diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 31abccec4d93..d24177610deb 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -127,6 +127,17 @@ config BATTERY_CW2015 This driver can also be built as a module. If so, the module will be called cw2015_battery. +config BATTERY_CW2017 + tristate "CW2017 Battery driver" + depends on I2C + select REGMAP_I2C + help + Say Y here to enable support for the cellwise cw2017 + battery fuel gauge (used in the Pinebook Pro & others) + + This driver can also be built as a module. If so, the module will be + called cw2017_battery. + config BATTERY_DS2760 tristate "DS2760 battery driver (HP iPAQ & others)" depends on W1 diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index eec17d90f846..38ecd12059fa 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_BATTERY_AXP20X) += axp20x_battery.o obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o obj-$(CONFIG_BATTERY_CPCAP) += cpcap-battery.o obj-$(CONFIG_BATTERY_CW2015) += cw2015_battery.o +obj-$(CONFIG_BATTERY_CW2017) += cw2017_battery.o obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o diff --git a/drivers/power/supply/cw2017_battery.c b/drivers/power/supply/cw2017_battery.c new file mode 100644 index 000000000000..36134942fabd --- /dev/null +++ b/drivers/power/supply/cw2017_battery.c @@ -0,0 +1,678 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Fuel gauge driver for CellWise 2017 + * + * Copyright (C) 2012, RockChip + * + * Authors: Shunqing Chen + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CW2017_SIZE_BATINFO 80 + +#define CW2017_REG_VERSION 0x00 +#define CW2017_REG_VCELL_H 0x02 +#define CW2017_REG_VCELL_L 0x03 +#define CW2017_REG_SOC_INT 0x04 +#define CW2017_REG_SOC_DECIMAL 0x05 +#define CW2017_REG_TEMP 0x06 +#define CW2017_REG_MODE_CONFIG 0x08 +#define CW2017_REG_INT_CONFIG 0x0A +#define CW2017_REG_SOC_ALERT 0x0B +#define CW2017_REG_TEMP_MAX 0x0C +#define CW2017_REG_TEMP_MIN 0x0D +#define CW2017_REG_VOLT_ID_H 0x0E +#define CW2017_REG_VOLT_ID_L 0x0F +#define CW2017_REG_BATINFO 0x10 + +#define CW2017_MODE_SLEEP 0x30 +#define CW2017_MODE_NORMAL 0x00 +#define CW2017_MODE_DEFAULT 0xF0 + +#define CW2017_CONFIG_UPDATE_FLG 0x80 +#define NO_START_VERSION 160 + +#define TEMP_MAX_ALERT 0xFFFF +#define TEMP_MIN_ALERT 0xFFFF +#define TEMP_ALERT_DISABLE 0xFFFF + +#define INT_CONFIG_MIN_TEMP_MARK BIT(4) +#define INT_CONFIG_MAX_TEMP_MARK BIT(5) +#define INT_CONFIG_SOC_CHANGE_MARK BIT(6) + +#define DEF_DESIGN_CAPACITY 4000 + +#define CW2017_MASK_ATHD GENMASK(7, 0) + +/* reset gauge of no valid state of charge could be polled for 40s */ +#define CW2017_BAT_SOC_ERROR_MS (40 * MSEC_PER_SEC) +/* reset gauge if state of charge stuck for half an hour during charging */ +#define CW2017_BAT_CHARGING_STUCK_MS (1800 * MSEC_PER_SEC) + +/* poll interval from CellWise GPL Android driver example */ +#define CW2017_DEFAULT_POLL_INTERVAL_MS 8000 + +struct cw_battery { + struct device *dev; + struct workqueue_struct *battery_workqueue; + struct delayed_work battery_delay_work; + struct regmap *regmap; + struct power_supply *rk_bat; + struct power_supply_battery_info battery; + u8 *bat_profile; + + bool charger_attached; + bool battery_changed; + + int soc; + int voltage_mv; + int status; + int charge_count; + int design_capacity; + + u32 poll_interval_ms; + u32 alert_level; + int temp_max; + int temp_min; + int temp; + + bool dual_cell; + + unsigned int read_errors; + unsigned int charge_stuck_cnt; +}; + +static int cw_read_word(struct cw_battery *cw_bat, u8 reg, u16 *val) +{ + __be16 value; + int ret; + + ret = regmap_bulk_read(cw_bat->regmap, reg, &value, sizeof(value)); + if (ret) + return ret; + + *val = be16_to_cpu(value); + return 0; +} + +static void cw2017_enable(struct cw_battery *cw_bat) +{ + unsigned char reg_val = CW2017_MODE_DEFAULT; + + regmap_write(cw_bat->regmap, CW2017_REG_MODE_CONFIG, reg_val); + msleep(20); + reg_val = CW2017_MODE_SLEEP; + regmap_write(cw_bat->regmap, CW2017_REG_MODE_CONFIG, reg_val); + msleep(20); + reg_val = CW2017_MODE_NORMAL; + regmap_write(cw_bat->regmap, CW2017_REG_MODE_CONFIG, reg_val); + msleep(20); +} + +static int cw_update_profile(struct cw_battery *cw_bat) +{ + int ret; + unsigned int reg_val = 0; + unsigned char int_mask = 0; + + /* write new battery info */ + ret = regmap_raw_write(cw_bat->regmap, CW2017_REG_BATINFO, + cw_bat->bat_profile, + CW2017_SIZE_BATINFO); + if (ret) + return ret; + + /* set config update flag */ + reg_val |= CW2017_CONFIG_UPDATE_FLG; + reg_val &= ~CW2017_MASK_ATHD; + reg_val |= cw_bat->alert_level; + regmap_write(cw_bat->regmap, CW2017_REG_SOC_ALERT, reg_val); + + if (cw_bat->alert_level) + int_mask |= INT_CONFIG_SOC_CHANGE_MARK; + + cw_bat->temp_max = TEMP_MAX_ALERT; + cw_bat->temp_min = TEMP_MIN_ALERT; + if (cw_bat->temp_max != TEMP_ALERT_DISABLE) { + int_mask |= INT_CONFIG_MAX_TEMP_MARK; + reg_val = (cw_bat->temp_max + 40) * 2; + regmap_write(cw_bat->regmap, CW2017_REG_TEMP_MAX, reg_val); + } + if (cw_bat->temp_min != TEMP_ALERT_DISABLE) { + int_mask |= INT_CONFIG_MIN_TEMP_MARK; + reg_val = (cw_bat->temp_min + 40) * 2; + regmap_write(cw_bat->regmap, CW2017_REG_TEMP_MIN, reg_val); + } + regmap_write(cw_bat->regmap, CW2017_REG_INT_CONFIG, int_mask); + + /* wait for gauge to reset */ + msleep(20); + + /* wait for gauge to become ready */ + ret = regmap_read_poll_timeout(cw_bat->regmap, CW2017_REG_SOC_INT, + reg_val, reg_val <= 100, + 10 * USEC_PER_MSEC, 10 * USEC_PER_SEC); + if (ret) + dev_err(cw_bat->dev, + "Gauge did not become ready after profile upload\n"); + else + dev_dbg(cw_bat->dev, "Battery profile updated\n"); + + cw2017_enable(cw_bat); + dev_dbg(cw_bat->dev, "Battery profile configured\n"); + + return ret; +} + +static int cw_init(struct cw_battery *cw_bat) +{ + int ret; + unsigned int reg_val; + unsigned int config_flg; + + regmap_read(cw_bat->regmap, CW2017_REG_MODE_CONFIG, ®_val); + regmap_read(cw_bat->regmap, CW2017_REG_SOC_ALERT, &config_flg); + + if (reg_val != CW2017_MODE_NORMAL || !(config_flg & CW2017_CONFIG_UPDATE_FLG)) { + dev_dbg(cw_bat->dev, + "Battery profile not present, uploading battery profile\n"); + if (cw_bat->bat_profile) { + ret = cw_update_profile(cw_bat); + if (ret) { + dev_err(cw_bat->dev, + "Failed to upload battery profile\n"); + return ret; + } + } else { + dev_warn(cw_bat->dev, + "No profile specified, continuing without profile\n"); + } + } else if (cw_bat->bat_profile) { + u8 bat_info[CW2017_SIZE_BATINFO]; + + ret = regmap_raw_read(cw_bat->regmap, CW2017_REG_BATINFO, + bat_info, CW2017_SIZE_BATINFO); + if (ret) { + dev_err(cw_bat->dev, + "Failed to read stored battery profile\n"); + return ret; + } + + if (memcmp(bat_info, cw_bat->bat_profile, CW2017_SIZE_BATINFO)) { + dev_warn(cw_bat->dev, "Replacing stored battery profile\n"); + ret = cw_update_profile(cw_bat); + if (ret) + return ret; + } + } else { + dev_warn(cw_bat->dev, + "Can't check current battery profile, no profile provided\n"); + } + + return 0; +} + +#define HYSTERESIS(current, previous, up, down) \ + (((current) < (previous) + (up)) && ((current) > (previous) - (down))) + +static int cw_get_soc(struct cw_battery *cw_bat) +{ + unsigned int soc; + + regmap_read(cw_bat->regmap, CW2017_REG_SOC_INT, &soc); + if (soc > 100) { + int max_error_cycles = + CW2017_BAT_SOC_ERROR_MS / cw_bat->poll_interval_ms; + + dev_err(cw_bat->dev, "Invalid SoC %d%%\n", soc); + cw_bat->read_errors++; + if (cw_bat->read_errors > max_error_cycles) { + dev_warn(cw_bat->dev, + "Too many invalid SoC reports, resetting gauge\n"); + cw_bat->read_errors = 0; + } + return cw_bat->soc; + } + cw_bat->read_errors = 0; + + /* Reset gauge if stuck while charging */ + if (cw_bat->status == POWER_SUPPLY_STATUS_CHARGING && soc == cw_bat->soc) { + int max_stuck_cycles = + CW2017_BAT_CHARGING_STUCK_MS / cw_bat->poll_interval_ms; + + cw_bat->charge_stuck_cnt++; + if (cw_bat->charge_stuck_cnt > max_stuck_cycles) { + dev_warn(cw_bat->dev, + "SoC stuck @%u%%, resetting gauge\n", soc); + cw_bat->charge_stuck_cnt = 0; + } + } else { + cw_bat->charge_stuck_cnt = 0; + } + + /* Ignore voltage dips during charge */ + if (cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 0, 3)) + soc = cw_bat->soc; + + /* Ignore voltage spikes during discharge */ + if (!cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 3, 0)) + soc = cw_bat->soc; + + return soc; +} + +static int cw_get_voltage(struct cw_battery *cw_bat) +{ + int voltage_mv; + u16 reg_val = 0; + + cw_read_word(cw_bat, CW2017_REG_VCELL_H, ®_val); + reg_val &= 0x3fff; + voltage_mv = reg_val * 5 / 16; + if (cw_bat->dual_cell) + voltage_mv *= 2; + + dev_dbg(cw_bat->dev, "Read voltage: %d mV, raw=0x%04x\n", + voltage_mv, reg_val); + + return voltage_mv; +} + +static void cw_update_charge_status(struct cw_battery *cw_bat) +{ + int ret; + + ret = power_supply_am_i_supplied(cw_bat->rk_bat); + if (ret < 0) { + dev_warn(cw_bat->dev, "Failed to get supply state: %d\n", ret); + } else { + bool charger_attached; + + charger_attached = !!ret; + if (cw_bat->charger_attached != charger_attached) { + cw_bat->battery_changed = true; + if (charger_attached) + cw_bat->charge_count++; + } + cw_bat->charger_attached = charger_attached; + } +} + +static void cw_update_soc(struct cw_battery *cw_bat) +{ + int soc; + + soc = cw_get_soc(cw_bat); + if (soc < 0) + dev_err(cw_bat->dev, "Failed to get SoC from gauge: %d\n", soc); + else if (cw_bat->soc != soc) { + cw_bat->soc = soc; + cw_bat->battery_changed = true; + } +} + +static void cw_update_voltage(struct cw_battery *cw_bat) +{ + int voltage_mv; + + voltage_mv = cw_get_voltage(cw_bat); + if (voltage_mv < 0) + dev_err(cw_bat->dev, "Failed to get voltage from gauge: %d\n", + voltage_mv); + else + cw_bat->voltage_mv = voltage_mv; +} + +static int cw_update_temp(struct cw_battery *cw_bat) +{ + unsigned int val = 0; + + regmap_read(cw_bat->regmap, CW2017_REG_TEMP, &val); + cw_bat->temp = val * 10 / 2 - 400; + + return cw_bat->temp; +} + +static void cw_update_status(struct cw_battery *cw_bat) +{ + int status = POWER_SUPPLY_STATUS_DISCHARGING; + + if (cw_bat->charger_attached) { + if (cw_bat->soc >= 100) + status = POWER_SUPPLY_STATUS_FULL; + else + status = POWER_SUPPLY_STATUS_CHARGING; + } + + if (cw_bat->status != status) + cw_bat->battery_changed = true; + cw_bat->status = status; +} + +static void cw_bat_work(struct work_struct *work) +{ + struct delayed_work *delay_work; + struct cw_battery *cw_bat; + + delay_work = to_delayed_work(work); + cw_bat = container_of(delay_work, struct cw_battery, battery_delay_work); + + cw_update_soc(cw_bat); + cw_update_voltage(cw_bat); + cw_update_charge_status(cw_bat); + cw_update_temp(cw_bat); + cw_update_status(cw_bat); + + dev_dbg(cw_bat->dev, "charger_attached = %d\n", cw_bat->charger_attached); + dev_dbg(cw_bat->dev, "status = %d\n", cw_bat->status); + dev_dbg(cw_bat->dev, "soc = %d%%\n", cw_bat->soc); + dev_dbg(cw_bat->dev, "voltage = %dmV\n", cw_bat->voltage_mv); + + if (cw_bat->battery_changed) + power_supply_changed(cw_bat->rk_bat); + cw_bat->battery_changed = false; + + queue_delayed_work(cw_bat->battery_workqueue, + &cw_bat->battery_delay_work, + msecs_to_jiffies(cw_bat->poll_interval_ms)); +} + +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; + + cw_bat = power_supply_get_drvdata(psy); + switch (psp) { + case POWER_SUPPLY_PROP_CAPACITY: + val->intval = cw_bat->soc; + break; + + case POWER_SUPPLY_PROP_STATUS: + val->intval = cw_bat->status; + break; + + case POWER_SUPPLY_PROP_PRESENT: + val->intval = !!cw_bat->voltage_mv; + break; + + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + val->intval = cw_bat->voltage_mv * 1000; + break; + + case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: + val->intval = 0; + break; + + case POWER_SUPPLY_PROP_TECHNOLOGY: + val->intval = POWER_SUPPLY_TECHNOLOGY_LION; + break; + + case POWER_SUPPLY_PROP_CHARGE_COUNTER: + val->intval = cw_bat->charge_count; + break; + + case POWER_SUPPLY_PROP_TEMP: + val->intval = cw_bat->temp; + break; + + case POWER_SUPPLY_PROP_CHARGE_FULL: + case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: + if (cw_bat->battery.charge_full_design_uah > 0) + val->intval = cw_bat->battery.charge_full_design_uah; + else + val->intval = cw_bat->design_capacity * 1000; + break; + + case POWER_SUPPLY_PROP_CURRENT_NOW: + val->intval = 0; + break; + + default: + break; + } + return 0; +} + +static enum power_supply_property cw_battery_properties[] = { + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_CHARGE_COUNTER, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_CURRENT_NOW, +}; + +static const struct power_supply_desc cw2017_bat_desc = { + .name = "cw2017-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = cw_battery_properties, + .num_properties = ARRAY_SIZE(cw_battery_properties), + .get_property = cw_battery_get_property, +}; + +static int cw2017_parse_properties(struct cw_battery *cw_bat) +{ + struct device *dev = cw_bat->dev; + int length; + int ret; + + 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 != CW2017_SIZE_BATINFO) { + dev_err(cw_bat->dev, "battery-profile must be %d bytes\n", + CW2017_SIZE_BATINFO); + 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); + if (ret) + return ret; + + ret = device_property_read_u32(dev, "cellwise,design-capacity-amh", + &cw_bat->design_capacity); + if (ret) { + dev_info(cw_bat->dev, "Missing design capacity\n"); + cw_bat->design_capacity = DEF_DESIGN_CAPACITY; + } + + device_property_read_u32(dev, "cellwise,alert-level", + &cw_bat->alert_level); + + cw_bat->dual_cell = device_property_read_bool(dev, "cellwise,dual-cell"); + + ret = device_property_read_u32(dev, "cellwise,monitor-interval-ms", + &cw_bat->poll_interval_ms); + if (ret) { + dev_dbg(cw_bat->dev, "Using default poll interval\n"); + cw_bat->poll_interval_ms = CW2017_DEFAULT_POLL_INTERVAL_MS; + } + + return 0; +} + +static const struct regmap_range regmap_ranges_rd_yes[] = { + regmap_reg_range(CW2017_REG_VERSION, CW2017_REG_VERSION), + regmap_reg_range(CW2017_REG_VCELL_H, CW2017_REG_TEMP), + regmap_reg_range(CW2017_REG_MODE_CONFIG, CW2017_REG_MODE_CONFIG), + regmap_reg_range(CW2017_REG_INT_CONFIG, + CW2017_REG_BATINFO + CW2017_SIZE_BATINFO - 1), +}; + +static const struct regmap_access_table regmap_rd_table = { + .yes_ranges = regmap_ranges_rd_yes, + .n_yes_ranges = ARRAY_SIZE(regmap_ranges_rd_yes), +}; + +static const struct regmap_range regmap_ranges_wr_yes[] = { + regmap_reg_range(CW2017_REG_MODE_CONFIG, CW2017_REG_MODE_CONFIG), + regmap_reg_range(CW2017_REG_INT_CONFIG, CW2017_REG_TEMP_MIN), + regmap_reg_range(CW2017_REG_BATINFO, + CW2017_REG_BATINFO + CW2017_SIZE_BATINFO - 1), +}; + +static const struct regmap_access_table regmap_wr_table = { + .yes_ranges = regmap_ranges_wr_yes, + .n_yes_ranges = ARRAY_SIZE(regmap_ranges_wr_yes), +}; + +static const struct regmap_range regmap_ranges_vol_yes[] = { + regmap_reg_range(CW2017_REG_VCELL_H, CW2017_REG_TEMP), +}; + +static const struct regmap_access_table regmap_vol_table = { + .yes_ranges = regmap_ranges_vol_yes, + .n_yes_ranges = ARRAY_SIZE(regmap_ranges_vol_yes), +}; + +static const struct regmap_config cw2017_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .rd_table = ®map_rd_table, + .wr_table = ®map_wr_table, + .volatile_table = ®map_vol_table, + .max_register = CW2017_REG_BATINFO + CW2017_SIZE_BATINFO - 1, +}; + +static int cw_bat_probe(struct i2c_client *client) +{ + int ret; + struct cw_battery *cw_bat; + struct power_supply_config psy_cfg = { 0 }; + + cw_bat = devm_kzalloc(&client->dev, sizeof(*cw_bat), GFP_KERNEL); + if (!cw_bat) + return -ENOMEM; + + i2c_set_clientdata(client, cw_bat); + cw_bat->dev = &client->dev; + cw_bat->soc = 1; + + ret = cw2017_parse_properties(cw_bat); + if (ret) { + dev_err(cw_bat->dev, "Failed to parse cw2017 properties\n"); + return ret; + } + + cw_bat->regmap = devm_regmap_init_i2c(client, &cw2017_regmap_config); + if (IS_ERR(cw_bat->regmap)) { + dev_err(cw_bat->dev, "Failed to allocate regmap: %ld\n", + PTR_ERR(cw_bat->regmap)); + return PTR_ERR(cw_bat->regmap); + } + + ret = cw_init(cw_bat); + if (ret) { + dev_err(cw_bat->dev, "Init failed: %d\n", ret); + return ret; + } + + psy_cfg.drv_data = cw_bat; + psy_cfg.fwnode = dev_fwnode(cw_bat->dev); + + cw_bat->rk_bat = devm_power_supply_register(&client->dev, + &cw2017_bat_desc, + &psy_cfg); + if (IS_ERR(cw_bat->rk_bat)) { + dev_err(cw_bat->dev, "Failed to register power supply\n"); + return PTR_ERR(cw_bat->rk_bat); + } + + ret = power_supply_get_battery_info(cw_bat->rk_bat, &cw_bat->battery); + if (ret) { + dev_warn(cw_bat->dev, + "No monitored battery, some properties will be missing\n"); + } + + cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery"); + INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work); + queue_delayed_work(cw_bat->battery_workqueue, + &cw_bat->battery_delay_work, msecs_to_jiffies(10)); + + return 0; +} + +static int __maybe_unused 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_sync(&cw_bat->battery_delay_work); + return 0; +} + +static int __maybe_unused 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->battery_workqueue, + &cw_bat->battery_delay_work, 0); + return 0; +} + +static SIMPLE_DEV_PM_OPS(cw_bat_pm_ops, cw_bat_suspend, cw_bat_resume); + +static int cw_bat_remove(struct i2c_client *client) +{ + struct cw_battery *cw_bat = i2c_get_clientdata(client); + + cancel_delayed_work_sync(&cw_bat->battery_delay_work); + power_supply_put_battery_info(cw_bat->rk_bat, &cw_bat->battery); + return 0; +} + +static const struct i2c_device_id cw_bat_id_table[] = { + { "cw2017", 0 }, + { } +}; + +static const struct of_device_id cw2017_of_match[] = { + { .compatible = "cellwise,cw2017" }, + { } +}; +MODULE_DEVICE_TABLE(of, cw2017_of_match); + +static struct i2c_driver cw_bat_driver = { + .driver = { + .name = "cw2017", + .of_match_table = cw2017_of_match, + .pm = &cw_bat_pm_ops, + }, + .probe_new = cw_bat_probe, + .remove = cw_bat_remove, + .id_table = cw_bat_id_table, +}; + +module_i2c_driver(cw_bat_driver); + +MODULE_AUTHOR("Shunqing Chen"); +MODULE_DESCRIPTION("cw2017 battery driver"); +MODULE_LICENSE("GPL");