zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/power/max17042_battery.c b/ap/os/linux/linux-3.4.x/drivers/power/max17042_battery.c
new file mode 100644
index 0000000..04620c2
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/power/max17042_battery.c
@@ -0,0 +1,751 @@
+/*
+ * Fuel gauge driver for Maxim 17042 / 8966 / 8997
+ * Note that Maxim 8966 and 8997 are mfd and this is its subdevice.
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This driver is based on max17040_battery.c
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mod_devicetable.h>
+#include <linux/power_supply.h>
+#include <linux/power/max17042_battery.h>
+#include <linux/of.h>
+
+/* Status register bits */
+#define STATUS_POR_BIT (1 << 1)
+#define STATUS_BST_BIT (1 << 3)
+#define STATUS_VMN_BIT (1 << 8)
+#define STATUS_TMN_BIT (1 << 9)
+#define STATUS_SMN_BIT (1 << 10)
+#define STATUS_BI_BIT (1 << 11)
+#define STATUS_VMX_BIT (1 << 12)
+#define STATUS_TMX_BIT (1 << 13)
+#define STATUS_SMX_BIT (1 << 14)
+#define STATUS_BR_BIT (1 << 15)
+
+/* Interrupt mask bits */
+#define CONFIG_ALRT_BIT_ENBL (1 << 2)
+#define STATUS_INTR_SOCMIN_BIT (1 << 10)
+#define STATUS_INTR_SOCMAX_BIT (1 << 14)
+
+#define VFSOC0_LOCK 0x0000
+#define VFSOC0_UNLOCK 0x0080
+#define MODEL_UNLOCK1 0X0059
+#define MODEL_UNLOCK2 0X00C4
+#define MODEL_LOCK1 0X0000
+#define MODEL_LOCK2 0X0000
+
+#define dQ_ACC_DIV 0x4
+#define dP_ACC_100 0x1900
+#define dP_ACC_200 0x3200
+
+struct max17042_chip {
+ struct i2c_client *client;
+ struct power_supply battery;
+ struct max17042_platform_data *pdata;
+ struct work_struct work;
+ int init_complete;
+};
+
+static int max17042_write_reg(struct i2c_client *client, u8 reg, u16 value)
+{
+ int ret = i2c_smbus_write_word_data(client, reg, value);
+
+ if (ret < 0)
+ dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+
+ return ret;
+}
+
+static int max17042_read_reg(struct i2c_client *client, u8 reg)
+{
+ int ret = i2c_smbus_read_word_data(client, reg);
+
+ if (ret < 0)
+ dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+
+ return ret;
+}
+
+static void max17042_set_reg(struct i2c_client *client,
+ struct max17042_reg_data *data, int size)
+{
+ int i;
+
+ for (i = 0; i < size; i++)
+ max17042_write_reg(client, data[i].addr, data[i].data);
+}
+
+static enum power_supply_property max17042_battery_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CYCLE_COUNT,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+};
+
+static int max17042_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct max17042_chip *chip = container_of(psy,
+ struct max17042_chip, battery);
+ int ret;
+
+ if (!chip->init_complete)
+ return -EAGAIN;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ ret = max17042_read_reg(chip->client, MAX17042_STATUS);
+ if (ret < 0)
+ return ret;
+
+ if (ret & MAX17042_STATUS_BattAbsent)
+ val->intval = 0;
+ else
+ val->intval = 1;
+ break;
+ case POWER_SUPPLY_PROP_CYCLE_COUNT:
+ ret = max17042_read_reg(chip->client, MAX17042_Cycles);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ ret = max17042_read_reg(chip->client, MAX17042_MinMaxVolt);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret >> 8;
+ val->intval *= 20000; /* Units of LSB = 20mV */
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ ret = max17042_read_reg(chip->client, MAX17042_V_empty);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret >> 7;
+ val->intval *= 10000; /* Units of LSB = 10mV */
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = max17042_read_reg(chip->client, MAX17042_VCELL);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret * 625 / 8;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ ret = max17042_read_reg(chip->client, MAX17042_AvgVCELL);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret * 625 / 8;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ ret = max17042_read_reg(chip->client, MAX17042_RepSOC);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret >> 8;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
+ ret = max17042_read_reg(chip->client, MAX17042_FullCAP);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret * 1000 / 2;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ ret = max17042_read_reg(chip->client, MAX17042_TEMP);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret;
+ /* The value is signed. */
+ if (val->intval & 0x8000) {
+ val->intval = (0x7fff & ~val->intval) + 1;
+ val->intval *= -1;
+ }
+ /* The value is converted into deci-centigrade scale */
+ /* Units of LSB = 1 / 256 degree Celsius */
+ val->intval = val->intval * 10 / 256;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ if (chip->pdata->enable_current_sense) {
+ ret = max17042_read_reg(chip->client, MAX17042_Current);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret;
+ if (val->intval & 0x8000) {
+ /* Negative */
+ val->intval = ~val->intval & 0x7fff;
+ val->intval++;
+ val->intval *= -1;
+ }
+ val->intval *= 1562500 / chip->pdata->r_sns;
+ } else {
+ return -EINVAL;
+ }
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ if (chip->pdata->enable_current_sense) {
+ ret = max17042_read_reg(chip->client,
+ MAX17042_AvgCurrent);
+ if (ret < 0)
+ return ret;
+
+ val->intval = ret;
+ if (val->intval & 0x8000) {
+ /* Negative */
+ val->intval = ~val->intval & 0x7fff;
+ val->intval++;
+ val->intval *= -1;
+ }
+ val->intval *= 1562500 / chip->pdata->r_sns;
+ } else {
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int max17042_write_verify_reg(struct i2c_client *client,
+ u8 reg, u16 value)
+{
+ int retries = 8;
+ int ret;
+ u16 read_value;
+
+ do {
+ ret = i2c_smbus_write_word_data(client, reg, value);
+ read_value = max17042_read_reg(client, reg);
+ if (read_value != value) {
+ ret = -EIO;
+ retries--;
+ }
+ } while (retries && read_value != value);
+
+ if (ret < 0)
+ dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+
+ return ret;
+}
+
+static inline void max17042_override_por(
+ struct i2c_client *client, u8 reg, u16 value)
+{
+ if (value)
+ max17042_write_reg(client, reg, value);
+}
+
+static inline void max10742_unlock_model(struct max17042_chip *chip)
+{
+ struct i2c_client *client = chip->client;
+ max17042_write_reg(client, MAX17042_MLOCKReg1, MODEL_UNLOCK1);
+ max17042_write_reg(client, MAX17042_MLOCKReg2, MODEL_UNLOCK2);
+}
+
+static inline void max10742_lock_model(struct max17042_chip *chip)
+{
+ struct i2c_client *client = chip->client;
+ max17042_write_reg(client, MAX17042_MLOCKReg1, MODEL_LOCK1);
+ max17042_write_reg(client, MAX17042_MLOCKReg2, MODEL_LOCK2);
+}
+
+static inline void max17042_write_model_data(struct max17042_chip *chip,
+ u8 addr, int size)
+{
+ struct i2c_client *client = chip->client;
+ int i;
+ for (i = 0; i < size; i++)
+ max17042_write_reg(client, addr + i,
+ chip->pdata->config_data->cell_char_tbl[i]);
+}
+
+static inline void max17042_read_model_data(struct max17042_chip *chip,
+ u8 addr, u16 *data, int size)
+{
+ struct i2c_client *client = chip->client;
+ int i;
+
+ for (i = 0; i < size; i++)
+ data[i] = max17042_read_reg(client, addr + i);
+}
+
+static inline int max17042_model_data_compare(struct max17042_chip *chip,
+ u16 *data1, u16 *data2, int size)
+{
+ int i;
+
+ if (memcmp(data1, data2, size)) {
+ dev_err(&chip->client->dev, "%s compare failed\n", __func__);
+ for (i = 0; i < size; i++)
+ dev_info(&chip->client->dev, "0x%x, 0x%x",
+ data1[i], data2[i]);
+ dev_info(&chip->client->dev, "\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int max17042_init_model(struct max17042_chip *chip)
+{
+ int ret;
+ int table_size =
+ sizeof(chip->pdata->config_data->cell_char_tbl)/sizeof(u16);
+ u16 *temp_data;
+
+ temp_data = kzalloc(table_size, GFP_KERNEL);
+ if (!temp_data)
+ return -ENOMEM;
+
+ max10742_unlock_model(chip);
+ max17042_write_model_data(chip, MAX17042_MODELChrTbl,
+ table_size);
+ max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data,
+ table_size);
+
+ ret = max17042_model_data_compare(
+ chip,
+ chip->pdata->config_data->cell_char_tbl,
+ temp_data,
+ table_size);
+
+ max10742_lock_model(chip);
+ kfree(temp_data);
+
+ return ret;
+}
+
+static int max17042_verify_model_lock(struct max17042_chip *chip)
+{
+ int i;
+ int table_size =
+ sizeof(chip->pdata->config_data->cell_char_tbl);
+ u16 *temp_data;
+ int ret = 0;
+
+ temp_data = kzalloc(table_size, GFP_KERNEL);
+ if (!temp_data)
+ return -ENOMEM;
+
+ max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data,
+ table_size);
+ for (i = 0; i < table_size; i++)
+ if (temp_data[i])
+ ret = -EINVAL;
+
+ kfree(temp_data);
+ return ret;
+}
+
+static void max17042_write_config_regs(struct max17042_chip *chip)
+{
+ struct max17042_config_data *config = chip->pdata->config_data;
+
+ max17042_write_reg(chip->client, MAX17042_CONFIG, config->config);
+ max17042_write_reg(chip->client, MAX17042_LearnCFG, config->learn_cfg);
+ max17042_write_reg(chip->client, MAX17042_FilterCFG,
+ config->filter_cfg);
+ max17042_write_reg(chip->client, MAX17042_RelaxCFG, config->relax_cfg);
+}
+
+static void max17042_write_custom_regs(struct max17042_chip *chip)
+{
+ struct max17042_config_data *config = chip->pdata->config_data;
+
+ max17042_write_verify_reg(chip->client, MAX17042_RCOMP0,
+ config->rcomp0);
+ max17042_write_verify_reg(chip->client, MAX17042_TempCo,
+ config->tcompc0);
+ max17042_write_reg(chip->client, MAX17042_EmptyTempCo,
+ config->empty_tempco);
+ max17042_write_verify_reg(chip->client, MAX17042_K_empty0,
+ config->kempty0);
+ max17042_write_verify_reg(chip->client, MAX17042_ICHGTerm,
+ config->ichgt_term);
+}
+
+static void max17042_update_capacity_regs(struct max17042_chip *chip)
+{
+ struct max17042_config_data *config = chip->pdata->config_data;
+
+ max17042_write_verify_reg(chip->client, MAX17042_FullCAP,
+ config->fullcap);
+ max17042_write_reg(chip->client, MAX17042_DesignCap,
+ config->design_cap);
+ max17042_write_verify_reg(chip->client, MAX17042_FullCAPNom,
+ config->fullcapnom);
+}
+
+static void max17042_reset_vfsoc0_reg(struct max17042_chip *chip)
+{
+ u16 vfSoc;
+
+ vfSoc = max17042_read_reg(chip->client, MAX17042_VFSOC);
+ max17042_write_reg(chip->client, MAX17042_VFSOC0Enable, VFSOC0_UNLOCK);
+ max17042_write_verify_reg(chip->client, MAX17042_VFSOC0, vfSoc);
+ max17042_write_reg(chip->client, MAX17042_VFSOC0Enable, VFSOC0_LOCK);
+}
+
+static void max17042_load_new_capacity_params(struct max17042_chip *chip)
+{
+ u16 full_cap0, rep_cap, dq_acc, vfSoc;
+ u32 rem_cap;
+
+ struct max17042_config_data *config = chip->pdata->config_data;
+
+ full_cap0 = max17042_read_reg(chip->client, MAX17042_FullCAP0);
+ vfSoc = max17042_read_reg(chip->client, MAX17042_VFSOC);
+
+ /* fg_vfSoc needs to shifted by 8 bits to get the
+ * perc in 1% accuracy, to get the right rem_cap multiply
+ * full_cap0, fg_vfSoc and devide by 100
+ */
+ rem_cap = ((vfSoc >> 8) * full_cap0) / 100;
+ max17042_write_verify_reg(chip->client, MAX17042_RemCap, (u16)rem_cap);
+
+ rep_cap = (u16)rem_cap;
+ max17042_write_verify_reg(chip->client, MAX17042_RepCap, rep_cap);
+
+ /* Write dQ_acc to 200% of Capacity and dP_acc to 200% */
+ dq_acc = config->fullcap / dQ_ACC_DIV;
+ max17042_write_verify_reg(chip->client, MAX17042_dQacc, dq_acc);
+ max17042_write_verify_reg(chip->client, MAX17042_dPacc, dP_ACC_200);
+
+ max17042_write_verify_reg(chip->client, MAX17042_FullCAP,
+ config->fullcap);
+ max17042_write_reg(chip->client, MAX17042_DesignCap,
+ config->design_cap);
+ max17042_write_verify_reg(chip->client, MAX17042_FullCAPNom,
+ config->fullcapnom);
+}
+
+/*
+ * Block write all the override values coming from platform data.
+ * This function MUST be called before the POR initialization proceedure
+ * specified by maxim.
+ */
+static inline void max17042_override_por_values(struct max17042_chip *chip)
+{
+ struct i2c_client *client = chip->client;
+ struct max17042_config_data *config = chip->pdata->config_data;
+
+ max17042_override_por(client, MAX17042_TGAIN, config->tgain);
+ max17042_override_por(client, MAx17042_TOFF, config->toff);
+ max17042_override_por(client, MAX17042_CGAIN, config->cgain);
+ max17042_override_por(client, MAX17042_COFF, config->coff);
+
+ max17042_override_por(client, MAX17042_VALRT_Th, config->valrt_thresh);
+ max17042_override_por(client, MAX17042_TALRT_Th, config->talrt_thresh);
+ max17042_override_por(client, MAX17042_SALRT_Th,
+ config->soc_alrt_thresh);
+ max17042_override_por(client, MAX17042_CONFIG, config->config);
+ max17042_override_por(client, MAX17042_SHDNTIMER, config->shdntimer);
+
+ max17042_override_por(client, MAX17042_DesignCap, config->design_cap);
+ max17042_override_por(client, MAX17042_ICHGTerm, config->ichgt_term);
+
+ max17042_override_por(client, MAX17042_AtRate, config->at_rate);
+ max17042_override_por(client, MAX17042_LearnCFG, config->learn_cfg);
+ max17042_override_por(client, MAX17042_FilterCFG, config->filter_cfg);
+ max17042_override_por(client, MAX17042_RelaxCFG, config->relax_cfg);
+ max17042_override_por(client, MAX17042_MiscCFG, config->misc_cfg);
+ max17042_override_por(client, MAX17042_MaskSOC, config->masksoc);
+
+ max17042_override_por(client, MAX17042_FullCAP, config->fullcap);
+ max17042_override_por(client, MAX17042_FullCAPNom, config->fullcapnom);
+ max17042_override_por(client, MAX17042_SOC_empty, config->socempty);
+ max17042_override_por(client, MAX17042_LAvg_empty, config->lavg_empty);
+ max17042_override_por(client, MAX17042_dQacc, config->dqacc);
+ max17042_override_por(client, MAX17042_dPacc, config->dpacc);
+
+ max17042_override_por(client, MAX17042_V_empty, config->vempty);
+ max17042_override_por(client, MAX17042_TempNom, config->temp_nom);
+ max17042_override_por(client, MAX17042_TempLim, config->temp_lim);
+ max17042_override_por(client, MAX17042_FCTC, config->fctc);
+ max17042_override_por(client, MAX17042_RCOMP0, config->rcomp0);
+ max17042_override_por(client, MAX17042_TempCo, config->tcompc0);
+ max17042_override_por(client, MAX17042_EmptyTempCo,
+ config->empty_tempco);
+ max17042_override_por(client, MAX17042_K_empty0, config->kempty0);
+}
+
+static int max17042_init_chip(struct max17042_chip *chip)
+{
+ int ret;
+ int val;
+
+ max17042_override_por_values(chip);
+ /* After Power up, the MAX17042 requires 500mS in order
+ * to perform signal debouncing and initial SOC reporting
+ */
+ msleep(500);
+
+ /* Initialize configaration */
+ max17042_write_config_regs(chip);
+
+ /* write cell characterization data */
+ ret = max17042_init_model(chip);
+ if (ret) {
+ dev_err(&chip->client->dev, "%s init failed\n",
+ __func__);
+ return -EIO;
+ }
+ max17042_verify_model_lock(chip);
+ if (ret) {
+ dev_err(&chip->client->dev, "%s lock verify failed\n",
+ __func__);
+ return -EIO;
+ }
+ /* write custom parameters */
+ max17042_write_custom_regs(chip);
+
+ /* update capacity params */
+ max17042_update_capacity_regs(chip);
+
+ /* delay must be atleast 350mS to allow VFSOC
+ * to be calculated from the new configuration
+ */
+ msleep(350);
+
+ /* reset vfsoc0 reg */
+ max17042_reset_vfsoc0_reg(chip);
+
+ /* load new capacity params */
+ max17042_load_new_capacity_params(chip);
+
+ /* Init complete, Clear the POR bit */
+ val = max17042_read_reg(chip->client, MAX17042_STATUS);
+ max17042_write_reg(chip->client, MAX17042_STATUS,
+ val & (~STATUS_POR_BIT));
+ return 0;
+}
+
+static void max17042_set_soc_threshold(struct max17042_chip *chip, u16 off)
+{
+ u16 soc, soc_tr;
+
+ /* program interrupt thesholds such that we should
+ * get interrupt for every 'off' perc change in the soc
+ */
+ soc = max17042_read_reg(chip->client, MAX17042_RepSOC) >> 8;
+ soc_tr = (soc + off) << 8;
+ soc_tr |= (soc - off);
+ max17042_write_reg(chip->client, MAX17042_SALRT_Th, soc_tr);
+}
+
+static irqreturn_t max17042_thread_handler(int id, void *dev)
+{
+ struct max17042_chip *chip = dev;
+ u16 val;
+
+ val = max17042_read_reg(chip->client, MAX17042_STATUS);
+ if ((val & STATUS_INTR_SOCMIN_BIT) ||
+ (val & STATUS_INTR_SOCMAX_BIT)) {
+ dev_info(&chip->client->dev, "SOC threshold INTR\n");
+ max17042_set_soc_threshold(chip, 1);
+ }
+
+ power_supply_changed(&chip->battery);
+ return IRQ_HANDLED;
+}
+
+static void max17042_init_worker(struct work_struct *work)
+{
+ struct max17042_chip *chip = container_of(work,
+ struct max17042_chip, work);
+ int ret;
+
+ /* Initialize registers according to values from the platform data */
+ if (chip->pdata->enable_por_init && chip->pdata->config_data) {
+ ret = max17042_init_chip(chip);
+ if (ret)
+ return;
+ }
+
+ chip->init_complete = 1;
+}
+
+#ifdef CONFIG_OF
+static struct max17042_platform_data *
+max17042_get_pdata(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ u32 prop;
+ struct max17042_platform_data *pdata;
+
+ if (!np)
+ return dev->platform_data;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ /*
+ * Require current sense resistor value to be specified for
+ * current-sense functionality to be enabled at all.
+ */
+ if (of_property_read_u32(np, "maxim,rsns-microohm", &prop) == 0) {
+ pdata->r_sns = prop;
+ pdata->enable_current_sense = true;
+ }
+
+ return pdata;
+}
+#else
+static struct max17042_platform_data *
+max17042_get_pdata(struct device *dev)
+{
+ return dev->platform_data;
+}
+#endif
+
+static int __devinit max17042_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct max17042_chip *chip;
+ int ret;
+ int reg;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
+ return -EIO;
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->client = client;
+ chip->pdata = max17042_get_pdata(&client->dev);
+ if (!chip->pdata) {
+ dev_err(&client->dev, "no platform data provided\n");
+ return -EINVAL;
+ }
+
+ i2c_set_clientdata(client, chip);
+
+ chip->battery.name = "max17042_battery";
+ chip->battery.type = POWER_SUPPLY_TYPE_BATTERY;
+ chip->battery.get_property = max17042_get_property;
+ chip->battery.properties = max17042_battery_props;
+ chip->battery.num_properties = ARRAY_SIZE(max17042_battery_props);
+
+ /* When current is not measured,
+ * CURRENT_NOW and CURRENT_AVG properties should be invisible. */
+ if (!chip->pdata->enable_current_sense)
+ chip->battery.num_properties -= 2;
+
+ if (chip->pdata->r_sns == 0)
+ chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR;
+
+ if (chip->pdata->init_data)
+ max17042_set_reg(client, chip->pdata->init_data,
+ chip->pdata->num_init_data);
+
+ if (!chip->pdata->enable_current_sense) {
+ max17042_write_reg(client, MAX17042_CGAIN, 0x0000);
+ max17042_write_reg(client, MAX17042_MiscCFG, 0x0003);
+ max17042_write_reg(client, MAX17042_LearnCFG, 0x0007);
+ }
+
+ if (client->irq) {
+ ret = request_threaded_irq(client->irq, NULL,
+ max17042_thread_handler,
+ IRQF_TRIGGER_FALLING,
+ chip->battery.name, chip);
+ if (!ret) {
+ reg = max17042_read_reg(client, MAX17042_CONFIG);
+ reg |= CONFIG_ALRT_BIT_ENBL;
+ max17042_write_reg(client, MAX17042_CONFIG, reg);
+ max17042_set_soc_threshold(chip, 1);
+ } else
+ dev_err(&client->dev, "%s(): cannot get IRQ\n",
+ __func__);
+ }
+
+ reg = max17042_read_reg(chip->client, MAX17042_STATUS);
+
+ if (reg & STATUS_POR_BIT) {
+ INIT_WORK(&chip->work, max17042_init_worker);
+ schedule_work(&chip->work);
+ } else {
+ chip->init_complete = 1;
+ }
+
+ ret = power_supply_register(&client->dev, &chip->battery);
+ if (ret)
+ dev_err(&client->dev, "failed: power supply register\n");
+ return ret;
+}
+
+static int __devexit max17042_remove(struct i2c_client *client)
+{
+ struct max17042_chip *chip = i2c_get_clientdata(client);
+
+ power_supply_unregister(&chip->battery);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id max17042_dt_match[] = {
+ { .compatible = "maxim,max17042" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, max17042_dt_match);
+#endif
+
+static const struct i2c_device_id max17042_id[] = {
+ { "max17042", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max17042_id);
+
+static struct i2c_driver max17042_i2c_driver = {
+ .driver = {
+ .name = "max17042",
+ .of_match_table = of_match_ptr(max17042_dt_match),
+ },
+ .probe = max17042_probe,
+ .remove = __devexit_p(max17042_remove),
+ .id_table = max17042_id,
+};
+module_i2c_driver(max17042_i2c_driver);
+
+MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
+MODULE_DESCRIPTION("MAX17042 Fuel Gauge");
+MODULE_LICENSE("GPL");