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max17047_fuelgauge.c
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max17047_fuelgauge.c
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/*
* max17047_fuelgauge.c
*
* Copyright (C) 2011 Samsung Electronics
* SangYoung Son <hello.son@samsung.com>
*
* based on max17040_battery.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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/init.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/power_supply.h>
#include <linux/battery/samsung_battery.h>
#include <linux/battery/max17047_fuelgauge.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <plat/gpio-cfg.h>
#include <linux/rtc.h>
#if defined(CONFIG_TARGET_LOCALE_KOR) || defined(CONFIG_MACH_M0_CTC)
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#endif
#endif
/* TRIM ERROR DETECTION */
#define USE_TRIM_ERROR_DETECTION
/* MAX17047 Registers. */
#define MAX17047_REG_STATUS 0x00
#define MAX17047_REG_VALRT_TH 0x01
#define MAX17047_REG_TALRT_TH 0x02
#define MAX17047_REG_SALRT_TH 0x03
#define MAX17047_REG_VCELL 0x09
#define MAX17047_REG_TEMPERATURE 0x08
#define MAX17047_REG_AVGVCELL 0x19
#define MAX17047_REG_CONFIG 0x1D
#define MAX17047_REG_VERSION 0x21
#define MAX17047_REG_LEARNCFG 0x28
#define MAX17047_REG_FILTERCFG 0x29
#define MAX17047_REG_MISCCFG 0x2B
#define MAX17047_REG_CGAIN 0x2E
#define MAX17047_REG_RCOMP 0x38
#define MAX17047_REG_VFOCV 0xFB
#define MAX17047_REG_SOC_VF 0xFF
/* Polling work */
#undef DEBUG_FUELGAUGE_POLLING
#define MAX17047_POLLING_INTERVAL 10000
/* adjust full soc */
#define FULL_SOC_DEFAULT 9850
#define FULL_SOC_LOW 9700
#define FULL_SOC_HIGH 10000
#define KEEP_SOC_DEFAULT 50 /* 0.5% */
struct max17047_fuelgauge_data {
struct i2c_client *client;
struct max17047_platform_data *pdata;
struct power_supply fuelgauge;
/* workqueue */
struct delayed_work update_work;
#ifdef DEBUG_FUELGAUGE_POLLING
struct delayed_work polling_work;
#endif
/* mutex */
struct mutex irq_lock;
/* wakelock */
struct wake_lock update_wake_lock;
unsigned int irq;
unsigned int vcell;
unsigned int avgvcell;
unsigned int vfocv;
unsigned int soc;
unsigned int rawsoc;
unsigned int temperature;
/* adjust full soc */
int full_soc;
#ifdef USE_TRIM_ERROR_DETECTION
/* trim error state */
bool trim_err;
#endif
#ifdef CONFIG_DEBUG_FS
struct dentry *fg_debugfs_dir;
#endif
#ifdef CONFIG_HIBERNATION
u8 *reg_dump;
#endif
};
static int max17047_i2c_read(struct i2c_client *client, int reg, u8 *buf)
{
int ret;
ret = i2c_smbus_read_i2c_block_data(client, reg, 2, buf);
if (ret < 0)
pr_err("%s: err %d, reg: 0x%02x\n", __func__, ret, reg);
return ret;
}
static int max17047_i2c_write(struct i2c_client *client, int reg, u8 *buf)
{
int ret;
ret = i2c_smbus_write_i2c_block_data(client, reg, 2, buf);
if (ret < 0)
pr_err("%s: err %d, reg: 0x%02x, data: 0x%x%x\n", __func__,
ret, reg, buf[0], buf[1]);
return ret;
}
static void max17047_test_read(struct max17047_fuelgauge_data *fg_data)
{
int reg;
u8 data[2];
int i;
u8 buf[673];
struct timespec ts;
struct rtc_time tm;
pr_info("%s\n", __func__);
getnstimeofday(&ts);
rtc_time_to_tm(ts.tv_sec, &tm);
pr_info("%s: %d/%d/%d %02d:%02d\n", __func__,
tm.tm_mday,
tm.tm_mon + 1,
tm.tm_year + 1900,
tm.tm_hour,
tm.tm_min);
i = 0;
for (reg = 0; reg < 0x50; reg++) {
if (!(reg & 0xf))
i += sprintf(buf + i, "\n%02x| ", reg);
max17047_i2c_read(fg_data->client, reg, data);
i += sprintf(buf + i, "%02x%02x ", data[1], data[0]);
}
for (reg = 0xe0; reg < 0x100; reg++) {
if (!(reg & 0xf))
i += sprintf(buf + i, "\n%02x| ", reg);
max17047_i2c_read(fg_data->client, reg, data);
i += sprintf(buf + i, "%02x%02x ", data[1], data[0]);
}
pr_info(" 0 1 2 3 4 5 6 7");
pr_cont(" 8 9 a b c d e f");
pr_cont("%s\n", buf);
}
static int max17047_get_temperature(struct i2c_client *client)
{
/* If temperature gauging from fuelgauge, implement here */
return 300;
}
/* max17047_get_XXX(); Return current value and update data value */
static int max17047_get_vfocv(struct i2c_client *client)
{
struct max17047_fuelgauge_data *fg_data = i2c_get_clientdata(client);
u8 data[2];
int ret;
u32 vfocv;
pr_debug("%s\n", __func__);
ret = max17047_i2c_read(client, MAX17047_REG_VFOCV, data);
if (ret < 0)
return ret;
vfocv = fg_data->vfocv = ((data[0] >> 3) + (data[1] << 5)) * 625 / 1000;
pr_debug("%s: VFOCV(0x%02x%02x, %d)\n", __func__,
data[1], data[0], vfocv);
return vfocv * 1000;
}
static int max17047_get_vcell(struct i2c_client *client)
{
struct max17047_fuelgauge_data *fg_data = i2c_get_clientdata(client);
u8 data[2];
int ret;
u32 vcell;
pr_debug("%s\n", __func__);
ret = max17047_i2c_read(client, MAX17047_REG_VCELL, data);
if (ret < 0)
return ret;
vcell = fg_data->vcell = ((data[0] >> 3) + (data[1] << 5)) * 625;
pr_debug("%s: VCELL(0x%02x%02x, %d)\n", __func__,
data[1], data[0], vcell);
return vcell;
}
static int max17047_get_avgvcell(struct i2c_client *client)
{
struct max17047_fuelgauge_data *fg_data = i2c_get_clientdata(client);
u8 data[2];
int ret;
u32 avgvcell;
pr_debug("%s\n", __func__);
ret = max17047_i2c_read(client, MAX17047_REG_AVGVCELL, data);
if (ret < 0)
return ret;
avgvcell = fg_data->avgvcell = ((data[0] >> 3) + (data[1] << 5)) * 625;
pr_debug("%s: AVGVCELL(0x%02x%02x, %d)\n", __func__,
data[1], data[0], avgvcell);
return avgvcell;
}
static int max17047_get_rawsoc(struct i2c_client *client)
{
struct max17047_fuelgauge_data *fg_data = i2c_get_clientdata(client);
u8 data[2];
int ret;
int rawsoc;
pr_debug("%s\n", __func__);
ret = max17047_i2c_read(client, MAX17047_REG_SOC_VF, data);
if (ret < 0)
return ret;
rawsoc = fg_data->rawsoc = (data[1] * 100) + (data[0] * 100 / 256);
pr_debug("%s: RAWSOC(0x%02x%02x, %d)\n", __func__,
data[1], data[0], rawsoc);
return rawsoc;
}
static int max17047_get_soc(struct i2c_client *client)
{
struct max17047_fuelgauge_data *fg_data = i2c_get_clientdata(client);
int rawsoc, soc, fullsoc, empty;
pr_debug("%s\n", __func__);
rawsoc = max17047_get_rawsoc(fg_data->client);
#if defined(CONFIG_MACH_C1)
empty = 0;
#else /* M0, T0,,, */
empty = 29;
#endif
if (fg_data->full_soc <= 0)
fg_data->full_soc = FULL_SOC_DEFAULT;
fullsoc = fg_data->full_soc - empty;
rawsoc -= empty;
/* adjust fullsoc value for fast termination */
#if defined(USE_2STEP_TERM) && !defined(CONFIG_TARGET_LOCALE_KOR)
fullsoc *= 99;
fullsoc /= 100;
#endif
soc = fg_data->soc =
((rawsoc < empty) ? 0 : (min((rawsoc * 100 / fullsoc), 100)));
pr_info("%s: SOC(%d, %d / %d)\n", __func__, soc, rawsoc, fullsoc);
return soc;
}
static void max17047_reset_soc(struct i2c_client *client)
{
struct max17047_fuelgauge_data *fg_data =
i2c_get_clientdata(client);
u8 data[2];
pr_info("%s: Before quick-start - "
"VFOCV(%d), VFSOC(%d), SOC(%d)\n", __func__,
max17047_get_vfocv(client),
max17047_get_rawsoc(client),
max17047_get_soc(client));
max17047_test_read(fg_data);
if (max17047_i2c_read(client, MAX17047_REG_MISCCFG, data) < 0)
return;
/* Set bit10 makes quick start */
data[1] |= (0x1 << 2);
max17047_i2c_write(client, MAX17047_REG_MISCCFG, data);
msleep(500);
pr_info("%s: After quick-start - "
"VFOCV(%d), VFSOC(%d), SOC(%d)\n", __func__,
max17047_get_vfocv(client),
max17047_get_rawsoc(client),
max17047_get_soc(client));
max17047_test_read(fg_data);
return;
}
static void max17047_adjust_fullsoc(struct i2c_client *client)
{
struct max17047_fuelgauge_data *fg_data =
i2c_get_clientdata(client);
int prev_full_soc = fg_data->full_soc;
int temp_soc = max17047_get_rawsoc(fg_data->client);
int keep_soc = 0;
if (temp_soc < 0) {
pr_err("%s : fg data error!(%d)\n", __func__, temp_soc);
fg_data->full_soc = FULL_SOC_DEFAULT;
return;
}
if (temp_soc < FULL_SOC_LOW)
fg_data->full_soc = FULL_SOC_LOW;
else if (temp_soc > FULL_SOC_HIGH) {
keep_soc = FULL_SOC_HIGH / 100;
fg_data->full_soc = (FULL_SOC_HIGH - keep_soc);
} else {
keep_soc = temp_soc / 100;
if (temp_soc > (FULL_SOC_LOW + keep_soc))
fg_data->full_soc = temp_soc - keep_soc;
else
fg_data->full_soc = FULL_SOC_LOW;
}
if (prev_full_soc != fg_data->full_soc)
pr_info("%s : p_full_soc(%d), full_soc(%d), keep_soc(%d)\n",
__func__, prev_full_soc, fg_data->full_soc, keep_soc);
}
/* SOC% alert, disabled(0xFF00) */
static void max17047_set_salrt(struct max17047_fuelgauge_data *fg_data,
u8 min, u8 max)
{
struct i2c_client *client = fg_data->client;
u8 i2c_data[2];
pr_info("%s: min(%d%%), max(%d%%)\n", __func__, min, max);
i2c_data[1] = max;
i2c_data[0] = min;
max17047_i2c_write(client, MAX17047_REG_SALRT_TH, i2c_data);
max17047_i2c_read(client, MAX17047_REG_SALRT_TH, i2c_data);
if ((i2c_data[0] != min) || (i2c_data[1] != max))
pr_err("%s: SALRT_TH is not valid (0x%02d%02d ? 0x%02d%02d)\n",
__func__, i2c_data[1], i2c_data[0], max, min);
}
/* Temperature alert, disabled(0x7F80) */
static void max17047_set_talrt(struct max17047_fuelgauge_data *fg_data,
u8 min, u8 max)
{
struct i2c_client *client = fg_data->client;
u8 i2c_data[2];
pr_info("%s: min(0x%02x), max(0x%02x)\n", __func__, min, max);
i2c_data[1] = max;
i2c_data[0] = min;
max17047_i2c_write(client, MAX17047_REG_TALRT_TH, i2c_data);
max17047_i2c_read(client, MAX17047_REG_TALRT_TH, i2c_data);
if ((i2c_data[0] != min) || (i2c_data[1] != max))
pr_err("%s: TALRT_TH is not valid (0x%02d%02d ? 0x%02d%02d)\n",
__func__, i2c_data[1], i2c_data[0], max, min);
}
/* Voltage alert, disabled(0xFF00) */
static void max17047_set_valrt(struct max17047_fuelgauge_data *fg_data,
u8 min, u8 max)
{
struct i2c_client *client = fg_data->client;
u8 i2c_data[2];
pr_info("%s: min(%dmV), max(%dmV)\n", __func__, min * 20, max * 20);
i2c_data[1] = max;
i2c_data[0] = min;
max17047_i2c_write(client, MAX17047_REG_VALRT_TH, i2c_data);
max17047_i2c_read(client, MAX17047_REG_VALRT_TH, i2c_data);
if ((i2c_data[0] != min) || (i2c_data[1] != max))
pr_err("%s: VALRT_TH is not valid (0x%02d%02d ? 0x%02d%02d)\n",
__func__, i2c_data[1], i2c_data[0], max, min);
}
static void max17047_alert_init(struct max17047_fuelgauge_data *fg_data)
{
struct i2c_client *client = fg_data->client;
u8 i2c_data[2];
pr_debug("%s\n", __func__);
/* SALRT Threshold setting */
/* min 1%, max disable */
max17047_set_salrt(fg_data, 0x01, 0xFF);
/* TALRT Threshold setting */
/* min disable, max disable */
max17047_set_talrt(fg_data, 0x80, 0x7F);
/* VALRT Threshold setting */
/* min disable, max disable */
max17047_set_valrt(fg_data, 0x00, 0xFF);
/* Enable SOC alerts */
max17047_i2c_read(client, MAX17047_REG_CONFIG, i2c_data);
i2c_data[0] |= (0x1 << 2);
max17047_i2c_write(client, MAX17047_REG_CONFIG, i2c_data);
}
static void max17047_reg_init(struct max17047_fuelgauge_data *fg_data)
{
struct i2c_client *client = fg_data->client;
u8 i2c_data[2];
pr_debug("%s\n", __func__);
i2c_data[1] = 0x00;
i2c_data[0] = 0x00;
max17047_i2c_write(client, MAX17047_REG_CGAIN, i2c_data);
i2c_data[1] = 0x00;
i2c_data[0] = 0x03;
max17047_i2c_write(client, MAX17047_REG_MISCCFG, i2c_data);
i2c_data[1] = 0x07;
i2c_data[0] = 0x00;
max17047_i2c_write(client, MAX17047_REG_LEARNCFG, i2c_data);
}
static void max17047_update_work(struct work_struct *work)
{
struct max17047_fuelgauge_data *fg_data = container_of(work,
struct max17047_fuelgauge_data,
update_work.work);
struct power_supply *battery_psy;
struct i2c_client *client = fg_data->client;
union power_supply_propval value;
pr_debug("%s\n", __func__);
#ifdef CONFIG_SLP
battery_psy = &fg_data->fuelgauge;
#else
battery_psy = power_supply_get_by_name("battery");
#endif
max17047_get_vcell(client);
max17047_get_vfocv(client);
max17047_get_avgvcell(client);
max17047_get_rawsoc(client);
max17047_get_soc(client);
pr_info("%s: VCELL(%d), VFOCV(%d), AVGVCELL(%d), RAWSOC(%d), SOC(%d)\n",
__func__, fg_data->vcell,
fg_data->vfocv, fg_data->avgvcell,
fg_data->rawsoc, fg_data->soc);
max17047_test_read(fg_data);
if (!battery_psy || !battery_psy->set_property) {
pr_err("%s: fail to get battery power supply\n", __func__);
return;
}
battery_psy->set_property(battery_psy,
POWER_SUPPLY_PROP_STATUS,
&value);
wake_lock_timeout(&fg_data->update_wake_lock, HZ);
}
#ifdef DEBUG_FUELGAUGE_POLLING
static void max17047_polling_work(struct work_struct *work)
{
struct max17047_fuelgauge_data *fg_data = container_of(work,
struct max17047_fuelgauge_data,
polling_work.work);
int reg;
int i;
u8 data[2];
u8 buf[512];
max17047_get_vcell(fg_data->client);
max17047_get_vfocv(fg_data->client);
max17047_get_avgvcell(fg_data->client);
max17047_get_rawsoc(fg_data->client);
max17047_get_soc(fg_data->client);
pr_info("%s: VCELL(%d), VFOCV(%d), AVGVCELL(%d), RAWSOC(%d), SOC(%d)\n",
__func__, fg_data->vcell,
fg_data->vfocv, fg_data->avgvcell,
fg_data->rawsoc, fg_data->soc);
max17047_test_read(fg_data);
schedule_delayed_work(&fg_data->polling_work,
msecs_to_jiffies(MAX17047_POLLING_INTERVAL));
}
#endif
static enum power_supply_property max17047_fuelgauge_props[] = {
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_TEMP,
};
#ifdef USE_TRIM_ERROR_DETECTION
/* Temp: Init max17047 sample has trim value error. For detecting that. */
#define TRIM_ERROR_DETECT_VOLTAGE1 2500000
#define TRIM_ERROR_DETECT_VOLTAGE2 3600000
static bool max17047_detect_trim_error(struct max17047_fuelgauge_data *fg_data)
{
bool ret = false;
int vcell, soc;
vcell = max17047_get_vcell(fg_data->client);
soc = max17047_get_soc(fg_data->client);
if (((vcell < TRIM_ERROR_DETECT_VOLTAGE1) ||
(vcell == TRIM_ERROR_DETECT_VOLTAGE2)) && (soc == 0)) {
pr_err("%s: (maybe)It's a trim error version. "
"VCELL(%d), SOC(%d)\n", __func__, vcell, soc);
ret = true;
}
return ret;
}
#endif
static int max17047_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max17047_fuelgauge_data *fg_data = container_of(psy,
struct max17047_fuelgauge_data,
fuelgauge);
#ifdef USE_TRIM_ERROR_DETECTION
if (fg_data->trim_err == true) {
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
val->intval = 4200000;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = 99;
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = 300;
break;
default:
return -EINVAL;
}
return 0;
}
#endif
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
switch (val->intval) {
case VOLTAGE_TYPE_VCELL:
val->intval = max17047_get_vcell(fg_data->client);
break;
case VOLTAGE_TYPE_VFOCV:
val->intval = max17047_get_vfocv(fg_data->client);
break;
default:
val->intval = max17047_get_vcell(fg_data->client);
break;
}
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
val->intval = max17047_get_avgvcell(fg_data->client);
break;
case POWER_SUPPLY_PROP_CAPACITY:
switch (val->intval) {
case SOC_TYPE_ADJUSTED:
val->intval = max17047_get_soc(fg_data->client);
break;
case SOC_TYPE_RAW:
val->intval = max17047_get_rawsoc(fg_data->client);
break;
case SOC_TYPE_FULL:
val->intval = fg_data->full_soc;
break;
default:
val->intval = max17047_get_soc(fg_data->client);
break;
}
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = max17047_get_temperature(fg_data->client);
break;
default:
return -EINVAL;
}
return 0;
}
static int max17047_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct max17047_fuelgauge_data *fg_data = container_of(psy,
struct max17047_fuelgauge_data,
fuelgauge);
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY:
max17047_reset_soc(fg_data->client);
break;
case POWER_SUPPLY_PROP_STATUS:
if (val->intval != POWER_SUPPLY_STATUS_FULL)
return -EINVAL;
pr_info("%s: charger full state!\n", __func__);
/* adjust full soc */
max17047_adjust_fullsoc(fg_data->client);
break;
default:
return -EINVAL;
}
return 0;
}
static irqreturn_t max17047_fuelgauge_isr(int irq, void *data)
{
struct max17047_fuelgauge_data *fg_data = data;
struct i2c_client *client = fg_data->client;
u8 i2c_data[2];
pr_info("%s: irq(%d)\n", __func__, irq);
mutex_lock(&fg_data->irq_lock);
max17047_i2c_read(client, MAX17047_REG_STATUS, i2c_data);
pr_info("%s: MAX17047_REG_STATUS(0x%02x%02x)\n", __func__,
i2c_data[1], i2c_data[0]);
cancel_delayed_work(&fg_data->update_work);
wake_lock(&fg_data->update_wake_lock);
schedule_delayed_work(&fg_data->update_work, msecs_to_jiffies(1000));
mutex_unlock(&fg_data->irq_lock);
return IRQ_HANDLED;
}
#if defined(CONFIG_TARGET_LOCALE_KOR)
#ifdef CONFIG_DEBUG_FS
static int max17047_debugfs_open(struct inode *inode, struct file *filp)
{
filp->private_data = inode->i_private;
return 0;
}
static ssize_t max17047_debugfs_read_registers(struct file *filp,
char __user *buffer, size_t count, loff_t *ppos)
{
struct max17047_fuelgauge_data *fg_data = filp->private_data;
struct i2c_client *client = NULL;
u8 i2c_data[2];
int reg = 0;
char *buf;
size_t len = 0;
ssize_t ret;
if (!fg_data) {
pr_err("%s : fg_data is null\n", __func__);
return 0;
}
client = fg_data->client;
if (*ppos != 0)
return 0;
if (count < sizeof(buf))
return -ENOSPC;
buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
reg = MAX17047_REG_STATUS;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"status(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
reg = MAX17047_REG_CONFIG;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"config(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
reg = MAX17047_REG_RCOMP;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"rcomp(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
reg = MAX17047_REG_CGAIN;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"cgain(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
reg = MAX17047_REG_SALRT_TH;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"salrt(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
reg = MAX17047_REG_MISCCFG;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"misc(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
reg = 0x39;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"tempc0(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
reg = 0x0F;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"remCap(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
reg = 0x10;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"fullCap(0x%x)=%02x%02x ", reg, i2c_data[1], i2c_data[0]);
len += snprintf(buf + len, PAGE_SIZE - len, "\n");
ret = simple_read_from_buffer(buffer, len, ppos, buf, PAGE_SIZE);
kfree(buf);
return ret;
}
static const struct file_operations max17047_debugfs_fops = {
.owner = THIS_MODULE,
.open = max17047_debugfs_open,
.read = max17047_debugfs_read_registers,
};
static ssize_t max17047_debugfs_read_defaultdata(struct file *filp,
char __user *buffer, size_t count, loff_t *ppos)
{
struct max17047_fuelgauge_data *fg_data = filp->private_data;
struct i2c_client *client = NULL;
u8 i2c_data[2];
int reg = 0;
char *buf;
size_t len = 0;
ssize_t ret;
if (!fg_data) {
pr_err("%s : fg_data is null\n", __func__);
return 0;
}
client = fg_data->client;
if (*ppos != 0)
return 0;
if (count < sizeof(buf))
return -ENOSPC;
buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
reg = MAX17047_REG_RCOMP;
max17047_i2c_read(client, reg, i2c_data);
len += snprintf(buf + len, PAGE_SIZE - len,
"rcomp=%02x%02x ", i2c_data[1], i2c_data[0]);
len += snprintf(buf + len, PAGE_SIZE - len,
"fsoc=%d", fg_data->full_soc);
len += snprintf(buf + len, PAGE_SIZE - len, "\n");
ret = simple_read_from_buffer(buffer, len, ppos, buf, PAGE_SIZE);
kfree(buf);
return ret;
}
static const struct file_operations max17047_debugfs_fops2 = {
.owner = THIS_MODULE,
.open = max17047_debugfs_open,
.read = max17047_debugfs_read_defaultdata,
};
#endif
#endif
static int __devinit max17047_fuelgauge_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct max17047_fuelgauge_data *fg_data;
struct max17047_platform_data *pdata = client->dev.platform_data;
int ret = -ENODEV;
int rawsoc, firstsoc;
pr_info("%s: fuelgauge init\n", __func__);
if (!pdata) {
pr_err("%s: no platform data\n", __func__);
return -ENODEV;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
return -EIO;
fg_data = kzalloc(sizeof(struct max17047_fuelgauge_data), GFP_KERNEL);
if (!fg_data)
return -ENOMEM;
fg_data->client = client;
fg_data->pdata = pdata;
i2c_set_clientdata(client, fg_data);
mutex_init(&fg_data->irq_lock);
wake_lock_init(&fg_data->update_wake_lock, WAKE_LOCK_SUSPEND,
"fuel-update");
#ifdef USE_TRIM_ERROR_DETECTION
/* trim error detect */
fg_data->trim_err = max17047_detect_trim_error(fg_data);
#endif
/* Initialize full_soc, set this before fisrt SOC reading */
fg_data->full_soc = FULL_SOC_DEFAULT;
/* first full_soc update */
rawsoc = max17047_get_rawsoc(fg_data->client);
if (rawsoc > FULL_SOC_DEFAULT)
max17047_adjust_fullsoc(client);
firstsoc = max17047_get_soc(client);
pr_info("%s: rsoc=%d, fsoc=%d, soc=%d\n", __func__,
rawsoc, fg_data->full_soc, firstsoc);
if (fg_data->pdata->psy_name)
fg_data->fuelgauge.name =
fg_data->pdata->psy_name;
else
fg_data->fuelgauge.name = "max17047-fuelgauge";
fg_data->fuelgauge.type = POWER_SUPPLY_TYPE_BATTERY;
fg_data->fuelgauge.properties = max17047_fuelgauge_props;
fg_data->fuelgauge.num_properties =
ARRAY_SIZE(max17047_fuelgauge_props);
fg_data->fuelgauge.get_property = max17047_get_property;
fg_data->fuelgauge.set_property = max17047_set_property;
ret = power_supply_register(&client->dev, &fg_data->fuelgauge);
if (ret) {
pr_err("%s: failed power supply register\n", __func__);
goto err_psy_reg_fg;
}
/* Initialize fuelgauge registers */
max17047_reg_init(fg_data);
/* Initialize fuelgauge alert */
max17047_alert_init(fg_data);
INIT_DELAYED_WORK_DEFERRABLE(&fg_data->update_work,
max17047_update_work);
/* Request IRQ */
fg_data->irq = gpio_to_irq(fg_data->pdata->irq_gpio);
ret = gpio_request(fg_data->pdata->irq_gpio, "fuelgauge-irq");
if (ret) {
pr_err("%s: failed requesting gpio %d\n", __func__,
fg_data->pdata->irq_gpio);
goto err_irq;
}
gpio_direction_input(fg_data->pdata->irq_gpio);
gpio_free(fg_data->pdata->irq_gpio);
ret = request_threaded_irq(fg_data->irq, NULL,
max17047_fuelgauge_isr, IRQF_TRIGGER_FALLING,
"max17047-alert", fg_data);
if (ret < 0) {
pr_err("%s: fail to request max17047 irq: %d: %d\n",
__func__, fg_data->irq, ret);
goto err_irq;
}
ret = enable_irq_wake(fg_data->irq);
if (ret < 0) {
pr_err("%s: failed enable irq wake %d\n", __func__,
fg_data->irq);
goto err_enable_irq;
}
#ifdef DEBUG_FUELGAUGE_POLLING
INIT_DELAYED_WORK_DEFERRABLE(&fg_data->polling_work,
max17047_polling_work);
schedule_delayed_work(&fg_data->polling_work, 0);
#else
max17047_test_read(fg_data);
#endif
pr_info("%s: probe complete\n", __func__);
#if defined(CONFIG_TARGET_LOCALE_KOR)
#ifdef CONFIG_DEBUG_FS
fg_data->fg_debugfs_dir =
debugfs_create_dir("fg_debug", NULL);
if (fg_data->fg_debugfs_dir) {
if (!debugfs_create_file("max17047_regs", 0644,
fg_data->fg_debugfs_dir,
fg_data, &max17047_debugfs_fops))
pr_err("%s : debugfs_create_file, error\n", __func__);
if (!debugfs_create_file("default_data", 0644,
fg_data->fg_debugfs_dir,
fg_data, &max17047_debugfs_fops2))
pr_err("%s : debugfs_create_file2, error\n", __func__);
} else
pr_err("%s : debugfs_create_dir, error\n", __func__);
#endif
#endif
return 0;
err_enable_irq:
free_irq(fg_data->irq, fg_data);
err_irq:
power_supply_unregister(&fg_data->fuelgauge);
err_psy_reg_fg:
wake_lock_destroy(&fg_data->update_wake_lock);
mutex_destroy(&fg_data->irq_lock);
kfree(fg_data);
return ret;
}
static int __devexit max17047_fuelgauge_remove(struct i2c_client *client)
{
struct max17047_fuelgauge_data *fg_data = i2c_get_clientdata(client);
wake_lock_destroy(&fg_data->update_wake_lock);
free_irq(fg_data->irq, fg_data);
power_supply_unregister(&fg_data->fuelgauge);
#ifdef DEBUG_FUELGAUGE_POLLING
cancel_delayed_work(&fg_data->polling_work);
#endif
cancel_delayed_work(&fg_data->update_work);
mutex_destroy(&fg_data->irq_lock);
kfree(fg_data);
return 0;
}
#ifdef CONFIG_PM
static int max17047_fuelgauge_suspend(struct device *dev)
{
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
struct max17047_fuelgauge_data *fg_data = i2c_get_clientdata(client);
struct power_supply *psy = power_supply_get_by_name("battery");
union power_supply_propval value;
int charge_state, voltage_max, voltage_min;
int valrt_vol;
pr_info("%s\n", __func__);
#ifdef DEBUG_FUELGAUGE_POLLING
cancel_delayed_work(&fg_data->polling_work);
#endif
#if !defined(CONFIG_SLP)
/* default disable */
valrt_vol = 0;