat_pin_enable.attr, &dev_attr_reported_mode.attr, &dev_attr_mode.attr, &dev_attr_timer.attr, &dev_attr_registers.attr, &dev_attr_otg_status.attr, &dev_attr_charge_status.attr, &dev_attr_boost_status.attr, &dev_attr_fault_status.attr, NULL, }; static const struct attribute_group bq2415x_sysfs_attr_group = { .attrs = bq2415x_sysfs_attributes, }; static int bq2415x_sysfs_init(struct bq2415x_device *bq) { return sysfs_create_group(&bq->charger->dev.kobj, &bq2415x_sysfs_attr_group); } static void bq2415x_sysfs_exit(struct bq2415x_device *bq) { sysfs_remove_group(&bq->charger->dev.kobj, &bq2415x_sysfs_attr_group); } /* main bq2415x probe function */ static int bq2415x_probe(struct i2c_client *client, const struct i2c_device_id *id) { int ret; int num; char *name; struct bq2415x_device *bq; struct device_node *np = client->dev.of_node; struct bq2415x_platform_data *pdata = client->dev.platform_data; if (!np && !pdata) { dev_err(&client->dev, "platform data missing\n"); return -ENODEV; } /* Get new ID for the new device */ mutex_lock(&bq2415x_id_mutex); num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL); mutex_unlock(&bq2415x_id_mutex); if (num < 0) return num; name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num); if (!name) { dev_err(&client->dev, "failed to allocate device name\n"); ret = -ENOMEM; goto error_1; } bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL); if (!bq) { dev_err(&client->dev, "failed to allocate device data\n"); ret = -ENOMEM; goto error_2; } if (np) { bq->notify_psy = power_supply_get_by_phandle(np, "ti,usb-charger-detection"); if (IS_ERR(bq->notify_psy)) { dev_info(&client->dev, "no 'ti,usb-charger-detection' property (err=%ld)\n", PTR_ERR(bq->notify_psy)); bq->notify_psy = NULL; } else if (!bq->notify_psy) { ret = -EPROBE_DEFER; goto error_2; } } else if (pdata->notify_device) bq->notify_psy = power_supply_get_by_name(pdata->notify_device); else bq->notify_psy = NULL; i2c_set_clientdata(client, bq); bq->id = num; bq->dev = &client->dev; bq->chip = id->driver_data; bq->name = name; bq->mode = BQ2415X_MODE_OFF; bq->reported_mode = BQ2415X_MODE_OFF; bq->autotimer = 0; bq->automode = 0; if (np) { ret = of_property_read_u32(np, "ti,current-limit", &bq->init_data.current_limit); if (ret) goto error_2; ret = of_property_read_u32(np, "ti,weak-battery-voltage", &bq->init_data.weak_battery_voltage); if (ret) goto error_2; ret = of_property_read_u32(np, "ti,battery-regulation-voltage", &bq->init_data.battery_regulation_voltage); if (ret) goto error_2; ret = of_property_read_u32(np, "ti,charge-current", &bq->init_data.charge_current); if (ret) goto error_2; ret = of_property_read_u32(np, "ti,termination-current", &bq->init_data.termination_current); if (ret) goto error_2; ret = of_property_read_u32(np, "ti,resistor-sense", &bq->init_data.resistor_sense); if (ret) goto error_2; } else { memcpy(&bq->init_data, pdata, sizeof(bq->init_data)); } bq2415x_reset_chip(bq); ret = bq2415x_power_supply_init(bq); if (ret) { dev_err(bq->dev, "failed to register power supply: %d\n", ret); goto error_2; } ret = bq2415x_sysfs_init(bq); if (ret) { dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret); goto error_3; } ret = bq2415x_set_defaults(bq); if (ret) { dev_err(bq->dev, "failed to set default values: %d\n", ret); goto error_4; } if (bq->notify_psy) { bq->nb.notifier_call = bq2415x_notifier_call; ret = power_supply_reg_notifier(&bq->nb); if (ret) { dev_err(bq->dev, "failed to reg notifier: %d\n", ret); goto error_5; } /* Query for initial reported_mode and set it */ bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED, bq->notify_psy); bq2415x_set_mode(bq, bq->reported_mode); bq->automode = 1; dev_info(bq->dev, "automode enabled\n"); } else { bq->automode = -1; dev_info(bq->dev, "automode not supported\n"); } INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work); bq2415x_set_autotimer(bq, 1); dev_info(bq->dev, "driver registered\n"); return 0; error_5: error_4: bq2415x_sysfs_exit(bq); error_3: bq2415x_power_supply_exit(bq); error_2: kfree(name); error_1: mutex_lock(&bq2415x_id_mutex); idr_remove(&bq2415x_id, num); mutex_unlock(&bq2415x_id_mutex); return ret; } /* main bq2415x remove function */ static int bq2415x_remove(struct i2c_client *client) { struct bq2415x_device *bq = i2c_get_clientdata(client); if (bq->notify_psy) power_supply_unreg_notifier(&bq->nb); bq2415x_sysfs_exit(bq); bq2415x_power_supply_exit(bq); bq2415x_reset_chip(bq); mutex_lock(&bq2415x_id_mutex); idr_remove(&bq2415x_id, bq->id); mutex_unlock(&bq2415x_id_mutex); dev_info(bq->dev, "driver unregistered\n"); kfree(bq->name); return 0; } static const struct i2c_device_id bq2415x_i2c_id_table[] = { { "bq2415x", BQUNKNOWN }, { "bq24150", BQ24150 }, { "bq24150a", BQ24150A }, { "bq24151", BQ24151 }, { "bq24151a", BQ24151A }, { "bq24152", BQ24152 }, { "bq24153", BQ24153 }, { "bq24153a", BQ24153A }, { "bq24155", BQ24155 }, { "bq24156", BQ24156 }, { "bq24156a", BQ24156A }, { "bq24157s", BQ24157S }, { "bq24158", BQ24158 }, {}, }; MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table); static struct i2c_driver bq2415x_driver = { .driver = { .name = "bq2415x-charger", }, .probe = bq2415x_probe, .remove = bq2415x_remove, .id_table = bq2415x_i2c_id_table, }; module_i2c_driver(bq2415x_driver); MODULE_AUTHOR("Pali Rohár "); MODULE_DESCRIPTION("bq2415x charger driver"); MODULE_LICENSE("GPL");