| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver |
| * |
| * Copyright (C) 2016-2017 Hans de Goede <hdegoede@redhat.com> |
| * Copyright (C) 2014 Intel Corporation |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| */ |
| |
| #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 <linux/debugfs.h> |
| #include <linux/seq_file.h> |
| #include <asm/unaligned.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 NR_RETRY_CNT 3 |
| #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_FG_INTR_NUM 6 |
| enum { |
| QWBTU_IRQ = 0, |
| WBTU_IRQ, |
| QWBTO_IRQ, |
| WBTO_IRQ, |
| WL2_IRQ, |
| WL1_IRQ, |
| }; |
| |
| enum { |
| BAT_TEMP = 0, |
| PMIC_TEMP, |
| SYSTEM_TEMP, |
| BAT_CHRG_CURR, |
| BAT_D_CURR, |
| BAT_VOLT, |
| IIO_CHANNEL_NUM |
| }; |
| |
| struct axp288_fg_info { |
| struct platform_device *pdev; |
| struct regmap *regmap; |
| struct regmap_irq_chip_data *regmap_irqc; |
| 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; |
| struct dentry *debug_file; |
| }; |
| |
| 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_CURRENT_NOW, |
| POWER_SUPPLY_PROP_CAPACITY, |
| POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| POWER_SUPPLY_PROP_CHARGE_FULL, |
| POWER_SUPPLY_PROP_CHARGE_NOW, |
| }; |
| |
| static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg) |
| { |
| int ret, i; |
| unsigned int val; |
| |
| for (i = 0; i < NR_RETRY_CNT; i++) { |
| ret = regmap_read(info->regmap, reg, &val); |
| if (ret == -EBUSY) |
| continue; |
| else |
| break; |
| } |
| |
| if (ret < 0) { |
| dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", 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->pdev->dev, "axp288 reg write err:%d\n", 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->pdev->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->pdev->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->pdev->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); |
| } |
| |
| #ifdef CONFIG_DEBUG_FS |
| static int fuel_gauge_debug_show(struct seq_file *s, void *data) |
| { |
| struct axp288_fg_info *info = s->private; |
| int raw_val, ret; |
| |
| seq_printf(s, " PWR_STATUS[%02x] : %02x\n", |
| AXP20X_PWR_INPUT_STATUS, |
| fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS)); |
| seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n", |
| AXP20X_PWR_OP_MODE, |
| fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE)); |
| seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n", |
| AXP20X_CHRG_CTRL1, |
| fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1)); |
| seq_printf(s, " VLTF[%02x] : %02x\n", |
| AXP20X_V_LTF_DISCHRG, |
| fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG)); |
| seq_printf(s, " VHTF[%02x] : %02x\n", |
| AXP20X_V_HTF_DISCHRG, |
| fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG)); |
| seq_printf(s, " CC_CTRL[%02x] : %02x\n", |
| AXP20X_CC_CTRL, |
| fuel_gauge_reg_readb(info, AXP20X_CC_CTRL)); |
| seq_printf(s, "BATTERY CAP[%02x] : %02x\n", |
| AXP20X_FG_RES, |
| fuel_gauge_reg_readb(info, AXP20X_FG_RES)); |
| seq_printf(s, " FG_RDC1[%02x] : %02x\n", |
| AXP288_FG_RDC1_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG)); |
| seq_printf(s, " FG_RDC0[%02x] : %02x\n", |
| AXP288_FG_RDC0_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG)); |
| seq_printf(s, " FG_OCV[%02x] : %04x\n", |
| AXP288_FG_OCVH_REG, |
| fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG)); |
| seq_printf(s, " FG_DES_CAP[%02x] : %04x\n", |
| AXP288_FG_DES_CAP1_REG, |
| fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG)); |
| seq_printf(s, " FG_CC_MTR[%02x] : %04x\n", |
| AXP288_FG_CC_MTR1_REG, |
| fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG)); |
| seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n", |
| AXP288_FG_OCV_CAP_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG)); |
| seq_printf(s, " FG_CC_CAP[%02x] : %02x\n", |
| AXP288_FG_CC_CAP_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG)); |
| seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n", |
| AXP288_FG_LOW_CAP_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG)); |
| seq_printf(s, "TUNING_CTL0[%02x] : %02x\n", |
| AXP288_FG_TUNE0, |
| fuel_gauge_reg_readb(info, AXP288_FG_TUNE0)); |
| seq_printf(s, "TUNING_CTL1[%02x] : %02x\n", |
| AXP288_FG_TUNE1, |
| fuel_gauge_reg_readb(info, AXP288_FG_TUNE1)); |
| seq_printf(s, "TUNING_CTL2[%02x] : %02x\n", |
| AXP288_FG_TUNE2, |
| fuel_gauge_reg_readb(info, AXP288_FG_TUNE2)); |
| seq_printf(s, "TUNING_CTL3[%02x] : %02x\n", |
| AXP288_FG_TUNE3, |
| fuel_gauge_reg_readb(info, AXP288_FG_TUNE3)); |
| seq_printf(s, "TUNING_CTL4[%02x] : %02x\n", |
| AXP288_FG_TUNE4, |
| fuel_gauge_reg_readb(info, AXP288_FG_TUNE4)); |
| seq_printf(s, "TUNING_CTL5[%02x] : %02x\n", |
| AXP288_FG_TUNE5, |
| fuel_gauge_reg_readb(info, AXP288_FG_TUNE5)); |
| |
| ret = iio_read_channel_raw(info->iio_channel[BAT_TEMP], &raw_val); |
| if (ret >= 0) |
| seq_printf(s, "axp288-batttemp : %d\n", raw_val); |
| ret = iio_read_channel_raw(info->iio_channel[PMIC_TEMP], &raw_val); |
| if (ret >= 0) |
| seq_printf(s, "axp288-pmictemp : %d\n", raw_val); |
| ret = iio_read_channel_raw(info->iio_channel[SYSTEM_TEMP], &raw_val); |
| if (ret >= 0) |
| seq_printf(s, "axp288-systtemp : %d\n", raw_val); |
| ret = iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], &raw_val); |
| if (ret >= 0) |
| seq_printf(s, "axp288-chrgcurr : %d\n", raw_val); |
| ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &raw_val); |
| if (ret >= 0) |
| seq_printf(s, "axp288-dchrgcur : %d\n", raw_val); |
| ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &raw_val); |
| if (ret >= 0) |
| seq_printf(s, "axp288-battvolt : %d\n", raw_val); |
| |
| return 0; |
| } |
| |
| DEFINE_SHOW_ATTRIBUTE(fuel_gauge_debug); |
| |
| static void fuel_gauge_create_debugfs(struct axp288_fg_info *info) |
| { |
| info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL, |
| info, &fuel_gauge_debug_fops); |
| } |
| |
| static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info) |
| { |
| debugfs_remove(info->debug_file); |
| } |
| #else |
| static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info) |
| { |
| } |
| static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info) |
| { |
| } |
| #endif |
| |
| static void fuel_gauge_get_status(struct axp288_fg_info *info) |
| { |
| int pwr_stat, fg_res, curr, ret; |
| |
| pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS); |
| if (pwr_stat < 0) { |
| dev_err(&info->pdev->dev, |
| "PWR STAT read failed:%d\n", pwr_stat); |
| return; |
| } |
| |
| /* Report full if Vbus is valid and the reported capacity is 100% */ |
| if (!(pwr_stat & PS_STAT_VBUS_VALID)) |
| goto not_full; |
| |
| fg_res = fuel_gauge_reg_readb(info, AXP20X_FG_RES); |
| if (fg_res < 0) { |
| dev_err(&info->pdev->dev, "FG RES read failed: %d\n", fg_res); |
| return; |
| } |
| 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)) |
| goto not_full; |
| |
| ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &curr); |
| if (ret < 0) { |
| dev_err(&info->pdev->dev, "FG get current failed: %d\n", ret); |
| return; |
| } |
| 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_get_vbatt(struct axp288_fg_info *info, int *vbatt) |
| { |
| int ret = 0, raw_val; |
| |
| ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &raw_val); |
| if (ret < 0) |
| goto vbatt_read_fail; |
| |
| *vbatt = VOLTAGE_FROM_ADC(raw_val); |
| vbatt_read_fail: |
| return ret; |
| } |
| |
| static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur) |
| { |
| int ret, discharge; |
| |
| /* First check discharge current, so that we do only 1 read on bat. */ |
| ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &discharge); |
| if (ret < 0) |
| return ret; |
| |
| if (discharge > 0) { |
| *cur = -1 * discharge; |
| return 0; |
| } |
| |
| return iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], cur); |
| } |
| |
| static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv) |
| { |
| int ret; |
| |
| ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG); |
| if (ret >= 0) |
| *vocv = VOLTAGE_FROM_ADC(ret); |
| |
| return ret; |
| } |
| |
| static int fuel_gauge_battery_health(struct axp288_fg_info *info) |
| { |
| int ret, vocv, health = POWER_SUPPLY_HEALTH_UNKNOWN; |
| |
| ret = fuel_gauge_get_vocv(info, &vocv); |
| if (ret < 0) |
| goto health_read_fail; |
| |
| if (vocv > info->max_volt) |
| health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
| else |
| health = POWER_SUPPLY_HEALTH_GOOD; |
| |
| health_read_fail: |
| 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 = 0, value; |
| |
| mutex_lock(&info->lock); |
| 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: |
| ret = fuel_gauge_get_vbatt(info, &value); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| val->intval = PROP_VOLT(value); |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_OCV: |
| ret = fuel_gauge_get_vocv(info, &value); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| val->intval = PROP_VOLT(value); |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_NOW: |
| ret = fuel_gauge_get_current(info, &value); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| val->intval = PROP_CURR(value); |
| break; |
| case POWER_SUPPLY_PROP_PRESENT: |
| ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| |
| if (ret & CHRG_STAT_BAT_PRESENT) |
| val->intval = 1; |
| else |
| val->intval = 0; |
| break; |
| case POWER_SUPPLY_PROP_CAPACITY: |
| ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| |
| if (!(ret & FG_REP_CAP_VALID)) |
| dev_err(&info->pdev->dev, |
| "capacity measurement not valid\n"); |
| val->intval = (ret & FG_REP_CAP_VAL_MASK); |
| break; |
| case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| val->intval = (ret & 0x0f); |
| break; |
| case POWER_SUPPLY_PROP_TECHNOLOGY: |
| val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_NOW: |
| ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| |
| val->intval = ret * FG_DES_CAP_RES_LSB; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_FULL: |
| ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| |
| val->intval = ret * FG_DES_CAP_RES_LSB; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
| val->intval = PROP_VOLT(info->max_volt); |
| break; |
| default: |
| mutex_unlock(&info->lock); |
| return -EINVAL; |
| } |
| |
| mutex_unlock(&info->lock); |
| return 0; |
| |
| fuel_gauge_read_err: |
| 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 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; |
| } |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); |
| if (ret < 0) |
| break; |
| ret &= 0xf0; |
| ret |= (val->intval & 0xf); |
| ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret); |
| 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->pdev->dev, "spurious interrupt!!\n"); |
| return IRQ_NONE; |
| } |
| |
| switch (i) { |
| case QWBTU_IRQ: |
| dev_info(&info->pdev->dev, |
| "Quit Battery under temperature in work mode IRQ (QWBTU)\n"); |
| break; |
| case WBTU_IRQ: |
| dev_info(&info->pdev->dev, |
| "Battery under temperature in work mode IRQ (WBTU)\n"); |
| break; |
| case QWBTO_IRQ: |
| dev_info(&info->pdev->dev, |
| "Quit Battery over temperature in work mode IRQ (QWBTO)\n"); |
| break; |
| case WBTO_IRQ: |
| dev_info(&info->pdev->dev, |
| "Battery over temperature in work mode IRQ (WBTO)\n"); |
| break; |
| case WL2_IRQ: |
| dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n"); |
| break; |
| case WL1_IRQ: |
| dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n"); |
| break; |
| default: |
| dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n"); |
| } |
| |
| 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); |
| |
| power_supply_changed(info->bat); |
| } |
| |
| static const 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, |
| }; |
| |
| static void fuel_gauge_init_irq(struct axp288_fg_info *info) |
| { |
| int ret, i, pirq; |
| |
| for (i = 0; i < AXP288_FG_INTR_NUM; i++) { |
| pirq = platform_get_irq(info->pdev, i); |
| info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq); |
| if (info->irq[i] < 0) { |
| dev_warn(&info->pdev->dev, |
| "regmap_irq get virq failed for IRQ %d: %d\n", |
| pirq, info->irq[i]); |
| info->irq[i] = -1; |
| goto intr_failed; |
| } |
| ret = request_threaded_irq(info->irq[i], |
| NULL, fuel_gauge_thread_handler, |
| IRQF_ONESHOT, DEV_NAME, info); |
| if (ret) { |
| dev_warn(&info->pdev->dev, |
| "request irq failed for IRQ %d: %d\n", |
| pirq, info->irq[i]); |
| info->irq[i] = -1; |
| goto intr_failed; |
| } else { |
| dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n", |
| pirq, info->irq[i]); |
| } |
| } |
| return; |
| |
| intr_failed: |
| for (; i > 0; i--) { |
| free_irq(info->irq[i - 1], info); |
| info->irq[i - 1] = -1; |
| } |
| } |
| |
| /* |
| * Some devices have no battery (HDMI sticks) and the axp288 battery's |
| * detection reports one despite it not being there. |
| */ |
| static const struct dmi_system_id axp288_fuel_gauge_blacklist[] = { |
| { |
| /* 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"), |
| }, |
| }, |
| { |
| /* 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"), |
| }, |
| }, |
| { |
| /* Intel Cherry Trail Compute Stick, Windows version */ |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "STK1AW32SC"), |
| }, |
| }, |
| { |
| /* Intel Cherry Trail Compute Stick, version without an OS */ |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "STK1A32SC"), |
| }, |
| }, |
| { |
| /* Meegopad T08 */ |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Default string"), |
| DMI_MATCH(DMI_BOARD_VENDOR, "To be filled by OEM."), |
| DMI_MATCH(DMI_BOARD_NAME, "T3 MRD"), |
| DMI_MATCH(DMI_BOARD_VERSION, "V1.1"), |
| }, |
| }, |
| { |
| /* ECS EF20EA */ |
| .matches = { |
| DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"), |
| }, |
| }, |
| {} |
| }; |
| |
| static int axp288_fuel_gauge_probe(struct platform_device *pdev) |
| { |
| int i, ret = 0; |
| 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_TEMP] = "axp288-batt-temp", |
| [PMIC_TEMP] = "axp288-pmic-temp", |
| [SYSTEM_TEMP] = "axp288-system-temp", |
| [BAT_CHRG_CURR] = "axp288-chrg-curr", |
| [BAT_D_CURR] = "axp288-chrg-d-curr", |
| [BAT_VOLT] = "axp288-batt-volt", |
| }; |
| unsigned int val; |
| |
| if (dmi_check_system(axp288_fuel_gauge_blacklist)) |
| return -ENODEV; |
| |
| /* |
| * 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(axp20x->regmap, AXP20X_CC_CTRL, &val); |
| if (ret < 0) |
| return ret; |
| if (val == 0) |
| return -ENODEV; |
| |
| info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| |
| info->pdev = pdev; |
| info->regmap = axp20x->regmap; |
| info->regmap_irqc = axp20x->regmap_irqc; |
| info->status = POWER_SUPPLY_STATUS_UNKNOWN; |
| |
| platform_set_drvdata(pdev, info); |
| |
| mutex_init(&info->lock); |
| |
| 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(&pdev->dev, "error getting iiochan %s: %d\n", |
| iio_chan_name[i], ret); |
| /* Wait for axp288_adc to load */ |
| if (ret == -ENODEV) |
| ret = -EPROBE_DEFER; |
| |
| goto out_free_iio_chan; |
| } |
| } |
| |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); |
| if (ret < 0) |
| goto out_free_iio_chan; |
| |
| if (!(ret & FG_DES_CAP1_VALID)) { |
| dev_err(&pdev->dev, "axp288 not configured by firmware\n"); |
| ret = -ENODEV; |
| goto out_free_iio_chan; |
| } |
| |
| ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1); |
| if (ret < 0) |
| goto out_free_iio_chan; |
| 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; |
| } |
| |
| psy_cfg.drv_data = info; |
| info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg); |
| if (IS_ERR(info->bat)) { |
| ret = PTR_ERR(info->bat); |
| dev_err(&pdev->dev, "failed to register battery: %d\n", ret); |
| goto out_free_iio_chan; |
| } |
| |
| fuel_gauge_create_debugfs(info); |
| fuel_gauge_init_irq(info); |
| |
| return 0; |
| |
| out_free_iio_chan: |
| for (i = 0; i < IIO_CHANNEL_NUM; i++) |
| if (!IS_ERR_OR_NULL(info->iio_channel[i])) |
| iio_channel_release(info->iio_channel[i]); |
| |
| return ret; |
| } |
| |
| static const struct platform_device_id axp288_fg_id_table[] = { |
| { .name = DEV_NAME }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(platform, axp288_fg_id_table); |
| |
| static int axp288_fuel_gauge_remove(struct platform_device *pdev) |
| { |
| struct axp288_fg_info *info = platform_get_drvdata(pdev); |
| int i; |
| |
| power_supply_unregister(info->bat); |
| fuel_gauge_remove_debugfs(info); |
| |
| for (i = 0; i < AXP288_FG_INTR_NUM; i++) |
| if (info->irq[i] >= 0) |
| free_irq(info->irq[i], info); |
| |
| for (i = 0; i < IIO_CHANNEL_NUM; i++) |
| iio_channel_release(info->iio_channel[i]); |
| |
| return 0; |
| } |
| |
| static struct platform_driver axp288_fuel_gauge_driver = { |
| .probe = axp288_fuel_gauge_probe, |
| .remove = axp288_fuel_gauge_remove, |
| .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"); |