[PATCH v4 4/4] power: supply: bq2515x: Introduce the bq2515x family

Dan Murphy
2020-01-16T17:53:56Z

Introduce the bq25150 and bq25155 supply chargers.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/power/supply/Kconfig | 8 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/bq2515x_charger.c | 739 +++++++++++++++++++++++++
3 files changed, 748 insertions(+)
create mode 100644 drivers/power/supply/bq2515x_charger.c

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 27164a1d3c7c..ee9f4b29e0b7 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..dbf84bef4976
--- /dev/null
+++ b/drivers/power/supply/bq2515x_charger.c
@@ -0,0 +1,739 @@
+// 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 3600000
+#define BQ2515X_VBAT_REG_MAX 4600000
+#define BQ2515X_VBAT_REG_MIN 3600000
+#define BQ2515X_UV_FACTOR 10000
+
+#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[] = {
+ 50000, 100000, 150000, 200000, 300000, 400000, 500000, 600000
+};
+
+/* initial field values, converted to register values */
+struct bq2515x_init_data {
+ int ichg; /* charge current */
+ int vreg; /* regulation voltage */
+};
+
+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 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;
+
+ return (ichg_measurement * 100 / BQ2515X_DIVISOR) * ichg_multiplier;
+}
+
+static int get_const_charge_voltage(struct bq2515x_device *bq2515x)
+{
+ int ret;
+ 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;
+ return ((vbat_measurement * BQ2515X_UV_FACTOR) / BQ2515X_DIVISOR) * 6;
+}
+
+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 * BQ2515X_UV_FACTOR;
+}
+
+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_UV_FACTOR;
+
+ 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_HOT;
+ 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, };
+
+ 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 = 0;
+
+ if (bq2515x->init_data.ichg)
+ ret = bq2515x_set_ilim_lvl(bq2515x, bq2515x->init_data.ichg);
+
+ if (ret)
+ goto err_out;
+
+ if (bq2515x->init_data.vreg)
+ ret = bq2515x_set_batt_reg(bq2515x, bq2515x->init_data.vreg);
+
+err_out:
+ return ret;
+}
+
+static int bq2515x_read_properties(struct bq2515x_device *bq2515x)
+{
+ int ret;
+
+ ret = device_property_read_u32(bq2515x->dev,
+ "constant-charge-current-max-microamp",
+ &bq2515x->init_data.ichg);
+ if (ret)
+ bq2515x->init_data.ichg = bq2515x_ilim_lvl_values[1];
+
+ ret = device_property_read_u32(bq2515x->dev,
+ "constant-charge-voltage-max-microvolt",
+ &bq2515x->init_data.vreg);
+ if (ret)
+ bq2515x->init_data.vreg = 4200000;
+
+
+ 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 (PTR_ERR(bq2515x->reset_gpio) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ bq2515x->lp_gpio = devm_gpiod_get_optional(bq2515x->dev, "low-power",
+ GPIOD_OUT_LOW);
+ if (PTR_ERR(bq2515x->lp_gpio) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ bq2515x->ce_gpio = devm_gpiod_get_optional(bq2515x->dev,
+ "charge-enable",
+ GPIOD_OUT_HIGH);
+ if (PTR_ERR(bq2515x->ce_gpio) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ 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 %d\n", ret);
+ 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 = 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");
--
2.25.0