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linux/drivers/power/supply/axp288_fuel_gauge.c

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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, "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.
* 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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