| // SPDX-License-Identifier: GPL-2.0 |
| // BQ2515X Battery Charger Driver |
| // Copyright (C) 2020 Texas Instruments Incorporated - https://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; |
| }; |
| |
| /** |
| * struct bq2515x_info - |
| * @regmap_config: register map config |
| * @ilim: input current limit |
| */ |
| struct bq2515x_info { |
| const struct regmap_config *regmap_config; |
| int ilim; |
| }; |
| |
| /** |
| * 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 |
| * |
| * @info: device info |
| * @model_name: string value describing device model |
| * @mains_online: boolean value indicating power supply online |
| * |
| * @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; |
| |
| const struct bq2515x_info *info; |
| char model_name[I2C_NAME_SIZE]; |
| bool mains_online; |
| |
| struct bq2515x_init_data init_data; |
| }; |
| |
| static const 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 const 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 const 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 const 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 const 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 const 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) |
| bq2515x->init_data.ilim = bq2515x->info->ilim; |
| |
| 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 = i2c_client_get_device_id(client); |
| 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; |
| |
| strscpy(bq2515x->model_name, id->name, sizeof(bq2515x->model_name)); |
| |
| bq2515x->info = i2c_get_match_data(client); |
| bq2515x->regmap = devm_regmap_init_i2c(client, |
| bq2515x->info->regmap_config); |
| 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 bq2515x_info bq25150 = { |
| .regmap_config = &bq25150_regmap_config, |
| .ilim = BQ25150_DEFAULT_ILIM_UA, |
| }; |
| |
| static const struct bq2515x_info bq25155 = { |
| .regmap_config = &bq25155_regmap_config, |
| .ilim = BQ25155_DEFAULT_ILIM_UA, |
| }; |
| |
| static const struct i2c_device_id bq2515x_i2c_ids[] = { |
| { "bq25150", (kernel_ulong_t)&bq25150 }, |
| { "bq25155", (kernel_ulong_t)&bq25155 }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(i2c, bq2515x_i2c_ids); |
| |
| static const struct of_device_id bq2515x_of_match[] = { |
| { .compatible = "ti,bq25150", .data = &bq25150 }, |
| { .compatible = "ti,bq25155", .data = &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@ti.com>"); |
| MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>"); |
| MODULE_DESCRIPTION("BQ2515X charger driver"); |
| MODULE_LICENSE("GPL v2"); |
