Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Todd E Brandt | 2275 | 59.62% | 1 | 5.56% |
Hans de Goede | 1476 | 38.68% | 10 | 55.56% |
Krzysztof Kozlowski | 31 | 0.81% | 3 | 16.67% |
Carlo Caione | 15 | 0.39% | 1 | 5.56% |
Sebastian Reichel | 7 | 0.18% | 1 | 5.56% |
Javier Martinez Canillas | 7 | 0.18% | 1 | 5.56% |
Ramakrishna Pallala | 5 | 0.13% | 1 | 5.56% |
Total | 3816 | 18 |
/* * 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 * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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/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; } 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, 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[] = { { /* 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");
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