RE: [PATCH RESEND v3 3/3] X-Power AXP288 PMIC Fuel Gauge Driver

* RE: [PATCH RESEND v3 3/3] X-Power AXP288 PMIC Fuel Gauge Driver
  2015-02-02 23:41 ` [PATCH RESEND v3 3/3] X-Power AXP288 PMIC Fuel Gauge Driver Todd Brandt
@ 2015-02-02 20:57   ` Brandt, Todd E
  2015-02-04 15:07     ` sre
  0 siblings, 1 reply; 7+ messages in thread
From: Brandt, Todd E @ 2015-02-02 20:57 UTC (permalink / raw)
  To: Todd Brandt, sre, dbaryshkov, Woodhouse, David
  Cc: linux-pm, linux-iio, linux-kernel, jacob.jun.pan, sameo,
	lee.jones, dwmw2, jic23

Hi Dmitry and Sebastian, can we get this driver included for 3.20?

Regards
Todd Brandt

________________________________________
From: Todd Brandt [todd.e.brandt@linux.intel.com]
Sent: Monday, February 02, 2015 12:44 PM
To: sre@kernel.org; dbaryshkov@gmail.com; Woodhouse, David
Cc: linux-pm@vger.kernel.org; linux-iio@vger.kernel.org; linux-kernel@vger.kernel.org; todd.e.brandt@linux.intel.com; Brandt, Todd E; jacob.jun.pan@linux.intel.com; sameo@linux.intel.com; lee.jones@linaro.org; dwmw2@infradead.org; jic23@kernel.org
Subject: [PATCH RESEND v3 3/3] X-Power AXP288 PMIC Fuel Gauge Driver

New power_supply driver at driver/power which interfaces with the
axp20x mfd driver as a cell. Provides battery info, monitors for
changes, and generates alerts on temperature and capacity issues

Signed-off-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Acked-by:  Jacob Pan <jacob.jun.pan@linux.intel.com>
---
 drivers/power/Kconfig             |    9 +
 drivers/power/Makefile            |    1 +
 drivers/power/axp288_fuel_gauge.c | 1151 +++++++++++++++++++++++++++++++++++++
 3 files changed, 1161 insertions(+)
 create mode 100644 drivers/power/axp288_fuel_gauge.c

v1: 01/07/14
v2: 01/22/14
- reformatted the commit text
- added IIO as driver dependency
- moved debug info to debugfs in file fuelgauge
- added HEALTH_COLD value to health calculation
- added better cleanup to remove call
        cancelling any delayed work calls
        unregistration of the power_supply
v3: 01/28/14
- moved debugs create and init config regs after error case
- freed the virqs in the remove function
- remove .owner field as it is populated automatically

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 0108c2a..a1166e0 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -192,6 +192,15 @@ config BATTERY_DA9052
          Say Y here to enable support for batteries charger integrated into
          DA9052 PMIC.

+config AXP288_FUEL_GAUGE
+       tristate "X-Powers AXP288 Fuel Gauge"
+       depends on MFD_AXP20X && IIO
+       help
+         Say yes here to have support for X-Power power management IC (PMIC)
+         Fuel Gauge. The device provides battery statistics and status
+         monitoring as well as alerts for battery over/under voltage and
+         over/under temperature.
+
 config BATTERY_MAX17040
        tristate "Maxim MAX17040 Fuel Gauge"
        depends on I2C
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index dfa8942..eb76b23 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -59,3 +59,4 @@ obj-$(CONFIG_POWER_AVS)               += avs/
 obj-$(CONFIG_CHARGER_SMB347)   += smb347-charger.o
 obj-$(CONFIG_CHARGER_TPS65090) += tps65090-charger.o
 obj-$(CONFIG_POWER_RESET)      += reset/
+obj-$(CONFIG_AXP288_FUEL_GAUGE) += axp288_fuel_gauge.o
diff --git a/drivers/power/axp288_fuel_gauge.c b/drivers/power/axp288_fuel_gauge.c
new file mode 100644
index 0000000..c86e709
--- /dev/null
+++ b/drivers/power/axp288_fuel_gauge.c
@@ -0,0 +1,1151 @@
+/*
+ * 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);
+       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");
--
1.9.1


^ permalink raw reply related	[flat|nested] 7+ messages in thread