Introduce the bq2515x family of chargers. The BQ2515X family of devices are highly integrated battery management ICs that integrate the most common functions for wearable devices namely a charger, an output voltage rail, ADC for battery and system monitoring, and a push-button controller. Datasheets: bq25150 - http://www.ti.com/lit/ds/symlink/bq25150.pdf bq25155 - http://www.ti.com/lit/ds/symlink/bq25155.pdf Signed-off-by: Ricardo Rivera-Matos <r-rivera-matos@xxxxxx> --- drivers/power/supply/Kconfig | 13 + drivers/power/supply/Makefile | 1 + drivers/power/supply/bq2515x_charger.c | 1169 ++++++++++++++++++++++++ 3 files changed, 1183 insertions(+) create mode 100644 drivers/power/supply/bq2515x_charger.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 44d3c8512fb8..faf2830aa152 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -610,6 +610,19 @@ config CHARGER_BQ24735 help Say Y to enable support for the TI BQ24735 battery charger. +config CHARGER_BQ2515X + tristate "TI BQ2515X battery charger family" + depends on I2C + depends on GPIOLIB || COMPILE_TEST + select REGMAP_I2C + help + Say Y to enable support for the TI BQ2515X family of battery + charging integrated circuits. The BQ2515X are highly integrated + battery charge management ICs that integrate the most common + functions for wearable devices, namely a charger, an output voltage + rail, ADC for battery and system monitoring, and push-button + controller. + config CHARGER_BQ25890 tristate "TI BQ25890 battery charger driver" depends on I2C diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index b9644663e435..b3c694a65114 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -82,6 +82,7 @@ obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o obj-$(CONFIG_CHARGER_BQ24257) += bq24257_charger.o obj-$(CONFIG_CHARGER_BQ24735) += bq24735-charger.o +obj-$(CONFIG_CHARGER_BQ2515X) += bq2515x_charger.o obj-$(CONFIG_CHARGER_BQ25890) += bq25890_charger.o obj-$(CONFIG_CHARGER_SMB347) += smb347-charger.o obj-$(CONFIG_CHARGER_TPS65090) += tps65090-charger.o diff --git a/drivers/power/supply/bq2515x_charger.c b/drivers/power/supply/bq2515x_charger.c new file mode 100644 index 000000000000..63e8e317af56 --- /dev/null +++ b/drivers/power/supply/bq2515x_charger.c @@ -0,0 +1,1169 @@ +// SPDX-License-Identifier: GPL-2.0 +// BQ2515X 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/kernel.h> +#include <linux/module.h> +#include <linux/gpio/consumer.h> +#include <linux/power_supply.h> +#include <linux/regmap.h> +#include <linux/types.h> + +#define BQ2515X_MANUFACTURER "Texas Instruments" + +#define BQ2515X_STAT0 0x00 +#define BQ2515X_STAT1 0x01 +#define BQ2515X_STAT2 0x02 +#define BQ2515X_FLAG0 0x03 +#define BQ2515X_FLAG1 0x04 +#define BQ2515X_FLAG2 0x05 +#define BQ2515X_FLAG3 0x06 +#define BQ2515X_MASK0 0x07 +#define BQ2515X_MASK1 0x08 +#define BQ2515X_MASK2 0x09 +#define BQ2515X_MASK3 0x0a +#define BQ2515X_VBAT_CTRL 0x12 +#define BQ2515X_ICHG_CTRL 0x13 +#define BQ2515X_PCHRGCTRL 0x14 +#define BQ2515X_TERMCTRL 0x15 +#define BQ2515X_BUVLO 0x16 +#define BQ2515X_CHARGERCTRL0 0x17 +#define BQ2515X_CHARGERCTRL1 0x18 +#define BQ2515X_ILIMCTRL 0x19 +#define BQ2515X_LDOCTRL 0x1d +#define BQ2515X_MRCTRL 0x30 +#define BQ2515X_ICCTRL0 0x35 +#define BQ2515X_ICCTRL1 0x36 +#define BQ2515X_ICCTRL2 0x37 +#define BQ2515X_ADCCTRL0 0x40 +#define BQ2515X_ADCCTRL1 0x41 +#define BQ2515X_ADC_VBAT_M 0x42 +#define BQ2515X_ADC_VBAT_L 0x43 +#define BQ2515X_ADC_TS_M 0x44 +#define BQ2515X_ADC_TS_L 0x45 +#define BQ2515X_ADC_ICHG_M 0x46 +#define BQ2515X_ADC_ICHG_L 0x47 +#define BQ2515X_ADC_ADCIN_M 0x48 +#define BQ2515X_ADC_ADCIN_L 0x49 +#define BQ2515X_ADC_VIN_M 0x4a +#define BQ2515X_ADC_VIN_L 0x4b +#define BQ2515X_ADC_PMID_M 0x4c +#define BQ2515X_ADC_PMID_L 0x4d +#define BQ2515X_ADC_IIN_M 0x4e +#define BQ2515X_ADC_IIN_L 0x4f +#define BQ2515X_ADC_COMP1_M 0x52 +#define BQ2515X_ADC_COMP1_L 0X53 +#define BQ2515X_ADC_COMP2_M 0X54 +#define BQ2515X_ADC_COMP2_L 0x55 +#define BQ2515X_ADC_COMP3_M 0x56 +#define BQ2515X_ADC_COMP3_L 0x57 +#define BQ2515X_ADC_READ_EN 0x58 +#define BQ2515X_TS_FASTCHGCTRL 0x61 +#define BQ2515X_TS_COLD 0x62 +#define BQ2515X_TS_COOL 0x63 +#define BQ2515X_TS_WARM 0x64 +#define BQ2515X_TS_HOT 0x65 +#define BQ2515X_DEVICE_ID 0x6f + +#define BQ2515X_DEFAULT_ICHG_UA 10000 +#define BQ25150_DEFAULT_ILIM_UA 100000 +#define BQ25155_DEFAULT_ILIM_UA 500000 +#define BQ2515X_DEFAULT_VBAT_REG_UV 4200000 +#define BQ2515X_DEFAULT_IPRECHARGE_UA 2500 + +#define BQ2515X_DIVISOR 65536 +#define BQ2515X_VBAT_BASE_VOLT 3600000 +#define BQ2515X_VBAT_REG_MAX 4600000 +#define BQ2515X_VBAT_REG_MIN 3600000 +#define BQ2515X_VBAT_STEP_UV 10000 +#define BQ2515X_UV_FACTOR 1000000 +#define BQ2515X_VBAT_MULTIPLIER 6 +#define BQ2515X_ICHG_DIVISOR 52429 +#define BQ2515X_ICHG_CURR_STEP_THRESH_UA 318750 +#define BQ2515X_ICHG_MIN_UA 0 +#define BQ2515X_ICHG_MAX_UA 500000 +#define BQ2515X_ICHG_RNG_1B0_UA 1250 +#define BQ2515X_ICHG_RNG_1B1_UA 2500 +#define BQ2515X_VLOWV_SEL_1B0_UV 3000000 +#define BQ2515X_VLOWV_SEL_1B1_UV 2800000 +#define BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA 18750 +#define BQ2515X_PRECHRG_ICHRG_RNGE_3750_UA 37500 +#define BQ2515X_TWAKE2_MIN_US 1700000 +#define BQ2515X_TWAKE2_MAX_US 2300000 + +#define BQ2515X_ILIM_150MA 0x2 +#define BQ2515X_ILIM_MASK 0x7 +#define BQ2515X_ILIM_MIN 50000 +#define BQ2515X_ILIM_MAX 600000 +#define BQ2515X_HEALTH_MASK 0xf +#define BQ2515X_ICHGRNG_MASK 0x80 +#define BQ2515X_STAT0_MASK 0x0f +#define BQ2515X_STAT1_MASK 0x1f +#define BQ2515X_PRECHARGE_MASK 0x1f + +#define BQ2515X_TS_HOT_STAT BIT(0) +#define BQ2515X_TS_WARM_STAT BIT(1) +#define BQ2515X_TS_COOL_STAT BIT(2) +#define BQ2515X_TS_COLD_STAT BIT(3) +#define BQ2515X_SAFETY_TIMER_EXP BIT(5) + +#define BQ2515X_EN_VBAT_READ BIT(3) +#define BQ2515X_EN_ICHG_READ BIT(5) + +#define BQ2515X_VIN_GOOD BIT(0) +#define BQ2515X_CHRG_DONE BIT(5) +#define BQ2515X_CV_CHRG_MODE BIT(6) + +#define BQ2515X_VIN_OVP_FAULT_STAT BIT(7) + +#define BQ2515X_WATCHDOG_DISABLE BIT(4) + +#define BQ2515X_ICHARGE_RANGE BIT(7) + +#define BQ2515X_VLOWV_SEL BIT(5) + +#define BQ2515X_CHARGER_DISABLE BIT(0) + +#define BQ2515X_HWRESET_14S_WD BIT(1) + +static const int bq2515x_ilim_lvl_values[] = { + 50000, 100000, 150000, 200000, 300000, 400000, 500000, 600000 +}; + +/** + * struct bq2515x_init_data - + * @ilim: input current limit + * @ichg: fast charge current + * @vbatreg: battery regulation voltage + * @iprechg: precharge current + */ +struct bq2515x_init_data { + int ilim; + int ichg; + int vbatreg; + int iprechg; +}; + +enum bq2515x_id { + BQ25150, + BQ25155, +}; + +/** + * struct bq2515x_device - + * @mains: mains properties + * @battery: battery properties + * @regmap: register map structure + * @dev: device structure + * + * @reset_gpio: manual reset (MR) pin + * @powerdown_gpio: low power mode pin + * @ac_detect_gpio: power good (PG) pin + * @ce_gpio: charge enable (CE) pin + * + * @model_name: string value describing device model + * @device_id: value of device_id + * @mains_online: boolean value indicating power supply online + * + * @bq2515x_init_data init_data: charger initialization data structure + */ +struct bq2515x_device { + struct power_supply *mains; + struct power_supply *battery; + struct regmap *regmap; + struct device *dev; + + struct gpio_desc *reset_gpio; + struct gpio_desc *powerdown_gpio; + struct gpio_desc *ac_detect_gpio; + struct gpio_desc *ce_gpio; + + char model_name[I2C_NAME_SIZE]; + int device_id; + bool mains_online; + + struct bq2515x_init_data init_data; +}; + +static struct reg_default bq25150_reg_defaults[] = { + {BQ2515X_FLAG0, 0x0}, + {BQ2515X_FLAG1, 0x0}, + {BQ2515X_FLAG2, 0x0}, + {BQ2515X_FLAG3, 0x0}, + {BQ2515X_MASK0, 0x0}, + {BQ2515X_MASK1, 0x0}, + {BQ2515X_MASK2, 0x71}, + {BQ2515X_MASK3, 0x0}, + {BQ2515X_VBAT_CTRL, 0x3C}, + {BQ2515X_ICHG_CTRL, 0x8}, + {BQ2515X_PCHRGCTRL, 0x2}, + {BQ2515X_TERMCTRL, 0x14}, + {BQ2515X_BUVLO, 0x0}, + {BQ2515X_CHARGERCTRL0, 0x82}, + {BQ2515X_CHARGERCTRL1, 0x42}, + {BQ2515X_ILIMCTRL, 0x1}, + {BQ2515X_LDOCTRL, 0xB0}, + {BQ2515X_MRCTRL, 0x2A}, + {BQ2515X_ICCTRL0, 0x10}, + {BQ2515X_ICCTRL1, 0x0}, + {BQ2515X_ICCTRL2, 0x0}, + {BQ2515X_ADCCTRL0, 0x2}, + {BQ2515X_ADCCTRL1, 0x40}, + {BQ2515X_ADC_COMP1_M, 0x23}, + {BQ2515X_ADC_COMP1_L, 0x20}, + {BQ2515X_ADC_COMP2_M, 0x38}, + {BQ2515X_ADC_COMP2_L, 0x90}, + {BQ2515X_ADC_COMP3_M, 0x0}, + {BQ2515X_ADC_COMP3_L, 0x0}, + {BQ2515X_ADC_READ_EN, 0x0}, + {BQ2515X_TS_FASTCHGCTRL, 0x34}, + {BQ2515X_TS_COLD, 0x7C}, + {BQ2515X_TS_COOL, 0x6D}, + {BQ2515X_TS_WARM, 0x38}, + {BQ2515X_TS_HOT, 0x27}, + {BQ2515X_DEVICE_ID, 0x20}, +}; + +static struct reg_default bq25155_reg_defaults[] = { + {BQ2515X_FLAG0, 0x0}, + {BQ2515X_FLAG1, 0x0}, + {BQ2515X_FLAG2, 0x0}, + {BQ2515X_FLAG3, 0x0}, + {BQ2515X_MASK0, 0x0}, + {BQ2515X_MASK1, 0x0}, + {BQ2515X_MASK2, 0x71}, + {BQ2515X_MASK3, 0x0}, + {BQ2515X_VBAT_CTRL, 0x3C}, + {BQ2515X_ICHG_CTRL, 0x8}, + {BQ2515X_PCHRGCTRL, 0x2}, + {BQ2515X_TERMCTRL, 0x14}, + {BQ2515X_BUVLO, 0x0}, + {BQ2515X_CHARGERCTRL0, 0x82}, + {BQ2515X_CHARGERCTRL1, 0xC2}, + {BQ2515X_ILIMCTRL, 0x6}, + {BQ2515X_LDOCTRL, 0xB0}, + {BQ2515X_MRCTRL, 0x2A}, + {BQ2515X_ICCTRL0, 0x10}, + {BQ2515X_ICCTRL1, 0x0}, + {BQ2515X_ICCTRL2, 0x40}, + {BQ2515X_ADCCTRL0, 0x2}, + {BQ2515X_ADCCTRL1, 0x40}, + {BQ2515X_ADC_COMP1_M, 0x23}, + {BQ2515X_ADC_COMP1_L, 0x20}, + {BQ2515X_ADC_COMP2_M, 0x38}, + {BQ2515X_ADC_COMP2_L, 0x90}, + {BQ2515X_ADC_COMP3_M, 0x0}, + {BQ2515X_ADC_COMP3_L, 0x0}, + {BQ2515X_ADC_READ_EN, 0x0}, + {BQ2515X_TS_FASTCHGCTRL, 0x34}, + {BQ2515X_TS_COLD, 0x7C}, + {BQ2515X_TS_COOL, 0x6D}, + {BQ2515X_TS_WARM, 0x38}, + {BQ2515X_TS_HOT, 0x27}, + {BQ2515X_DEVICE_ID, 0x35}, +}; + +static int bq2515x_wake_up(struct bq2515x_device *bq2515x) +{ + int ret; + int val; + + /* Read the STAT register if we can read it then the device is out + * of ship mode. If the register cannot be read then attempt to wake + * it up and enable the ADC. + */ + ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val); + if (ret) + return ret; + + /* Need to toggle LP and bring device out of ship mode. The device + * will exit the ship mode when the MR pin is held low for at least + * t_WAKE2 as shown in section 8.3.7.1 of the datasheet. + */ + gpiod_set_value_cansleep(bq2515x->powerdown_gpio, 0); + + gpiod_set_value_cansleep(bq2515x->reset_gpio, 0); + usleep_range(BQ2515X_TWAKE2_MIN_US, BQ2515X_TWAKE2_MAX_US); + gpiod_set_value_cansleep(bq2515x->reset_gpio, 1); + + return regmap_write(bq2515x->regmap, BQ2515X_ADC_READ_EN, + (BQ2515X_EN_VBAT_READ | BQ2515X_EN_ICHG_READ)); +} + +static int bq2515x_update_ps_status(struct bq2515x_device *bq2515x) +{ + bool dc = false; + unsigned int val; + int ret; + + if (bq2515x->ac_detect_gpio) + val = gpiod_get_value_cansleep(bq2515x->ac_detect_gpio); + else { + ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val); + if (ret) + return ret; + } + + dc = val & BQ2515X_VIN_GOOD; + + ret = bq2515x->mains_online != dc; + + bq2515x->mains_online = dc; + + return ret; +} + +static int bq2515x_disable_watchdog_timers(struct bq2515x_device *bq2515x) +{ + int ret; + + ret = regmap_update_bits(bq2515x->regmap, BQ2515X_CHARGERCTRL0, + BQ2515X_WATCHDOG_DISABLE, BQ2515X_WATCHDOG_DISABLE); + if (ret) + return ret; + + return regmap_update_bits(bq2515x->regmap, BQ2515X_ICCTRL2, + BQ2515X_HWRESET_14S_WD, 0); +} + +static int bq2515x_get_battery_voltage_now(struct bq2515x_device *bq2515x) +{ + int ret; + int vbat_msb; + int vbat_lsb; + uint32_t vbat_measurement; + + if (!bq2515x->mains_online) + bq2515x_wake_up(bq2515x); + + ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_M, &vbat_msb); + if (ret) + return ret; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_L, &vbat_lsb); + if (ret) + return ret; + + vbat_measurement = (vbat_msb << 8) | vbat_lsb; + + return vbat_measurement * (BQ2515X_UV_FACTOR / BQ2515X_DIVISOR) * + BQ2515X_VBAT_MULTIPLIER; +} + +static int bq2515x_get_battery_current_now(struct bq2515x_device *bq2515x) +{ + int ret; + int ichg_msb; + int ichg_lsb; + uint32_t ichg_measurement; + u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA; + unsigned int ichg_reg_code, reg_code; + unsigned int icharge_range = 0, pchrgctrl; + unsigned int buvlo, vlowv_sel, vlowv = BQ2515X_VLOWV_SEL_1B0_UV; + + if (!bq2515x->mains_online) + return -ENODATA; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_ICHG_M, &ichg_msb); + if (ret) + return ret; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_ICHG_L, &ichg_lsb); + if (ret) + return ret; + + ichg_measurement = (ichg_msb << 8) | ichg_lsb; + + ret = regmap_read(bq2515x->regmap, BQ2515X_BUVLO, &buvlo); + if (ret) + return ret; + + vlowv_sel = buvlo & BQ2515X_VLOWV_SEL; + + if (vlowv_sel) + vlowv = BQ2515X_VLOWV_SEL_1B1_UV; + + if (bq2515x_get_battery_voltage_now(bq2515x) < vlowv) { + ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, + &pchrgctrl); + if (ret) + return ret; + + reg_code = pchrgctrl & BQ2515X_PRECHARGE_MASK; + } else { + ret = regmap_read(bq2515x->regmap, BQ2515X_ICHG_CTRL, + &ichg_reg_code); + if (ret) + return ret; + + reg_code = ichg_reg_code; + } + + ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl); + if (ret) + return ret; + + icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE; + + if (icharge_range) + ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA; + + return reg_code * (ichg_multiplier * ichg_measurement / + BQ2515X_ICHG_DIVISOR); +} + +static bool bq2515x_get_charge_disable(struct bq2515x_device *bq2515x) +{ + int ret; + int ce_pin; + int icctrl2; + int charger_disable; + + ce_pin = gpiod_get_value_cansleep(bq2515x->ce_gpio); + + ret = regmap_read(bq2515x->regmap, BQ2515X_ICCTRL2, &icctrl2); + if (ret) + return ret; + + charger_disable = icctrl2 & BQ2515X_CHARGER_DISABLE; + + if (charger_disable || ce_pin) + return true; + + return false; +} + +static int bq2515x_set_charge_disable(struct bq2515x_device *bq2515x, int val) +{ + gpiod_set_value_cansleep(bq2515x->ce_gpio, val); + + return regmap_update_bits(bq2515x->regmap, BQ2515X_ICCTRL2, + BQ2515X_CHARGER_DISABLE, val); +} + +static int bq2515x_get_const_charge_current(struct bq2515x_device *bq2515x) +{ + int ret; + u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA; + unsigned int ichg_reg_code; + unsigned int pchrgctrl; + unsigned int icharge_range; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ICHG_CTRL, &ichg_reg_code); + if (ret) + return ret; + + ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl); + if (ret) + return ret; + + icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE; + + if (icharge_range) + ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA; + + return ichg_reg_code * ichg_multiplier; +} + +static int bq2515x_set_const_charge_current(struct bq2515x_device *bq2515x, + int val) +{ + int ret; + unsigned int ichg_reg_code; + u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA; + unsigned int icharge_range = 0; + + if (val > BQ2515X_ICHG_MAX_UA || val < BQ2515X_ICHG_MIN_UA) + return -EINVAL; + + if (val > BQ2515X_ICHG_CURR_STEP_THRESH_UA) { + ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA; + icharge_range = BQ2515X_ICHARGE_RANGE; + } + + bq2515x_set_charge_disable(bq2515x, 1); + + ret = regmap_update_bits(bq2515x->regmap, BQ2515X_PCHRGCTRL, + BQ2515X_ICHARGE_RANGE, icharge_range); + if (ret) + return ret; + + ichg_reg_code = val / ichg_multiplier; + + ret = regmap_write(bq2515x->regmap, BQ2515X_ICHG_CTRL, ichg_reg_code); + if (ret) + return ret; + + return bq2515x_set_charge_disable(bq2515x, 0); +} + +static int bq2515x_get_precharge_current(struct bq2515x_device *bq2515x) +{ + int ret; + unsigned int pchrgctrl; + unsigned int icharge_range; + u16 precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA; + unsigned int precharge_reg_code; + + ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl); + if (ret) + return ret; + + icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE; + + if (icharge_range) + precharge_multiplier = BQ2515X_ICHG_RNG_1B1_UA; + + precharge_reg_code = pchrgctrl & BQ2515X_PRECHARGE_MASK; + + return precharge_reg_code * precharge_multiplier; +} + +static int bq2515x_set_precharge_current(struct bq2515x_device *bq2515x, + int val) +{ + int ret; + unsigned int pchrgctrl; + unsigned int icharge_range; + unsigned int precharge_reg_code; + unsigned int precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA; + unsigned int precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA; + + ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl); + if (ret) + return ret; + + icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE; + + if (icharge_range) { + precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_3750_UA; + precharge_multiplier = BQ2515X_ICHG_RNG_1B1_UA; + } else { + precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA; + precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA; + } + if (val > precharge_max_ua || val < BQ2515X_ICHG_MIN_UA) + return -EINVAL; + + precharge_reg_code = val / precharge_multiplier; + + ret = bq2515x_set_charge_disable(bq2515x, 1); + if (ret) + return ret; + + ret = regmap_update_bits(bq2515x->regmap, BQ2515X_PCHRGCTRL, + BQ2515X_PRECHARGE_MASK, precharge_reg_code); + if (ret) + return ret; + + return bq2515x_set_charge_disable(bq2515x, 0); +} + +static int bq2515x_charging_status(struct bq2515x_device *bq2515x, + union power_supply_propval *val) +{ + bool status0_no_fault; + bool status1_no_fault; + bool ce_status; + bool charge_done; + unsigned int status; + int ret; + + if (!bq2515x->mains_online) { + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + return 0; + } + + ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &status); + if (ret) + return ret; + + /* + * The code block below is used to determine if any faults from the + * STAT0 register are disbaling charging or if the charge has completed + * according to the CHARGE_DONE_STAT bit. + */ + if (((status & BQ2515X_STAT0_MASK) == true) & + ((status & BQ2515X_CHRG_DONE) == false)) { + status0_no_fault = true; + charge_done = false; + } else if (status & BQ2515X_CHRG_DONE) { + charge_done = true; + status0_no_fault = false; + } else { + status0_no_fault = false; + charge_done = false; + } + + ret = regmap_read(bq2515x->regmap, BQ2515X_STAT1, &status); + if (ret) + return ret; + /* + * The code block below is used to determine if any faults from the + * STAT1 register are disbaling charging + */ + if ((status & BQ2515X_STAT1_MASK) == false) + status1_no_fault = true; + else + status1_no_fault = false; + + ce_status = (!bq2515x_get_charge_disable(bq2515x)); + + /* + * If there are no faults and charging is enabled, then status is + * charging. Otherwise, if charging is complete, then status is full. + * Otherwise, if a fault exists or charging is disabled, then status is + * not charging + */ + if (status0_no_fault & status1_no_fault & ce_status) + val->intval = POWER_SUPPLY_STATUS_CHARGING; + else if (charge_done) + val->intval = POWER_SUPPLY_STATUS_FULL; + else if (!(status0_no_fault & status1_no_fault & ce_status)) + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + + return 0; +} + +static int bq2515x_get_batt_reg(struct bq2515x_device *bq2515x) +{ + int vbat_reg_code; + int ret; + + ret = regmap_read(bq2515x->regmap, BQ2515X_VBAT_CTRL, &vbat_reg_code); + if (ret) + return ret; + + return BQ2515X_VBAT_BASE_VOLT + vbat_reg_code * BQ2515X_VBAT_STEP_UV; +} + +static int bq2515x_set_batt_reg(struct bq2515x_device *bq2515x, int val) +{ + int vbat_reg_code; + + if (val > BQ2515X_VBAT_REG_MAX || val < BQ2515X_VBAT_REG_MIN) + return -EINVAL; + + vbat_reg_code = (val - BQ2515X_VBAT_BASE_VOLT) / BQ2515X_VBAT_STEP_UV; + + return regmap_write(bq2515x->regmap, BQ2515X_VBAT_CTRL, vbat_reg_code); +} + +static int bq2515x_get_ilim_lvl(struct bq2515x_device *bq2515x) +{ + int ret; + int ilimctrl; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ILIMCTRL, &ilimctrl); + if (ret) + return ret; + + return bq2515x_ilim_lvl_values[ilimctrl & BQ2515X_ILIM_MASK]; +} + +static int bq2515x_set_ilim_lvl(struct bq2515x_device *bq2515x, int val) +{ + int i = 0; + unsigned int array_size = ARRAY_SIZE(bq2515x_ilim_lvl_values); + + for (i = array_size - 1; i > 0; i--) { + if (val >= bq2515x_ilim_lvl_values[i]) + break; + } + return regmap_write(bq2515x->regmap, BQ2515X_ILIMCTRL, i); +} + +static int bq2515x_power_supply_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_PRECHARGE_CURRENT: + return true; + default: + return false; + } +} + +static int bq2515x_charger_get_health(struct bq2515x_device *bq2515x, + union power_supply_propval *val) +{ + int health = POWER_SUPPLY_HEALTH_GOOD; + int ret; + unsigned int stat1; + unsigned int flag3; + + if (!bq2515x->mains_online) + bq2515x_wake_up(bq2515x); + + ret = regmap_read(bq2515x->regmap, BQ2515X_FLAG3, &flag3); + if (ret) + return ret; + + ret = regmap_read(bq2515x->regmap, BQ2515X_STAT1, &stat1); + if (ret) + return ret; + + if (stat1 & BQ2515X_HEALTH_MASK) { + switch (stat1 & BQ2515X_HEALTH_MASK) { + case BQ2515X_TS_HOT_STAT: + health = POWER_SUPPLY_HEALTH_HOT; + break; + case BQ2515X_TS_WARM_STAT: + health = POWER_SUPPLY_HEALTH_WARM; + break; + case BQ2515X_TS_COOL_STAT: + health = POWER_SUPPLY_HEALTH_COOL; + break; + case BQ2515X_TS_COLD_STAT: + health = POWER_SUPPLY_HEALTH_COLD; + break; + default: + health = POWER_SUPPLY_HEALTH_UNKNOWN; + break; + } + } + + if (stat1 & BQ2515X_VIN_OVP_FAULT_STAT) + health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + + if (flag3 & BQ2515X_SAFETY_TIMER_EXP) + health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; + + val->intval = health; + return 0; +} + +static int bq2515x_mains_set_property(struct power_supply *psy, + enum power_supply_property prop, + const union power_supply_propval *val) +{ + struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy); + int ret; + + switch (prop) { + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + ret = bq2515x_set_batt_reg(bq2515x, val->intval); + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + ret = bq2515x_set_const_charge_current(bq2515x, val->intval); + break; + + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + ret = bq2515x_set_ilim_lvl(bq2515x, val->intval); + break; + + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: + ret = bq2515x_set_precharge_current(bq2515x, val->intval); + break; + + default: + return -EINVAL; + } + + return ret; +} + +static int bq2515x_mains_get_property(struct power_supply *psy, + enum power_supply_property prop, + union power_supply_propval *val) +{ + struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy); + int ret = 0; + + switch (prop) { + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + ret = bq2515x_get_const_charge_current(bq2515x); + if (ret < 0) + return ret; + + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + ret = bq2515x_get_batt_reg(bq2515x); + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: + ret = bq2515x_get_precharge_current(bq2515x); + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_ONLINE: + val->intval = bq2515x->mains_online; + break; + + case POWER_SUPPLY_PROP_HEALTH: + ret = bq2515x_charger_get_health(bq2515x, val); + if (ret) + val->intval = POWER_SUPPLY_HEALTH_UNKNOWN; + break; + + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + ret = bq2515x_get_ilim_lvl(bq2515x); + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = bq2515x->model_name; + break; + + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = BQ2515X_MANUFACTURER; + break; + + case POWER_SUPPLY_PROP_STATUS: + ret = bq2515x_charging_status(bq2515x, val); + if (ret) + return ret; + break; + + default: + return -EINVAL; + } + + return ret; +} + +static int bq2515x_battery_get_property(struct power_supply *psy, + enum power_supply_property prop, + union power_supply_propval *val) +{ + struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy); + int ret; + + ret = bq2515x_update_ps_status(bq2515x); + if (ret) + return ret; + + switch (prop) { + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: + ret = bq2515x->init_data.vbatreg; + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + ret = bq2515x->init_data.ichg; + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = bq2515x_get_battery_voltage_now(bq2515x); + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = bq2515x_get_battery_current_now(bq2515x); + if (ret < 0) + return ret; + val->intval = ret; + break; + + default: + return -EINVAL; + } + return 0; +} + +static enum power_supply_property bq2515x_battery_properties[] = { + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, +}; + +static enum power_supply_property bq2515x_mains_properties[] = { + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, + POWER_SUPPLY_PROP_PRECHARGE_CURRENT, +}; + +static struct power_supply_desc bq2515x_mains_desc = { + .name = "bq2515x-mains", + .type = POWER_SUPPLY_TYPE_MAINS, + .get_property = bq2515x_mains_get_property, + .set_property = bq2515x_mains_set_property, + .properties = bq2515x_mains_properties, + .num_properties = ARRAY_SIZE(bq2515x_mains_properties), + .property_is_writeable = bq2515x_power_supply_property_is_writeable, +}; + +static struct power_supply_desc bq2515x_battery_desc = { + .name = "bq2515x-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .get_property = bq2515x_battery_get_property, + .properties = bq2515x_battery_properties, + .num_properties = ARRAY_SIZE(bq2515x_battery_properties), + .property_is_writeable = bq2515x_power_supply_property_is_writeable, +}; + +static int bq2515x_power_supply_register(struct bq2515x_device *bq2515x, + struct device *dev, struct power_supply_config psy_cfg) +{ + bq2515x->mains = devm_power_supply_register(bq2515x->dev, + &bq2515x_mains_desc, + &psy_cfg); + if (IS_ERR(bq2515x->mains)) + return -EINVAL; + + bq2515x->battery = devm_power_supply_register(bq2515x->dev, + &bq2515x_battery_desc, + &psy_cfg); + if (IS_ERR(bq2515x->battery)) + return -EINVAL; + + return 0; +} + +static int bq2515x_hw_init(struct bq2515x_device *bq2515x) +{ + int ret; + struct power_supply_battery_info bat_info = { }; + + ret = bq2515x_disable_watchdog_timers(bq2515x); + if (ret) + return ret; + + if (bq2515x->init_data.ilim) { + ret = bq2515x_set_ilim_lvl(bq2515x, bq2515x->init_data.ilim); + if (ret) + return ret; + } + + ret = power_supply_get_battery_info(bq2515x->mains, &bat_info); + if (ret) { + dev_warn(bq2515x->dev, "battery info missing, default values will be applied\n"); + + bq2515x->init_data.ichg = BQ2515X_DEFAULT_ICHG_UA; + + bq2515x->init_data.vbatreg = BQ2515X_DEFAULT_VBAT_REG_UV; + + bq2515x->init_data.iprechg = BQ2515X_DEFAULT_IPRECHARGE_UA; + + } else { + bq2515x->init_data.ichg = + bat_info.constant_charge_current_max_ua; + + bq2515x->init_data.vbatreg = + bat_info.constant_charge_voltage_max_uv; + + bq2515x->init_data.iprechg = + bat_info.precharge_current_ua; + } + + ret = bq2515x_set_const_charge_current(bq2515x, + bq2515x->init_data.ichg); + if (ret) + return ret; + + ret = bq2515x_set_batt_reg(bq2515x, bq2515x->init_data.vbatreg); + if (ret) + return ret; + + return bq2515x_set_precharge_current(bq2515x, + bq2515x->init_data.iprechg); +} + +static int bq2515x_read_properties(struct bq2515x_device *bq2515x) +{ + int ret; + + ret = device_property_read_u32(bq2515x->dev, + "input-current-limit-microamp", + &bq2515x->init_data.ilim); + if (ret) { + switch (bq2515x->device_id) { + case BQ25150: + bq2515x->init_data.ilim = BQ25150_DEFAULT_ILIM_UA; + break; + case BQ25155: + bq2515x->init_data.ilim = BQ25155_DEFAULT_ILIM_UA; + break; + } + } + + bq2515x->ac_detect_gpio = devm_gpiod_get_optional(bq2515x->dev, + "ac-detect", GPIOD_IN); + if (IS_ERR(bq2515x->ac_detect_gpio)) { + ret = PTR_ERR(bq2515x->ac_detect_gpio); + dev_err(bq2515x->dev, "Failed to get ac detect"); + return ret; + } + + bq2515x->reset_gpio = devm_gpiod_get_optional(bq2515x->dev, + "reset", GPIOD_OUT_LOW); + if (IS_ERR(bq2515x->reset_gpio)) { + ret = PTR_ERR(bq2515x->reset_gpio); + dev_err(bq2515x->dev, "Failed to get reset"); + return ret; + } + + bq2515x->powerdown_gpio = devm_gpiod_get_optional(bq2515x->dev, + "powerdown", GPIOD_OUT_LOW); + if (IS_ERR(bq2515x->powerdown_gpio)) { + ret = PTR_ERR(bq2515x->powerdown_gpio); + dev_err(bq2515x->dev, "Failed to get powerdown"); + return ret; + } + + bq2515x->ce_gpio = devm_gpiod_get_optional(bq2515x->dev, + "charge-enable", + GPIOD_OUT_LOW); + if (IS_ERR(bq2515x->ce_gpio)) { + ret = PTR_ERR(bq2515x->ce_gpio); + dev_err(bq2515x->dev, "Failed to get ce"); + return ret; + } + + return 0; +} + +static bool bq2515x_volatile_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case BQ2515X_STAT0 ... BQ2515X_FLAG3: + case BQ2515X_ADC_VBAT_M ... BQ2515X_ADC_IIN_L: + return true; + default: + return false; + } +} + +static const struct regmap_config bq25150_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = BQ2515X_DEVICE_ID, + .reg_defaults = bq25150_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(bq25150_reg_defaults), + .cache_type = REGCACHE_RBTREE, + .volatile_reg = bq2515x_volatile_register, +}; + +static const struct regmap_config bq25155_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = BQ2515X_DEVICE_ID, + .reg_defaults = bq25155_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(bq25155_reg_defaults), + .cache_type = REGCACHE_RBTREE, + .volatile_reg = bq2515x_volatile_register, +}; + +static int bq2515x_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct bq2515x_device *bq2515x; + struct power_supply_config charger_cfg = {}; + int ret; + + bq2515x = devm_kzalloc(dev, sizeof(*bq2515x), GFP_KERNEL); + if (!bq2515x) + return -ENOMEM; + + bq2515x->dev = dev; + + strncpy(bq2515x->model_name, id->name, I2C_NAME_SIZE); + + bq2515x->device_id = id->driver_data; + + switch (bq2515x->device_id) { + case BQ25150: + bq2515x->regmap = devm_regmap_init_i2c(client, + &bq25150_regmap_config); + break; + case BQ25155: + bq2515x->regmap = devm_regmap_init_i2c(client, + &bq25155_regmap_config); + break; + } + + if (IS_ERR(bq2515x->regmap)) { + dev_err(dev, "failed to allocate register map\n"); + return PTR_ERR(bq2515x->regmap); + } + + i2c_set_clientdata(client, bq2515x); + + charger_cfg.drv_data = bq2515x; + charger_cfg.of_node = dev->of_node; + + ret = bq2515x_read_properties(bq2515x); + if (ret) { + dev_err(dev, "Failed to read device tree properties %d\n", + ret); + return ret; + } + + ret = bq2515x_power_supply_register(bq2515x, dev, charger_cfg); + if (ret) { + dev_err(dev, "failed to register power supply\n"); + return ret; + } + + ret = bq2515x_hw_init(bq2515x); + if (ret) { + dev_err(dev, "Cannot initialize the chip\n"); + return ret; + } + + return 0; +} + +static const struct i2c_device_id bq2515x_i2c_ids[] = { + { "bq25150", BQ25150, }, + { "bq25155", BQ25155, }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, bq2515x_i2c_ids); + +static const struct of_device_id bq2515x_of_match[] = { + { .compatible = "ti,bq25150", }, + { .compatible = "ti,bq25155", }, + { }, +}; +MODULE_DEVICE_TABLE(of, bq2515x_of_match); + +static struct i2c_driver bq2515x_driver = { + .driver = { + .name = "bq2515x-charger", + .of_match_table = bq2515x_of_match, + }, + .probe = bq2515x_probe, + .id_table = bq2515x_i2c_ids, +}; +module_i2c_driver(bq2515x_driver); + +MODULE_AUTHOR("Dan Murphy <dmurphy@xxxxxx>"); +MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@xxxxxx>"); +MODULE_DESCRIPTION("BQ2515X charger driver"); +MODULE_LICENSE("GPL v2"); -- 2.27.0
