| /* |
| * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver |
| * |
| * Copyright (C) 2014 Intel Corporation |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| */ |
| |
| #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/device.h> |
| #include <linux/workqueue.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> |
| |
| #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 CV_4100 4100 /* 4100mV */ |
| #define CV_4150 4150 /* 4150mV */ |
| #define CV_4200 4200 /* 4200mV */ |
| #define CV_4350 4350 /* 4350mV */ |
| |
| #define TEMP_IRQ_CFG_QWBTU (1 << 0) |
| #define TEMP_IRQ_CFG_WBTU (1 << 1) |
| #define TEMP_IRQ_CFG_QWBTO (1 << 2) |
| #define TEMP_IRQ_CFG_WBTO (1 << 3) |
| #define TEMP_IRQ_CFG_MASK 0xf |
| |
| #define FG_IRQ_CFG_LOWBATT_WL2 (1 << 0) |
| #define FG_IRQ_CFG_LOWBATT_WL1 (1 << 1) |
| #define FG_IRQ_CFG_LOWBATT_MASK 0x3 |
| #define LOWBAT_IRQ_STAT_LOWBATT_WL2 (1 << 0) |
| #define LOWBAT_IRQ_STAT_LOWBATT_WL1 (1 << 1) |
| |
| #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_REP_CAP_VALID (1 << 7) |
| #define FG_REP_CAP_VAL_MASK 0x7F |
| |
| #define FG_DES_CAP1_VALID (1 << 7) |
| #define FG_DES_CAP1_VAL_MASK 0x7F |
| #define FG_DES_CAP0_VAL_MASK 0xFF |
| #define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */ |
| |
| #define FG_CC_MTR1_VALID (1 << 7) |
| #define FG_CC_MTR1_VAL_MASK 0x7F |
| #define FG_CC_MTR0_VAL_MASK 0xFF |
| #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 STATUS_MON_DELAY_JIFFIES (HZ * 60) /*60 sec */ |
| #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 tenths of degrees, uV, uA, uW */ |
| #define PROP_TEMP(a) ((a) * 10) |
| #define UNPROP_TEMP(a) ((a) / 10) |
| #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, |
| }; |
| |
| struct axp288_fg_info { |
| struct platform_device *pdev; |
| struct axp20x_fg_pdata *pdata; |
| struct regmap *regmap; |
| struct regmap_irq_chip_data *regmap_irqc; |
| int irq[AXP288_FG_INTR_NUM]; |
| struct power_supply bat; |
| struct mutex lock; |
| int status; |
| struct delayed_work status_monitor; |
| 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_MIN_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_TEMP, |
| POWER_SUPPLY_PROP_TEMP_MAX, |
| POWER_SUPPLY_PROP_TEMP_MIN, |
| POWER_SUPPLY_PROP_TEMP_ALERT_MIN, |
| POWER_SUPPLY_PROP_TEMP_ALERT_MAX, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| POWER_SUPPLY_PROP_CHARGE_FULL, |
| POWER_SUPPLY_PROP_CHARGE_NOW, |
| POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
| POWER_SUPPLY_PROP_MODEL_NAME, |
| }; |
| |
| 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 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 pmic_read_adc_val(const char *name, int *raw_val, |
| struct axp288_fg_info *info) |
| { |
| int ret, val = 0; |
| struct iio_channel *indio_chan; |
| |
| indio_chan = iio_channel_get(NULL, name); |
| if (IS_ERR_OR_NULL(indio_chan)) { |
| ret = PTR_ERR(indio_chan); |
| goto exit; |
| } |
| ret = iio_read_channel_raw(indio_chan, &val); |
| if (ret < 0) { |
| dev_err(&info->pdev->dev, |
| "IIO channel read error: %x, %x\n", ret, val); |
| goto err_exit; |
| } |
| |
| dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val); |
| *raw_val = val; |
| |
| err_exit: |
| iio_channel_release(indio_chan); |
| exit: |
| return ret; |
| } |
| |
| #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_OCVH[%02x] : %02x\n", |
| AXP288_FG_OCVH_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG)); |
| seq_printf(s, " FG_OCVL[%02x] : %02x\n", |
| AXP288_FG_OCVL_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG)); |
| seq_printf(s, "FG_DES_CAP1[%02x] : %02x\n", |
| AXP288_FG_DES_CAP1_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG)); |
| seq_printf(s, "FG_DES_CAP0[%02x] : %02x\n", |
| AXP288_FG_DES_CAP0_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG)); |
| seq_printf(s, " FG_CC_MTR1[%02x] : %02x\n", |
| AXP288_FG_CC_MTR1_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG)); |
| seq_printf(s, " FG_CC_MTR0[%02x] : %02x\n", |
| AXP288_FG_CC_MTR0_REG, |
| fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_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 = pmic_read_adc_val("axp288-batt-temp", &raw_val, info); |
| if (ret >= 0) |
| seq_printf(s, "axp288-batttemp : %d\n", raw_val); |
| ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info); |
| if (ret >= 0) |
| seq_printf(s, "axp288-pmictemp : %d\n", raw_val); |
| ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info); |
| if (ret >= 0) |
| seq_printf(s, "axp288-systtemp : %d\n", raw_val); |
| ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info); |
| if (ret >= 0) |
| seq_printf(s, "axp288-chrgcurr : %d\n", raw_val); |
| ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info); |
| if (ret >= 0) |
| seq_printf(s, "axp288-dchrgcur : %d\n", raw_val); |
| ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info); |
| if (ret >= 0) |
| seq_printf(s, "axp288-battvolt : %d\n", raw_val); |
| |
| return 0; |
| } |
| |
| static int debug_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, fuel_gauge_debug_show, inode->i_private); |
| } |
| |
| static const struct file_operations fg_debug_fops = { |
| .open = debug_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static void fuel_gauge_create_debugfs(struct axp288_fg_info *info) |
| { |
| info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL, |
| info, &fg_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, ret; |
| int charge, discharge; |
| |
| 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; |
| } |
| ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info); |
| if (ret < 0) { |
| dev_err(&info->pdev->dev, |
| "ADC charge current read failed:%d\n", ret); |
| return; |
| } |
| ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info); |
| if (ret < 0) { |
| dev_err(&info->pdev->dev, |
| "ADC discharge current read failed:%d\n", ret); |
| return; |
| } |
| |
| if (charge > 0) |
| info->status = POWER_SUPPLY_STATUS_CHARGING; |
| else if (discharge > 0) |
| info->status = POWER_SUPPLY_STATUS_DISCHARGING; |
| else { |
| if (pwr_stat & CHRG_STAT_BAT_PRESENT) |
| info->status = POWER_SUPPLY_STATUS_FULL; |
| else |
| info->status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| } |
| } |
| |
| static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt) |
| { |
| int ret = 0, raw_val; |
| |
| ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info); |
| 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, value = 0; |
| int charge, discharge; |
| |
| ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info); |
| if (ret < 0) |
| goto current_read_fail; |
| ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info); |
| if (ret < 0) |
| goto current_read_fail; |
| |
| if (charge > 0) |
| value = charge; |
| else if (discharge > 0) |
| value = -1 * discharge; |
| |
| *cur = value; |
| current_read_fail: |
| return ret; |
| } |
| |
| static int temp_to_adc(struct axp288_fg_info *info, int tval) |
| { |
| int rntc = 0, i, ret, adc_val; |
| int rmin, rmax, tmin, tmax; |
| int tcsz = info->pdata->tcsz; |
| |
| /* get the Rntc resitance value for this temp */ |
| if (tval > info->pdata->thermistor_curve[0][1]) { |
| rntc = info->pdata->thermistor_curve[0][0]; |
| } else if (tval <= info->pdata->thermistor_curve[tcsz-1][1]) { |
| rntc = info->pdata->thermistor_curve[tcsz-1][0]; |
| } else { |
| for (i = 1; i < tcsz; i++) { |
| if (tval > info->pdata->thermistor_curve[i][1]) { |
| rmin = info->pdata->thermistor_curve[i-1][0]; |
| rmax = info->pdata->thermistor_curve[i][0]; |
| tmin = info->pdata->thermistor_curve[i-1][1]; |
| tmax = info->pdata->thermistor_curve[i][1]; |
| rntc = rmin + ((rmax - rmin) * |
| (tval - tmin) / (tmax - tmin)); |
| break; |
| } |
| } |
| } |
| |
| /* we need the current to calculate the proper adc voltage */ |
| ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE); |
| if (ret < 0) { |
| dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); |
| ret = 0x30; |
| } |
| |
| /* |
| * temperature is proportional to NTS thermistor resistance |
| * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA |
| * [12-bit ADC VAL] = R_NTC(Ω) * current / 800 |
| */ |
| adc_val = rntc * (20 + (20 * ((ret >> 4) & 0x3))) / 800; |
| |
| return adc_val; |
| } |
| |
| static int adc_to_temp(struct axp288_fg_info *info, int adc_val) |
| { |
| int ret, r, i, tval = 0; |
| int rmin, rmax, tmin, tmax; |
| int tcsz = info->pdata->tcsz; |
| |
| ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE); |
| if (ret < 0) { |
| dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); |
| ret = 0x30; |
| } |
| |
| /* |
| * temperature is proportional to NTS thermistor resistance |
| * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA |
| * R_NTC(Ω) = [12-bit ADC VAL] * 800 / current |
| */ |
| r = adc_val * 800 / (20 + (20 * ((ret >> 4) & 0x3))); |
| |
| if (r < info->pdata->thermistor_curve[0][0]) { |
| tval = info->pdata->thermistor_curve[0][1]; |
| } else if (r >= info->pdata->thermistor_curve[tcsz-1][0]) { |
| tval = info->pdata->thermistor_curve[tcsz-1][1]; |
| } else { |
| for (i = 1; i < tcsz; i++) { |
| if (r < info->pdata->thermistor_curve[i][0]) { |
| rmin = info->pdata->thermistor_curve[i-1][0]; |
| rmax = info->pdata->thermistor_curve[i][0]; |
| tmin = info->pdata->thermistor_curve[i-1][1]; |
| tmax = info->pdata->thermistor_curve[i][1]; |
| tval = tmin + ((tmax - tmin) * |
| (r - rmin) / (rmax - rmin)); |
| break; |
| } |
| } |
| } |
| |
| return tval; |
| } |
| |
| static int fuel_gauge_get_btemp(struct axp288_fg_info *info, int *btemp) |
| { |
| int ret, raw_val = 0; |
| |
| ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info); |
| if (ret < 0) |
| goto temp_read_fail; |
| |
| *btemp = adc_to_temp(info, raw_val); |
| |
| temp_read_fail: |
| return ret; |
| } |
| |
| static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv) |
| { |
| int ret, value; |
| |
| /* 12-bit data value, upper 8 in OCVH, lower 4 in OCVL */ |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG); |
| if (ret < 0) |
| goto vocv_read_fail; |
| value = ret << 4; |
| |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG); |
| if (ret < 0) |
| goto vocv_read_fail; |
| value |= (ret & 0xf); |
| |
| *vocv = VOLTAGE_FROM_ADC(value); |
| vocv_read_fail: |
| return ret; |
| } |
| |
| static int fuel_gauge_battery_health(struct axp288_fg_info *info) |
| { |
| int temp, vocv; |
| int ret, health = POWER_SUPPLY_HEALTH_UNKNOWN; |
| |
| ret = fuel_gauge_get_btemp(info, &temp); |
| if (ret < 0) |
| goto health_read_fail; |
| |
| ret = fuel_gauge_get_vocv(info, &vocv); |
| if (ret < 0) |
| goto health_read_fail; |
| |
| if (vocv > info->pdata->max_volt) |
| health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
| else if (temp > info->pdata->max_temp) |
| health = POWER_SUPPLY_HEALTH_OVERHEAT; |
| else if (temp < info->pdata->min_temp) |
| health = POWER_SUPPLY_HEALTH_COLD; |
| else if (vocv < info->pdata->min_volt) |
| health = POWER_SUPPLY_HEALTH_DEAD; |
| else |
| health = POWER_SUPPLY_HEALTH_GOOD; |
| |
| health_read_fail: |
| return health; |
| } |
| |
| static int fuel_gauge_set_high_btemp_alert(struct axp288_fg_info *info) |
| { |
| int ret, adc_val; |
| |
| /* program temperature threshold as 1/16 ADC value */ |
| adc_val = temp_to_adc(info, info->pdata->max_temp); |
| ret = fuel_gauge_reg_writeb(info, AXP20X_V_HTF_DISCHRG, adc_val >> 4); |
| |
| return ret; |
| } |
| |
| static int fuel_gauge_set_low_btemp_alert(struct axp288_fg_info *info) |
| { |
| int ret, adc_val; |
| |
| /* program temperature threshold as 1/16 ADC value */ |
| adc_val = temp_to_adc(info, info->pdata->min_temp); |
| ret = fuel_gauge_reg_writeb(info, AXP20X_V_LTF_DISCHRG, adc_val >> 4); |
| |
| return ret; |
| } |
| |
| 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 = container_of(ps, |
| struct axp288_fg_info, bat); |
| 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_TEMP: |
| ret = fuel_gauge_get_btemp(info, &value); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| val->intval = PROP_TEMP(value); |
| break; |
| case POWER_SUPPLY_PROP_TEMP_MAX: |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: |
| val->intval = PROP_TEMP(info->pdata->max_temp); |
| break; |
| case POWER_SUPPLY_PROP_TEMP_MIN: |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: |
| val->intval = PROP_TEMP(info->pdata->min_temp); |
| break; |
| case POWER_SUPPLY_PROP_TECHNOLOGY: |
| val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_NOW: |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| |
| value = (ret & FG_CC_MTR1_VAL_MASK) << 8; |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| value |= (ret & FG_CC_MTR0_VAL_MASK); |
| val->intval = value * FG_DES_CAP_RES_LSB; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_FULL: |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| |
| value = (ret & FG_DES_CAP1_VAL_MASK) << 8; |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG); |
| if (ret < 0) |
| goto fuel_gauge_read_err; |
| value |= (ret & FG_DES_CAP0_VAL_MASK); |
| val->intval = value * FG_DES_CAP_RES_LSB; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
| val->intval = PROP_CURR(info->pdata->design_cap); |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
| val->intval = PROP_VOLT(info->pdata->max_volt); |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
| val->intval = PROP_VOLT(info->pdata->min_volt); |
| break; |
| case POWER_SUPPLY_PROP_MODEL_NAME: |
| val->strval = info->pdata->battid; |
| 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 = container_of(ps, |
| struct axp288_fg_info, bat); |
| int ret = 0; |
| |
| mutex_lock(&info->lock); |
| switch (prop) { |
| case POWER_SUPPLY_PROP_STATUS: |
| info->status = val->intval; |
| break; |
| case POWER_SUPPLY_PROP_TEMP_MIN: |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: |
| if ((val->intval < PD_DEF_MIN_TEMP) || |
| (val->intval > PD_DEF_MAX_TEMP)) { |
| ret = -EINVAL; |
| break; |
| } |
| info->pdata->min_temp = UNPROP_TEMP(val->intval); |
| ret = fuel_gauge_set_low_btemp_alert(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, |
| "temp alert min set fail:%d\n", ret); |
| break; |
| case POWER_SUPPLY_PROP_TEMP_MAX: |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: |
| if ((val->intval < PD_DEF_MIN_TEMP) || |
| (val->intval > PD_DEF_MAX_TEMP)) { |
| ret = -EINVAL; |
| break; |
| } |
| info->pdata->max_temp = UNPROP_TEMP(val->intval); |
| ret = fuel_gauge_set_high_btemp_alert(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, |
| "temp alert max set fail:%d\n", ret); |
| break; |
| 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_STATUS: |
| case POWER_SUPPLY_PROP_TEMP_MIN: |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: |
| case POWER_SUPPLY_PROP_TEMP_MAX: |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: |
| case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: |
| ret = 1; |
| break; |
| default: |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| static void fuel_gauge_status_monitor(struct work_struct *work) |
| { |
| struct axp288_fg_info *info = container_of(work, |
| struct axp288_fg_info, status_monitor.work); |
| |
| fuel_gauge_get_status(info); |
| power_supply_changed(&info->bat); |
| schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES); |
| } |
| |
| 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 = container_of(psy, |
| struct axp288_fg_info, bat); |
| |
| power_supply_changed(&info->bat); |
| } |
| |
| static int fuel_gauge_set_lowbatt_thresholds(struct axp288_fg_info *info) |
| { |
| int ret; |
| u8 reg_val; |
| |
| ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); |
| if (ret < 0) { |
| dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); |
| return ret; |
| } |
| ret = (ret & FG_REP_CAP_VAL_MASK); |
| |
| if (ret > FG_LOW_CAP_WARN_THR) |
| reg_val = FG_LOW_CAP_WARN_THR; |
| else if (ret > FG_LOW_CAP_CRIT_THR) |
| reg_val = FG_LOW_CAP_CRIT_THR; |
| else |
| reg_val = FG_LOW_CAP_SHDN_THR; |
| |
| reg_val |= FG_LOW_CAP_THR1_VAL; |
| ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, reg_val); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "%s:write err:%d\n", __func__, ret); |
| |
| return ret; |
| } |
| |
| static int fuel_gauge_program_vbatt_full(struct axp288_fg_info *info) |
| { |
| int ret; |
| u8 val; |
| |
| ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1); |
| if (ret < 0) |
| goto fg_prog_ocv_fail; |
| else |
| val = (ret & ~CHRG_CCCV_CV_MASK); |
| |
| switch (info->pdata->max_volt) { |
| case CV_4100: |
| val |= (CHRG_CCCV_CV_4100MV << CHRG_CCCV_CV_BIT_POS); |
| break; |
| case CV_4150: |
| val |= (CHRG_CCCV_CV_4150MV << CHRG_CCCV_CV_BIT_POS); |
| break; |
| case CV_4200: |
| val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS); |
| break; |
| case CV_4350: |
| val |= (CHRG_CCCV_CV_4350MV << CHRG_CCCV_CV_BIT_POS); |
| break; |
| default: |
| val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS); |
| break; |
| } |
| |
| ret = fuel_gauge_reg_writeb(info, AXP20X_CHRG_CTRL1, val); |
| fg_prog_ocv_fail: |
| return ret; |
| } |
| |
| static int fuel_gauge_program_design_cap(struct axp288_fg_info *info) |
| { |
| int ret; |
| |
| ret = fuel_gauge_reg_writeb(info, |
| AXP288_FG_DES_CAP1_REG, info->pdata->cap1); |
| if (ret < 0) |
| goto fg_prog_descap_fail; |
| |
| ret = fuel_gauge_reg_writeb(info, |
| AXP288_FG_DES_CAP0_REG, info->pdata->cap0); |
| |
| fg_prog_descap_fail: |
| return ret; |
| } |
| |
| static int fuel_gauge_program_ocv_curve(struct axp288_fg_info *info) |
| { |
| int ret = 0, i; |
| |
| for (i = 0; i < OCV_CURVE_SIZE; i++) { |
| ret = fuel_gauge_reg_writeb(info, |
| AXP288_FG_OCV_CURVE_REG + i, info->pdata->ocv_curve[i]); |
| if (ret < 0) |
| goto fg_prog_ocv_fail; |
| } |
| |
| fg_prog_ocv_fail: |
| return ret; |
| } |
| |
| static int fuel_gauge_program_rdc_vals(struct axp288_fg_info *info) |
| { |
| int ret; |
| |
| ret = fuel_gauge_reg_writeb(info, |
| AXP288_FG_RDC1_REG, info->pdata->rdc1); |
| if (ret < 0) |
| goto fg_prog_ocv_fail; |
| |
| ret = fuel_gauge_reg_writeb(info, |
| AXP288_FG_RDC0_REG, info->pdata->rdc0); |
| |
| fg_prog_ocv_fail: |
| return ret; |
| } |
| |
| static void fuel_gauge_init_config_regs(struct axp288_fg_info *info) |
| { |
| int ret; |
| |
| /* |
| * check if the config data is already |
| * programmed and if so just return. |
| */ |
| |
| ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); |
| if (ret < 0) { |
| dev_warn(&info->pdev->dev, "CAP1 reg read err!!\n"); |
| } else if (!(ret & FG_DES_CAP1_VALID)) { |
| dev_info(&info->pdev->dev, "FG data needs to be initialized\n"); |
| } else { |
| dev_info(&info->pdev->dev, "FG data is already initialized\n"); |
| return; |
| } |
| |
| ret = fuel_gauge_program_vbatt_full(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "set vbatt full fail:%d\n", ret); |
| |
| ret = fuel_gauge_program_design_cap(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "set design cap fail:%d\n", ret); |
| |
| ret = fuel_gauge_program_rdc_vals(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "set rdc fail:%d\n", ret); |
| |
| ret = fuel_gauge_program_ocv_curve(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "set ocv curve fail:%d\n", ret); |
| |
| ret = fuel_gauge_set_lowbatt_thresholds(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "lowbatt thr set fail:%d\n", ret); |
| |
| ret = fuel_gauge_reg_writeb(info, AXP20X_CC_CTRL, 0xef); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "gauge cntl set fail:%d\n", ret); |
| } |
| |
| 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; |
| } |
| } |
| |
| static void fuel_gauge_init_hw_regs(struct axp288_fg_info *info) |
| { |
| int ret; |
| unsigned int val; |
| |
| ret = fuel_gauge_set_high_btemp_alert(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "high batt temp set fail:%d\n", ret); |
| |
| ret = fuel_gauge_set_low_btemp_alert(info); |
| if (ret < 0) |
| dev_err(&info->pdev->dev, "low batt temp set fail:%d\n", ret); |
| |
| /* enable interrupts */ |
| val = fuel_gauge_reg_readb(info, AXP20X_IRQ3_EN); |
| val |= TEMP_IRQ_CFG_MASK; |
| fuel_gauge_reg_writeb(info, AXP20X_IRQ3_EN, val); |
| |
| val = fuel_gauge_reg_readb(info, AXP20X_IRQ4_EN); |
| val |= FG_IRQ_CFG_LOWBATT_MASK; |
| val = fuel_gauge_reg_writeb(info, AXP20X_IRQ4_EN, val); |
| } |
| |
| static int axp288_fuel_gauge_probe(struct platform_device *pdev) |
| { |
| int ret; |
| struct axp288_fg_info *info; |
| struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); |
| |
| 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; |
| info->pdata = pdev->dev.platform_data; |
| if (!info->pdata) |
| return -ENODEV; |
| |
| platform_set_drvdata(pdev, info); |
| |
| mutex_init(&info->lock); |
| INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor); |
| |
| info->bat.name = DEV_NAME; |
| info->bat.type = POWER_SUPPLY_TYPE_BATTERY; |
| info->bat.properties = fuel_gauge_props; |
| info->bat.num_properties = ARRAY_SIZE(fuel_gauge_props); |
| info->bat.get_property = fuel_gauge_get_property; |
| info->bat.set_property = fuel_gauge_set_property; |
| info->bat.property_is_writeable = fuel_gauge_property_is_writeable; |
| info->bat.external_power_changed = fuel_gauge_external_power_changed; |
| ret = power_supply_register(&pdev->dev, &info->bat, NULL); |
| if (ret) { |
| dev_err(&pdev->dev, "failed to register battery: %d\n", ret); |
| return ret; |
| } |
| |
| fuel_gauge_create_debugfs(info); |
| fuel_gauge_init_config_regs(info); |
| fuel_gauge_init_irq(info); |
| fuel_gauge_init_hw_regs(info); |
| schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES); |
| |
| return ret; |
| } |
| |
| static struct platform_device_id axp288_fg_id_table[] = { |
| { .name = DEV_NAME }, |
| {}, |
| }; |
| |
| static int axp288_fuel_gauge_remove(struct platform_device *pdev) |
| { |
| struct axp288_fg_info *info = platform_get_drvdata(pdev); |
| int i; |
| |
| cancel_delayed_work_sync(&info->status_monitor); |
| 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); |
| |
| 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("Todd Brandt <todd.e.brandt@linux.intel.com>"); |
| MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver"); |
| MODULE_LICENSE("GPL"); |