[3/3] power: supply: bq2515x: Introduce the bq2515x family

Message ID	20190930143137.21624-3-dmurphy@ti.com
State	New
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; From: Dan Murphy <dmurphy@ti.com> To: <sre@kernel.org>, <linux-pm@vger.kernel.org> CC: <linux-kernel@vger.kernel.org>, Dan Murphy <dmurphy@ti.com> Subject: [PATCH 3/3] power: supply: bq2515x: Introduce the bq2515x family Date: Mon, 30 Sep 2019 09:31:37 -0500 Message-ID: <20190930143137.21624-3-dmurphy@ti.com> In-Reply-To: <20190930143137.21624-1-dmurphy@ti.com> References: <20190930143137.21624-1-dmurphy@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk
Series	None \| expand [2/3] dt: power: Add the bq2515x family dt bindings [3/3] power: supply: bq2515x: Introduce the bq2515x family

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index c84a7b1caeb6..d6228516fc70 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -589,6 +589,14 @@ 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 battery charger. + 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 6c7da920ea83..8fcc175a7e22 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -80,6 +80,7 @@ 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..211a8b8e44d9 --- /dev/null +++ b/drivers/power/supply/bq2515x_charger.c @@ -0,0 +1,743 @@ +// SPDX-License-Identifier: GPL-2.0 +// BQ2515X Battery Charger Driver +// Copyright (C) 2019 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/of_gpio.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_DIVISOR 65536 +#define BQ2515X_VBAT_BASE_VOLT 3600 +#define BQ2515X_VBAT_REG_MAX 4600 +#define BQ2515X_VBAT_REG_MIN 3600 + +#define BQ2515X_ILIM_150MA 0x2 +#define BQ2515X_ILIM_MASK 0x7 +#define BQ2515X_HEALTH_MASK 0xf +#define BQ2515X_OVERVOLT_MASK 0x80 + +#define BQ2515X_HOT_FLAG BIT(0) +#define BQ2515X_WARM_FLAG BIT(1) +#define BQ2515X_COOL_FLAG BIT(2) +#define BQ2515X_COLD_FLAG BIT(3) +#define BQ2515X_SAFETY_TIMER_EXP BIT(5) + +#define BQ2515X_VIN_GOOD BIT(0) +#define BQ2515X_CHRG_DONE BIT(5) +#define BQ2515X_CV_CHRG_MODE BIT(6) + +static const int bq2515x_ilim_lvl_values[] = { + 50, 100, 150, 200, 300, 400, 500, 600 +}; + +/* initial field values, converted to register values */ +struct bq2515x_init_data { + u8 ichg; /* charge current */ + u8 vreg; /* regulation voltage */ + u8 iterm; /* termination current */ + u8 iprechg; /* precharge current */ + u8 sysvmin; /* minimum system voltage limit */ + u8 ilim; /* ILIM current contol */ +}; + +struct bq2515x_device { + struct power_supply *mains; + struct power_supply *battery; + struct i2c_client *client; + struct regmap *regmap; + struct device *dev; + struct mutex lock; + + struct gpio_desc *reset_gpio; + struct gpio_desc *lp_gpio; + struct gpio_desc *pg_gpio; + struct gpio_desc *ce_gpio; + + char model_name[I2C_NAME_SIZE]; + int mains_online; + + uint32_t voltage_min_design; + uint32_t voltage_max_design; + uint32_t charge_full_design; + + struct bq2515x_init_data init_data; +}; + +static struct reg_default bq2515x_reg_defs[] = { + {BQ2515X_STAT0, 0xff}, + {BQ2515X_STAT1, 0x0}, + {BQ2515X_STAT2, 0x0}, + {BQ2515X_FLAG0, 0x0}, + {BQ2515X_FLAG1, 0x0}, + {BQ2515X_FLAG2, 0x0}, + {BQ2515X_FLAG3, 0x0}, + {BQ2515X_MASK0, 0x0}, + {BQ2515X_MASK1, 0x0}, + {BQ2515X_MASK2, 0x0}, + {BQ2515X_MASK3, 0x0}, +}; + +static bool bq2515x_is_ps_online(struct bq2515x_device *bq2515x) +{ + return bq2515x->mains_online; +} + +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 MR here */ + if (bq2515x->lp_gpio) + gpiod_direction_output(bq2515x->lp_gpio, 1); + + if (bq2515x->reset_gpio) { + gpiod_direction_output(bq2515x->lp_gpio, 0); + mdelay(2000); + gpiod_direction_output(bq2515x->lp_gpio, 1); + } + + return regmap_write(bq2515x->regmap, BQ2515X_ADC_READ_EN, BIT(3)); +} + +static int bq2515x_update_ps_status(struct bq2515x_device *bq2515x) +{ + bool dc = false; + unsigned int val; + int ret; + + if (bq2515x->pg_gpio) + val = gpiod_get_value(bq2515x->pg_gpio); + else { + ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val); + if (ret < 0) + return ret; + } + + dc = val & BQ2515X_VIN_GOOD; + + ret = bq2515x->mains_online != dc; + + bq2515x->mains_online = dc; + + return ret; +} + +static int get_const_charge_current(struct bq2515x_device *bq2515x) +{ + int ret; + int intval; + int iin_msb; + int iin_lsb; + u16 ichg_measurement; + int ilim_val, ichg_multiplier; + + if (!bq2515x_is_ps_online(bq2515x)) + return -ENODATA; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_IIN_M, &iin_msb); + if (ret < 0) + return ret; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_IIN_L, &iin_lsb); + if (ret < 0) + return ret; + + ichg_measurement = (iin_msb << 8) | iin_lsb; + ret = regmap_read(bq2515x->regmap, BQ2515X_ILIMCTRL, &ilim_val); + if (ret < 0) + return ret; + + if (ilim_val >= BQ2515X_ILIM_150MA) + ichg_multiplier = 350; + else + ichg_multiplier = 750; + + intval = (ichg_measurement * 100 / BQ2515X_DIVISOR) * ichg_multiplier; + return intval / 100; +} + +static int get_const_charge_voltage(struct bq2515x_device *bq2515x) +{ + int ret; + int intval; + int vin_msb; + int vin_lsb; + u16 vbat_measurement; + + if (!bq2515x_is_ps_online(bq2515x)) + bq2515x_wake_up(bq2515x); + + ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_M, &vin_msb); + if (ret) + return ret; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_L, &vin_lsb); + if (ret) + return ret; + + vbat_measurement = (vin_msb << 8) | vin_lsb; + intval = ((vbat_measurement * 10000) / BQ2515X_DIVISOR) * 6; + return intval / 10; +} + +static int bq2515x_charging_status(struct bq2515x_device *bq2515x, + union power_supply_propval *val) +{ + unsigned int status; + int ret; + + if (!bq2515x_is_ps_online(bq2515x)) + return 0; + + ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &status); + if (ret) { + val->intval = POWER_SUPPLY_STATUS_UNKNOWN; + return ret; + } + + if (status & BQ2515X_CV_CHRG_MODE && status & BQ2515X_VIN_GOOD) + val->intval = POWER_SUPPLY_STATUS_CHARGING; + else if (status & BQ2515X_CHRG_DONE) + val->intval = POWER_SUPPLY_STATUS_FULL; + else if (status & BQ2515X_VIN_GOOD) + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + else + val->intval = POWER_SUPPLY_STATUS_UNKNOWN; + + return ret; +} + +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 * 10; +} + +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) / 10; + + return regmap_write(bq2515x->regmap, BQ2515X_VBAT_CTRL, vbat_reg_code); +} + +static int bq2515x_get_ilim_lvl(struct bq2515x_device *bq2515x) +{ + int ret; + int val; + + ret = regmap_read(bq2515x->regmap, BQ2515X_ILIMCTRL, &val); + if (ret) + return ret; + + return bq2515x_ilim_lvl_values[val & BQ2515X_ILIM_MASK]; +} + +static int bq2515x_set_ilim_lvl(struct bq2515x_device *bq2515x, int val) +{ + int i; + + for (i = 0; i <= ARRAY_SIZE(bq2515x_ilim_lvl_values); i++) { + if (val == bq2515x_ilim_lvl_values[i]) + break; + + if (val > bq2515x_ilim_lvl_values[i - 1] && + val < bq2515x_ilim_lvl_values[i]) { + if (val - bq2515x_ilim_lvl_values[i - 1] < + bq2515x_ilim_lvl_values[i] - val) { + i = i - 1; + 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_CHARGE_NOW: + return true; + default: + return false; + } +} + +static int bq2515x_charger_get_health(struct bq2515x_device *bq2515x, + union power_supply_propval *val) +{ + int health; + int ret; + int v; + + if (!bq2515x_is_ps_online(bq2515x)) + bq2515x_wake_up(bq2515x); + + ret = regmap_read(bq2515x->regmap, BQ2515X_FLAG1, &v); + if (ret) + return -EIO; + + if (v & BQ2515X_HEALTH_MASK) { + switch (v & BQ2515X_HEALTH_MASK) { + case BQ2515X_HOT_FLAG: + health = POWER_SUPPLY_HEALTH_OVERHEAT; + break; + case BQ2515X_WARM_FLAG: + health = POWER_SUPPLY_HEALTH_WARM; + break; + case BQ2515X_COOL_FLAG: + health = POWER_SUPPLY_HEALTH_COOL; + break; + case BQ2515X_COLD_FLAG: + health = POWER_SUPPLY_HEALTH_COLD; + break; + default: + health = POWER_SUPPLY_HEALTH_UNKNOWN; + } + } else if (v & BQ2515X_OVERVOLT_MASK) { + health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + } else { + health = POWER_SUPPLY_HEALTH_GOOD; + } + + ret = regmap_read(bq2515x->regmap, BQ2515X_FLAG3, &v); + if (v & BQ2515X_SAFETY_TIMER_EXP) + health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; + + val->intval = health; + + return 0; +} + +static int bq2515x_set_charge_enable(struct bq2515x_device *bq2515x, int val) +{ + if (bq2515x->ce_gpio) + gpiod_set_value(bq2515x->ce_gpio, val); + + return 0; +} + +static int bq2515x_get_charge_enable(struct bq2515x_device *bq2515x) +{ + int charge_value; + + if (bq2515x->ce_gpio) + charge_value = gpiod_get_value(bq2515x->ce_gpio); + else + return -EINVAL; + + return charge_value; +} + +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_INPUT_CURRENT_LIMIT: + ret = bq2515x_set_ilim_lvl(bq2515x, val->intval); + break; + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + ret = bq2515x_set_batt_reg(bq2515x, val->intval); + break; + case POWER_SUPPLY_PROP_CHARGE_NOW: + ret = bq2515x_set_charge_enable(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; + + switch (prop) { + case POWER_SUPPLY_PROP_ONLINE: + val->intval = bq2515x->mains_online; + break; + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + ret = get_const_charge_current(bq2515x); + if (ret < 0) + return ret; + + val->intval = ret; + 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_CONSTANT_CHARGE_VOLTAGE: + ret = bq2515x_get_batt_reg(bq2515x); + if (ret < 0) + return ret; + + val->intval = ret; + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = bq2515x->model_name; + ret = 0; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = BQ2515X_MANUFACTURER; + ret = 0; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + val->intval = BQ2515X_VBAT_REG_MAX; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN: + val->intval = BQ2515X_VBAT_REG_MIN; + break; + case POWER_SUPPLY_PROP_CHARGE_NOW: + ret = bq2515x_get_charge_enable(bq2515x); + if (ret < 0) + return ret; + + val->intval = ret; + break; + default: + return -EINVAL; + } + + return 0; +} + +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 < 0) + return ret; + + switch (prop) { + case POWER_SUPPLY_PROP_STATUS: + if (!bq2515x_is_ps_online(bq2515x)) { + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + break; + } + + ret = bq2515x_charging_status(bq2515x, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = get_const_charge_voltage(bq2515x); + if (ret < 0) + return ret; + + val->intval = ret; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: + val->intval = bq2515x->voltage_min_design; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: + val->intval = bq2515x->voltage_max_design; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: + val->intval = bq2515x->charge_full_design; + break; + case POWER_SUPPLY_PROP_HEALTH: + ret = bq2515x_charger_get_health(bq2515x, val); + if (ret) + val->intval = POWER_SUPPLY_HEALTH_UNKNOWN; + break; + default: + return -EINVAL; + } + + return 0; +} + +static enum power_supply_property bq2515x_battery_properties[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, +}; + +static enum power_supply_property bq2515x_charger_properties[] = { + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, + POWER_SUPPLY_PROP_VOLTAGE_MAX, + POWER_SUPPLY_PROP_VOLTAGE_MIN, + POWER_SUPPLY_PROP_CHARGE_NOW, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +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_charger_properties, + .num_properties = ARRAY_SIZE(bq2515x_charger_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), +}; + + +static int bq2515x_power_supply_register(struct bq2515x_device *bq2515x) +{ + struct power_supply_config psy_cfg = { .drv_data = bq2515x, }; + int ret = -EINVAL; + + bq2515x->mains = devm_power_supply_register(bq2515x->dev, + &bq2515x_mains_desc, + &psy_cfg); + if (IS_ERR(bq2515x->mains)) + return ret; + + bq2515x->battery = devm_power_supply_register(bq2515x->dev, + &bq2515x_battery_desc, + &psy_cfg); + if (IS_ERR(bq2515x->battery)) { + power_supply_unregister(bq2515x->mains); + return ret; + } + + return 0; +} + +static int bq2515x_hw_init(struct bq2515x_device *bq2515x) +{ + int ret = 0; + + if (bq2515x->init_data.ichg) + ret = bq2515x_set_ilim_lvl(bq2515x, bq2515x->init_data.ichg); + + if (bq2515x->init_data.vreg) + ret = bq2515x_set_batt_reg(bq2515x, bq2515x->init_data.vreg); + + return ret; +} + +static int bq2515x_read_properties(struct bq2515x_device *bq2515x) +{ + int ret; + + ret = device_property_read_u8(bq2515x->dev, "ti,charge-current", + &bq2515x->init_data.ichg); + if (ret) + goto fail; + + ret = device_property_read_u8(bq2515x->dev, + "ti,battery-regulation-voltage", + &bq2515x->init_data.vreg); + if (ret) + goto fail; + + bq2515x->pg_gpio = devm_gpiod_get_optional(bq2515x->dev, + "pg", GPIOD_IN); + if (IS_ERR(bq2515x->pg_gpio)) + dev_info(bq2515x->dev, "PG GPIO not defined"); + + bq2515x->reset_gpio = devm_gpiod_get_optional(bq2515x->dev, + "reset", GPIOD_OUT_LOW); + if (IS_ERR(bq2515x->reset_gpio)) + dev_info(bq2515x->dev, "reset GPIO not defined"); + + bq2515x->lp_gpio = devm_gpiod_get_optional(bq2515x->dev, "low-power", + GPIOD_OUT_LOW); + if (IS_ERR(bq2515x->lp_gpio)) + dev_info(bq2515x->dev, "LP GPIO not defined"); + + bq2515x->ce_gpio = devm_gpiod_get_optional(bq2515x->dev, + "charge-enable", + GPIOD_OUT_HIGH); + if (IS_ERR(bq2515x->ce_gpio)) + dev_info(bq2515x->dev, "Charge enable GPIO not defined"); + +fail: + return ret; +} + +static const struct regmap_config bq2515x_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = BQ2515X_DEVICE_ID, + .reg_defaults = bq2515x_reg_defs, + .num_reg_defaults = ARRAY_SIZE(bq2515x_reg_defs), + .cache_type = REGCACHE_RBTREE, +}; + +static int bq2515x_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct bq2515x_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); + + bq->regmap = devm_regmap_init_i2c(client, &bq2515x_regmap_config); + if (IS_ERR(bq->regmap)) { + dev_err(dev, "failed to allocate register map\n"); + return PTR_ERR(bq->regmap); + } + + strncpy(bq->model_name, id->name, I2C_NAME_SIZE); + + i2c_set_clientdata(client, bq); + + ret = bq2515x_read_properties(bq); + if (ret < 0) { + dev_err(dev, "Failed to register power supply\n"); + return ret; + } + + ret = bq2515x_hw_init(bq); + if (ret < 0) { + dev_err(dev, "Cannot initialize the chip.\n"); + return ret; + } + + return bq2515x_power_supply_register(bq); +} + +static const struct i2c_device_id bq2515x_i2c_ids[] = { + { "bq25150", 0 }, + { "bq25155", 1 }, + {}, +}; +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 = of_match_ptr(bq2515x_of_match), + }, + .probe = bq2515x_probe, + .id_table = bq2515x_i2c_ids, +}; +module_i2c_driver(bq2515x_driver); + +MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); +MODULE_DESCRIPTION("BQ2515X charger driver"); +MODULE_LICENSE("GPL v2");

[3/3] power: supply: bq2515x: Introduce the bq2515x family

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Patch