diff options
Diffstat (limited to 'drivers/power/supply/ip5xxx_power.c')
| -rw-r--r-- | drivers/power/supply/ip5xxx_power.c | 883 |
1 files changed, 883 insertions, 0 deletions
diff --git a/drivers/power/supply/ip5xxx_power.c b/drivers/power/supply/ip5xxx_power.c new file mode 100644 index 000000000000..24eea7a91b30 --- /dev/null +++ b/drivers/power/supply/ip5xxx_power.c @@ -0,0 +1,883 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2021 Samuel Holland <samuel@sholland.org> + +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/power_supply.h> +#include <linux/regmap.h> + +#define IP5XXX_BAT_TYPE_4_2V 0x0 +#define IP5XXX_BAT_TYPE_4_3V 0x1 +#define IP5XXX_BAT_TYPE_4_35V 0x2 +#define IP5XXX_BAT_TYPE_4_4V 0x3 +#define IP5XXX_CHG_STAT_IDLE 0x0 +#define IP5XXX_CHG_STAT_TRICKLE 0x1 +#define IP5XXX_CHG_STAT_CONST_VOLT 0x2 +#define IP5XXX_CHG_STAT_CONST_CUR 0x3 +#define IP5XXX_CHG_STAT_CONST_VOLT_STOP 0x4 +#define IP5XXX_CHG_STAT_FULL 0x5 +#define IP5XXX_CHG_STAT_TIMEOUT 0x6 + +struct ip5xxx { + struct regmap *regmap; + bool initialized; + struct { + struct { + /* Charger enable */ + struct regmap_field *enable; + /* Constant voltage value */ + struct regmap_field *const_volt_sel; + /* Constant current value */ + struct regmap_field *const_curr_sel; + /* Charger status */ + struct regmap_field *status; + /* Charging ended flag */ + struct regmap_field *chg_end; + /* Timeout flags (CV, charge, trickle) */ + struct regmap_field *timeout; + /* Overvoltage limit */ + struct regmap_field *vin_overvolt; + } charger; + struct { + /* Boost converter enable */ + struct regmap_field *enable; + struct { + /* Light load shutdown enable */ + struct regmap_field *enable; + /* Light load shutdown current limit */ + struct regmap_field *i_limit; + } light_load_shutdown; + /* Automatic powerup on increased load */ + struct regmap_field *load_powerup_en; + /* Automatic powerup on VIN pull-out */ + struct regmap_field *vin_pullout_en; + /* Undervoltage limit */ + struct regmap_field *undervolt_limit; + /* Light load status flag */ + struct regmap_field *light_load_status; + } boost; + struct { + /* NTC disable */ + struct regmap_field *ntc_dis; + /* Battery voltage type */ + struct regmap_field *type; + /* Battery voltage autoset from Vset pin */ + struct regmap_field *vset_en; + struct { + /* Battery measurement registers */ + struct ip5xxx_battery_adc_regs { + struct regmap_field *low; + struct regmap_field *high; + } volt, curr, open_volt; + } adc; + } battery; + struct { + /* Double/long press shutdown enable */ + struct regmap_field *shdn_enable; + /* WLED activation: double press or long press */ + struct regmap_field *wled_mode; + /* Shutdown activation: double press or long press */ + struct regmap_field *shdn_mode; + /* Long press time */ + struct regmap_field *long_press_time; + /* Button pressed */ + struct regmap_field *pressed; + /* Button long-pressed */ + struct regmap_field *long_pressed; + /* Button short-pressed */ + struct regmap_field *short_pressed; + } btn; + struct { + /* WLED enable */ + struct regmap_field *enable; + /* WLED detect */ + struct regmap_field *detect_en; + /* WLED present */ + struct regmap_field *present; + } wled; + } regs; + + /* Maximum supported battery voltage (via regs.battery.type) */ + int vbat_max; + /* Scaling constants for regs.boost.undervolt_limit */ + struct { + int setpoint; + int microvolts_per_bit; + } boost_undervolt; + /* Scaling constants for regs.charger.const_curr_sel */ + struct { + int setpoint; + } const_curr; + /* Whether regs.charger.chg_end is inverted */ + u8 chg_end_inverted; +}; + +#define REG_FIELD_UNSUPPORTED { .lsb = 1 } +/* Register fields layout. Unsupported registers marked as { .lsb = 1 } */ +struct ip5xxx_regfield_config { + const struct reg_field charger_enable; + const struct reg_field charger_const_volt_sel; + const struct reg_field charger_const_curr_sel; + const struct reg_field charger_status; + const struct reg_field charger_chg_end; + const struct reg_field charger_timeout; + const struct reg_field charger_vin_overvolt; + const struct reg_field boost_enable; + const struct reg_field boost_llshdn_enable; + const struct reg_field boost_llshdn_i_limit; + const struct reg_field boost_load_powerup_en; + const struct reg_field boost_vin_pullout_en; + const struct reg_field boost_undervolt_limit; + const struct reg_field boost_light_load_status; + const struct reg_field battery_ntc_dis; + const struct reg_field battery_type; + const struct reg_field battery_vset_en; + const struct reg_field battery_adc_volt_low; + const struct reg_field battery_adc_volt_high; + const struct reg_field battery_adc_curr_low; + const struct reg_field battery_adc_curr_high; + const struct reg_field battery_adc_ovolt_low; + const struct reg_field battery_adc_ovolt_high; + const struct reg_field btn_shdn_enable; + const struct reg_field btn_wled_mode; + const struct reg_field btn_shdn_mode; + const struct reg_field btn_long_press_time; + const struct reg_field btn_pressed; + const struct reg_field btn_long_pressed; + const struct reg_field btn_short_pressed; + const struct reg_field wled_enable; + const struct reg_field wled_detect_en; + const struct reg_field wled_present; + + int vbat_max; + int boost_undervolt_setpoint; + int boost_undervolt_uv_per_bit; + int const_curr_setpoint; + u8 chg_end_inverted; +}; + +/* + * The IP5xxx charger only responds on I2C when it is "awake". The charger is + * generally only awake when VIN is powered or when its boost converter is + * enabled. Going into shutdown resets all register values. To handle this: + * 1) When any bus error occurs, assume the charger has gone into shutdown. + * 2) Attempt the initialization sequence on each subsequent register access + * until it succeeds. + */ +static int ip5xxx_read(struct ip5xxx *ip5xxx, struct regmap_field *field, + unsigned int *val) +{ + int ret; + + if (!field) + return -EOPNOTSUPP; + + ret = regmap_field_read(field, val); + if (ret) + ip5xxx->initialized = false; + + return ret; +} + +static int ip5xxx_write(struct ip5xxx *ip5xxx, struct regmap_field *field, + unsigned int val) +{ + int ret; + + if (!field) + return -EOPNOTSUPP; + + ret = regmap_field_write(field, val); + if (ret) + ip5xxx->initialized = false; + + return ret; +} + +static int ip5xxx_initialize(struct power_supply *psy) +{ + struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy); + int ret; + + if (ip5xxx->initialized) + return 0; + + /* + * Disable shutdown under light load. + * Enable power on when under load. + */ + if (ip5xxx->regs.boost.light_load_shutdown.enable) { + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.boost.light_load_shutdown.enable, 0); + if (ret) + return ret; + } + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.boost.load_powerup_en, 1); + if (ret) + return ret; + + /* + * Enable shutdown after a long button press (as configured below). + */ + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.btn.shdn_enable, 1); + if (ret) + return ret; + + /* + * Power on automatically when VIN is removed. + */ + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.boost.vin_pullout_en, 1); + if (ret) + return ret; + + /* + * Enable the NTC. + * Configure the button for two presses => LED, long press => shutdown. + */ + if (ip5xxx->regs.battery.ntc_dis) { + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.battery.ntc_dis, 0); + if (ret) + return ret; + } + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.btn.wled_mode, 1); + if (ret) + return ret; + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.btn.shdn_mode, 1); + if (ret) + return ret; + + ip5xxx->initialized = true; + dev_dbg(psy->dev.parent, "Initialized after power on\n"); + + return 0; +} + +static const enum power_supply_property ip5xxx_battery_properties[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_VOLTAGE_OCV, + POWER_SUPPLY_PROP_CURRENT_NOW, + 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, +}; + +static int ip5xxx_battery_get_status(struct ip5xxx *ip5xxx, int *val) +{ + unsigned int rval; + int ret; + + if (!ip5xxx->regs.charger.status) { + // Fall-back to Charging Ended bit + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.charger.chg_end, &rval); + if (ret) + return ret; + + if (rval == ip5xxx->chg_end_inverted) + *val = POWER_SUPPLY_STATUS_CHARGING; + else + *val = POWER_SUPPLY_STATUS_NOT_CHARGING; + return 0; + } + + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.charger.status, &rval); + if (ret) + return ret; + + switch (rval) { + case IP5XXX_CHG_STAT_IDLE: + *val = POWER_SUPPLY_STATUS_DISCHARGING; + break; + case IP5XXX_CHG_STAT_TRICKLE: + case IP5XXX_CHG_STAT_CONST_CUR: + case IP5XXX_CHG_STAT_CONST_VOLT: + *val = POWER_SUPPLY_STATUS_CHARGING; + break; + case IP5XXX_CHG_STAT_CONST_VOLT_STOP: + case IP5XXX_CHG_STAT_FULL: + *val = POWER_SUPPLY_STATUS_FULL; + break; + case IP5XXX_CHG_STAT_TIMEOUT: + *val = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int ip5xxx_battery_get_charge_type(struct ip5xxx *ip5xxx, int *val) +{ + unsigned int rval; + int ret; + + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.charger.status, &rval); + if (ret) + return ret; + + switch (rval) { + case IP5XXX_CHG_STAT_IDLE: + case IP5XXX_CHG_STAT_CONST_VOLT_STOP: + case IP5XXX_CHG_STAT_FULL: + case IP5XXX_CHG_STAT_TIMEOUT: + *val = POWER_SUPPLY_CHARGE_TYPE_NONE; + break; + case IP5XXX_CHG_STAT_TRICKLE: + *val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; + break; + case IP5XXX_CHG_STAT_CONST_CUR: + case IP5XXX_CHG_STAT_CONST_VOLT: + *val = POWER_SUPPLY_CHARGE_TYPE_STANDARD; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int ip5xxx_battery_get_health(struct ip5xxx *ip5xxx, int *val) +{ + unsigned int rval; + int ret; + + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.charger.timeout, &rval); + if (ret) + return ret; + + if (rval) + *val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; + else + *val = POWER_SUPPLY_HEALTH_GOOD; + + return 0; +} + +static int ip5xxx_battery_get_voltage_max(struct ip5xxx *ip5xxx, int *val) +{ + unsigned int rval; + int ret; + + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.battery.type, &rval); + if (ret) + return ret; + + /* + * It is not clear what this will return if + * IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN is not set... + */ + switch (rval) { + case IP5XXX_BAT_TYPE_4_2V: + *val = 4200000; + break; + case IP5XXX_BAT_TYPE_4_3V: + *val = 4300000; + break; + case IP5XXX_BAT_TYPE_4_35V: + *val = 4350000; + break; + case IP5XXX_BAT_TYPE_4_4V: + *val = 4400000; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int ip5xxx_battery_read_adc(struct ip5xxx *ip5xxx, + struct ip5xxx_battery_adc_regs *regs, int *val) +{ + unsigned int hi, lo; + int ret; + + ret = ip5xxx_read(ip5xxx, regs->low, &lo); + if (ret) + return ret; + + ret = ip5xxx_read(ip5xxx, regs->high, &hi); + if (ret) + return ret; + + *val = sign_extend32(hi << 8 | lo, 13); + + return 0; +} + +static int ip5xxx_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy); + int raw, ret, vmax; + unsigned int rval; + + ret = ip5xxx_initialize(psy); + if (ret) + return ret; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + return ip5xxx_battery_get_status(ip5xxx, &val->intval); + + case POWER_SUPPLY_PROP_CHARGE_TYPE: + return ip5xxx_battery_get_charge_type(ip5xxx, &val->intval); + + case POWER_SUPPLY_PROP_HEALTH: + return ip5xxx_battery_get_health(ip5xxx, &val->intval); + + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: + return ip5xxx_battery_get_voltage_max(ip5xxx, &val->intval); + + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = ip5xxx_battery_read_adc(ip5xxx, &ip5xxx->regs.battery.adc.volt, &raw); + if (ret) + return ret; + + val->intval = 2600000 + DIV_ROUND_CLOSEST(raw * 26855, 100); + return 0; + + case POWER_SUPPLY_PROP_VOLTAGE_OCV: + ret = ip5xxx_battery_read_adc(ip5xxx, &ip5xxx->regs.battery.adc.open_volt, &raw); + if (ret) + return ret; + + val->intval = 2600000 + DIV_ROUND_CLOSEST(raw * 26855, 100); + return 0; + + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = ip5xxx_battery_read_adc(ip5xxx, &ip5xxx->regs.battery.adc.curr, &raw); + if (ret) + return ret; + + val->intval = DIV_ROUND_CLOSEST(raw * 149197, 200); + return 0; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.charger.const_curr_sel, &rval); + if (ret) + return ret; + + val->intval = ip5xxx->const_curr.setpoint + 100000 * rval; + return 0; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + val->intval = 100000 * 0x1f; + return 0; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax); + if (ret) + return ret; + + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.charger.const_volt_sel, &rval); + if (ret) + return ret; + + val->intval = vmax + 14000 * rval; + return 0; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: + ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax); + if (ret) + return ret; + + val->intval = vmax + 14000 * 3; + return 0; + + default: + return -EINVAL; + } +} + +static int ip5xxx_battery_set_voltage_max(struct ip5xxx *ip5xxx, int val) +{ + unsigned int rval; + int ret; + + if (val > ip5xxx->vbat_max) + return -EINVAL; + + switch (val) { + case 4200000: + rval = IP5XXX_BAT_TYPE_4_2V; + break; + case 4300000: + rval = IP5XXX_BAT_TYPE_4_3V; + break; + case 4350000: + rval = IP5XXX_BAT_TYPE_4_35V; + break; + case 4400000: + rval = IP5XXX_BAT_TYPE_4_4V; + break; + default: + return -EINVAL; + } + + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.battery.type, rval); + if (ret) + return ret; + + /* Don't try to auto-detect battery type, even if the IC could */ + if (ip5xxx->regs.battery.vset_en) { + ret = ip5xxx_write(ip5xxx, ip5xxx->regs.battery.vset_en, 1); + if (ret) + return ret; + } + + return 0; +} + +static int ip5xxx_battery_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy); + unsigned int rval; + int ret, vmax; + + ret = ip5xxx_initialize(psy); + if (ret) + return ret; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + switch (val->intval) { + case POWER_SUPPLY_STATUS_CHARGING: + rval = 1; + break; + case POWER_SUPPLY_STATUS_DISCHARGING: + case POWER_SUPPLY_STATUS_NOT_CHARGING: + rval = 0; + break; + default: + return -EINVAL; + } + return ip5xxx_write(ip5xxx, ip5xxx->regs.charger.enable, rval); + + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: + return ip5xxx_battery_set_voltage_max(ip5xxx, val->intval); + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + rval = (val->intval - ip5xxx->const_curr.setpoint) / 100000; + return ip5xxx_write(ip5xxx, ip5xxx->regs.charger.const_curr_sel, rval); + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax); + if (ret) + return ret; + + rval = (val->intval - vmax) / 14000; + return ip5xxx_write(ip5xxx, ip5xxx->regs.charger.const_volt_sel, rval); + + default: + return -EINVAL; + } +} + +static int ip5xxx_battery_property_is_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + return psp == POWER_SUPPLY_PROP_STATUS || + psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN || + psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT || + psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE; +} + +static const struct power_supply_desc ip5xxx_battery_desc = { + .name = "ip5xxx-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = ip5xxx_battery_properties, + .num_properties = ARRAY_SIZE(ip5xxx_battery_properties), + .get_property = ip5xxx_battery_get_property, + .set_property = ip5xxx_battery_set_property, + .property_is_writeable = ip5xxx_battery_property_is_writeable, +}; + +static const enum power_supply_property ip5xxx_boost_properties[] = { + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, +}; + +static int ip5xxx_boost_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy); + unsigned int rval; + int ret; + + ret = ip5xxx_initialize(psy); + if (ret) + return ret; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.boost.enable, &rval); + if (ret) + return ret; + + val->intval = !!rval; + return 0; + + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: + ret = ip5xxx_read(ip5xxx, ip5xxx->regs.boost.undervolt_limit, &rval); + if (ret) + return ret; + + val->intval = ip5xxx->boost_undervolt.setpoint + + ip5xxx->boost_undervolt.microvolts_per_bit * rval; + return 0; + + default: + return -EINVAL; + } +} + +static int ip5xxx_boost_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy); + unsigned int rval; + int ret; + + ret = ip5xxx_initialize(psy); + if (ret) + return ret; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + return ip5xxx_write(ip5xxx, ip5xxx->regs.boost.enable, !!val->intval); + + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: + rval = (val->intval - ip5xxx->boost_undervolt.setpoint) / + ip5xxx->boost_undervolt.microvolts_per_bit; + return ip5xxx_write(ip5xxx, ip5xxx->regs.boost.undervolt_limit, rval); + + default: + return -EINVAL; + } +} + +static int ip5xxx_boost_property_is_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + return true; +} + +static const struct power_supply_desc ip5xxx_boost_desc = { + .name = "ip5xxx-boost", + .type = POWER_SUPPLY_TYPE_USB, + .properties = ip5xxx_boost_properties, + .num_properties = ARRAY_SIZE(ip5xxx_boost_properties), + .get_property = ip5xxx_boost_get_property, + .set_property = ip5xxx_boost_set_property, + .property_is_writeable = ip5xxx_boost_property_is_writeable, +}; + +static const struct regmap_config ip5xxx_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xa9, +}; + +static struct ip5xxx_regfield_config ip51xx_fields = { + .charger_enable = REG_FIELD(0x01, 1, 1), + .charger_const_volt_sel = REG_FIELD(0x24, 1, 2), + .charger_const_curr_sel = REG_FIELD(0x25, 0, 4), + .charger_status = REG_FIELD(0x71, 5, 7), + .charger_chg_end = REG_FIELD(0x71, 3, 3), + .charger_timeout = REG_FIELD(0x71, 0, 2), + .charger_vin_overvolt = REG_FIELD(0x72, 5, 5), + .boost_enable = REG_FIELD(0x01, 2, 2), + .boost_llshdn_enable = REG_FIELD(0x02, 1, 1), + .boost_llshdn_i_limit = REG_FIELD(0x0c, 3, 7), + .boost_load_powerup_en = REG_FIELD(0x02, 0, 0), + .boost_vin_pullout_en = REG_FIELD(0x04, 5, 5), + .boost_undervolt_limit = REG_FIELD(0x22, 2, 3), + .boost_light_load_status = REG_FIELD(0x72, 6, 6), + .battery_ntc_dis = REG_FIELD(0x07, 6, 6), + .battery_type = REG_FIELD(0x24, 5, 6), + .battery_vset_en = REG_FIELD(0x26, 6, 6), + .battery_adc_volt_low = REG_FIELD(0xa2, 0, 7), + .battery_adc_volt_high = REG_FIELD(0xa3, 0, 5), + .battery_adc_curr_low = REG_FIELD(0xa4, 0, 7), + .battery_adc_curr_high = REG_FIELD(0xa5, 0, 5), + .battery_adc_ovolt_low = REG_FIELD(0xa8, 0, 7), + .battery_adc_ovolt_high = REG_FIELD(0xa9, 0, 5), + .btn_shdn_enable = REG_FIELD(0x03, 5, 5), + .btn_wled_mode = REG_FIELD(0x07, 1, 1), + .btn_shdn_mode = REG_FIELD(0x07, 0, 0), + .btn_long_press_time = REG_FIELD(0x03, 6, 7), + .btn_pressed = REG_FIELD(0x77, 3, 3), + .btn_long_pressed = REG_FIELD(0x77, 1, 1), + .btn_short_pressed = REG_FIELD(0x77, 0, 0), + .wled_enable = REG_FIELD(0x01, 3, 3), + .wled_detect_en = REG_FIELD(0x01, 4, 4), + .wled_present = REG_FIELD(0x72, 7, 7), + + .vbat_max = 4350000, + .boost_undervolt_setpoint = 4530000, + .boost_undervolt_uv_per_bit = 100000, +}; + +static struct ip5xxx_regfield_config ip5306_fields = { + .charger_enable = REG_FIELD(0x00, 4, 4), + .charger_const_volt_sel = REG_FIELD(0x22, 0, 1), + .charger_const_curr_sel = REG_FIELD(0x24, 0, 4), + .charger_status = REG_FIELD_UNSUPPORTED, // other bits... + .charger_chg_end = REG_FIELD(0x71, 3, 3), + .charger_timeout = REG_FIELD_UNSUPPORTED, + .charger_vin_overvolt = REG_FIELD_UNSUPPORTED, + .boost_enable = REG_FIELD(0x00, 5, 5), + .boost_llshdn_enable = REG_FIELD_UNSUPPORTED, + .boost_llshdn_i_limit = REG_FIELD_UNSUPPORTED, + .boost_load_powerup_en = REG_FIELD(0x00, 2, 2), + .boost_vin_pullout_en = REG_FIELD(0x01, 2, 2), + .boost_undervolt_limit = REG_FIELD(0x21, 2, 4), + .boost_light_load_status = REG_FIELD(0x72, 2, 2), + .battery_ntc_dis = REG_FIELD_UNSUPPORTED, + .battery_type = REG_FIELD(0x22, 2, 3), + .battery_vset_en = REG_FIELD_UNSUPPORTED, + .battery_adc_volt_low = REG_FIELD_UNSUPPORTED, + .battery_adc_volt_high = REG_FIELD_UNSUPPORTED, + .battery_adc_curr_low = REG_FIELD_UNSUPPORTED, + .battery_adc_curr_high = REG_FIELD_UNSUPPORTED, + .battery_adc_ovolt_low = REG_FIELD_UNSUPPORTED, + .battery_adc_ovolt_high = REG_FIELD_UNSUPPORTED, + .btn_shdn_enable = REG_FIELD(0x00, 0, 0), + .btn_wled_mode = REG_FIELD(0x01, 6, 6), + .btn_shdn_mode = REG_FIELD(0x01, 7, 7), + .btn_long_press_time = REG_FIELD(0x02, 4, 4), // +1s + .btn_pressed = REG_FIELD_UNSUPPORTED, + /* TODO: double press */ + .btn_long_pressed = REG_FIELD(0x77, 1, 1), + .btn_short_pressed = REG_FIELD(0x77, 0, 0), + .wled_enable = REG_FIELD_UNSUPPORTED, + .wled_detect_en = REG_FIELD_UNSUPPORTED, + .wled_present = REG_FIELD_UNSUPPORTED, + + .vbat_max = 4400000, + .boost_undervolt_setpoint = 4450000, + .boost_undervolt_uv_per_bit = 50000, + .const_curr_setpoint = 50000, + .chg_end_inverted = 1, +}; + +#define ip5xxx_setup_reg(_field, _reg) \ + do { \ + if (likely(cfg->_field.lsb <= cfg->_field.msb)) { \ + struct regmap_field *_tmp = devm_regmap_field_alloc(dev, \ + ip5xxx->regmap, cfg->_field); \ + if (!IS_ERR(_tmp)) \ + ip5xxx->regs._reg = _tmp; \ + } \ + } while (0) + +static void ip5xxx_setup_regs(struct device *dev, struct ip5xxx *ip5xxx, + const struct ip5xxx_regfield_config *cfg) +{ + ip5xxx_setup_reg(charger_enable, charger.enable); + ip5xxx_setup_reg(charger_const_volt_sel, charger.const_volt_sel); + ip5xxx_setup_reg(charger_const_curr_sel, charger.const_curr_sel); + ip5xxx_setup_reg(charger_status, charger.status); + ip5xxx_setup_reg(charger_chg_end, charger.chg_end); + ip5xxx_setup_reg(charger_timeout, charger.timeout); + ip5xxx_setup_reg(charger_vin_overvolt, charger.vin_overvolt); + ip5xxx_setup_reg(boost_enable, boost.enable); + ip5xxx_setup_reg(boost_llshdn_enable, boost.light_load_shutdown.enable); + ip5xxx_setup_reg(boost_llshdn_i_limit, boost.light_load_shutdown.i_limit); + ip5xxx_setup_reg(boost_load_powerup_en, boost.load_powerup_en); + ip5xxx_setup_reg(boost_vin_pullout_en, boost.vin_pullout_en); + ip5xxx_setup_reg(boost_undervolt_limit, boost.undervolt_limit); + ip5xxx_setup_reg(boost_light_load_status, boost.light_load_status); + ip5xxx_setup_reg(battery_ntc_dis, battery.ntc_dis); + ip5xxx_setup_reg(battery_type, battery.type); + ip5xxx_setup_reg(battery_vset_en, battery.vset_en); + ip5xxx_setup_reg(battery_adc_volt_low, battery.adc.volt.low); + ip5xxx_setup_reg(battery_adc_volt_high, battery.adc.volt.high); + ip5xxx_setup_reg(battery_adc_curr_low, battery.adc.curr.low); + ip5xxx_setup_reg(battery_adc_curr_high, battery.adc.curr.high); + ip5xxx_setup_reg(battery_adc_ovolt_low, battery.adc.open_volt.low); + ip5xxx_setup_reg(battery_adc_ovolt_high, battery.adc.open_volt.high); + ip5xxx_setup_reg(btn_shdn_enable, btn.shdn_enable); + ip5xxx_setup_reg(btn_wled_mode, btn.wled_mode); + ip5xxx_setup_reg(btn_shdn_mode, btn.shdn_mode); + ip5xxx_setup_reg(btn_long_press_time, btn.long_press_time); + ip5xxx_setup_reg(btn_pressed, btn.pressed); + ip5xxx_setup_reg(btn_long_pressed, btn.long_pressed); + ip5xxx_setup_reg(btn_short_pressed, btn.short_pressed); + ip5xxx_setup_reg(wled_enable, wled.enable); + ip5xxx_setup_reg(wled_detect_en, wled.detect_en); + ip5xxx_setup_reg(wled_present, wled.present); + + ip5xxx->vbat_max = cfg->vbat_max; + ip5xxx->boost_undervolt.setpoint = cfg->boost_undervolt_setpoint; + ip5xxx->boost_undervolt.microvolts_per_bit = cfg->boost_undervolt_uv_per_bit; + ip5xxx->const_curr.setpoint = cfg->const_curr_setpoint; + ip5xxx->chg_end_inverted = cfg->chg_end_inverted; +} + +static int ip5xxx_power_probe(struct i2c_client *client) +{ + const struct ip5xxx_regfield_config *fields; + struct power_supply_config psy_cfg = {}; + struct device *dev = &client->dev; + struct power_supply *psy; + struct ip5xxx *ip5xxx; + + ip5xxx = devm_kzalloc(dev, sizeof(*ip5xxx), GFP_KERNEL); + if (!ip5xxx) + return -ENOMEM; + + ip5xxx->regmap = devm_regmap_init_i2c(client, &ip5xxx_regmap_config); + if (IS_ERR(ip5xxx->regmap)) + return PTR_ERR(ip5xxx->regmap); + + fields = i2c_get_match_data(client) ?: &ip51xx_fields; + ip5xxx_setup_regs(dev, ip5xxx, fields); + + psy_cfg.fwnode = dev_fwnode(dev); + psy_cfg.drv_data = ip5xxx; + + psy = devm_power_supply_register(dev, &ip5xxx_battery_desc, &psy_cfg); + if (IS_ERR(psy)) + return PTR_ERR(psy); + + psy = devm_power_supply_register(dev, &ip5xxx_boost_desc, &psy_cfg); + if (IS_ERR(psy)) + return PTR_ERR(psy); + + return 0; +} + +static const struct of_device_id ip5xxx_power_of_match[] = { + { .compatible = "injoinic,ip5108", .data = &ip51xx_fields }, + { .compatible = "injoinic,ip5109", .data = &ip51xx_fields }, + { .compatible = "injoinic,ip5207", .data = &ip51xx_fields }, + { .compatible = "injoinic,ip5209", .data = &ip51xx_fields }, + { .compatible = "injoinic,ip5306", .data = &ip5306_fields }, + { } +}; +MODULE_DEVICE_TABLE(of, ip5xxx_power_of_match); + +static struct i2c_driver ip5xxx_power_driver = { + .probe = ip5xxx_power_probe, + .driver = { + .name = "ip5xxx-power", + .of_match_table = ip5xxx_power_of_match, + } +}; +module_i2c_driver(ip5xxx_power_driver); + +MODULE_AUTHOR("Samuel Holland <samuel@sholland.org>"); +MODULE_DESCRIPTION("Injoinic IP5xxx power bank IC driver"); +MODULE_LICENSE("GPL"); |