// SPDX-License-Identifier: GPL-2.0 /* * Chrager driver for cw221x * * Copyright (c) 2022 Rockchip Electronics Co., Ltd. * * Author: Xu Shengfei */ #include #include #include #include #include #include #include #include #include #include /* Module parameters. */ static int debug; module_param_named(debug, debug, int, 0644); MODULE_PARM_DESC(debug, "Set to one to enable debugging messages."); #define cw_printk(fmt, arg...) \ { \ if (debug) \ pr_info("FG_CW221X: %s-%d:" fmt, __func__, __LINE__, ##arg); \ } #define CW_PROPERTIES "cw221X-bat" #define REG_CHIP_ID 0x00 #define REG_VCELL_H 0x02 #define REG_VCELL_L 0x03 #define REG_SOC_INT 0x04 #define REG_SOC_DECIMAL 0x05 #define REG_TEMP 0x06 #define REG_MODE_CONFIG 0x08 #define REG_GPIO_CONFIG 0x0A #define REG_SOC_ALERT 0x0B #define REG_TEMP_MAX 0x0C #define REG_TEMP_MIN 0x0D #define REG_CURRENT_H 0x0E #define REG_CURRENT_L 0x0F #define REG_T_HOST_H 0xA0 #define REG_T_HOST_L 0xA1 #define REG_USER_CONF 0xA2 #define REG_CYCLE_H 0xA4 #define REG_CYCLE_L 0xA5 #define REG_SOH 0xA6 #define REG_IC_STATE 0xA7 #define REG_FW_VERSION 0xAB #define REG_BAT_PROFILE 0x10 #define CONFIG_MODE_RESTART 0x30 #define CONFIG_MODE_ACTIVE 0x00 #define CONFIG_MODE_SLEEP 0xF0 #define CONFIG_UPDATE_FLG 0x80 #define IC_VCHIP_ID 0xA0 #define IC_READY_MARK 0x0C #define GPIO_ENABLE_MIN_TEMP 0 #define GPIO_ENABLE_MAX_TEMP 0 #define GPIO_ENABLE_SOC_CHANGE 0 #define GPIO_SOC_IRQ_VALUE 0x0 /* 0x7F */ #define DEFINED_MAX_TEMP 45 #define DEFINED_MIN_TEMP 0 #define CWFG_NAME "cw221X" #define SIZE_OF_PROFILE 80 /* mhom rsense * 1000 for convenience calculation */ #define USER_RSENSE 1500 #define queue_delayed_work_time 5000 #define queue_start_work_time 50 #define CW_SLEEP_20MS 20 #define CW_SLEEP_10MS 10 #define CW_UI_FULL 100 #define COMPLEMENT_CODE_U16 0x8000 #define CW_SLEEP_100MS 100 #define CW_SLEEP_200MS 200 #define CW_SLEEP_COUNTS 50 #define CW_TRUE 1 #define CW_RETRY_COUNT 3 #define CW_VOL_UNIT 1000 #define CW_LOW_VOLTAGE_REF 2500 #define CW_LOW_VOLTAGE 3000 #define CW_LOW_VOLTAGE_STEP 10 #define CW221X_NOT_ACTIVE 1 #define CW221X_PROFILE_NOT_READY 2 #define CW221X_PROFILE_NEED_UPDATE 3 #define CW2215_MARK 0x80 #define CW2217_MARK 0x40 #define CW2218_MARK 0x00 static unsigned char config_profile_info[SIZE_OF_PROFILE] = { 0x5A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xA0, 0xB2, 0xC2, 0xCA, 0xC2, 0xBD, 0x9C, 0x5C, 0x38, 0xFF, 0xFF, 0xC4, 0x86, 0x74, 0x60, 0x55, 0x4F, 0x4D, 0x4B, 0x80, 0xC0, 0xDB, 0xCD, 0xD0, 0xCE, 0xD2, 0xD3, 0xD2, 0xD0, 0xCE, 0xC3, 0xD5, 0xB9, 0xC9, 0xC5, 0xA3, 0x92, 0x8A, 0x80, 0x72, 0x63, 0x62, 0x74, 0x90, 0xA6, 0x7E, 0x5F, 0x48, 0x80, 0x00, 0xAB, 0x10, 0x00, 0xA1, 0xFB, 0x00, 0x00, 0x00, 0x64, 0x1E, 0xB1, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4D, }; struct cw_battery { struct i2c_client *client; struct device *dev; struct workqueue_struct *cwfg_workqueue; struct delayed_work battery_delay_work; struct power_supply *cw_bat; int user_rsense; u8 *bat_profile; int chip_id; int voltage; int ic_soc_h; int ic_soc_l; int ui_soc; int temp; long cw_current; int cycle; int soh; int fw_version; }; /* CW221X iic read function */ static int cw_read(struct i2c_client *client, unsigned char reg, unsigned char buf[]) { int ret; ret = i2c_smbus_read_i2c_block_data(client, reg, 1, buf); if (ret < 0) dev_err(&client->dev, "IIC error %d\n", ret); return ret; } /* CW221X iic write function */ static int cw_write(struct i2c_client *client, unsigned char reg, unsigned char const buf[]) { int ret; ret = i2c_smbus_write_i2c_block_data(client, reg, 1, &buf[0]); if (ret < 0) dev_err(&client->dev, "IIC error %d\n", ret); return ret; } /* CW221X iic read word function */ static int cw_read_word(struct i2c_client *client, unsigned char reg, unsigned char buf[]) { unsigned char reg_val[2] = {0, 0}; unsigned int temp_val_buff; unsigned int temp_val_second; int ret; ret = i2c_smbus_read_i2c_block_data(client, reg, 2, reg_val); if (ret < 0) dev_err(&client->dev, "IIC error %d\n", ret); temp_val_buff = (reg_val[0] << 8) + reg_val[1]; msleep(CW_SLEEP_10MS); ret = i2c_smbus_read_i2c_block_data(client, reg, 2, reg_val); if (ret < 0) dev_err(&client->dev, "IIC error %d\n", ret); temp_val_second = (reg_val[0] << 8) + reg_val[1]; if (temp_val_buff != temp_val_second) { msleep(CW_SLEEP_10MS); ret = i2c_smbus_read_i2c_block_data(client, reg, 2, reg_val); if (ret < 0) { dev_err(&client->dev, "IIC error %d\n", ret); return ret; } } buf[0] = reg_val[0]; buf[1] = reg_val[1]; return ret; } /* CW221X iic write profile function */ static int cw_write_profile(struct i2c_client *client, unsigned char const buf[]) { int ret; int i; for (i = 0; i < SIZE_OF_PROFILE; i++) { ret = cw_write(client, REG_BAT_PROFILE + i, &buf[i]); if (ret < 0) { dev_err(&client->dev, "IIC error %d\n", ret); return ret; } } return ret; } /* * CW221X Active function * The CONFIG register is used for the host MCU to configure the fuel gauge IC. * The default value is 0xF0, SLEEP and RESTART bits are set. To power up the IC, * the host MCU needs to write 0x30 to exit shutdown mode, and then write 0x00 to * restart the gauge to enter active mode. To reset the IC, the host MCU needs * to write 0xF0, 0x30 and 0x00 in sequence to this register to complete the * restart procedure. The CW221X will reload relevant parameters and settings and * restart SOC calculation. Note that the SOC may be a different value after reset * operation since it is a brand-new calculation based on the latest battery status. * CONFIG [3:0] is reserved. Don't do any operation with it. */ static int cw221X_active(struct cw_battery *cw_bat) { unsigned char reg_val = CONFIG_MODE_RESTART; int ret; ret = cw_write(cw_bat->client, REG_MODE_CONFIG, ®_val); if (ret < 0) return ret; msleep(CW_SLEEP_20MS); /* Here delay must >= 20 ms */ reg_val = CONFIG_MODE_ACTIVE; ret = cw_write(cw_bat->client, REG_MODE_CONFIG, ®_val); if (ret < 0) return ret; msleep(CW_SLEEP_10MS); return 0; } /* * CW221X Sleep function * The CONFIG register is used for the host MCU to configure the fuel gauge IC. * The default value is 0xF0,SLEEP and RESTART bits are set. To power up the IC, * the host MCU needs to write 0x30 to exit shutdown mode, and then write 0x00 * to restart the gauge to enter active mode. To reset the IC, the host MCU needs * to write 0xF0, 0x30 and 0x00 in sequence to this register to complete the restart * procedure. The CW221X will reload relevant parameters and settings and restart SOC * calculation. Note that the SOC may be a different value after reset operation since * it is a brand-new calculation based on the latest battery status. * CONFIG [3:0] is reserved. Don't do any operation with it. */ static int cw221X_sleep(struct cw_battery *cw_bat) { unsigned char reg_val = CONFIG_MODE_RESTART; int ret; ret = cw_write(cw_bat->client, REG_MODE_CONFIG, ®_val); if (ret < 0) return ret; msleep(CW_SLEEP_20MS); /* Here delay must >= 20 ms */ reg_val = CONFIG_MODE_SLEEP; ret = cw_write(cw_bat->client, REG_MODE_CONFIG, ®_val); if (ret < 0) return ret; msleep(CW_SLEEP_10MS); return 0; } /* * The 0x00 register is an UNSIGNED 8bit read-only register. Its value is * fixed to 0xA0 in shutdown mode and active mode. */ static int cw_get_chip_id(struct cw_battery *cw_bat) { unsigned char reg_val; int chip_id; int ret; ret = cw_read(cw_bat->client, REG_CHIP_ID, ®_val); if (ret < 0) return ret; chip_id = reg_val; /* This value must be 0xA0! */ pr_info("CW: chip_id = 0x%x\n", chip_id); cw_bat->chip_id = chip_id; return 0; } /* * The VCELL register(0x02 0x03) is an UNSIGNED 14bit read-only register that * updates the battery voltage continuously. Battery voltage is measured between * the VCELL pin and VSS pin, which is the ground reference. A 14bit * sigma-delta A/D converter is used and the voltage resolution is 312.5uV. (0.3125mV is *5/16) */ static int cw_get_voltage(struct cw_battery *cw_bat) { unsigned char reg_val[2] = {0, 0}; unsigned int voltage; int ret; ret = cw_read_word(cw_bat->client, REG_VCELL_H, reg_val); if (ret < 0) return ret; voltage = (reg_val[0] << 8) + reg_val[1]; voltage = voltage * 5 / 16; cw_bat->voltage = voltage; return 0; } /* * The SOC register(0x04 0x05) is an UNSIGNED 16bit read-only register that indicates * the SOC of the battery. The SOC shows in % format, which means how much percent of * the battery's total available capacity is remaining in the battery now. The SOC can * intrinsically adjust itself to cater to the change of battery status, * including load, temperature and aging etc. * The high byte(0x04) contains the SOC in 1% unit which can be directly used if * this resolution is good enough for the application. The low byte(0x05) provides * more accurate fractional part of the SOC and its * LSB is (1/256) %. */ static int cw_get_capacity(struct cw_battery *cw_bat) { unsigned char reg_val[2] = {0, 0}; int ui_100 = CW_UI_FULL; int ui_soc; int soc_h; int soc_l; int ret; ret = cw_read_word(cw_bat->client, REG_SOC_INT, reg_val); if (ret < 0) return ret; soc_h = reg_val[0]; soc_l = reg_val[1]; ui_soc = ((soc_h * 256 + soc_l) * 100) / (ui_100 * 256); /* remainder = (((soc_h * 256 + soc_l) * 100 * 100) / (ui_100 * 256)) % 100; */ if (ui_soc >= 100) { cw_printk("CW221x[%d]: UI_SOC = %d larger 100!\n", __LINE__, ui_soc); ui_soc = 100; } cw_bat->ic_soc_h = soc_h; cw_bat->ic_soc_l = soc_l; cw_bat->ui_soc = ui_soc; return 0; } /* * The TEMP register is an UNSIGNED 8bit read only register. * It reports the real-time battery temperature * measured at TS pin. The scope is from -40 to 87.5 degrees Celsius, * LSB is 0.5 degree Celsius. TEMP(C) = - 40 + Value(0x06 Reg) / 2 */ static int cw_get_temp(struct cw_battery *cw_bat) { unsigned char reg_val; int temp; int ret; ret = cw_read(cw_bat->client, REG_TEMP, ®_val); if (ret < 0) return ret; temp = (int)reg_val * 10 / 2 - 400; cw_bat->temp = temp; return 0; } /* get complement code function, unsigned short must be U16 */ static long get_complement_code(unsigned short raw_code) { long complement_code; int dir; if (0 != (raw_code & COMPLEMENT_CODE_U16)) { dir = -1; raw_code = (0xFFFF - raw_code) + 1; } else { dir = 1; } complement_code = (long)raw_code * dir; return complement_code; } /* * CURRENT is a SIGNED 16bit register(0x0E 0x0F) that reports current A/D converter * result of the voltage across the current sense resistor, 10mohm typical. * The result is stored as a two's complement value to show positive and negative current. * Voltages outside the minimum and maximum register values are reported as the * minimum or maximum value. The register value should be divided by the sense * resistance to convert to amperes. The value of the sense resistor determines * the resolution and the full-scale range of the current readings. The LSB of 0x0F * is (52.4/32768)uV for CW2215 and CW2217. The LSB of 0x0F is (125/32768)uV for CW2218. * The default value is 0x0000, stands for 0mA. 0x7FFF stands for the maximum charging * current and 0x8001 stands for the maximum discharging current. */ static int cw_get_current(struct cw_battery *cw_bat) { unsigned char reg_val[2] = {0, 0}; unsigned short current_reg; /* unsigned short must u16 */ long long cw_current; /* use long long type to guarantee 8 bytes space */ int ret; ret = cw_read_word(cw_bat->client, REG_CURRENT_H, reg_val); if (ret < 0) return ret; current_reg = (reg_val[0] << 8) + reg_val[1]; cw_current = get_complement_code(current_reg); if (((cw_bat->fw_version & CW2215_MARK) != 0) || ((cw_bat->fw_version & CW2217_MARK) != 0)) cw_current = cw_current * 1600 / cw_bat->user_rsense; else if ((cw_bat->fw_version != 0) && ((cw_bat->fw_version & 0xC0) == CW2218_MARK)) cw_current = cw_current * 3815 / cw_bat->user_rsense; else { cw_bat->cw_current = 0; dev_err(cw_bat->dev, "error! cw221x firmware read error!\n"); } cw_bat->cw_current = cw_current; return 0; } /* * CYCLECNT is an UNSIGNED 16bit register(0xA4 0xA5) that counts cycle life of the battery. * The LSB of 0xA5 stands for 1/16 cycle. This register will be clear after enters shutdown mode */ static int cw_get_cycle_count(struct cw_battery *cw_bat) { unsigned char reg_val[2] = {0, 0}; int cycle; int ret; ret = cw_read_word(cw_bat->client, REG_CYCLE_H, reg_val); if (ret < 0) return ret; cycle = (reg_val[0] << 8) + reg_val[1]; cw_bat->cycle = cycle / 16; return 0; } /* * SOH (State of Health) is an UNSIGNED 8bit register(0xA6) that represents the level of * battery aging by tracking battery internal impedance increment. When the device enters * active mode, this register refresh to 0x64 by default. Its range is 0x00 to 0x64, * indicating 0 to 100%. This register will be clear after enters shutdown mode. */ static int cw_get_soh(struct cw_battery *cw_bat) { int ret; unsigned char reg_val; int soh; ret = cw_read(cw_bat->client, REG_SOH, ®_val); if (ret < 0) return ret; soh = reg_val; cw_bat->soh = soh; return 0; } /* * FW_VERSION register reports the firmware (FW) running in the chip. It is fixed to * 0x00 when the chip is in shutdown mode. When in active mode, Bit [7:6] = '01' stand * for the CW2217, Bit [7:6] = '00' stand for the CW2218 and Bit [7:6] = '10' stand for CW2215. * Bit[5:0] stand for the FW version running in the chip. Note that the FW version is * subject to update and contact sales office for confirmation when necessary. */ static int cw_get_fw_version(struct cw_battery *cw_bat) { int ret; unsigned char reg_val; int fw_version; ret = cw_read(cw_bat->client, REG_FW_VERSION, ®_val); if (ret < 0) return ret; fw_version = reg_val; cw_bat->fw_version = fw_version; return 0; } static int cw_update_data(struct cw_battery *cw_bat) { int ret = 0; ret += cw_get_voltage(cw_bat); ret += cw_get_capacity(cw_bat); ret += cw_get_temp(cw_bat); ret += cw_get_current(cw_bat); ret += cw_get_cycle_count(cw_bat); ret += cw_get_soh(cw_bat); cw_printk("vol = %d current = %ld cap = %d temp = %d\n", cw_bat->voltage, cw_bat->cw_current, cw_bat->ui_soc, cw_bat->temp); return ret; } static int cw_init_data(struct cw_battery *cw_bat) { int ret = 0; ret = cw_get_fw_version(cw_bat); if (ret != 0) return ret; ret += cw_get_chip_id(cw_bat); ret += cw_get_voltage(cw_bat); ret += cw_get_capacity(cw_bat); ret += cw_get_temp(cw_bat); ret += cw_get_current(cw_bat); ret += cw_get_cycle_count(cw_bat); ret += cw_get_soh(cw_bat); cw_printk("chip_id = %d vol = %d cur = %ld cap = %d temp = %d fw_version = %d\n", cw_bat->chip_id, cw_bat->voltage, cw_bat->cw_current, cw_bat->ui_soc, cw_bat->temp, cw_bat->fw_version); return ret; } static int cw221x_parse_properties(struct cw_battery *cw_bat) { struct device *dev = cw_bat->dev; int length; int ret; ret = device_property_read_u32(dev, "cw,user_rsense", &cw_bat->user_rsense); if (ret) cw_bat->user_rsense = USER_RSENSE; if (cw_bat->user_rsense == 0) cw_bat->user_rsense = USER_RSENSE; cw_printk("user_rsense: %d\n", cw_bat->user_rsense); length = device_property_count_u8(dev, "cellwise,battery-profile"); if (length < 0) { dev_warn(cw_bat->dev, "No battery-profile found, using current flash contents\n"); } else if (length != SIZE_OF_PROFILE) { dev_err(cw_bat->dev, "battery-profile must be %d bytes\n", SIZE_OF_PROFILE); return -EINVAL; } cw_bat->bat_profile = devm_kzalloc(dev, length, GFP_KERNEL); if (!cw_bat->bat_profile) return -ENOMEM; ret = device_property_read_u8_array(dev, "cellwise,battery-profile", cw_bat->bat_profile, length); return ret; } static void cw_config_profile_init(struct cw_battery *cw_bat) { int i, ret; ret = cw221x_parse_properties(cw_bat); if (ret) { /* update new battery info */ cw_bat->bat_profile = config_profile_info; cw_printk("the driver profile:\n"); } for (i = 0; i < SIZE_OF_PROFILE; i++) cw_printk("[%d]: 0x%x\n", i, cw_bat->bat_profile[i]); } /*CW221X update profile function, Often called during initialization*/ static int cw_config_start_ic(struct cw_battery *cw_bat) { unsigned char reg_val; int count = 0; int i, ret; ret = cw221X_sleep(cw_bat); if (ret < 0) return ret; /* update new battery info */ ret = cw_write_profile(cw_bat->client, cw_bat->bat_profile); if (ret < 0) return ret; cw_printk("the driver profile:\n"); for (i = 0; i < SIZE_OF_PROFILE; i++) cw_printk("[%d]: 0x%x\n", i, cw_bat->bat_profile[i]); /* set UPDATE_FLAG AND SOC INTTERRUP VALUE */ reg_val = CONFIG_UPDATE_FLG | GPIO_SOC_IRQ_VALUE; ret = cw_write(cw_bat->client, REG_SOC_ALERT, ®_val); if (ret < 0) return ret; /* close all interruptes */ reg_val = 0; ret = cw_write(cw_bat->client, REG_GPIO_CONFIG, ®_val); if (ret < 0) return ret; ret = cw221X_active(cw_bat); if (ret < 0) return ret; while (CW_TRUE) { msleep(CW_SLEEP_100MS); cw_read(cw_bat->client, REG_IC_STATE, ®_val); if (IC_READY_MARK == (reg_val & IC_READY_MARK)) break; count++; if (count >= CW_SLEEP_COUNTS) { cw221X_sleep(cw_bat); return -1; } } return 0; } /* * Get the cw221X running state * Determine whether the profile needs to be updated */ static int cw221X_get_state(struct cw_battery *cw_bat) { int ret; unsigned char reg_val; int i; int reg_profile; ret = cw_read(cw_bat->client, REG_MODE_CONFIG, ®_val); if (ret < 0) return ret; if (reg_val != CONFIG_MODE_ACTIVE) return CW221X_NOT_ACTIVE; ret = cw_read(cw_bat->client, REG_SOC_ALERT, ®_val); if (ret < 0) return ret; if (0x00 == (reg_val & CONFIG_UPDATE_FLG)) return CW221X_PROFILE_NOT_READY; for (i = 0; i < SIZE_OF_PROFILE; i++) { ret = cw_read(cw_bat->client, (REG_BAT_PROFILE + i), ®_val); if (ret < 0) return ret; reg_profile = REG_BAT_PROFILE + i; cw_printk("fuelgauge: 0x%2x = 0x%2x\n", reg_profile, reg_val); if (cw_bat->bat_profile[i] != reg_val) break; } if (i != SIZE_OF_PROFILE) return CW221X_PROFILE_NEED_UPDATE; return 0; } /* CW221X init function, Often called during initialization */ static int cw_init(struct cw_battery *cw_bat) { int ret; ret = cw_get_chip_id(cw_bat); if (ret < 0) { dev_err(cw_bat->dev, "iic read write error"); return ret; } if (cw_bat->chip_id != IC_VCHIP_ID) { dev_err(cw_bat->dev, "not cw221X\n"); return -1; } ret = cw221X_get_state(cw_bat); if (ret < 0) { dev_err(cw_bat->dev, "iic read write error"); return ret; } if (ret != 0) { cw_printk("need update profile\n"); ret = cw_config_start_ic(cw_bat); if (ret < 0) return ret; } else cw_printk("not need update profile\n"); cw_printk("cw221X init success!\n"); return 0; } static void cw_bat_work(struct work_struct *work) { struct delayed_work *delay_work; struct cw_battery *cw_bat; static int soc; int ret; delay_work = container_of(work, struct delayed_work, work); cw_bat = container_of(delay_work, struct cw_battery, battery_delay_work); ret = cw_update_data(cw_bat); if (ret < 0) dev_err(cw_bat->dev, "i2c read error when update data"); if (cw_bat->ui_soc != soc) { soc = cw_bat->ui_soc; power_supply_changed(cw_bat->cw_bat); } queue_delayed_work(cw_bat->cwfg_workqueue, &cw_bat->battery_delay_work, msecs_to_jiffies(queue_delayed_work_time)); } static int cw_battery_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { /* struct cw_battery *cw_bat = power_supply_get_drvdata(psy); */ int ret = 0; switch (psp) { default: ret = -EINVAL; break; } return ret; } static int cw_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct cw_battery *cw_bat = power_supply_get_drvdata(psy); int ret = 0; switch (psp) { case POWER_SUPPLY_PROP_CYCLE_COUNT: val->intval = cw_bat->cycle; break; case POWER_SUPPLY_PROP_CAPACITY: val->intval = cw_bat->ui_soc; break; case POWER_SUPPLY_PROP_CAPACITY_LEVEL: if ((cw_bat->ui_soc < 1) && (!power_supply_is_system_supplied())) val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; else if (cw_bat->ui_soc <= 20) val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; else if (cw_bat->ui_soc <= 70) val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; else if (cw_bat->ui_soc <= 90) val->intval = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; else val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; break; case POWER_SUPPLY_PROP_STATUS: if (cw_bat->ui_soc == 100 * 1000) val->intval = POWER_SUPPLY_STATUS_FULL; else { if (power_supply_is_system_supplied()) val->intval = POWER_SUPPLY_STATUS_CHARGING; else val->intval = POWER_SUPPLY_STATUS_DISCHARGING; } break; case POWER_SUPPLY_PROP_CHARGE_FULL: case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: val->intval = 10 * 1000 * 1000;/* uAh */ break; case POWER_SUPPLY_PROP_HEALTH: val->intval = POWER_SUPPLY_HEALTH_GOOD; break; case POWER_SUPPLY_PROP_PRESENT: val->intval = (cw_bat->voltage <= 0) ? 0 : 1; break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: cw_get_voltage(cw_bat); val->intval = cw_bat->voltage * CW_VOL_UNIT; break; case POWER_SUPPLY_PROP_CURRENT_NOW: cw_get_current(cw_bat); val->intval = cw_bat->cw_current * 1000; /* uA */ break; case POWER_SUPPLY_PROP_TECHNOLOGY: val->intval = POWER_SUPPLY_TECHNOLOGY_LION; break; case POWER_SUPPLY_PROP_TEMP: val->intval = cw_bat->temp; break; default: ret = -EINVAL; break; } return ret; } static enum power_supply_property cw_battery_properties[] = { POWER_SUPPLY_PROP_CYCLE_COUNT, POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_CAPACITY_LEVEL, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_CHARGE_FULL, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_NOW, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_TEMP, }; static int cw221X_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct power_supply_config psy_cfg = {0}; struct power_supply_desc *psy_desc; struct cw_battery *cw_bat; int loop = 0; int ret; cw_bat = devm_kzalloc(&client->dev, sizeof(*cw_bat), GFP_KERNEL); if (!cw_bat) return -ENOMEM; i2c_set_clientdata(client, cw_bat); cw_bat->client = client; cw_bat->dev = &client->dev; dev_dbg(cw_bat->dev, "cw221X driver versions-%d\n", 20220830); cw_config_profile_init(cw_bat); ret = cw_init(cw_bat); while ((loop++ < CW_RETRY_COUNT) && (ret != 0)) { msleep(CW_SLEEP_200MS); ret = cw_init(cw_bat); } if (ret) { dev_err(cw_bat->dev, "cw221X init fail!\n"); return ret; } ret = cw_init_data(cw_bat); if (ret) { dev_err(cw_bat->dev, "cw221X init data fail!\n"); return ret; } psy_desc = devm_kzalloc(&client->dev, sizeof(*psy_desc), GFP_KERNEL); if (!psy_desc) return -ENOMEM; psy_cfg.drv_data = cw_bat; psy_desc->name = CW_PROPERTIES; psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; psy_desc->properties = cw_battery_properties; psy_desc->num_properties = ARRAY_SIZE(cw_battery_properties); psy_desc->get_property = cw_battery_get_property; psy_desc->set_property = cw_battery_set_property; cw_bat->cw_bat = devm_power_supply_register(&client->dev, psy_desc, &psy_cfg); if (IS_ERR(cw_bat->cw_bat)) { ret = PTR_ERR(cw_bat->cw_bat); dev_err(cw_bat->dev, "failed to register battery: %d\n", ret); return ret; } cw_bat->cwfg_workqueue = create_singlethread_workqueue("cwfg_gauge"); INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work); queue_delayed_work(cw_bat->cwfg_workqueue, &cw_bat->battery_delay_work, msecs_to_jiffies(queue_start_work_time)); cw_printk("cw221X driver probe success!\n"); return 0; } static void cw221X_remove(struct i2c_client *client) { struct cw_battery *cw_bat = i2c_get_clientdata(client); cancel_delayed_work_sync(&cw_bat->battery_delay_work); destroy_workqueue(cw_bat->cwfg_workqueue); } #ifdef CONFIG_PM static int cw_bat_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct cw_battery *cw_bat = i2c_get_clientdata(client); cancel_delayed_work(&cw_bat->battery_delay_work); return 0; } static int cw_bat_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct cw_battery *cw_bat = i2c_get_clientdata(client); queue_delayed_work(cw_bat->cwfg_workqueue, &cw_bat->battery_delay_work, msecs_to_jiffies(20)); return 0; } static const struct dev_pm_ops cw_bat_pm_ops = { .suspend = cw_bat_suspend, .resume = cw_bat_resume, }; #endif static const struct i2c_device_id cw221X_id_table[] = { { CWFG_NAME, 0 }, { } }; MODULE_DEVICE_TABLE(i2c, cw221X_id_table); #ifdef CONFIG_OF static const struct of_device_id cw221X_match_table[] = { { .compatible = "cellwise,cw221X", }, { }, }; MODULE_DEVICE_TABLE(of, cw221X_match_table); #endif static struct i2c_driver cw221X_driver = { .driver = { .name = CWFG_NAME, #ifdef CONFIG_PM .pm = &cw_bat_pm_ops, #endif .owner = THIS_MODULE, .of_match_table = of_match_ptr(cw221X_match_table), }, .probe = cw221X_probe, .remove = cw221X_remove, .id_table = cw221X_id_table, }; module_i2c_driver(cw221X_driver); MODULE_AUTHOR("Xu Shengfei "); MODULE_DESCRIPTION("CW221X FGADC Device Driver V0.1"); MODULE_LICENSE("GPL");