diff options
Diffstat (limited to 'drivers/power/supply/bq25980_charger.c')
| -rw-r--r-- | drivers/power/supply/bq25980_charger.c | 1298 |
1 files changed, 1298 insertions, 0 deletions
diff --git a/drivers/power/supply/bq25980_charger.c b/drivers/power/supply/bq25980_charger.c new file mode 100644 index 000000000..b94ecf814 --- /dev/null +++ b/drivers/power/supply/bq25980_charger.c @@ -0,0 +1,1298 @@ +// SPDX-License-Identifier: GPL-2.0 +// BQ25980 Battery Charger Driver +// Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/ + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/gpio/consumer.h> +#include <linux/power_supply.h> +#include <linux/regmap.h> +#include <linux/types.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/moduleparam.h> +#include <linux/slab.h> + +#include "bq25980_charger.h" + +struct bq25980_state { + bool dischg; + bool ovp; + bool ocp; + bool wdt; + bool tflt; + bool online; + bool ce; + bool hiz; + bool bypass; + + u32 vbat_adc; + u32 vsys_adc; + u32 ibat_adc; +}; + +enum bq25980_id { + BQ25980, + BQ25975, + BQ25960, +}; + +struct bq25980_chip_info { + + int model_id; + + const struct regmap_config *regmap_config; + + int busocp_def; + int busocp_sc_max; + int busocp_byp_max; + int busocp_sc_min; + int busocp_byp_min; + + int busovp_sc_def; + int busovp_byp_def; + int busovp_sc_step; + + int busovp_sc_offset; + int busovp_byp_step; + int busovp_byp_offset; + int busovp_sc_min; + int busovp_sc_max; + int busovp_byp_min; + int busovp_byp_max; + + int batovp_def; + int batovp_max; + int batovp_min; + int batovp_step; + int batovp_offset; + + int batocp_def; + int batocp_max; +}; + +struct bq25980_init_data { + u32 ichg; + u32 bypass_ilim; + u32 sc_ilim; + u32 vreg; + u32 iterm; + u32 iprechg; + u32 bypass_vlim; + u32 sc_vlim; + u32 ichg_max; + u32 vreg_max; +}; + +struct bq25980_device { + struct i2c_client *client; + struct device *dev; + struct power_supply *charger; + struct power_supply *battery; + struct mutex lock; + struct regmap *regmap; + + char model_name[I2C_NAME_SIZE]; + + struct bq25980_init_data init_data; + const struct bq25980_chip_info *chip_info; + struct bq25980_state state; + int watchdog_timer; +}; + +static struct reg_default bq25980_reg_defs[] = { + {BQ25980_BATOVP, 0x5A}, + {BQ25980_BATOVP_ALM, 0x46}, + {BQ25980_BATOCP, 0x51}, + {BQ25980_BATOCP_ALM, 0x50}, + {BQ25980_BATUCP_ALM, 0x28}, + {BQ25980_CHRGR_CTRL_1, 0x0}, + {BQ25980_BUSOVP, 0x26}, + {BQ25980_BUSOVP_ALM, 0x22}, + {BQ25980_BUSOCP, 0xD}, + {BQ25980_BUSOCP_ALM, 0xC}, + {BQ25980_TEMP_CONTROL, 0x30}, + {BQ25980_TDIE_ALM, 0xC8}, + {BQ25980_TSBUS_FLT, 0x15}, + {BQ25980_TSBAT_FLG, 0x15}, + {BQ25980_VAC_CONTROL, 0x0}, + {BQ25980_CHRGR_CTRL_2, 0x0}, + {BQ25980_CHRGR_CTRL_3, 0x20}, + {BQ25980_CHRGR_CTRL_4, 0x1D}, + {BQ25980_CHRGR_CTRL_5, 0x18}, + {BQ25980_STAT1, 0x0}, + {BQ25980_STAT2, 0x0}, + {BQ25980_STAT3, 0x0}, + {BQ25980_STAT4, 0x0}, + {BQ25980_STAT5, 0x0}, + {BQ25980_FLAG1, 0x0}, + {BQ25980_FLAG2, 0x0}, + {BQ25980_FLAG3, 0x0}, + {BQ25980_FLAG4, 0x0}, + {BQ25980_FLAG5, 0x0}, + {BQ25980_MASK1, 0x0}, + {BQ25980_MASK2, 0x0}, + {BQ25980_MASK3, 0x0}, + {BQ25980_MASK4, 0x0}, + {BQ25980_MASK5, 0x0}, + {BQ25980_DEVICE_INFO, 0x8}, + {BQ25980_ADC_CONTROL1, 0x0}, + {BQ25980_ADC_CONTROL2, 0x0}, + {BQ25980_IBUS_ADC_LSB, 0x0}, + {BQ25980_IBUS_ADC_MSB, 0x0}, + {BQ25980_VBUS_ADC_LSB, 0x0}, + {BQ25980_VBUS_ADC_MSB, 0x0}, + {BQ25980_VAC1_ADC_LSB, 0x0}, + {BQ25980_VAC2_ADC_LSB, 0x0}, + {BQ25980_VOUT_ADC_LSB, 0x0}, + {BQ25980_VBAT_ADC_LSB, 0x0}, + {BQ25980_IBAT_ADC_MSB, 0x0}, + {BQ25980_IBAT_ADC_LSB, 0x0}, + {BQ25980_TSBUS_ADC_LSB, 0x0}, + {BQ25980_TSBAT_ADC_LSB, 0x0}, + {BQ25980_TDIE_ADC_LSB, 0x0}, + {BQ25980_DEGLITCH_TIME, 0x0}, + {BQ25980_CHRGR_CTRL_6, 0x0}, +}; + +static struct reg_default bq25975_reg_defs[] = { + {BQ25980_BATOVP, 0x5A}, + {BQ25980_BATOVP_ALM, 0x46}, + {BQ25980_BATOCP, 0x51}, + {BQ25980_BATOCP_ALM, 0x50}, + {BQ25980_BATUCP_ALM, 0x28}, + {BQ25980_CHRGR_CTRL_1, 0x0}, + {BQ25980_BUSOVP, 0x26}, + {BQ25980_BUSOVP_ALM, 0x22}, + {BQ25980_BUSOCP, 0xD}, + {BQ25980_BUSOCP_ALM, 0xC}, + {BQ25980_TEMP_CONTROL, 0x30}, + {BQ25980_TDIE_ALM, 0xC8}, + {BQ25980_TSBUS_FLT, 0x15}, + {BQ25980_TSBAT_FLG, 0x15}, + {BQ25980_VAC_CONTROL, 0x0}, + {BQ25980_CHRGR_CTRL_2, 0x0}, + {BQ25980_CHRGR_CTRL_3, 0x20}, + {BQ25980_CHRGR_CTRL_4, 0x1D}, + {BQ25980_CHRGR_CTRL_5, 0x18}, + {BQ25980_STAT1, 0x0}, + {BQ25980_STAT2, 0x0}, + {BQ25980_STAT3, 0x0}, + {BQ25980_STAT4, 0x0}, + {BQ25980_STAT5, 0x0}, + {BQ25980_FLAG1, 0x0}, + {BQ25980_FLAG2, 0x0}, + {BQ25980_FLAG3, 0x0}, + {BQ25980_FLAG4, 0x0}, + {BQ25980_FLAG5, 0x0}, + {BQ25980_MASK1, 0x0}, + {BQ25980_MASK2, 0x0}, + {BQ25980_MASK3, 0x0}, + {BQ25980_MASK4, 0x0}, + {BQ25980_MASK5, 0x0}, + {BQ25980_DEVICE_INFO, 0x8}, + {BQ25980_ADC_CONTROL1, 0x0}, + {BQ25980_ADC_CONTROL2, 0x0}, + {BQ25980_IBUS_ADC_LSB, 0x0}, + {BQ25980_IBUS_ADC_MSB, 0x0}, + {BQ25980_VBUS_ADC_LSB, 0x0}, + {BQ25980_VBUS_ADC_MSB, 0x0}, + {BQ25980_VAC1_ADC_LSB, 0x0}, + {BQ25980_VAC2_ADC_LSB, 0x0}, + {BQ25980_VOUT_ADC_LSB, 0x0}, + {BQ25980_VBAT_ADC_LSB, 0x0}, + {BQ25980_IBAT_ADC_MSB, 0x0}, + {BQ25980_IBAT_ADC_LSB, 0x0}, + {BQ25980_TSBUS_ADC_LSB, 0x0}, + {BQ25980_TSBAT_ADC_LSB, 0x0}, + {BQ25980_TDIE_ADC_LSB, 0x0}, + {BQ25980_DEGLITCH_TIME, 0x0}, + {BQ25980_CHRGR_CTRL_6, 0x0}, +}; + +static struct reg_default bq25960_reg_defs[] = { + {BQ25980_BATOVP, 0x5A}, + {BQ25980_BATOVP_ALM, 0x46}, + {BQ25980_BATOCP, 0x51}, + {BQ25980_BATOCP_ALM, 0x50}, + {BQ25980_BATUCP_ALM, 0x28}, + {BQ25980_CHRGR_CTRL_1, 0x0}, + {BQ25980_BUSOVP, 0x26}, + {BQ25980_BUSOVP_ALM, 0x22}, + {BQ25980_BUSOCP, 0xD}, + {BQ25980_BUSOCP_ALM, 0xC}, + {BQ25980_TEMP_CONTROL, 0x30}, + {BQ25980_TDIE_ALM, 0xC8}, + {BQ25980_TSBUS_FLT, 0x15}, + {BQ25980_TSBAT_FLG, 0x15}, + {BQ25980_VAC_CONTROL, 0x0}, + {BQ25980_CHRGR_CTRL_2, 0x0}, + {BQ25980_CHRGR_CTRL_3, 0x20}, + {BQ25980_CHRGR_CTRL_4, 0x1D}, + {BQ25980_CHRGR_CTRL_5, 0x18}, + {BQ25980_STAT1, 0x0}, + {BQ25980_STAT2, 0x0}, + {BQ25980_STAT3, 0x0}, + {BQ25980_STAT4, 0x0}, + {BQ25980_STAT5, 0x0}, + {BQ25980_FLAG1, 0x0}, + {BQ25980_FLAG2, 0x0}, + {BQ25980_FLAG3, 0x0}, + {BQ25980_FLAG4, 0x0}, + {BQ25980_FLAG5, 0x0}, + {BQ25980_MASK1, 0x0}, + {BQ25980_MASK2, 0x0}, + {BQ25980_MASK3, 0x0}, + {BQ25980_MASK4, 0x0}, + {BQ25980_MASK5, 0x0}, + {BQ25980_DEVICE_INFO, 0x8}, + {BQ25980_ADC_CONTROL1, 0x0}, + {BQ25980_ADC_CONTROL2, 0x0}, + {BQ25980_IBUS_ADC_LSB, 0x0}, + {BQ25980_IBUS_ADC_MSB, 0x0}, + {BQ25980_VBUS_ADC_LSB, 0x0}, + {BQ25980_VBUS_ADC_MSB, 0x0}, + {BQ25980_VAC1_ADC_LSB, 0x0}, + {BQ25980_VAC2_ADC_LSB, 0x0}, + {BQ25980_VOUT_ADC_LSB, 0x0}, + {BQ25980_VBAT_ADC_LSB, 0x0}, + {BQ25980_IBAT_ADC_MSB, 0x0}, + {BQ25980_IBAT_ADC_LSB, 0x0}, + {BQ25980_TSBUS_ADC_LSB, 0x0}, + {BQ25980_TSBAT_ADC_LSB, 0x0}, + {BQ25980_TDIE_ADC_LSB, 0x0}, + {BQ25980_DEGLITCH_TIME, 0x0}, + {BQ25980_CHRGR_CTRL_6, 0x0}, +}; + +static int bq25980_watchdog_time[BQ25980_NUM_WD_VAL] = {5000, 10000, 50000, + 300000}; + +static int bq25980_get_input_curr_lim(struct bq25980_device *bq) +{ + unsigned int busocp_reg_code; + int ret; + + ret = regmap_read(bq->regmap, BQ25980_BUSOCP, &busocp_reg_code); + if (ret) + return ret; + + return (busocp_reg_code * BQ25980_BUSOCP_STEP_uA) + BQ25980_BUSOCP_OFFSET_uA; +} + +static int bq25980_set_hiz(struct bq25980_device *bq, int setting) +{ + return regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2, + BQ25980_EN_HIZ, setting); +} + +static int bq25980_set_input_curr_lim(struct bq25980_device *bq, int busocp) +{ + unsigned int busocp_reg_code; + int ret; + + if (!busocp) + return bq25980_set_hiz(bq, BQ25980_ENABLE_HIZ); + + bq25980_set_hiz(bq, BQ25980_DISABLE_HIZ); + + if (busocp < BQ25980_BUSOCP_MIN_uA) + busocp = BQ25980_BUSOCP_MIN_uA; + + if (bq->state.bypass) + busocp = min(busocp, bq->chip_info->busocp_sc_max); + else + busocp = min(busocp, bq->chip_info->busocp_byp_max); + + busocp_reg_code = (busocp - BQ25980_BUSOCP_OFFSET_uA) + / BQ25980_BUSOCP_STEP_uA; + + ret = regmap_write(bq->regmap, BQ25980_BUSOCP, busocp_reg_code); + if (ret) + return ret; + + return regmap_write(bq->regmap, BQ25980_BUSOCP_ALM, busocp_reg_code); +} + +static int bq25980_get_input_volt_lim(struct bq25980_device *bq) +{ + unsigned int busovp_reg_code; + unsigned int busovp_offset; + unsigned int busovp_step; + int ret; + + if (bq->state.bypass) { + busovp_step = bq->chip_info->busovp_byp_step; + busovp_offset = bq->chip_info->busovp_byp_offset; + } else { + busovp_step = bq->chip_info->busovp_sc_step; + busovp_offset = bq->chip_info->busovp_sc_offset; + } + + ret = regmap_read(bq->regmap, BQ25980_BUSOVP, &busovp_reg_code); + if (ret) + return ret; + + return (busovp_reg_code * busovp_step) + busovp_offset; +} + +static int bq25980_set_input_volt_lim(struct bq25980_device *bq, int busovp) +{ + unsigned int busovp_reg_code; + unsigned int busovp_step; + unsigned int busovp_offset; + int ret; + + if (bq->state.bypass) { + busovp_step = bq->chip_info->busovp_byp_step; + busovp_offset = bq->chip_info->busovp_byp_offset; + if (busovp > bq->chip_info->busovp_byp_max) + busovp = bq->chip_info->busovp_byp_max; + else if (busovp < bq->chip_info->busovp_byp_min) + busovp = bq->chip_info->busovp_byp_min; + } else { + busovp_step = bq->chip_info->busovp_sc_step; + busovp_offset = bq->chip_info->busovp_sc_offset; + if (busovp > bq->chip_info->busovp_sc_max) + busovp = bq->chip_info->busovp_sc_max; + else if (busovp < bq->chip_info->busovp_sc_min) + busovp = bq->chip_info->busovp_sc_min; + } + + busovp_reg_code = (busovp - busovp_offset) / busovp_step; + + ret = regmap_write(bq->regmap, BQ25980_BUSOVP, busovp_reg_code); + if (ret) + return ret; + + return regmap_write(bq->regmap, BQ25980_BUSOVP_ALM, busovp_reg_code); +} + +static int bq25980_get_const_charge_curr(struct bq25980_device *bq) +{ + unsigned int batocp_reg_code; + int ret; + + ret = regmap_read(bq->regmap, BQ25980_BATOCP, &batocp_reg_code); + if (ret) + return ret; + + return (batocp_reg_code & BQ25980_BATOCP_MASK) * + BQ25980_BATOCP_STEP_uA; +} + +static int bq25980_set_const_charge_curr(struct bq25980_device *bq, int batocp) +{ + unsigned int batocp_reg_code; + int ret; + + batocp = max(batocp, BQ25980_BATOCP_MIN_uA); + batocp = min(batocp, bq->chip_info->batocp_max); + + batocp_reg_code = batocp / BQ25980_BATOCP_STEP_uA; + + ret = regmap_update_bits(bq->regmap, BQ25980_BATOCP, + BQ25980_BATOCP_MASK, batocp_reg_code); + if (ret) + return ret; + + return regmap_update_bits(bq->regmap, BQ25980_BATOCP_ALM, + BQ25980_BATOCP_MASK, batocp_reg_code); +} + +static int bq25980_get_const_charge_volt(struct bq25980_device *bq) +{ + unsigned int batovp_reg_code; + int ret; + + ret = regmap_read(bq->regmap, BQ25980_BATOVP, &batovp_reg_code); + if (ret) + return ret; + + return ((batovp_reg_code * bq->chip_info->batovp_step) + + bq->chip_info->batovp_offset); +} + +static int bq25980_set_const_charge_volt(struct bq25980_device *bq, int batovp) +{ + unsigned int batovp_reg_code; + int ret; + + if (batovp < bq->chip_info->batovp_min) + batovp = bq->chip_info->batovp_min; + + if (batovp > bq->chip_info->batovp_max) + batovp = bq->chip_info->batovp_max; + + batovp_reg_code = (batovp - bq->chip_info->batovp_offset) / + bq->chip_info->batovp_step; + + ret = regmap_write(bq->regmap, BQ25980_BATOVP, batovp_reg_code); + if (ret) + return ret; + + return regmap_write(bq->regmap, BQ25980_BATOVP_ALM, batovp_reg_code); +} + +static int bq25980_set_bypass(struct bq25980_device *bq, bool en_bypass) +{ + int ret; + + if (en_bypass) + ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2, + BQ25980_EN_BYPASS, BQ25980_EN_BYPASS); + else + ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2, + BQ25980_EN_BYPASS, en_bypass); + if (ret) + return ret; + + bq->state.bypass = en_bypass; + + return bq->state.bypass; +} + +static int bq25980_set_chg_en(struct bq25980_device *bq, bool en_chg) +{ + int ret; + + if (en_chg) + ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2, + BQ25980_CHG_EN, BQ25980_CHG_EN); + else + ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2, + BQ25980_CHG_EN, en_chg); + if (ret) + return ret; + + bq->state.ce = en_chg; + + return 0; +} + +static int bq25980_get_adc_ibus(struct bq25980_device *bq) +{ + int ibus_adc_lsb, ibus_adc_msb; + u16 ibus_adc; + int ret; + + ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_MSB, &ibus_adc_msb); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_LSB, &ibus_adc_lsb); + if (ret) + return ret; + + ibus_adc = (ibus_adc_msb << 8) | ibus_adc_lsb; + + if (ibus_adc_msb & BQ25980_ADC_POLARITY_BIT) + return ((ibus_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA; + + return ibus_adc * BQ25980_ADC_CURR_STEP_uA; +} + +static int bq25980_get_adc_vbus(struct bq25980_device *bq) +{ + int vbus_adc_lsb, vbus_adc_msb; + u16 vbus_adc; + int ret; + + ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_MSB, &vbus_adc_msb); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_LSB, &vbus_adc_lsb); + if (ret) + return ret; + + vbus_adc = (vbus_adc_msb << 8) | vbus_adc_lsb; + + return vbus_adc * BQ25980_ADC_VOLT_STEP_uV; +} + +static int bq25980_get_ibat_adc(struct bq25980_device *bq) +{ + int ret; + int ibat_adc_lsb, ibat_adc_msb; + int ibat_adc; + + ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_LSB, &ibat_adc_lsb); + if (ret) + return ret; + + ibat_adc = (ibat_adc_msb << 8) | ibat_adc_lsb; + + if (ibat_adc_msb & BQ25980_ADC_POLARITY_BIT) + return ((ibat_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA; + + return ibat_adc * BQ25980_ADC_CURR_STEP_uA; +} + +static int bq25980_get_adc_vbat(struct bq25980_device *bq) +{ + int vsys_adc_lsb, vsys_adc_msb; + u16 vsys_adc; + int ret; + + ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_MSB, &vsys_adc_msb); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_LSB, &vsys_adc_lsb); + if (ret) + return ret; + + vsys_adc = (vsys_adc_msb << 8) | vsys_adc_lsb; + + return vsys_adc * BQ25980_ADC_VOLT_STEP_uV; +} + +static int bq25980_get_state(struct bq25980_device *bq, + struct bq25980_state *state) +{ + unsigned int chg_ctrl_2; + unsigned int stat1; + unsigned int stat2; + unsigned int stat3; + unsigned int stat4; + unsigned int ibat_adc_msb; + int ret; + + ret = regmap_read(bq->regmap, BQ25980_STAT1, &stat1); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_STAT2, &stat2); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_STAT3, &stat3); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_STAT4, &stat4); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_CHRGR_CTRL_2, &chg_ctrl_2); + if (ret) + return ret; + + ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb); + if (ret) + return ret; + + state->dischg = ibat_adc_msb & BQ25980_ADC_POLARITY_BIT; + state->ovp = (stat1 & BQ25980_STAT1_OVP_MASK) | + (stat3 & BQ25980_STAT3_OVP_MASK); + state->ocp = (stat1 & BQ25980_STAT1_OCP_MASK) | + (stat2 & BQ25980_STAT2_OCP_MASK); + state->tflt = stat4 & BQ25980_STAT4_TFLT_MASK; + state->wdt = stat4 & BQ25980_WD_STAT; + state->online = stat3 & BQ25980_PRESENT_MASK; + state->ce = chg_ctrl_2 & BQ25980_CHG_EN; + state->hiz = chg_ctrl_2 & BQ25980_EN_HIZ; + state->bypass = chg_ctrl_2 & BQ25980_EN_BYPASS; + + return 0; +} + +static int bq25980_get_battery_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct bq25980_device *bq = power_supply_get_drvdata(psy); + int ret = 0; + + switch (psp) { + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + val->intval = bq->init_data.ichg_max; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: + val->intval = bq->init_data.vreg_max; + break; + + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = bq25980_get_ibat_adc(bq); + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = bq25980_get_adc_vbat(bq); + if (ret < 0) + return ret; + + val->intval = ret; + break; + + default: + return -EINVAL; + } + + return ret; +} + +static int bq25980_set_charger_property(struct power_supply *psy, + enum power_supply_property prop, + const union power_supply_propval *val) +{ + struct bq25980_device *bq = power_supply_get_drvdata(psy); + int ret = -EINVAL; + + switch (prop) { + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + ret = bq25980_set_input_curr_lim(bq, val->intval); + if (ret) + return ret; + break; + + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: + ret = bq25980_set_input_volt_lim(bq, val->intval); + if (ret) + return ret; + break; + + case POWER_SUPPLY_PROP_CHARGE_TYPE: + ret = bq25980_set_bypass(bq, val->intval); + if (ret) + return ret; + break; + + case POWER_SUPPLY_PROP_STATUS: + ret = bq25980_set_chg_en(bq, val->intval); + if (ret) + return ret; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + ret = bq25980_set_const_charge_curr(bq, val->intval); + if (ret) + return ret; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + ret = bq25980_set_const_charge_volt(bq, val->intval); + if (ret) + return ret; + break; + + default: + return -EINVAL; + } + + return ret; +} + +static int bq25980_get_charger_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct bq25980_device *bq = power_supply_get_drvdata(psy); + struct bq25980_state state; + int ret = 0; + + mutex_lock(&bq->lock); + ret = bq25980_get_state(bq, &state); + mutex_unlock(&bq->lock); + if (ret) + return ret; + + switch (psp) { + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = BQ25980_MANUFACTURER; + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = bq->model_name; + break; + case POWER_SUPPLY_PROP_ONLINE: + val->intval = state.online; + break; + + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: + ret = bq25980_get_input_volt_lim(bq); + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + ret = bq25980_get_input_curr_lim(bq); + if (ret < 0) + return ret; + + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_HEALTH: + val->intval = POWER_SUPPLY_HEALTH_GOOD; + + if (state.tflt) + val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; + else if (state.ovp) + val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + else if (state.ocp) + val->intval = POWER_SUPPLY_HEALTH_OVERCURRENT; + else if (state.wdt) + val->intval = + POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE; + break; + + case POWER_SUPPLY_PROP_STATUS: + val->intval = POWER_SUPPLY_STATUS_UNKNOWN; + + if ((state.ce) && (!state.hiz)) + val->intval = POWER_SUPPLY_STATUS_CHARGING; + else if (state.dischg) + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + else if (!state.ce) + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + + case POWER_SUPPLY_PROP_CHARGE_TYPE: + val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; + + if (!state.ce) + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; + else if (state.bypass) + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; + else if (!state.bypass) + val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD; + break; + + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = bq25980_get_adc_ibus(bq); + if (ret < 0) + return ret; + + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = bq25980_get_adc_vbus(bq); + if (ret < 0) + return ret; + + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + ret = bq25980_get_const_charge_curr(bq); + if (ret < 0) + return ret; + + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + ret = bq25980_get_const_charge_volt(bq); + if (ret < 0) + return ret; + + val->intval = ret; + break; + + default: + return -EINVAL; + } + + return ret; +} + +static bool bq25980_state_changed(struct bq25980_device *bq, + struct bq25980_state *new_state) +{ + struct bq25980_state old_state; + + mutex_lock(&bq->lock); + old_state = bq->state; + mutex_unlock(&bq->lock); + + return (old_state.dischg != new_state->dischg || + old_state.ovp != new_state->ovp || + old_state.ocp != new_state->ocp || + old_state.online != new_state->online || + old_state.wdt != new_state->wdt || + old_state.tflt != new_state->tflt || + old_state.ce != new_state->ce || + old_state.hiz != new_state->hiz || + old_state.bypass != new_state->bypass); +} + +static irqreturn_t bq25980_irq_handler_thread(int irq, void *private) +{ + struct bq25980_device *bq = private; + struct bq25980_state state; + int ret; + + ret = bq25980_get_state(bq, &state); + if (ret < 0) + goto irq_out; + + if (!bq25980_state_changed(bq, &state)) + goto irq_out; + + mutex_lock(&bq->lock); + bq->state = state; + mutex_unlock(&bq->lock); + + power_supply_changed(bq->charger); + +irq_out: + return IRQ_HANDLED; +} + +static enum power_supply_property bq25980_power_supply_props[] = { + POWER_SUPPLY_PROP_MANUFACTURER, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_VOLTAGE_NOW, +}; + +static enum power_supply_property bq25980_battery_props[] = { + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_VOLTAGE_NOW, +}; + +static char *bq25980_charger_supplied_to[] = { + "main-battery", +}; + +static int bq25980_property_is_writeable(struct power_supply *psy, + enum power_supply_property prop) +{ + switch (prop) { + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + case POWER_SUPPLY_PROP_CHARGE_TYPE: + case POWER_SUPPLY_PROP_STATUS: + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: + return true; + default: + return false; + } +} + +static const struct power_supply_desc bq25980_power_supply_desc = { + .name = "bq25980-charger", + .type = POWER_SUPPLY_TYPE_MAINS, + .properties = bq25980_power_supply_props, + .num_properties = ARRAY_SIZE(bq25980_power_supply_props), + .get_property = bq25980_get_charger_property, + .set_property = bq25980_set_charger_property, + .property_is_writeable = bq25980_property_is_writeable, +}; + +static struct power_supply_desc bq25980_battery_desc = { + .name = "bq25980-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .get_property = bq25980_get_battery_property, + .properties = bq25980_battery_props, + .num_properties = ARRAY_SIZE(bq25980_battery_props), + .property_is_writeable = bq25980_property_is_writeable, +}; + + +static bool bq25980_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case BQ25980_CHRGR_CTRL_2: + case BQ25980_STAT1...BQ25980_FLAG5: + case BQ25980_ADC_CONTROL1...BQ25980_TDIE_ADC_LSB: + return true; + default: + return false; + } +} + +static const struct regmap_config bq25980_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = BQ25980_CHRGR_CTRL_6, + .reg_defaults = bq25980_reg_defs, + .num_reg_defaults = ARRAY_SIZE(bq25980_reg_defs), + .cache_type = REGCACHE_RBTREE, + .volatile_reg = bq25980_is_volatile_reg, +}; + +static const struct regmap_config bq25975_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = BQ25980_CHRGR_CTRL_6, + .reg_defaults = bq25975_reg_defs, + .num_reg_defaults = ARRAY_SIZE(bq25975_reg_defs), + .cache_type = REGCACHE_RBTREE, + .volatile_reg = bq25980_is_volatile_reg, +}; + +static const struct regmap_config bq25960_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = BQ25980_CHRGR_CTRL_6, + .reg_defaults = bq25960_reg_defs, + .num_reg_defaults = ARRAY_SIZE(bq25960_reg_defs), + .cache_type = REGCACHE_RBTREE, + .volatile_reg = bq25980_is_volatile_reg, +}; + +static const struct bq25980_chip_info bq25980_chip_info_tbl[] = { + [BQ25980] = { + .model_id = BQ25980, + .regmap_config = &bq25980_regmap_config, + + .busocp_def = BQ25980_BUSOCP_DFLT_uA, + .busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA, + .busocp_sc_max = BQ25980_BUSOCP_SC_MAX_uA, + .busocp_byp_max = BQ25980_BUSOCP_BYP_MAX_uA, + .busocp_byp_min = BQ25980_BUSOCP_MIN_uA, + + .busovp_sc_def = BQ25980_BUSOVP_DFLT_uV, + .busovp_byp_def = BQ25980_BUSOVP_BYPASS_DFLT_uV, + .busovp_sc_step = BQ25980_BUSOVP_SC_STEP_uV, + .busovp_sc_offset = BQ25980_BUSOVP_SC_OFFSET_uV, + .busovp_byp_step = BQ25980_BUSOVP_BYP_STEP_uV, + .busovp_byp_offset = BQ25980_BUSOVP_BYP_OFFSET_uV, + .busovp_sc_min = BQ25980_BUSOVP_SC_MIN_uV, + .busovp_sc_max = BQ25980_BUSOVP_SC_MAX_uV, + .busovp_byp_min = BQ25980_BUSOVP_BYP_MIN_uV, + .busovp_byp_max = BQ25980_BUSOVP_BYP_MAX_uV, + + .batovp_def = BQ25980_BATOVP_DFLT_uV, + .batovp_max = BQ25980_BATOVP_MAX_uV, + .batovp_min = BQ25980_BATOVP_MIN_uV, + .batovp_step = BQ25980_BATOVP_STEP_uV, + .batovp_offset = BQ25980_BATOVP_OFFSET_uV, + + .batocp_def = BQ25980_BATOCP_DFLT_uA, + .batocp_max = BQ25980_BATOCP_MAX_uA, + }, + + [BQ25975] = { + .model_id = BQ25975, + .regmap_config = &bq25975_regmap_config, + + .busocp_def = BQ25975_BUSOCP_DFLT_uA, + .busocp_sc_min = BQ25975_BUSOCP_SC_MAX_uA, + .busocp_sc_max = BQ25975_BUSOCP_SC_MAX_uA, + .busocp_byp_min = BQ25980_BUSOCP_MIN_uA, + .busocp_byp_max = BQ25975_BUSOCP_BYP_MAX_uA, + + .busovp_sc_def = BQ25975_BUSOVP_DFLT_uV, + .busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV, + .busovp_sc_step = BQ25975_BUSOVP_SC_STEP_uV, + .busovp_sc_offset = BQ25975_BUSOVP_SC_OFFSET_uV, + .busovp_byp_step = BQ25975_BUSOVP_BYP_STEP_uV, + .busovp_byp_offset = BQ25975_BUSOVP_BYP_OFFSET_uV, + .busovp_sc_min = BQ25975_BUSOVP_SC_MIN_uV, + .busovp_sc_max = BQ25975_BUSOVP_SC_MAX_uV, + .busovp_byp_min = BQ25975_BUSOVP_BYP_MIN_uV, + .busovp_byp_max = BQ25975_BUSOVP_BYP_MAX_uV, + + .batovp_def = BQ25975_BATOVP_DFLT_uV, + .batovp_max = BQ25975_BATOVP_MAX_uV, + .batovp_min = BQ25975_BATOVP_MIN_uV, + .batovp_step = BQ25975_BATOVP_STEP_uV, + .batovp_offset = BQ25975_BATOVP_OFFSET_uV, + + .batocp_def = BQ25980_BATOCP_DFLT_uA, + .batocp_max = BQ25980_BATOCP_MAX_uA, + }, + + [BQ25960] = { + .model_id = BQ25960, + .regmap_config = &bq25960_regmap_config, + + .busocp_def = BQ25960_BUSOCP_DFLT_uA, + .busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA, + .busocp_sc_max = BQ25960_BUSOCP_SC_MAX_uA, + .busocp_byp_min = BQ25960_BUSOCP_SC_MAX_uA, + .busocp_byp_max = BQ25960_BUSOCP_BYP_MAX_uA, + + .busovp_sc_def = BQ25975_BUSOVP_DFLT_uV, + .busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV, + .busovp_sc_step = BQ25960_BUSOVP_SC_STEP_uV, + .busovp_sc_offset = BQ25960_BUSOVP_SC_OFFSET_uV, + .busovp_byp_step = BQ25960_BUSOVP_BYP_STEP_uV, + .busovp_byp_offset = BQ25960_BUSOVP_BYP_OFFSET_uV, + .busovp_sc_min = BQ25960_BUSOVP_SC_MIN_uV, + .busovp_sc_max = BQ25960_BUSOVP_SC_MAX_uV, + .busovp_byp_min = BQ25960_BUSOVP_BYP_MIN_uV, + .busovp_byp_max = BQ25960_BUSOVP_BYP_MAX_uV, + + .batovp_def = BQ25960_BATOVP_DFLT_uV, + .batovp_max = BQ25960_BATOVP_MAX_uV, + .batovp_min = BQ25960_BATOVP_MIN_uV, + .batovp_step = BQ25960_BATOVP_STEP_uV, + .batovp_offset = BQ25960_BATOVP_OFFSET_uV, + + .batocp_def = BQ25960_BATOCP_DFLT_uA, + .batocp_max = BQ25960_BATOCP_MAX_uA, + }, +}; + +static int bq25980_power_supply_init(struct bq25980_device *bq, + struct device *dev) +{ + struct power_supply_config psy_cfg = { .drv_data = bq, + .of_node = dev->of_node, }; + + psy_cfg.supplied_to = bq25980_charger_supplied_to; + psy_cfg.num_supplicants = ARRAY_SIZE(bq25980_charger_supplied_to); + + bq->charger = devm_power_supply_register(bq->dev, + &bq25980_power_supply_desc, + &psy_cfg); + if (IS_ERR(bq->charger)) + return -EINVAL; + + bq->battery = devm_power_supply_register(bq->dev, + &bq25980_battery_desc, + &psy_cfg); + if (IS_ERR(bq->battery)) + return -EINVAL; + + return 0; +} + +static int bq25980_hw_init(struct bq25980_device *bq) +{ + struct power_supply_battery_info bat_info = { }; + int wd_reg_val = BQ25980_WATCHDOG_DIS; + int wd_max_val = BQ25980_NUM_WD_VAL - 1; + int ret = 0; + int curr_val; + int volt_val; + int i; + + if (bq->watchdog_timer) { + if (bq->watchdog_timer >= bq25980_watchdog_time[wd_max_val]) + wd_reg_val = wd_max_val; + else { + for (i = 0; i < wd_max_val; i++) { + if (bq->watchdog_timer > bq25980_watchdog_time[i] && + bq->watchdog_timer < bq25980_watchdog_time[i + 1]) { + wd_reg_val = i; + break; + } + } + } + } + + ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_3, + BQ25980_WATCHDOG_MASK, wd_reg_val); + if (ret) + return ret; + + ret = power_supply_get_battery_info(bq->charger, &bat_info); + if (ret) { + dev_warn(bq->dev, "battery info missing\n"); + return -EINVAL; + } + + bq->init_data.ichg_max = bat_info.constant_charge_current_max_ua; + bq->init_data.vreg_max = bat_info.constant_charge_voltage_max_uv; + + if (bq->state.bypass) { + ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2, + BQ25980_EN_BYPASS, BQ25980_EN_BYPASS); + if (ret) + return ret; + + curr_val = bq->init_data.bypass_ilim; + volt_val = bq->init_data.bypass_vlim; + } else { + curr_val = bq->init_data.sc_ilim; + volt_val = bq->init_data.sc_vlim; + } + + ret = bq25980_set_input_curr_lim(bq, curr_val); + if (ret) + return ret; + + ret = bq25980_set_input_volt_lim(bq, volt_val); + if (ret) + return ret; + + return regmap_update_bits(bq->regmap, BQ25980_ADC_CONTROL1, + BQ25980_ADC_EN, BQ25980_ADC_EN); +} + +static int bq25980_parse_dt(struct bq25980_device *bq) +{ + int ret; + + ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms", + &bq->watchdog_timer); + if (ret) + bq->watchdog_timer = BQ25980_WATCHDOG_MIN; + + if (bq->watchdog_timer > BQ25980_WATCHDOG_MAX || + bq->watchdog_timer < BQ25980_WATCHDOG_MIN) + return -EINVAL; + + ret = device_property_read_u32(bq->dev, + "ti,sc-ovp-limit-microvolt", + &bq->init_data.sc_vlim); + if (ret) + bq->init_data.sc_vlim = bq->chip_info->busovp_sc_def; + + if (bq->init_data.sc_vlim > bq->chip_info->busovp_sc_max || + bq->init_data.sc_vlim < bq->chip_info->busovp_sc_min) { + dev_err(bq->dev, "SC ovp limit is out of range\n"); + return -EINVAL; + } + + ret = device_property_read_u32(bq->dev, + "ti,sc-ocp-limit-microamp", + &bq->init_data.sc_ilim); + if (ret) + bq->init_data.sc_ilim = bq->chip_info->busocp_def; + + if (bq->init_data.sc_ilim > bq->chip_info->busocp_sc_max || + bq->init_data.sc_ilim < bq->chip_info->busocp_sc_min) { + dev_err(bq->dev, "SC ocp limit is out of range\n"); + return -EINVAL; + } + + ret = device_property_read_u32(bq->dev, + "ti,bypass-ovp-limit-microvolt", + &bq->init_data.bypass_vlim); + if (ret) + bq->init_data.bypass_vlim = bq->chip_info->busovp_byp_def; + + if (bq->init_data.bypass_vlim > bq->chip_info->busovp_byp_max || + bq->init_data.bypass_vlim < bq->chip_info->busovp_byp_min) { + dev_err(bq->dev, "Bypass ovp limit is out of range\n"); + return -EINVAL; + } + + ret = device_property_read_u32(bq->dev, + "ti,bypass-ocp-limit-microamp", + &bq->init_data.bypass_ilim); + if (ret) + bq->init_data.bypass_ilim = bq->chip_info->busocp_def; + + if (bq->init_data.bypass_ilim > bq->chip_info->busocp_byp_max || + bq->init_data.bypass_ilim < bq->chip_info->busocp_byp_min) { + dev_err(bq->dev, "Bypass ocp limit is out of range\n"); + return -EINVAL; + } + + + bq->state.bypass = device_property_read_bool(bq->dev, + "ti,bypass-enable"); + return 0; +} + +static int bq25980_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct bq25980_device *bq; + int ret; + + bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL); + if (!bq) + return -ENOMEM; + + bq->client = client; + bq->dev = dev; + + mutex_init(&bq->lock); + + strncpy(bq->model_name, id->name, I2C_NAME_SIZE); + bq->chip_info = &bq25980_chip_info_tbl[id->driver_data]; + + bq->regmap = devm_regmap_init_i2c(client, + bq->chip_info->regmap_config); + if (IS_ERR(bq->regmap)) { + dev_err(dev, "Failed to allocate register map\n"); + return PTR_ERR(bq->regmap); + } + + i2c_set_clientdata(client, bq); + + ret = bq25980_parse_dt(bq); + if (ret) { + dev_err(dev, "Failed to read device tree properties%d\n", ret); + return ret; + } + + if (client->irq) { + ret = devm_request_threaded_irq(dev, client->irq, NULL, + bq25980_irq_handler_thread, + IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + dev_name(&client->dev), bq); + if (ret) + return ret; + } + + ret = bq25980_power_supply_init(bq, dev); + if (ret) { + dev_err(dev, "Failed to register power supply\n"); + return ret; + } + + ret = bq25980_hw_init(bq); + if (ret) { + dev_err(dev, "Cannot initialize the chip.\n"); + return ret; + } + + return 0; +} + +static const struct i2c_device_id bq25980_i2c_ids[] = { + { "bq25980", BQ25980 }, + { "bq25975", BQ25975 }, + { "bq25975", BQ25975 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, bq25980_i2c_ids); + +static const struct of_device_id bq25980_of_match[] = { + { .compatible = "ti,bq25980", .data = (void *)BQ25980 }, + { .compatible = "ti,bq25975", .data = (void *)BQ25975 }, + { .compatible = "ti,bq25960", .data = (void *)BQ25960 }, + { }, +}; +MODULE_DEVICE_TABLE(of, bq25980_of_match); + +static struct i2c_driver bq25980_driver = { + .driver = { + .name = "bq25980-charger", + .of_match_table = bq25980_of_match, + }, + .probe = bq25980_probe, + .id_table = bq25980_i2c_ids, +}; +module_i2c_driver(bq25980_driver); + +MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); +MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>"); +MODULE_DESCRIPTION("bq25980 charger driver"); +MODULE_LICENSE("GPL v2"); |