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- // 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, "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->pdev->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->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.
- * Please keep this listed sorted alphabetically.
- */
- 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"),
- },
- },
- {
- /* ECS EF20EA */
- .matches = {
- DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
- },
- },
- {
- /* Intel Cherry Trail Compute Stick, Windows version */
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
- DMI_MATCH(DMI_PRODUCT_NAME, "STK1AW32SC"),
- },
- },
- {
- /* Intel Cherry Trail Compute Stick, version without an OS */
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
- DMI_MATCH(DMI_PRODUCT_NAME, "STK1A32SC"),
- },
- },
- {
- /* Meegopad T02 */
- .matches = {
- DMI_MATCH(DMI_PRODUCT_NAME, "MEEGOPAD T02"),
- },
- },
- {
- /* 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"),
- },
- },
- {
- /* Minix Neo Z83-4 mini PC */
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "MINIX"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
- }
- },
- {}
- };
- 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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