--- /dev/null
+/*
+ * BQ27510 battery driver
+ *
+ * This package is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+#include <linux/module.h>
+#include <linux/param.h>
+#include <linux/jiffies.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/idr.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+#include <mach/gpio.h>
+#include <linux/proc_fs.h>
+#include <asm/uaccess.h>
+#include <mach/board.h>
+
+
+#define DRIVER_VERSION "1.1.0"
+#define BQ27x00_REG_TEMP 0x06
+#define BQ27x00_REG_VOLT 0x08
+#define BQ27x00_REG_AI 0x14
+#define BQ27x00_REG_FLAGS 0x0A
+#define BQ27x00_REG_TTE 0x16
+#define BQ27x00_REG_TTF 0x18
+#define BQ27x00_REG_TTECP 0x26
+#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
+#define BQ27500_REG_SOC 0x2c
+
+#define BQ27500_FLAG_DSC BIT(0)
+#define BQ27000_FLAG_CHGS BIT(8)
+#define BQ27500_FLAG_FC BIT(9)
+#define BQ27500_FLAG_OTD BIT(14)
+#define BQ27500_FLAG_OTC BIT(15)
+
+#define BQ27510_SPEED 100 * 1000
+int virtual_battery_enable = 0;
+extern int dwc_vbus_status(void);
+static void bq27541_set(void);
+
+#if 0
+#define DBG(x...) printk(KERN_INFO x)
+#else
+#define DBG(x...) do { } while (0)
+#endif
+
+/* If the system has several batteries we need a different name for each
+ * of them...
+ */
+static DEFINE_MUTEX(battery_mutex);
+
+struct bq27541_device_info {
+ struct device *dev;
+ struct power_supply bat;
+ struct power_supply ac;
+ struct delayed_work work;
+ struct i2c_client *client;
+ unsigned int interval;
+ unsigned int dc_check_pin;
+ unsigned int bat_num;
+};
+
+static struct bq27541_device_info *bq27541_di;
+static enum power_supply_property bq27541_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_HEALTH,
+ //POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+ //POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
+ //POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
+};
+
+static enum power_supply_property rk29_ac_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static ssize_t battery_proc_write(struct file *file,const char __user *buffer,
+ unsigned long count,void *data)
+{
+ char c;
+ int rc;
+ printk("USER:\n");
+ printk("echo x >/proc/driver/power\n");
+ printk("x=1,means just print log ||x=2,means log and data ||x= other,means close log\n");
+
+ rc = get_user(c,buffer);
+ if(rc)
+ return rc;
+ if(c == '1')
+ virtual_battery_enable = 1;
+ else if(c == '2')
+ virtual_battery_enable = 2;
+ else if(c == '3')
+ virtual_battery_enable = 3;
+ else if(c == '9'){
+ printk("%s:%d>>bq27541 set\n",__FUNCTION__,__LINE__);
+ bq27541_set();
+ }
+ else
+ virtual_battery_enable = 0;
+ printk("%s,count(%d),virtual_battery_enable(%d)\n",__FUNCTION__,(int)count,virtual_battery_enable);
+ return count;
+}
+
+static const struct file_operations battery_proc_fops = {
+ .owner = THIS_MODULE,
+ .write = battery_proc_write,
+};
+
+/*
+ * Common code for BQ27510 devices read
+ */
+static int bq27541_read(struct i2c_client *client, u8 reg, u8 buf[], unsigned len)
+{
+ int ret;
+ ret = i2c_master_reg8_recv(client, reg, buf, len, BQ27510_SPEED);
+ return ret;
+}
+
+static int bq27541_write(struct i2c_client *client, u8 reg, u8 const buf[], unsigned len)
+{
+ int ret;
+ ret = i2c_master_reg8_send(client, reg, buf, (int)len, BQ27510_SPEED);
+ return ret;
+}
+
+/*
+ * Return the battery temperature in tenths of degree Celsius
+ * Or < 0 if something fails.
+ */
+static int bq27541_battery_temperature(struct bq27541_device_info *di)
+{
+ int ret;
+ int temp = 0;
+ u8 buf[2] ={0};
+
+ #if defined (CONFIG_NO_BATTERY_IC)
+ return 258;
+ #endif
+
+ if(virtual_battery_enable == 1)
+ return 125/*258*/;
+ ret = bq27541_read(di->client,BQ27x00_REG_TEMP,buf,2);
+ if (ret<0) {
+ dev_err(di->dev, "error reading temperature\n");
+ return ret;
+ }
+ temp = get_unaligned_le16(buf);
+ temp = temp - 2731; //K
+ DBG("Enter:%s %d--temp = %d\n",__FUNCTION__,__LINE__,temp);
+ return temp;
+}
+
+/*
+ * Return the battery Voltage in milivolts
+ * Or < 0 if something fails.
+ */
+static int bq27541_battery_voltage(struct bq27541_device_info *di)
+{
+ int ret;
+ u8 buf[2] = {0};
+ int volt = 0;
+
+ #if defined (CONFIG_NO_BATTERY_IC)
+ return 4000000;
+ #endif
+ if(virtual_battery_enable == 1)
+ return 2000000/*4000000*/;
+
+ ret = bq27541_read(di->client,BQ27x00_REG_VOLT,buf,2);
+ if (ret<0) {
+ dev_err(di->dev, "error reading voltage\n");
+ return ret;
+ }
+ volt = get_unaligned_le16(buf);
+
+ //bp27510 can only measure one li-lion bat
+ if(di->bat_num == 2){
+ volt = volt * 1000 * 2;
+ }else{
+ volt = volt * 1000;
+ }
+
+ DBG("Enter:%s %d--volt = %d\n",__FUNCTION__,__LINE__,volt);
+ return volt;
+}
+
+/*
+ * Return the battery average current
+ * Note that current can be negative signed as well
+ * Or 0 if something fails.
+ */
+static int bq27541_battery_current(struct bq27541_device_info *di)
+{
+ int ret;
+ int curr = 0;
+ u8 buf[2] = {0};
+
+ #if defined (CONFIG_NO_BATTERY_IC)
+ return 22000;
+ #endif
+ if(virtual_battery_enable == 1)
+ return 11000/*22000*/;
+ ret = bq27541_read(di->client,BQ27x00_REG_AI,buf,2);
+ if (ret<0) {
+ dev_err(di->dev, "error reading current\n");
+ return 0;
+ }
+
+ curr = get_unaligned_le16(buf);
+ DBG("curr = %x \n",curr);
+ if(curr>0x8000){
+ curr = 0xFFFF^(curr-1);
+ }
+ curr = curr * 1000;
+ DBG("Enter:%s %d--curr = %d\n",__FUNCTION__,__LINE__,curr);
+ return curr;
+}
+
+/*
+ * Return the battery Relative State-of-Charge
+ * Or < 0 if something fails.
+ */
+static int bq27541_battery_rsoc(struct bq27541_device_info *di)
+{
+ int ret;
+ int rsoc = 0;
+ #if 0
+ int nvcap = 0,facap = 0,remcap=0,fccap=0,full=0,cnt=0;
+ int art = 0, artte = 0, ai = 0, tte = 0, ttf = 0, si = 0;
+ int stte = 0, mli = 0, mltte = 0, ae = 0, ap = 0, ttecp = 0, cc = 0;
+ #endif
+ u8 buf[2];
+
+ #if defined (CONFIG_NO_BATTERY_IC)
+ return 100;
+ #endif
+ if(virtual_battery_enable == 1)
+ return 50/*100*/;
+
+ ret = bq27541_read(di->client,BQ27500_REG_SOC,buf,2);
+ if (ret<0) {
+ dev_err(di->dev, "error reading relative State-of-Charge\n");
+ return ret;
+ }
+ rsoc = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--rsoc = %d\n",__FUNCTION__,__LINE__,rsoc);
+
+ #if defined (CONFIG_NO_BATTERY_IC)
+ rsoc = 100;
+ #endif
+ #if 0 //other register information, for debug use
+ ret = bq27541_read(di->client,0x0c,buf,2); //NominalAvailableCapacity
+ nvcap = get_unaligned_le16(buf);
+ DBG("\nEnter:%s %d--nvcap = %d\n",__FUNCTION__,__LINE__,nvcap);
+ ret = bq27541_read(di->client,0x0e,buf,2); //FullAvailableCapacity
+ facap = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--facap = %d\n",__FUNCTION__,__LINE__,facap);
+ ret = bq27541_read(di->client,0x10,buf,2); //RemainingCapacity
+ remcap = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--remcap = %d\n",__FUNCTION__,__LINE__,remcap);
+ ret = bq27541_read(di->client,0x12,buf,2); //FullChargeCapacity
+ fccap = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--fccap = %d\n",__FUNCTION__,__LINE__,fccap);
+ ret = bq27541_read(di->client,0x3c,buf,2); //DesignCapacity
+ full = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--DesignCapacity = %d\n",__FUNCTION__,__LINE__,full);
+
+ buf[0] = 0x00; //CONTROL_STATUS
+ buf[1] = 0x00;
+ bq27541_write(di->client,0x00,buf,2);
+ ret = bq27541_read(di->client,0x00,buf,2);
+ cnt = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--Control status = %x\n",__FUNCTION__,__LINE__,cnt);
+
+ ret = bq27541_read(di->client,0x02,buf,2); //AtRate
+ art = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--AtRate = %d\n",__FUNCTION__,__LINE__,art);
+ ret = bq27541_read(di->client,0x04,buf,2); //AtRateTimeToEmpty
+ artte = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--AtRateTimeToEmpty = %d\n",__FUNCTION__,__LINE__,artte);
+ ret = bq27541_read(di->client,0x14,buf,2); //AverageCurrent
+ ai = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--AverageCurrent = %d\n",__FUNCTION__,__LINE__,ai);
+ ret = bq27541_read(di->client,0x16,buf,2); //TimeToEmpty
+ tte = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--TimeToEmpty = %d\n",__FUNCTION__,__LINE__,tte);
+ ret = bq27541_read(di->client,0x18,buf,2); //TimeToFull
+ ttf = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--TimeToFull = %d\n",__FUNCTION__,__LINE__,ttf);
+ ret = bq27541_read(di->client,0x1a,buf,2); //StandbyCurrent
+ si = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--StandbyCurrent = %d\n",__FUNCTION__,__LINE__,si);
+ ret = bq27541_read(di->client,0x1c,buf,2); //StandbyTimeToEmpty
+ stte = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--StandbyTimeToEmpty = %d\n",__FUNCTION__,__LINE__,stte);
+ ret = bq27541_read(di->client,0x1e,buf,2); //MaxLoadCurrent
+ mli = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--MaxLoadCurrent = %d\n",__FUNCTION__,__LINE__,mli);
+ ret = bq27541_read(di->client,0x20,buf,2); //MaxLoadTimeToEmpty
+ mltte = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--MaxLoadTimeToEmpty = %d\n",__FUNCTION__,__LINE__,mltte);
+ ret = bq27541_read(di->client,0x22,buf,2); //AvailableEnergy
+ ae = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--AvailableEnergy = %d\n",__FUNCTION__,__LINE__,ae);
+ ret = bq27541_read(di->client,0x24,buf,2); //AveragePower
+ ap = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--AveragePower = %d\n",__FUNCTION__,__LINE__,ap);
+ ret = bq27541_read(di->client,0x26,buf,2); //TTEatConstantPower
+ ttecp = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--TTEatConstantPower = %d\n",__FUNCTION__,__LINE__,ttecp);
+ ret = bq27541_read(di->client,0x2a,buf,2); //CycleCount
+ cc = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--CycleCount = %d\n",__FUNCTION__,__LINE__,cc);
+ #endif
+ return rsoc;
+}
+
+static int bq27541_battery_status(struct bq27541_device_info *di,
+ union power_supply_propval *val)
+{
+ u8 buf[2] = {0};
+ int flags = 0;
+ int status = 0;
+ int ret = 0;
+
+ #if defined (CONFIG_NO_BATTERY_IC)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ return 0;
+ #endif
+
+ if(virtual_battery_enable == 1)
+ {
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ return 0;
+ }
+ ret = bq27541_read(di->client,BQ27x00_REG_FLAGS, buf, 2);
+ if (ret < 0) {
+ dev_err(di->dev, "error reading flags\n");
+ return ret;
+ }
+ flags = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--status = %x\n",__FUNCTION__,__LINE__,flags);
+ if (flags & BQ27500_FLAG_FC)
+ status = POWER_SUPPLY_STATUS_FULL;
+ else if (flags & BQ27500_FLAG_DSC)
+ status = POWER_SUPPLY_STATUS_DISCHARGING;
+ else
+ status = POWER_SUPPLY_STATUS_CHARGING;
+
+ val->intval = status;
+ return 0;
+}
+
+static int bq27541_health_status(struct bq27541_device_info *di,
+ union power_supply_propval *val)
+{
+ u8 buf[2] = {0};
+ int flags = 0;
+ int status;
+ int ret;
+
+ #if defined (CONFIG_NO_BATTERY_IC)
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ return 0;
+ #endif
+
+ if(virtual_battery_enable == 1)
+ {
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ return 0;
+ }
+ ret = bq27541_read(di->client,BQ27x00_REG_FLAGS, buf, 2);
+ if (ret < 0) {
+ dev_err(di->dev, "error reading flags\n");
+ return ret;
+ }
+ flags = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--status = %x\n",__FUNCTION__,__LINE__,flags);
+
+ if ((flags & BQ27500_FLAG_OTD)||(flags & BQ27500_FLAG_OTC))
+ status = POWER_SUPPLY_HEALTH_OVERHEAT;
+ else
+ status = POWER_SUPPLY_HEALTH_GOOD;
+
+
+
+ val->intval = status;
+ return 0;
+}
+
+
+/*
+ * Read a time register.
+ * Return < 0 if something fails.
+ */
+static int bq27541_battery_time(struct bq27541_device_info *di, int reg,
+ union power_supply_propval *val)
+{
+ u8 buf[2] = {0};
+ int tval = 0;
+ int ret;
+
+ ret = bq27541_read(di->client,reg,buf,2);
+ if (ret<0) {
+ dev_err(di->dev, "error reading register %02x\n", reg);
+ return ret;
+ }
+ tval = get_unaligned_le16(buf);
+ DBG("Enter:%s %d--tval=%d\n",__FUNCTION__,__LINE__,tval);
+ if (tval == 65535)
+ return -ENODATA;
+
+ val->intval = tval * 60;
+ DBG("Enter:%s %d val->intval = %d\n",__FUNCTION__,__LINE__,val->intval);
+ return 0;
+}
+
+#define to_bq27541_device_info(x) container_of((x), \
+ struct bq27541_device_info, bat);
+
+static int bq27541_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret = 0;
+ struct bq27541_device_info *di = to_bq27541_device_info(psy);
+ DBG("Enter:%s %d psp= %d\n",__FUNCTION__,__LINE__,psp);
+
+ switch (psp) {
+
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = bq27541_battery_status(di, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = bq27541_battery_voltage(di);
+ if (psp == POWER_SUPPLY_PROP_PRESENT)
+ val->intval = val->intval <= 0 ? 0 : 1;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ val->intval = bq27541_battery_current(di);
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = bq27541_battery_rsoc(di);
+ break;
+
+ case POWER_SUPPLY_PROP_TEMP:
+ val->intval = bq27541_battery_temperature(di);
+ break;
+
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ ret = bq27541_health_status(di, val);
+ break;
+ case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
+ ret = bq27541_battery_time(di, BQ27x00_REG_TTE, val);
+ break;
+ case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
+ ret = bq27541_battery_time(di, BQ27x00_REG_TTECP, val);
+ break;
+ case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
+ ret = bq27541_battery_time(di, BQ27x00_REG_TTF, val);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int rk29_ac_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret = 0;
+ struct bq27541_device_info *di = container_of(psy, struct bq27541_device_info, ac);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ if (psy->type == POWER_SUPPLY_TYPE_MAINS){
+ if(gpio_get_value(di->dc_check_pin))
+ val->intval = 0; /*discharging*/
+ else
+ val->intval = 1; /*charging*/
+ }
+ DBG("%s:%d val->intval = %d\n",__FUNCTION__,__LINE__,val->intval);
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static void bq27541_powersupply_init(struct bq27541_device_info *di)
+{
+ di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
+ di->bat.properties = bq27541_battery_props;
+ di->bat.num_properties = ARRAY_SIZE(bq27541_battery_props);
+ di->bat.get_property = bq27541_battery_get_property;
+
+ di->ac.name = "ac";
+ di->ac.type = POWER_SUPPLY_TYPE_MAINS;
+ di->ac.properties = rk29_ac_props;
+ di->ac.num_properties = ARRAY_SIZE(rk29_ac_props);
+ di->ac.get_property = rk29_ac_get_property;
+}
+
+
+static void bq27541_battery_update_status(struct bq27541_device_info *di)
+{
+ power_supply_changed(&di->bat);
+}
+
+static void bq27541_battery_work(struct work_struct *work)
+{
+ struct bq27541_device_info *di = container_of(work, struct bq27541_device_info, work.work);
+ bq27541_battery_update_status(di);
+ /* reschedule for the next time */
+ schedule_delayed_work(&di->work, di->interval);
+}
+
+static void bq27541_set(void)
+{
+ struct bq27541_device_info *di;
+ int i = 0;
+ u8 buf[2];
+
+ di = bq27541_di;
+ printk("enter 0x41\n");
+ buf[0] = 0x41;
+ buf[1] = 0x00;
+ bq27541_write(di->client,0x00,buf,2);
+
+ msleep(1500);
+
+ printk("enter 0x21\n");
+ buf[0] = 0x21;
+ buf[1] = 0x00;
+ bq27541_write(di->client,0x00,buf,2);
+
+ buf[0] = 0;
+ buf[1] = 0;
+ bq27541_read(di->client,0x00,buf,2);
+
+ // printk("%s: Enter:BUF[0]= 0X%x BUF[1] = 0X%x\n",__FUNCTION__,buf[0],buf[1]);
+
+ while((buf[0] & 0x04)&&(i<5))
+ {
+ printk("enter more 0x21 times i = %d\n",i);
+ mdelay(1000);
+ buf[0] = 0x21;
+ buf[1] = 0x00;
+ bq27541_write(di->client,0x00,buf,2);
+
+ buf[0] = 0;
+ buf[1] = 0;
+ bq27541_read(di->client,0x00,buf,2);
+ i++;
+ }
+
+ if(i>5)
+ printk("write 0x21 error\n");
+ else
+ printk("bq27541 write 0x21 success\n");
+}
+
+static int bq27541_battery_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct bq27541_device_info *di;
+ int retval = 0;
+ struct bq27541_platform_data *pdata;
+
+ DBG("********** bq27541_battery_probe************** ");
+ pdata = client->dev.platform_data;
+
+ di = kzalloc(sizeof(*di), GFP_KERNEL);
+ if (!di) {
+ dev_err(&client->dev, "failed to allocate device info data\n");
+ retval = -ENOMEM;
+ goto batt_failed_2;
+ }
+ i2c_set_clientdata(client, di);
+ di->dev = &client->dev;
+ di->bat.name = "bq27541-battery";
+ di->client = client;
+ /* 4 seconds between monotor runs interval */
+ di->interval = msecs_to_jiffies(4 * 1000);
+
+ di->bat_num = pdata->bat_num;
+ di->dc_check_pin = pdata->dc_check_pin;
+
+ if (pdata->init_dc_check_pin)
+ pdata->init_dc_check_pin( );
+
+ bq27541_powersupply_init(di);
+
+ retval = power_supply_register(&client->dev, &di->bat);
+ if (retval) {
+ dev_err(&client->dev, "failed to register battery\n");
+ goto batt_failed_4;
+ }
+ bq27541_di = di;
+ retval = power_supply_register(&client->dev, &di->ac);
+ if (retval) {
+ dev_err(&client->dev, "failed to register ac\n");
+ goto batt_failed_4;
+ }
+ INIT_DELAYED_WORK(&di->work, bq27541_battery_work);
+ schedule_delayed_work(&di->work, di->interval);
+ dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION);
+ return 0;
+
+batt_failed_4:
+ kfree(di);
+batt_failed_2:
+ return retval;
+}
+
+static int bq27541_battery_remove(struct i2c_client *client)
+{
+ struct bq27541_device_info *di = i2c_get_clientdata(client);
+
+ power_supply_unregister(&di->bat);
+ kfree(di->bat.name);
+ kfree(di);
+ return 0;
+}
+
+static const struct i2c_device_id bq27541_id[] = {
+ { "bq27541", 0 },
+};
+
+static struct i2c_driver bq27541_battery_driver = {
+ .driver = {
+ .name = "bq27541",
+ },
+ .probe = bq27541_battery_probe,
+ .remove = bq27541_battery_remove,
+ .id_table = bq27541_id,
+};
+
+static int __init bq27541_battery_init(void)
+{
+ int ret;
+ struct proc_dir_entry * battery_proc_entry;
+
+ ret = i2c_add_driver(&bq27541_battery_driver);
+ if (ret)
+ printk(KERN_ERR "Unable to register BQ27541 driver\n");
+
+ battery_proc_entry = proc_create("driver/power",0777,NULL,&battery_proc_fops);
+ return ret;
+}
+module_init(bq27541_battery_init);
+
+static void __exit bq27541_battery_exit(void)
+{
+ i2c_del_driver(&bq27541_battery_driver);
+}
+module_exit(bq27541_battery_exit);
+
+MODULE_AUTHOR("clb");
+MODULE_DESCRIPTION("BQ27541 battery monitor driver");
+MODULE_LICENSE("GPL");
projects / firefly-linux-kernel-4.4.55.git / commitdiff