diff options
Diffstat (limited to 'drivers/power/supply/axp288_fuel_gauge.c')
| -rw-r--r-- | drivers/power/supply/axp288_fuel_gauge.c | 809 |
1 files changed, 809 insertions, 0 deletions
diff --git a/drivers/power/supply/axp288_fuel_gauge.c b/drivers/power/supply/axp288_fuel_gauge.c new file mode 100644 index 000000000..3be6f3b10 --- /dev/null +++ b/drivers/power/supply/axp288_fuel_gauge.c @@ -0,0 +1,809 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver + * + * Copyright (C) 2020-2021 Andrejus Basovas <xxx@yyy.tld> + * Copyright (C) 2016-2021 Hans de Goede <hdegoede@redhat.com> + * Copyright (C) 2014 Intel Corporation + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#include <linux/acpi.h> +#include <linux/dmi.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/regmap.h> +#include <linux/jiffies.h> +#include <linux/interrupt.h> +#include <linux/mfd/axp20x.h> +#include <linux/platform_device.h> +#include <linux/power_supply.h> +#include <linux/iio/consumer.h> +#include <asm/unaligned.h> +#include <asm/iosf_mbi.h> + +#define PS_STAT_VBUS_TRIGGER (1 << 0) +#define PS_STAT_BAT_CHRG_DIR (1 << 2) +#define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3) +#define PS_STAT_VBUS_VALID (1 << 4) +#define PS_STAT_VBUS_PRESENT (1 << 5) + +#define CHRG_STAT_BAT_SAFE_MODE (1 << 3) +#define CHRG_STAT_BAT_VALID (1 << 4) +#define CHRG_STAT_BAT_PRESENT (1 << 5) +#define CHRG_STAT_CHARGING (1 << 6) +#define CHRG_STAT_PMIC_OTP (1 << 7) + +#define CHRG_CCCV_CC_MASK 0xf /* 4 bits */ +#define CHRG_CCCV_CC_BIT_POS 0 +#define CHRG_CCCV_CC_OFFSET 200 /* 200mA */ +#define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */ +#define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */ +#define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */ +#define CHRG_CCCV_CV_BIT_POS 5 +#define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */ +#define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */ +#define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */ +#define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */ +#define CHRG_CCCV_CHG_EN (1 << 7) + +#define FG_CNTL_OCV_ADJ_STAT (1 << 2) +#define FG_CNTL_OCV_ADJ_EN (1 << 3) +#define FG_CNTL_CAP_ADJ_STAT (1 << 4) +#define FG_CNTL_CAP_ADJ_EN (1 << 5) +#define FG_CNTL_CC_EN (1 << 6) +#define FG_CNTL_GAUGE_EN (1 << 7) + +#define FG_15BIT_WORD_VALID (1 << 15) +#define FG_15BIT_VAL_MASK 0x7fff + +#define FG_REP_CAP_VALID (1 << 7) +#define FG_REP_CAP_VAL_MASK 0x7F + +#define FG_DES_CAP1_VALID (1 << 7) +#define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */ + +#define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */ + +#define FG_OCV_CAP_VALID (1 << 7) +#define FG_OCV_CAP_VAL_MASK 0x7F +#define FG_CC_CAP_VALID (1 << 7) +#define FG_CC_CAP_VAL_MASK 0x7F + +#define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */ +#define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */ +#define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */ +#define FG_LOW_CAP_WARN_THR 14 /* 14 perc */ +#define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */ +#define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */ + +#define DEV_NAME "axp288_fuel_gauge" + +/* 1.1mV per LSB expressed in uV */ +#define VOLTAGE_FROM_ADC(a) ((a * 11) / 10) +/* properties converted to uV, uA */ +#define PROP_VOLT(a) ((a) * 1000) +#define PROP_CURR(a) ((a) * 1000) + +#define AXP288_REG_UPDATE_INTERVAL (60 * HZ) +#define AXP288_FG_INTR_NUM 6 + +#define AXP288_QUIRK_NO_BATTERY BIT(0) + +static bool no_current_sense_res; +module_param(no_current_sense_res, bool, 0444); +MODULE_PARM_DESC(no_current_sense_res, "No (or broken) current sense resistor"); + +enum { + QWBTU_IRQ = 0, + WBTU_IRQ, + QWBTO_IRQ, + WBTO_IRQ, + WL2_IRQ, + WL1_IRQ, +}; + +enum { + BAT_CHRG_CURR, + BAT_D_CURR, + BAT_VOLT, + IIO_CHANNEL_NUM +}; + +struct axp288_fg_info { + struct device *dev; + struct regmap *regmap; + int irq[AXP288_FG_INTR_NUM]; + struct iio_channel *iio_channel[IIO_CHANNEL_NUM]; + struct power_supply *bat; + struct mutex lock; + int status; + int max_volt; + int pwr_op; + int low_cap; + struct dentry *debug_file; + + char valid; /* zero until following fields are valid */ + unsigned long last_updated; /* in jiffies */ + + int pwr_stat; + int fg_res; + int bat_volt; + int d_curr; + int c_curr; + int ocv; + int fg_cc_mtr1; + int fg_des_cap1; +}; + +static enum power_supply_property fuel_gauge_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_VOLTAGE_OCV, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, + POWER_SUPPLY_PROP_TECHNOLOGY, + /* The 3 props below are not used when no_current_sense_res is set */ + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, +}; + +static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg) +{ + unsigned int val; + int ret; + + ret = regmap_read(info->regmap, reg, &val); + if (ret < 0) { + dev_err(info->dev, "Error reading reg 0x%02x err: %d\n", reg, ret); + return ret; + } + + return val; +} + +static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val) +{ + int ret; + + ret = regmap_write(info->regmap, reg, (unsigned int)val); + + if (ret < 0) + dev_err(info->dev, "Error writing reg 0x%02x err: %d\n", reg, ret); + + return ret; +} + +static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg) +{ + unsigned char buf[2]; + int ret; + + ret = regmap_bulk_read(info->regmap, reg, buf, 2); + if (ret < 0) { + dev_err(info->dev, "Error reading reg 0x%02x err: %d\n", reg, ret); + return ret; + } + + ret = get_unaligned_be16(buf); + if (!(ret & FG_15BIT_WORD_VALID)) { + dev_err(info->dev, "Error reg 0x%02x contents not valid\n", reg); + return -ENXIO; + } + + return ret & FG_15BIT_VAL_MASK; +} + +static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg) +{ + unsigned char buf[2]; + int ret; + + ret = regmap_bulk_read(info->regmap, reg, buf, 2); + if (ret < 0) { + dev_err(info->dev, "Error reading reg 0x%02x err: %d\n", reg, ret); + return ret; + } + + /* 12-bit data values have upper 8 bits in buf[0], lower 4 in buf[1] */ + return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f); +} + +static int fuel_gauge_update_registers(struct axp288_fg_info *info) +{ + int ret; + + if (info->valid && time_before(jiffies, info->last_updated + AXP288_REG_UPDATE_INTERVAL)) + return 0; + + dev_dbg(info->dev, "Fuel Gauge updating register values...\n"); + + ret = iosf_mbi_block_punit_i2c_access(); + if (ret < 0) + return ret; + + ret = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS); + if (ret < 0) + goto out; + info->pwr_stat = ret; + + if (no_current_sense_res) + ret = fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG); + else + ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); + if (ret < 0) + goto out; + info->fg_res = ret; + + ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &info->bat_volt); + if (ret < 0) + goto out; + + ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG); + if (ret < 0) + goto out; + info->ocv = ret; + + if (no_current_sense_res) + goto out_no_current_sense_res; + + if (info->pwr_stat & PS_STAT_BAT_CHRG_DIR) { + info->d_curr = 0; + ret = iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], &info->c_curr); + if (ret < 0) + goto out; + } else { + info->c_curr = 0; + ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &info->d_curr); + if (ret < 0) + goto out; + } + + ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG); + if (ret < 0) + goto out; + info->fg_cc_mtr1 = ret; + + ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG); + if (ret < 0) + goto out; + info->fg_des_cap1 = ret; + +out_no_current_sense_res: + info->last_updated = jiffies; + info->valid = 1; + ret = 0; +out: + iosf_mbi_unblock_punit_i2c_access(); + return ret; +} + +static void fuel_gauge_get_status(struct axp288_fg_info *info) +{ + int pwr_stat = info->pwr_stat; + int fg_res = info->fg_res; + int curr = info->d_curr; + + /* Report full if Vbus is valid and the reported capacity is 100% */ + if (!(pwr_stat & PS_STAT_VBUS_VALID)) + goto not_full; + + if (!(fg_res & FG_REP_CAP_VALID)) + goto not_full; + + fg_res &= ~FG_REP_CAP_VALID; + if (fg_res == 100) { + info->status = POWER_SUPPLY_STATUS_FULL; + return; + } + + /* + * Sometimes the charger turns itself off before fg-res reaches 100%. + * When this happens the AXP288 reports a not-charging status and + * 0 mA discharge current. + */ + if (fg_res < 90 || (pwr_stat & PS_STAT_BAT_CHRG_DIR) || no_current_sense_res) + goto not_full; + + if (curr == 0) { + info->status = POWER_SUPPLY_STATUS_FULL; + return; + } + +not_full: + if (pwr_stat & PS_STAT_BAT_CHRG_DIR) + info->status = POWER_SUPPLY_STATUS_CHARGING; + else + info->status = POWER_SUPPLY_STATUS_DISCHARGING; +} + +static int fuel_gauge_battery_health(struct axp288_fg_info *info) +{ + int vocv = VOLTAGE_FROM_ADC(info->ocv); + int health = POWER_SUPPLY_HEALTH_UNKNOWN; + + if (vocv > info->max_volt) + health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + else + health = POWER_SUPPLY_HEALTH_GOOD; + + return health; +} + +static int fuel_gauge_get_property(struct power_supply *ps, + enum power_supply_property prop, + union power_supply_propval *val) +{ + struct axp288_fg_info *info = power_supply_get_drvdata(ps); + int ret, value; + + mutex_lock(&info->lock); + + ret = fuel_gauge_update_registers(info); + if (ret < 0) + goto out; + + switch (prop) { + case POWER_SUPPLY_PROP_STATUS: + fuel_gauge_get_status(info); + val->intval = info->status; + break; + case POWER_SUPPLY_PROP_HEALTH: + val->intval = fuel_gauge_battery_health(info); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + value = VOLTAGE_FROM_ADC(info->bat_volt); + val->intval = PROP_VOLT(value); + break; + case POWER_SUPPLY_PROP_VOLTAGE_OCV: + value = VOLTAGE_FROM_ADC(info->ocv); + val->intval = PROP_VOLT(value); + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + if (info->d_curr > 0) + value = -1 * info->d_curr; + else + value = info->c_curr; + + val->intval = PROP_CURR(value); + break; + case POWER_SUPPLY_PROP_PRESENT: + if (info->pwr_op & CHRG_STAT_BAT_PRESENT) + val->intval = 1; + else + val->intval = 0; + break; + case POWER_SUPPLY_PROP_CAPACITY: + if (!(info->fg_res & FG_REP_CAP_VALID)) + dev_err(info->dev, "capacity measurement not valid\n"); + val->intval = (info->fg_res & FG_REP_CAP_VAL_MASK); + break; + case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: + val->intval = (info->low_cap & 0x0f); + break; + case POWER_SUPPLY_PROP_TECHNOLOGY: + val->intval = POWER_SUPPLY_TECHNOLOGY_LION; + break; + case POWER_SUPPLY_PROP_CHARGE_NOW: + val->intval = info->fg_cc_mtr1 * FG_DES_CAP_RES_LSB; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL: + val->intval = info->fg_des_cap1 * FG_DES_CAP_RES_LSB; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: + val->intval = PROP_VOLT(info->max_volt); + break; + default: + ret = -EINVAL; + } + +out: + mutex_unlock(&info->lock); + return ret; +} + +static int fuel_gauge_set_property(struct power_supply *ps, + enum power_supply_property prop, + const union power_supply_propval *val) +{ + struct axp288_fg_info *info = power_supply_get_drvdata(ps); + int new_low_cap, ret = 0; + + mutex_lock(&info->lock); + switch (prop) { + case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: + if ((val->intval < 0) || (val->intval > 15)) { + ret = -EINVAL; + break; + } + new_low_cap = info->low_cap; + new_low_cap &= 0xf0; + new_low_cap |= (val->intval & 0xf); + ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, new_low_cap); + if (ret == 0) + info->low_cap = new_low_cap; + break; + default: + ret = -EINVAL; + break; + } + + mutex_unlock(&info->lock); + return ret; +} + +static int fuel_gauge_property_is_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + int ret; + + switch (psp) { + case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: + ret = 1; + break; + default: + ret = 0; + } + + return ret; +} + +static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev) +{ + struct axp288_fg_info *info = dev; + int i; + + for (i = 0; i < AXP288_FG_INTR_NUM; i++) { + if (info->irq[i] == irq) + break; + } + + if (i >= AXP288_FG_INTR_NUM) { + dev_warn(info->dev, "spurious interrupt!!\n"); + return IRQ_NONE; + } + + switch (i) { + case QWBTU_IRQ: + dev_info(info->dev, "Quit Battery under temperature in work mode IRQ (QWBTU)\n"); + break; + case WBTU_IRQ: + dev_info(info->dev, "Battery under temperature in work mode IRQ (WBTU)\n"); + break; + case QWBTO_IRQ: + dev_info(info->dev, "Quit Battery over temperature in work mode IRQ (QWBTO)\n"); + break; + case WBTO_IRQ: + dev_info(info->dev, "Battery over temperature in work mode IRQ (WBTO)\n"); + break; + case WL2_IRQ: + dev_info(info->dev, "Low Batt Warning(2) INTR\n"); + break; + case WL1_IRQ: + dev_info(info->dev, "Low Batt Warning(1) INTR\n"); + break; + default: + dev_warn(info->dev, "Spurious Interrupt!!!\n"); + } + + mutex_lock(&info->lock); + info->valid = 0; /* Force updating of the cached registers */ + mutex_unlock(&info->lock); + + power_supply_changed(info->bat); + return IRQ_HANDLED; +} + +static void fuel_gauge_external_power_changed(struct power_supply *psy) +{ + struct axp288_fg_info *info = power_supply_get_drvdata(psy); + + mutex_lock(&info->lock); + info->valid = 0; /* Force updating of the cached registers */ + mutex_unlock(&info->lock); + power_supply_changed(psy); +} + +static struct power_supply_desc fuel_gauge_desc = { + .name = DEV_NAME, + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = fuel_gauge_props, + .num_properties = ARRAY_SIZE(fuel_gauge_props), + .get_property = fuel_gauge_get_property, + .set_property = fuel_gauge_set_property, + .property_is_writeable = fuel_gauge_property_is_writeable, + .external_power_changed = fuel_gauge_external_power_changed, +}; + +/* + * Some devices have no battery (HDMI sticks) and the axp288 battery's + * detection reports one despite it not being there. + * Please keep this listed sorted alphabetically. + */ +static const struct dmi_system_id axp288_quirks[] = { + { + /* ACEPC T8 Cherry Trail Z8350 mini PC */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"), + DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T8"), + /* also match on somewhat unique bios-version */ + DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000"), + }, + .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, + }, + { + /* ACEPC T11 Cherry Trail Z8350 mini PC */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"), + DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T11"), + /* also match on somewhat unique bios-version */ + DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000"), + }, + .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, + }, + { + /* Intel Cherry Trail Compute Stick, Windows version */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Intel"), + DMI_MATCH(DMI_PRODUCT_NAME, "STK1AW32SC"), + }, + .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, + }, + { + /* Intel Cherry Trail Compute Stick, version without an OS */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Intel"), + DMI_MATCH(DMI_PRODUCT_NAME, "STK1A32SC"), + }, + .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, + }, + { + /* Meegopad T02 */ + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "MEEGOPAD T02"), + }, + .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, + }, + { /* Mele PCG03 Mini PC */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "Mini PC"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "Mini PC"), + }, + .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, + }, + { + /* Minix Neo Z83-4 mini PC */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MINIX"), + DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"), + }, + .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, + }, + { + /* + * One Mix 1, this uses the "T3 MRD" boardname used by + * generic mini PCs, but it is a mini laptop so it does + * actually have a battery! + */ + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "T3 MRD"), + DMI_MATCH(DMI_BIOS_DATE, "06/14/2018"), + }, + .driver_data = NULL, + }, + { + /* + * Various Ace PC/Meegopad/MinisForum/Wintel Mini-PCs/HDMI-sticks + * This entry must be last because it is generic, this allows + * adding more specifuc quirks overriding this generic entry. + */ + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "T3 MRD"), + DMI_MATCH(DMI_CHASSIS_TYPE, "3"), + DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), + }, + .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, + }, + {} +}; + +static int axp288_fuel_gauge_read_initial_regs(struct axp288_fg_info *info) +{ + unsigned int val; + int ret; + + /* + * On some devices the fuelgauge and charger parts of the axp288 are + * not used, check that the fuelgauge is enabled (CC_CTRL != 0). + */ + ret = regmap_read(info->regmap, AXP20X_CC_CTRL, &val); + if (ret < 0) + return ret; + if (val == 0) + return -ENODEV; + + ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); + if (ret < 0) + return ret; + + if (!(ret & FG_DES_CAP1_VALID)) { + dev_err(info->dev, "axp288 not configured by firmware\n"); + return -ENODEV; + } + + ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1); + if (ret < 0) + return ret; + switch ((ret & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS) { + case CHRG_CCCV_CV_4100MV: + info->max_volt = 4100; + break; + case CHRG_CCCV_CV_4150MV: + info->max_volt = 4150; + break; + case CHRG_CCCV_CV_4200MV: + info->max_volt = 4200; + break; + case CHRG_CCCV_CV_4350MV: + info->max_volt = 4350; + break; + } + + ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE); + if (ret < 0) + return ret; + info->pwr_op = ret; + + ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); + if (ret < 0) + return ret; + info->low_cap = ret; + + return 0; +} + +static void axp288_fuel_gauge_release_iio_chans(void *data) +{ + struct axp288_fg_info *info = data; + int i; + + for (i = 0; i < IIO_CHANNEL_NUM; i++) + if (!IS_ERR_OR_NULL(info->iio_channel[i])) + iio_channel_release(info->iio_channel[i]); +} + +static int axp288_fuel_gauge_probe(struct platform_device *pdev) +{ + struct axp288_fg_info *info; + struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); + struct power_supply_config psy_cfg = {}; + static const char * const iio_chan_name[] = { + [BAT_CHRG_CURR] = "axp288-chrg-curr", + [BAT_D_CURR] = "axp288-chrg-d-curr", + [BAT_VOLT] = "axp288-batt-volt", + }; + const struct dmi_system_id *dmi_id; + struct device *dev = &pdev->dev; + unsigned long quirks = 0; + int i, pirq, ret; + + /* + * Normally the native AXP288 fg/charger drivers are preferred but + * on some devices the ACPI drivers should be used instead. + */ + if (!acpi_quirk_skip_acpi_ac_and_battery()) + return -ENODEV; + + dmi_id = dmi_first_match(axp288_quirks); + if (dmi_id) + quirks = (unsigned long)dmi_id->driver_data; + + if (quirks & AXP288_QUIRK_NO_BATTERY) + return -ENODEV; + + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = dev; + info->regmap = axp20x->regmap; + info->status = POWER_SUPPLY_STATUS_UNKNOWN; + info->valid = 0; + + platform_set_drvdata(pdev, info); + + mutex_init(&info->lock); + + for (i = 0; i < AXP288_FG_INTR_NUM; i++) { + pirq = platform_get_irq(pdev, i); + if (pirq < 0) + continue; + ret = regmap_irq_get_virq(axp20x->regmap_irqc, pirq); + if (ret < 0) + return dev_err_probe(dev, ret, "getting vIRQ %d\n", pirq); + + info->irq[i] = ret; + } + + for (i = 0; i < IIO_CHANNEL_NUM; i++) { + /* + * Note cannot use devm_iio_channel_get because x86 systems + * lack the device<->channel maps which iio_channel_get will + * try to use when passed a non NULL device pointer. + */ + info->iio_channel[i] = + iio_channel_get(NULL, iio_chan_name[i]); + if (IS_ERR(info->iio_channel[i])) { + ret = PTR_ERR(info->iio_channel[i]); + dev_dbg(dev, "error getting iiochan %s: %d\n", iio_chan_name[i], ret); + /* Wait for axp288_adc to load */ + if (ret == -ENODEV) + ret = -EPROBE_DEFER; + + axp288_fuel_gauge_release_iio_chans(info); + return ret; + } + } + + ret = devm_add_action_or_reset(dev, axp288_fuel_gauge_release_iio_chans, info); + if (ret) + return ret; + + ret = iosf_mbi_block_punit_i2c_access(); + if (ret < 0) + return ret; + + ret = axp288_fuel_gauge_read_initial_regs(info); + iosf_mbi_unblock_punit_i2c_access(); + if (ret < 0) + return ret; + + psy_cfg.drv_data = info; + if (no_current_sense_res) + fuel_gauge_desc.num_properties = ARRAY_SIZE(fuel_gauge_props) - 3; + info->bat = devm_power_supply_register(dev, &fuel_gauge_desc, &psy_cfg); + if (IS_ERR(info->bat)) { + ret = PTR_ERR(info->bat); + dev_err(dev, "failed to register battery: %d\n", ret); + return ret; + } + + for (i = 0; i < AXP288_FG_INTR_NUM; i++) { + ret = devm_request_threaded_irq(dev, info->irq[i], NULL, + fuel_gauge_thread_handler, + IRQF_ONESHOT, DEV_NAME, info); + if (ret) + return dev_err_probe(dev, ret, "requesting IRQ %d\n", info->irq[i]); + } + + return 0; +} + +static const struct platform_device_id axp288_fg_id_table[] = { + { .name = DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(platform, axp288_fg_id_table); + +static struct platform_driver axp288_fuel_gauge_driver = { + .probe = axp288_fuel_gauge_probe, + .id_table = axp288_fg_id_table, + .driver = { + .name = DEV_NAME, + }, +}; + +module_platform_driver(axp288_fuel_gauge_driver); + +MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>"); +MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>"); +MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver"); +MODULE_LICENSE("GPL"); |