BQ27541-G1: BQ27541:the temperature is error (19286 ) from the temperature register address:0x06

/*
 * BQ27x00 battery driver
 *
 * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it>
 * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>
 * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de>
 * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com>
 *
 * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
 *
 * 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.
 *
 */

/*
 * Datasheets:
 * http://focus.ti.com/docs/prod/folders/print/bq27000.html
 * http://focus.ti.com/docs/prod/folders/print/bq27500.html
 * http://www.ti.com/product/bq27425-g1
 * http://www.ti.com/product/BQ27742-G1
 */

#include <linux/device.h>
#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 <linux/power/bq27x00_battery.h>

/*Bug7815737, Begin , flash not work after change battery from low (less than 10 percent) to high */
#ifdef CONFIG_T2M_PRODUCT_D01
extern struct qpnp_qg *g_qgchip;
extern int qg_write_monotonic_soc_from_bq27x00(struct qpnp_qg *chip, int msoc);
extern int qg_read_monotonic_soc(struct qpnp_qg *chip, u8* msoc);
#endif
/*Bug7815737, End , flash not work after change battery from low (less than 10 percent) to high */
#undef dev_dbg 
/* Modify by jianfeng.ou, disable debug log. [PORION-1606] 2021-02-21 */
/* #undef pr_debug */
#undef dev_info 
#define dev_info dev_err 
#define dev_dbg dev_err 
/* Modify by jianfeng.ou, disable debug log. [PORION-1606] 2021-02-21 */
/* #define pr_debug pr_err */


#define DRIVER_VERSION			"1.2.0"

#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 BQ27x00_REG_NAC			0x0C /* Nominal available capacity */
#define BQ27x00_REG_LMD			0x12 /* Last measured discharge */
#define BQ27x00_REG_CYCT		0x2A /* Cycle count total */
#define BQ27x00_REG_AE			0x22 /* Available energy */
#define BQ27x00_POWER_AVG		0x24

/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
#define BQ27x00_REG_CTRL		0x00
#define BQ27x00_REG_DFCLS		0x3e
#define BQ27x00_DATA_FLASH		0x3f
#define BQ27x00_REG_ADF			0x40
#define BQ27x00_AUTHENCHECKSUM	0x54
#define BQ27x00_REG_DFDCKS		0x60
#define BQ27x00_BLOCK_CTRL		0x61
/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
#define BQ27x00_REG_SOH		    0x2e//add the prop soh by zhaochuang.shao 20200929

#define BQ27000_REG_RSOC		0x0B /* Relative State-of-Charge */
#define BQ27000_REG_ILMD		0x76 /* Initial last measured discharge */
#define BQ27000_FLAG_EDVF		BIT(0) /* Final End-of-Discharge-Voltage flag */
#define BQ27000_FLAG_EDV1		BIT(1) /* First End-of-Discharge-Voltage flag */
#define BQ27000_FLAG_CI			BIT(4) /* Capacity Inaccurate flag */
#define BQ27000_FLAG_FC			BIT(5)
#define BQ27000_FLAG_CHGS		BIT(7) /* Charge state flag */

#define BQ27500_REG_SOC			0x2C
#define BQ27500_REG_DCAP		0x3C /* Design capacity */
#define BQ27500_FLAG_DSC		BIT(0)
#define BQ27500_FLAG_SOCF		BIT(1) /* State-of-Charge threshold final */
#define BQ27500_FLAG_SOC1		BIT(2) /* State-of-Charge threshold 1 */
#define BQ27500_FLAG_FC			BIT(9)
#define BQ27500_FLAG_OTC		BIT(15)

#define BQ27742_POWER_AVG		0x76

/* bq27425 register addresses are same as bq27x00 addresses minus 4 */
#define BQ27425_REG_OFFSET		0x04
#define BQ27425_REG_SOC			0x18 /* Register address plus offset */

#define BQ27000_RS			20 /* Resistor sense */
#define BQ27x00_POWER_CONSTANT		(256 * 29200 / 1000)


#define CONFIG_BATTERY_BQ27X00_I2C


struct bq27x00_device_info;
struct bq27x00_access_methods {
	int (*read)(struct bq27x00_device_info *di, u8 reg, bool single);
	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	int (*write)(struct bq27x00_device_info *di, u8 reg, u8 *data, u8 len);
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
};

enum bq27x00_chip { BQ27000, BQ27500, BQ27425, BQ27742};

struct bq27x00_reg_cache {
	int temperature;
	int time_to_empty;
	int time_to_empty_avg;
	int time_to_full;
	int charge_full;
	int cycle_count;
	int capacity;
	int energy;
	int flags;
	int power_avg;
	int health;
	int remaining_life;//add the prop soh by zhaochuang.shao 20200929
};

struct bq27x00_device_info {
	struct device 		*dev;
	int			id;
	enum bq27x00_chip	chip;

	struct bq27x00_reg_cache cache;
	int charge_design_full;

	unsigned long last_update;
	struct delayed_work work;

	struct power_supply	*bat;
	struct power_supply *smb5_psy;

	struct bq27x00_access_methods bus;

	struct mutex lock;

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	u8 serial_len;
	char serial_no[32];
	bool is_present;
	bool doing_auth;
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
};


static enum power_supply_property bq27x00_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_CAPACITY_LEVEL,
	POWER_SUPPLY_PROP_TEMP,
	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
	POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
	POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_CHARGE_FULL,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	POWER_SUPPLY_PROP_CYCLE_COUNT,
	POWER_SUPPLY_PROP_ENERGY_NOW,
	POWER_SUPPLY_PROP_POWER_AVG,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_SOH,//add the prop soh by zhaochuang.shao 20200929
};


#if 0

static enum power_supply_property bq27425_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_CAPACITY_LEVEL,
	POWER_SUPPLY_PROP_TEMP,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_CHARGE_FULL,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
};

static enum power_supply_property bq27742_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_CAPACITY_LEVEL,
	POWER_SUPPLY_PROP_TEMP,
	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_CHARGE_FULL,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	POWER_SUPPLY_PROP_CYCLE_COUNT,
	POWER_SUPPLY_PROP_POWER_AVG,
	POWER_SUPPLY_PROP_HEALTH,
};
#endif

static unsigned int poll_interval = 360;
module_param(poll_interval, uint, 0644);
MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \
				"0 disables polling");

/*
 * Common code for BQ27x00 devices
 */

static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
		bool single)
{
	if (di->chip == BQ27425)
		return di->bus.read(di, reg - BQ27425_REG_OFFSET, single);
	return di->bus.read(di, reg, single);
}

/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
static inline int bq27xxx_read(struct bq27x00_device_info *di, u8 reg,
		bool single)
{
	return di->bus.read(di, reg, single);
}

static inline int bq27xxx_write(struct bq27x00_device_info *di, u8 reg,
		u8 *data, u8 len)
{
	return di->bus.write(di, reg, data, len);
}

#define BATTERY_CRITICAL_TEMP_HOT (700 + 2731) //if the battery temp up 70 deg,read more times by the i2c for PR:10204940
#define READ_TEMP_DELAY 100 //delay 100ms when the temp error for PR:10204940
#define RETRY_COUNT 5
static int retry_sleep_ms[RETRY_COUNT] = {10, 20, 30, 40, 50};
static int bq27xxx_battery_i2c_read(struct bq27x00_device_info *di, u8 reg,
		bool single)
{
	struct i2c_client *client = to_i2c_client(di->dev);
	struct i2c_msg msg[2];
	unsigned char data[2];
	int ret = 0;
	int retry_count = 0;

	if (!client->adapter)
		return -ENODEV;

	msg[0].addr = client->addr;
	msg[0].flags = 0;
	msg[0].buf = &reg;
	msg[0].len = sizeof(reg);
	msg[1].addr = client->addr;
	msg[1].flags = I2C_M_RD;
	msg[1].buf = data;
	if (single)
		msg[1].len = 1;
	else
		msg[1].len = 2;

	if (ret < 0)
		return ret;
read_retry:
	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));

	if(ret < 0)
	{
		if(retry_count < RETRY_COUNT){
			/* sleep for few ms before retrying */
			msleep(retry_sleep_ms[retry_count++]);
			goto read_retry;
		} else {
			return ret;
		}
	}

	if (!single)
		ret = get_unaligned_le16(data);
	else
		ret = data[0];

	return ret;
}

static int bq27xxx_battery_i2c_write(struct bq27x00_device_info *di, u8 reg, u8 *data, u8 len)
{
	struct i2c_client *client = to_i2c_client(di->dev);
	int i;
	int ret = 0;
	int retry_count = 0;

	for(i=0;i < len;i++)
	{
		retry_count  = 0;
retry:
		ret = i2c_smbus_write_byte_data(client, reg+i, data[i]);

		if(ret != 0)
		{
			if(retry_count < RETRY_COUNT){
				/* sleep for few ms before retrying */
				printk("%s :retry_count=%d.\n",__func__, retry_count);
				msleep(retry_sleep_ms[retry_count++]);
				goto retry;
			} else {
				printk("%s write reg=%x,data=%x, fail \n",__func__, reg+i,data[i]);
				return -1;
			}
		}
	}

	return ret;
}

static int bq27xxx_read_block_data (struct bq27x00_device_info *di, u8 reg, u8 *data,u8 len)
{
	int i;
	int ret;

	for(i=0;i < len;i++){
		ret = bq27xxx_battery_i2c_read(di, reg+i, true);
		if(ret < 0){
			dev_err(di->dev, "Failed to read\n");
			return -1;
		} else{
			data[i] = (u8)ret;
		}

	}
	return 0;
}

static int bq27541_i2c_txsubcmd(struct bq27x00_device_info *di, u8 reg, unsigned short subcmd)
{
	struct i2c_msg msg;
	unsigned char data[3];
	int ret;
	struct i2c_client *client = to_i2c_client(di->dev);
	if (!client)
		return -ENODEV;

	memset(data, 0, sizeof(data));
	data[0] = reg;
	data[1] = subcmd & 0x00FF;
	data[2] = (subcmd & 0xFF00) >> 8;

	msg.addr = client->addr;
	msg.flags = 0;
	msg.len = 3;
	msg.buf = data;

	ret = i2c_transfer(client->adapter, &msg, 1);
	if (ret < 0)
		return -EIO;

	return 0;
}

static void bq27541_cntl_cmd(struct bq27x00_device_info *di, int subcmd)
{
	bq27541_i2c_txsubcmd(di, BQ27x00_REG_CTRL, subcmd);
}

#define CONTROL_STATUS			0x00
#define MESSAGE_LEN				20
#define KEY_LEN					16
#define UNSEAL_KEY_LEN			4

static u8 recv_buf[MESSAGE_LEN]={0x0};
static u8 chellange_buf[MESSAGE_LEN]={0x2a, 0x04, 0x77, 0x72, 0x72, 0x1e, 0x89, 0xf5, 0x03, 0x16, 0x62, 0xae, 0x40, 0x80, 0xd4, 0x9e, 0xb6, 0x67, 0xae};

static bool is_sealed(struct bq27x00_device_info *di)
{
	int value = 0;

	bq27541_cntl_cmd(di, CONTROL_STATUS);
	msleep(1);
	value = bq27xxx_read(di, BQ27x00_REG_CTRL,false);
	pr_debug("%s REG_CNTL: 0x%x\n", __func__, value);

	return !!(value & BIT(13));
}

#ifdef GAUGE_ROM_DEBUG

#define DEVICE_TYPE					0x01
#define BQ27541_RESET_SUBCMD		0x0041
#define SEAL_SUBCMD					0x0020
#define SEAL_POLLING_RETRY_LIMIT	10

static u32 unseal_key = 0x20180101;
//static u32 unseal_key = 0x36720414;	/* default key */
static u8 new_auth_key[KEY_LEN]={0x77,0x30,0xa1,0x28,0x0a,0xa1,0x13,0x20,0xef,0xcd,0xab,0x89,0x67,0x45,0x23,0x01};
static u8 default_auth_key[KEY_LEN]={0x10,0x32,0x54,0x76,0x98,0xba,0xdc,0xfe,0xef,0xcd,0xab,0x01,0x01,0x01,0x18,0x20};

static int seal(struct bq27x00_device_info *di)
{
	int i = 0;

	if(is_sealed(di)){
		pr_err("bq27541 sealed,return\n");
		return 0;
	}
	bq27541_cntl_cmd(di, SEAL_SUBCMD);
	msleep(1);
	for(i = 0;i < SEAL_POLLING_RETRY_LIMIT;i++){
		if(is_sealed(di))
			return 0;
		msleep(1);
	}
	pr_err( "bq27541 seal fail !\n");
	return -1;
}

static int unseal(struct bq27x00_device_info *di, u32 key)
{
	int i = 0;

		if (!is_sealed(di)){
			pr_err("chip is unsealed.\n");
			return 0;
		}

	for(i = 0; i < SEAL_POLLING_RETRY_LIMIT;i++){
		bq27541_cntl_cmd(di, key&0x0000FFFF);
		msleep(1);
		bq27541_cntl_cmd(di, (key>>16)&0x0000FFFF);
		msleep(1);

		bq27541_cntl_cmd(di, 0xffff);
		msleep(1);
		bq27541_cntl_cmd(di, 0xffff);
		msleep(1);

		if (!is_sealed(di)){
			pr_err("unsealed successful.\n");
			return 0;
		}
	}
	pr_err( "bq27541 unseal fail !\n");
	return -1;
}

static int bq27541_reset(struct bq27x00_device_info *di)
{
	int value;
	int ret = 0;

	ret = unseal(di, unseal_key);
	if(ret < 0){
		return ret;
	}

	bq27541_cntl_cmd(di, BQ27541_RESET_SUBCMD);
	msleep(1);
	value = bq27xxx_read(di, BQ27x00_REG_CTRL,false);

	printk(KERN_ERR "bq27541 CONTROL_STATUS: 0x%x\n", value);
	ret = seal(di);
	if (ret < 0){
		return ret;
	}

	return ret;
}

static int bq27541_rw_blockdata(struct bq27x00_device_info *di, u8 subcmd, int offset)
{
    int ret;
	u8 temp;

	temp = subcmd;
	ret = bq27xxx_write(di, BQ27x00_REG_DFCLS, &temp,1);
	temp = offset / 32;
	ret = bq27xxx_write(di, BQ27x00_DATA_FLASH,&temp ,1);
	temp = 0;
	ret = bq27xxx_write(di, BQ27x00_BLOCK_CTRL,&temp,1);
	return ret;
}

__maybe_unused static int bq27541_battery_set_auth_key(struct bq27x00_device_info *di, bool default_key)
{
	int ret;
	char authen_cmd_buf = 0;
	char block_data_buf[32] = {0x00};
	u8 sum,i;

	//step 1, unseal the fuel gauge
	ret = unseal(di, unseal_key);
	if (ret < 0)
		return ret;
	//step 2, send Authentication() command

	//step 3, enable the authentication data commands
	ret = bq27xxx_write(di,BQ27x00_BLOCK_CTRL,&authen_cmd_buf,1);
	if (ret < 0)
		return ret;
	//step 4, set security class
	bq27541_rw_blockdata(di,0x70,0);

	//step 5, read 32 bytes from BlockData
	bq27xxx_read_block_data(di,BQ27x00_REG_ADF,block_data_buf,32);

	// MODIFY-BEGIN by jianfeng.ou, set debug unseal key to 20180101, ALM9030830 2020-03-20
	for (i = 0; i < UNSEAL_KEY_LEN; i++) {
		block_data_buf[UNSEAL_KEY_LEN - i - 1] = (unseal_key >> (8 * i)) & 0x000000ff;
	}
	// MODIFY-END by jianfeng.ou, set debug unseal key to 20180101, ALM9030830 2020-03-20

	for(i=0;i< KEY_LEN;i++){
		if(default_key)
			block_data_buf[8+i] = default_auth_key[KEY_LEN-i-1];
		else
			block_data_buf[8+i] = new_auth_key[KEY_LEN-i-1];
	}

	for(i = 0;i < 32;i++){
		pr_info("AUTHENDATA[%02d]:0x%02x\n",i,block_data_buf[i]);
	}

	//step 7, write new key back
	bq27xxx_write(di, BQ27x00_REG_ADF, block_data_buf, 32);

	//step 8, write checksum
	sum = 0;
	for (i=0; i<32; i++) {
		sum += block_data_buf[i];
	}
	sum = 0xff - sum;

	msleep(50);

	bq27xxx_write(di, BQ27x00_REG_DFDCKS, &sum,1);

	msleep(200);

	bq27541_rw_blockdata(di,0x70,0);
	bq27xxx_read_block_data(di,BQ27x00_REG_ADF,block_data_buf,32);

	for(i = 0;i < 32;i++){
		pr_info("BQ27XXX_AUTHENDATA[%02d]:0x%02x\n",i,block_data_buf[i]);
	}

	//step 9, seal the fuel gauge
	ret = seal(di);
	if (ret < 0)
		return ret;
	return 0;
}

__maybe_unused static int bq27541_device_type(struct bq27x00_device_info *di)
{
	int value = 0;

	bq27541_cntl_cmd(di,DEVICE_TYPE);
	msleep(1);
	value = bq27xxx_read(di, BQ27x00_REG_CTRL,false);
	pr_err("%s DEVICE_TYPE: 0x%x\n", __func__, value);

	return value;
}
#endif /* GAUGE_ROM_DEBUG */

u8 a2x(const char c)
{
	switch(c) {
	case '0'...'9':
		return c-'0';
	case 'a'...'f':
		return 0xa + (c-'a');
	case 'A'...'F':
		return 0xa + (c-'A');
	default:
		goto error;
	}
error:
	printk("error %d",c);
	return -1;
}

void strtohex(u8 *dst_str, const u8 *src_str)
{
	u8 i;
	for(i = 0; i < MESSAGE_LEN; i++) {
		dst_str[i] = (a2x(src_str[i*2]) << 4)|a2x(src_str[i*2 + 1]);
	}
	return;
}

#define MFG_BLOCK_SIZE 32
#define MODEL_SIZE	10

// Access Manufacturer Info Block A
static int set_mfg_block_a(struct bq27x00_device_info *di, int sealed)
{
	u8 block = 1;
	u8 temp;
	int dfd_cntl_status = 0;

	if (sealed) {
		//when sealed , 1 : bloack A  2: block B
		block = 1;
	} else {
		dfd_cntl_status = bq27xxx_read(di, BQ27x00_BLOCK_CTRL, true);
		if (dfd_cntl_status != 0) {
			temp = 0;
			bq27xxx_write(di,BQ27x00_BLOCK_CTRL,&temp,1);
		}

		temp = 58;
		bq27xxx_write(di, BQ27x00_REG_DFCLS, &temp,1);
		// when unsealed , 0 : bloack A  1: block B
		block = 0;
	}

	bq27xxx_write(di, BQ27x00_DATA_FLASH, &block ,1);
	msleep(1);
	return 0;
}

static bool bq27541_battery_read_serial(struct bq27x00_device_info *di)
{
	int data;
	u8 sum = 0;
	int sealed = 0;
	int i;
	char sn[MFG_BLOCK_SIZE];


	sealed = is_sealed(di);
	set_mfg_block_a(di, sealed);

	memset(di->serial_no, 0, MFG_BLOCK_SIZE);
	bq27xxx_read_block_data(di,BQ27x00_REG_ADF,sn,MFG_BLOCK_SIZE);
	di->serial_len = sn[0];

	/* [BEGIN] modify by jianfeng.ou for ALM8972958. 20200302 */
	if (di->serial_len <= 0 || di->serial_len > MFG_BLOCK_SIZE - 1) {
		dev_err(di->dev, "serial_len %d is not valid\n", di->serial_len);
		return false;
	}
	/* [END] modify by jianfeng.ou for ALM8972958. 20200302 */

	for (i = 0; i < MFG_BLOCK_SIZE; i++) {
		sum += sn[i];
	}

	data = bq27xxx_read(di, BQ27x00_REG_DFDCKS,true);
	sum += data;
	if (sum != 0xFF) {
		dev_err(di->dev, "check-sum 0x%x error\n", sum);
		return false;
	}

	/* [BEGIN] modify by jianfeng.ou for ALM8972958. Separate MODEL and SN. 20200302 */
	if(di->serial_len < 15 )
	{//added by zhaochuang.shao because the PVT battery sn changed 20201013,ALM9500604
		memcpy(di->serial_no, &sn[1], sn[0]);
		di->serial_no[di->serial_len] = 0x0a;
	}else{
		memcpy(di->serial_no, &sn[MODEL_SIZE + 1], sn[0] - MODEL_SIZE);
		di->serial_no[di->serial_len - MODEL_SIZE] = 0x0a;
	/* [END] modify by jianfeng.ou for ALM8972958. 20200302 */
	}
	return true;
}

static int bq27541_battery_write_serial(struct bq27x00_device_info *di, const char* serial_no)
{
	u8 sum = 0;
	int sealed = 0;
	int serial_len = strlen(serial_no);
	u8 buf_w[MFG_BLOCK_SIZE];
	u8 buf_r[MFG_BLOCK_SIZE];
	int i;

	if (serial_len && serial_no[serial_len-1] == 0x0a) {
		serial_len = serial_len - 1;
	}

	if (serial_len <= 0 || serial_len > 20) {
		dev_err(di->dev, "serial_len %d is not valid\n", serial_len);
		return -1;
	}

	sealed = is_sealed(di);
	set_mfg_block_a(di, sealed);

	// prepare data
	memset(buf_w, 0, MFG_BLOCK_SIZE);
	buf_w[0] = serial_len;
	memcpy(&buf_w[1], serial_no, serial_len);
	dev_info(di->dev, "Write serial [%s] to battery\n", &buf_w[1]);

	// write it to battery
	bq27xxx_write(di, BQ27x00_REG_ADF, buf_w, MFG_BLOCK_SIZE);
	for (i = 0; i < MFG_BLOCK_SIZE; i++) {
		sum += buf_w[i];
	}
	sum = 0xff - sum;

	// read it back
	memset(buf_r, 0, MFG_BLOCK_SIZE);
	bq27xxx_read_block_data(di,BQ27x00_REG_ADF,buf_r,MFG_BLOCK_SIZE);
	dev_info(di->dev, "read serial [%s] from battery\n", buf_r);

	// check it
	if(memcmp(buf_w, buf_r, sizeof(buf_w))) {
		dev_err(di->dev, "Verification failed\n");
		return -1;
	}
	// write check-sum to battery
	dev_info(di->dev, "Check-sum=0x%x\n", sum);
	bq27xxx_write(di, BQ27x00_REG_DFDCKS, &sum ,1);
	msleep(200);

	return serial_len;
}

static ssize_t authentication_store(struct device *dev,  struct device_attribute *attr, const char *buf,  size_t count)
{
	struct power_supply *psy = dev_get_drvdata(dev);
	struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
	int rc,i;
	u8 checksum_buf = 0;
	u8 authen_cmd_buf = 0;
	int sealed;
	pr_info("%s:sizeof(buf) = %d, %s.\n",__func__,(int)strlen(buf),buf);

	//transfer string to array
	strtohex(chellange_buf,buf);

	pm_stay_awake(di->dev);
	cancel_delayed_work_sync(&di->work);
	di->doing_auth = true;

	for(i = 0;i < MESSAGE_LEN;i++){
		checksum_buf += chellange_buf[i];
	}
	checksum_buf = 0xff - (checksum_buf&0xff);

	for(i=0;i<5;i++){
		sealed = is_sealed(di);
		pr_debug("%s sealed = %d \n",__func__,sealed);
		if(!sealed){
			// step 1: unseal mode->write 0x01 to blockdatactrl
			authen_cmd_buf = 0x01;
			rc = bq27xxx_write(di,BQ27x00_BLOCK_CTRL,&authen_cmd_buf,1);
		} else {
			// step 1: seal mode->write 0x00 to dataflashblock
			rc = bq27xxx_write(di,BQ27x00_DATA_FLASH,&authen_cmd_buf,1);
		}

		if( rc < 0 ){
			pr_info("%s write authen_cmd_buf  error\n",__func__);
			continue;
		}

		msleep(10);

		// step 2: write 20 bytes to authendata_reg
		rc = bq27xxx_write(di, BQ27x00_REG_ADF, chellange_buf, MESSAGE_LEN);
		if(rc < 0){
			pr_info("%s write chellange_buf error\n",__func__);
			continue;
		}
		msleep(10);

		// step 3: write checksum to authenchecksum_reg for compute
		rc = bq27xxx_write(di,BQ27x00_AUTHENCHECKSUM,&checksum_buf,1);
		if(rc < 0){
			pr_info("%s write checksum_buf = %d, error (%d)\n",__func__,checksum_buf,i);
			msleep(2);
			continue;
		}

		msleep(100);
		memset(recv_buf, 0, MESSAGE_LEN);

		// step 4: read Digest data
		rc = bq27xxx_read_block_data(di,BQ27x00_REG_ADF,recv_buf,MESSAGE_LEN);
		if((recv_buf[MESSAGE_LEN-1] == chellange_buf[MESSAGE_LEN-1]) &&
			(recv_buf[MESSAGE_LEN-2] == chellange_buf[MESSAGE_LEN-2]) &&
			(recv_buf[MESSAGE_LEN-3] == chellange_buf[MESSAGE_LEN-3])){
			pr_info("%s : read invalid digist string. \n",__func__);
			continue;
		} else {
			break;  //exit loop
		}
	}

    return count;
}

static ssize_t authentication_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct power_supply *psy = dev_get_drvdata(dev);
	struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
	int i;
	ssize_t ret;

	di->doing_auth = false;
	schedule_delayed_work(&di->work, HZ); //update battery info 1 second later after finished authentication.
	pm_relax(di->dev);

	for(i = 0; i < MESSAGE_LEN; i++) {
		ret = sprintf(buf, "%s%02x",buf,recv_buf[i]);
	}
	ret = sprintf(buf, "%s\n",buf);

	memset(recv_buf, 0, MESSAGE_LEN);

	return ret;
}

__maybe_unused static ssize_t serial_no_store(struct device *dev,  struct device_attribute *attr,
		const char *buf,  size_t count)
{
	struct power_supply *psy = dev_get_drvdata(dev);
	struct bq27x00_device_info *di = power_supply_get_drvdata(psy);

	if (!di->is_present)
		return -1;

	di->serial_len = bq27541_battery_write_serial(di, buf);
	dev_info(di->dev, "Serial=%s\n", di->serial_len ? di->serial_no : "unknown");

	return count;
}

static ssize_t serial_no_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct power_supply *psy = dev_get_drvdata(dev);
	struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
	int i;

	if (!di->is_present)
		return sprintf(buf,"Unknown\n");

	for(i=0;i<5;i++){
		if(bq27541_battery_read_serial(di))
			goto serial_no_out;
	}

serial_no_out:
	return sprintf(buf, "%s", di->serial_len ? di->serial_no : "unknown\n");
}

#ifdef GAUGE_ROM_DEBUG
static ssize_t reset_store(struct device *dev,  struct device_attribute *attr, const char *buf,  size_t count)
{
	struct power_supply *psy = dev_get_drvdata(dev);
	struct bq27x00_device_info *di = power_supply_get_drvdata(psy);

	int ret;
	if (!di->is_present)
		return -1;

	ret = bq27541_reset(di);
	if(ret < 0){
		dev_info(dev, "[%s] failed to reset fuel gauge.\n",__func__);
	}

	return count;
}

static ssize_t set_auth_key_store(struct device *dev,  struct device_attribute *attr, const char *buf,  size_t count)
{
	struct power_supply *psy = dev_get_drvdata(dev);
	struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
	bool default_key;
	int ret;
	if (!di->is_present)
		return -1;

	ret = kstrtobool(buf, &default_key);
	if (ret){
		dev_info(dev, "[%s] failed to get input parameters.\n",__func__);
		return ret;
	}

	dev_info(dev, "[%s] default_key = %d.\n",__func__,default_key);

	ret = bq27541_battery_set_auth_key(di,default_key);
	if(ret < 0){
		dev_info(dev, "[%s] failed to set key.\n",__func__);
	}

	return count;
}
#endif /* GAUGE_ROM_DEBUG */

static struct device_attribute bq27541_battery_attrs[] = {
	__ATTR_RW(authentication),
#ifdef GAUGE_ROM_DEBUG
	__ATTR_RW(serial_no),
	__ATTR_WO(reset),
	__ATTR_WO(set_auth_key),
#else
	__ATTR_RO(serial_no),
#endif
};

static int bq27541_create_attrs(struct device *dev)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(bq27541_battery_attrs); i++)
		if (device_create_file(dev, &bq27541_battery_attrs[i]))
			goto bq27541_create_attrs_failed;

	return 0;

bq27541_create_attrs_failed:
	dev_err(dev, "failed creating bq27541 battery attrs.\n");
	while (i--)
		device_remove_file(dev, &bq27541_battery_attrs[i]);

	return -EIO;
}
/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */

/*
 * Higher versions of the chip like BQ27425 and BQ27500
 * differ from BQ27000 and BQ27200 in calculation of certain
 * parameters. Hence we need to check for the chip type.
 */
static bool bq27xxx_is_chip_version_higher(struct bq27x00_device_info *di)
{
	if (di->chip == BQ27425 || di->chip == BQ27500 || di->chip == BQ27742)
		return true;
	return false;
}

/*
 * Return the battery Relative State-of-Charge
 * Or < 0 if something fails.
 */
static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di)
{
	int rsoc;

	if (di->chip == BQ27500 || di->chip == BQ27742)
		rsoc = bq27x00_read(di, BQ27500_REG_SOC, false);
	else if (di->chip == BQ27425)
		rsoc = bq27x00_read(di, BQ27425_REG_SOC, false);
	else
		rsoc = bq27x00_read(di, BQ27000_REG_RSOC, true);

	if (rsoc < 0)
		dev_dbg(di->dev, "error reading relative State-of-Charge\n");

	return rsoc;
}

/*
 * Return a battery charge value in µAh
 * Or < 0 if something fails.
 */
static int bq27x00_battery_read_charge(struct bq27x00_device_info *di, u8 reg)
{
	int charge;

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	static int last_charge = 0;

	if(di->doing_auth)
		return last_charge;
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */

	charge = bq27x00_read(di, reg, false);
	if (charge < 0) {
		dev_dbg(di->dev, "error reading charge register %02x: %d\n",
			reg, charge);
		return charge;
	}

	if (bq27xxx_is_chip_version_higher(di))
		charge *= 1000;
	else
		charge = charge * 3570 / BQ27000_RS;

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	last_charge = charge;
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */

	return charge;
}

/*
 * Return the battery Nominal available capaciy in µAh
 * Or < 0 if something fails.
 */
static inline int bq27x00_battery_read_nac(struct bq27x00_device_info *di)
{
	int flags;
	bool is_bq27500 = di->chip == BQ27500;
	bool is_bq27742 = di->chip == BQ27742;
	bool is_higher = bq27xxx_is_chip_version_higher(di);
	bool flags_1b = !(is_bq27500 || is_bq27742);

	flags = bq27x00_read(di, BQ27x00_REG_FLAGS, flags_1b);
	if (flags >= 0 && !is_higher && (flags & BQ27000_FLAG_CI))
		return -ENODATA;

	return bq27x00_battery_read_charge(di, BQ27x00_REG_NAC);
}

/*
 * Return the battery Last measured discharge in µAh
 * Or < 0 if something fails.
 */
static inline int bq27x00_battery_read_lmd(struct bq27x00_device_info *di)
{
	return bq27x00_battery_read_charge(di, BQ27x00_REG_LMD);
}

/*
 * Return the battery Initial last measured discharge in µAh
 * Or < 0 if something fails.
 */
static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
{
	int ilmd;

	if (bq27xxx_is_chip_version_higher(di))
		ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false);
	else
		ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true);

	if (ilmd < 0) {
		dev_dbg(di->dev, "error reading initial last measured discharge\n");
		return ilmd;
	}

	if (bq27xxx_is_chip_version_higher(di))
		ilmd *= 1000;
	else
		ilmd = ilmd * 256 * 3570 / BQ27000_RS;

	return ilmd;
}

/*
 * Return the battery Available energy in µWh
 * Or < 0 if something fails.
 */
static int bq27x00_battery_read_energy(struct bq27x00_device_info *di)
{
	int ae;

	ae = bq27x00_read(di, BQ27x00_REG_AE, false);
	if (ae < 0) {
		dev_dbg(di->dev, "error reading available energy\n");
		return ae;
	}

	if (di->chip == BQ27500)
		ae *= 1000;
	else
		ae = ae * 29200 / BQ27000_RS;

	return ae;
}

/*
 * Return the battery temperature in tenths of degree Kelvin
 * Or < 0 if something fails.
 */
static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di)
{
	int temp,ilmd = 0;
	int i,read_count;
        static int last_temp = 0;
        static int temp_hot_count = 0;

	//printk("capacity = %d\n",bq27x00_read(di, BQ27500_REG_DCAP, false));

	//printk("temp = %d,read_temp = %d,read_count = %d\n",temp,bq27x00_read(di, BQ27x00_REG_TEMP, false));

	temp = bq27x00_read(di, BQ27x00_REG_TEMP, false);
	if (temp < 0) {
		dev_err(di->dev, "error reading temperature\n");
		return temp;
	}

	if (!bq27xxx_is_chip_version_higher(di))
		temp = 5 * temp / 2;

//[BEGIN]:added by zhaochuang.shao for the temp error 160 degreen sometime 20210226,PR:10204940
	if(temp >= BATTERY_CRITICAL_TEMP_HOT ){
			for(i = 0;i < 2;i++){
				pr_err("%s:temp = %d,ilmd = %d,i = %d\n",__func__,temp,ilmd,i);

				for(read_count = 0;read_count < 5;read_count++)
					printk("%s:temp = %d,read_count = %d\n",__func__,bq27x00_read(di, BQ27x00_REG_TEMP, false),read_count);

				printk("%s:capacity = %d\n",__func__,bq27x00_read(di, BQ27500_REG_DCAP, false));

				for(read_count = 0;read_count < 5;read_count++)
					printk("%s:temp = %d,read_count = %d\n",__func__,bq27x00_read(di, BQ27x00_REG_TEMP, false),read_count);

				mdelay(READ_TEMP_DELAY);

				temp = bq27x00_read(di, BQ27x00_REG_TEMP, false);
				if (temp < 0) {
					dev_err(di->dev, "error reading temperature\n");
					return temp;
				}

				if (!bq27xxx_is_chip_version_higher(di))
					temp = 5 * temp / 2;
				ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false);

				//if(temp < BATTERY_CRITICAL_TEMP_HOT)
					//break;
			}
	}

	if(temp >= BATTERY_CRITICAL_TEMP_HOT){
		pr_err("%s:last_temp_count = %d,temp = %d,last_temp = %d\n",__func__,temp_hot_count,temp,last_temp);
		if(++temp_hot_count <= 3) //just recheck for 3 times,if it is still hot,we will report 
			temp = last_temp;
	}
	else{
		temp_hot_count = 0;
	}

	last_temp = temp;
//[END]:by zhaochuang.shao 20210226

	return temp;
}
//[BEGIN]:add the prop soh by zhaochuang.shao 20200929
static int bq27x00_battery_read_remaining_life(struct bq27x00_device_info *di)
{
	int remaining_life = 0;

	remaining_life = bq27x00_read(di, BQ27x00_REG_SOH, false);
	if ((remaining_life < 0) || (remaining_life > 100))
		dev_err(di->dev, "error reading remaining_life\n");
	//pr_err("--bq27x00_battery_read_remaining_life,  remaining_life=%d--\n",remaining_life);

	return remaining_life;
}
//[END]:by zhaochuang.shao 20200929
/*
 * Return the battery Cycle count total
 * Or < 0 if something fails.
 */
static int bq27x00_battery_read_cyct(struct bq27x00_device_info *di)
{
	int cyct;

	cyct = bq27x00_read(di, BQ27x00_REG_CYCT, false);
	if (cyct < 0)
		dev_err(di->dev, "error reading cycle count total\n");

	return cyct;
}

/*
 * Read a time register.
 * Return < 0 if something fails.
 */
static int bq27x00_battery_read_time(struct bq27x00_device_info *di, u8 reg)
{
	int tval;

	tval = bq27x00_read(di, reg, false);
	if (tval < 0) {
		dev_dbg(di->dev, "error reading time register %02x: %d\n",
			reg, tval);
		return tval;
	}

	if (tval == 65535)
		return -ENODATA;

	return tval * 60;
}

/*
 * Read a power avg register.
 * Return < 0 if something fails.
 */
static int bq27x00_battery_read_pwr_avg(struct bq27x00_device_info *di, u8 reg)
{
	int tval;

	tval = bq27x00_read(di, reg, false);
	if (tval < 0) {
		dev_err(di->dev, "error reading power avg rgister  %02x: %d\n",
			reg, tval);
		return tval;
	}

	if (di->chip == BQ27500)
		return tval;
	else
		return (tval * BQ27x00_POWER_CONSTANT) / BQ27000_RS;
}

/*
 * Read flag register.
 * Return < 0 if something fails.
 */
static int bq27x00_battery_read_health(struct bq27x00_device_info *di)
{
	int tval;

	tval = bq27x00_read(di, BQ27x00_REG_FLAGS, false);
	if (tval < 0) {
		dev_err(di->dev, "error reading flag register:%d\n", tval);
		return tval;
	}
	//pr_debug("zxz----bq27x00_battery_read_health--11--di->chip=%d--tval=%x-\n",di->chip,tval);

	if (di->chip == BQ27500) {
		if (tval & BQ27500_FLAG_SOCF)
			tval = POWER_SUPPLY_HEALTH_DEAD;
		else if (tval & BQ27500_FLAG_OTC)
			tval = POWER_SUPPLY_HEALTH_OVERHEAT;
		else
			tval = POWER_SUPPLY_HEALTH_GOOD;
		
		//pr_debug("zxz----bq27x00_battery_read_health--22--tval=%d---\n",tval);
		return tval;
	} else {
		if (tval & BQ27000_FLAG_EDV1)
			tval = POWER_SUPPLY_HEALTH_DEAD;
		else
			tval = POWER_SUPPLY_HEALTH_GOOD;
		
		//pr_err("zxz----bq27x00_battery_read_health--33--tval=%d---\n",tval);
		return tval;
	}

	return -1;
}

static void bq27x00_update(struct bq27x00_device_info *di)
{
	struct bq27x00_reg_cache cache = {0, };
	bool is_bq27500 = di->chip == BQ27500;
	bool is_bq27425 = di->chip == BQ27425;
	bool is_bq27742 = di->chip == BQ27742;
	bool flags_1b = !(is_bq27500 || is_bq27742);
#ifdef CONFIG_T2M_PRODUCT_D01

	u8 read_msoc;
#endif

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	if(di->doing_auth){
		dev_err(di->dev, "[%s]processing authentication.\n",__func__);
		return;
	}
	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, flags_1b);
	if ((cache.flags & 0xff) == 0xff)
		{
		/* read error */
		cache.flags = -1;
		//cache.capacity = -ENODATA;
		cache.capacity=50;
		pr_err("zxz-----bq27x00_update-00-read error !!!----cache.flags=%x---\n",cache.flags);
		}
	if (cache.flags >= 0) {
		if (!is_bq27500 && !is_bq27425 && !is_bq27742
				&& (cache.flags & BQ27000_FLAG_CI)) {
			dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n");
			cache.capacity = -ENODATA;
			cache.energy = -ENODATA;
			cache.time_to_empty = -ENODATA;
			cache.time_to_empty_avg = -ENODATA;
			cache.time_to_full = -ENODATA;
			cache.charge_full = -ENODATA;
			cache.health = -ENODATA;
			cache.capacity=50;
			pr_err("zxz-----bq27x00_update--set default to 50--\n");
		} else {
			cache.capacity = bq27x00_battery_read_rsoc(di);
			if (is_bq27742)
				cache.time_to_empty =
					bq27x00_battery_read_time(di,
							BQ27x00_REG_TTE);
			else if (!is_bq27425) {
				cache.energy = bq27x00_battery_read_energy(di);
				cache.time_to_empty =
					bq27x00_battery_read_time(di,
							BQ27x00_REG_TTE);
				cache.time_to_empty_avg =
					bq27x00_battery_read_time(di,
							BQ27x00_REG_TTECP);
				cache.time_to_full =
					bq27x00_battery_read_time(di,
							BQ27x00_REG_TTF);
			}
			cache.charge_full = bq27x00_battery_read_lmd(di);
			cache.health = bq27x00_battery_read_health(di);
			cache.remaining_life = bq27x00_battery_read_remaining_life(di);//add the prop soh by zhaochuang.shao 20200929
		}
		cache.temperature = bq27x00_battery_read_temperature(di);
		if (!is_bq27425)
			cache.cycle_count = bq27x00_battery_read_cyct(di);
		if (is_bq27742)
			cache.power_avg =
				bq27x00_battery_read_pwr_avg(di,
						BQ27742_POWER_AVG);
		else
			cache.power_avg =
				bq27x00_battery_read_pwr_avg(di,
						BQ27x00_POWER_AVG);

		/* We only have to read charge design full once */
		if (di->charge_design_full <= 0)
			di->charge_design_full = bq27x00_battery_read_ilmd(di);

		/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
		di->is_present = true;
		/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	}
	else
		{
		cache.capacity=50;
		pr_err("zxz-----bq27x00_update--read error !!!-cache.flags=%x-setdefault=50--\n",cache.flags);
	}

/*Bug7815737, Begin , flash not work after change battery from low (less than 10 percent) to high */
/*the value 0x19 is the register'0x48bf' of 10 percent, if 0x18=9 percent the flash will not work,'qcom,flash-disable-soc' is the flash disable soc in dtsi  */
#ifdef CONFIG_T2M_PRODUCT_D01
		if (g_qgchip != NULL)
			{
				qg_read_monotonic_soc(g_qgchip,&read_msoc);
				pr_err("zxz--bq27x00_update--read_msoc=%x--di->cache.capacity=%d--cache.capacity=%d--\n",read_msoc,di->cache.capacity,cache.capacity);

				if(((read_msoc < 0x19 )||(cache.capacity < 10))&&(di->cache.capacity!=cache.capacity)){
					pr_err("---bq27x00_update---cache.capacity=%d--qg_write_monotonic_soc-\n",cache.capacity);
					qg_write_monotonic_soc_from_bq27x00(g_qgchip,cache.capacity);

				}
		}
#endif
/*Bug7815737, End , flash not work after change battery from low (less than 10 percent) to high */



	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) {
		di->cache = cache;
		power_supply_changed(di->bat);
	}
	pr_info("bq27x00_update-cache.capacity=%d,temp_k= %d,voltage = %d,current = %d,remaining_life = %d\n",di->cache.capacity,
		di->cache.temperature,bq27x00_read(di, BQ27x00_REG_VOLT, false),bq27x00_read(di, BQ27x00_REG_AI, false),di->cache.remaining_life);

	di->last_update = jiffies;
}

static void bq27x00_battery_poll(struct work_struct *work)
{
	struct bq27x00_device_info *di =
		container_of(work, struct bq27x00_device_info, work.work);

	bq27x00_update(di);
	#if 0
	if (poll_interval > 0) {
		/* The timer does not have to be accurate. */
		//set_timer_slack(&di->work.timer, poll_interval * HZ / 4);
		schedule_delayed_work(&di->work, poll_interval * HZ);
	}
	#endif
	
}

/*
 * Return the battery average current in µA
 * Note that current can be negative signed as well
 * Or 0 if something fails.
 */
static int bq27x00_battery_current(struct bq27x00_device_info *di,
	union power_supply_propval *val)
{
	int curr;
	int flags;

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	static int last_curr = 0;

	if(di->doing_auth){
		val->intval = last_curr;
		return 0;
	}
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */

	curr = bq27x00_read(di, BQ27x00_REG_AI, false);
	if (curr < 0) {
		dev_err(di->dev, "error reading current\n");
		return curr;
	}

	if (bq27xxx_is_chip_version_higher(di)) {
		/* bq27500 returns signed value */
		val->intval = (int)((s16)curr) * 1000;
	} else {
		flags = bq27x00_read(di, BQ27x00_REG_FLAGS, false);
		if (flags & BQ27000_FLAG_CHGS) {
			dev_dbg(di->dev, "negative current!\n");
			curr = -curr;
		}

		val->intval = curr * 3570 / BQ27000_RS;
	}
	//pr_debug("zxz--bq27x00_battery_current,  curr=%d--\n",val->intval);

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	last_curr = val->intval;
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */

	return 0;
}



#if 0
static int bq27x00_battery_status(struct bq27x00_device_info *di,
	union power_supply_propval *val)
{
	int status;

	if (bq27xxx_is_chip_version_higher(di)) {
		if (di->cache.flags & BQ27500_FLAG_FC)
			status = POWER_SUPPLY_STATUS_FULL;
		else if (di->cache.flags & BQ27500_FLAG_DSC)
			status = POWER_SUPPLY_STATUS_DISCHARGING;
		else
			status = POWER_SUPPLY_STATUS_CHARGING;
	} else {
		if (di->cache.flags & BQ27000_FLAG_FC)
			status = POWER_SUPPLY_STATUS_FULL;
		else if (di->cache.flags & BQ27000_FLAG_CHGS)
			status = POWER_SUPPLY_STATUS_CHARGING;
		else if (power_supply_am_i_supplied(di->bat))
			status = POWER_SUPPLY_STATUS_NOT_CHARGING;
		else
			status = POWER_SUPPLY_STATUS_DISCHARGING;
	}
	dev_info(di->dev, "bq27x00_battery_status st %d\n", status);
	val->intval = status;

	return 0;
}
#endif

static int bq27x00_battery_capacity_level(struct bq27x00_device_info *di,
	union power_supply_propval *val)
{
	int level;

	if (bq27xxx_is_chip_version_higher(di)) {
		if (di->cache.flags & BQ27500_FLAG_FC)
			level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
		else if (di->cache.flags & BQ27500_FLAG_SOC1)
			level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
		else if (di->cache.flags & BQ27500_FLAG_SOCF)
			level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
		else
			level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
	} else {
		if (di->cache.flags & BQ27000_FLAG_FC)
			level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
		else if (di->cache.flags & BQ27000_FLAG_EDV1)
			level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
		else if (di->cache.flags & BQ27000_FLAG_EDVF)
			level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
		else
			level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
	}

	val->intval = level;
	//pr_debug("zxz--bq27x00_battery_capacity_level,  cap_lev=%d--\n",val->intval);

	return 0;
}

/*
 * Return the battery Voltage in millivolts
 * Or < 0 if something fails.
 */
static int bq27x00_battery_voltage(struct bq27x00_device_info *di,
	union power_supply_propval *val)
{
	int volt;

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	static int last_volt = 0;

	if(di->doing_auth){
		val->intval = last_volt;
		return 0;
	}
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */

	volt = bq27x00_read(di, BQ27x00_REG_VOLT, false);
	if (volt < 0) {
		dev_err(di->dev, "error reading voltage\n");
		pr_err("zxz--bq27x00_battery_voltage, read voltage error set default voltage to 3.8v--\n");
		val->intval=3800000;
		return volt;
	}

	val->intval = volt * 1000;
	//pr_debug("zxz--bq27x00_battery_voltage,  vol=%d--\n",val->intval);

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	last_volt = val->intval;
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */

	return 0;
}

static int bq27x00_simple_value(int value,
	union power_supply_propval *val)
{
	if (value < 0)
		return value;

	val->intval = value;

	return 0;
}
#if 0
#define to_bq27x00_device_info(x) container_of((x), \
				struct bq27x00_device_info, bat);
#endif

static int bq27x00_battery_get_property(struct power_supply *psy,
					enum power_supply_property psp,
					union power_supply_propval *val)
{
	int ret = 0;
	//struct bq27x00_device_info *di = to_bq27x00_device_info(psy);
	struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
	//pr_err("zxz---bq27x00_battery_get_property--psp=%d-11-\n",psp);
	//union power_supply_propval smb5_psy_status = {0, };

	mutex_lock(&di->lock);
	if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
		//cancel_delayed_work_sync(&di->work);
		bq27x00_battery_poll(&di->work.work);
	}
	mutex_unlock(&di->lock);

	//if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
		//return -ENODEV;
	
	//pr_err("zxz---bq27x00_battery_get_property--psp=%d-22-\n",psp);
	switch (psp) {
	#if 0
	case POWER_SUPPLY_PROP_STATUS:
		ret = bq27x00_battery_status(di, val);
		break;
	#endif
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		ret = bq27x00_battery_voltage(di, val);
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = di->cache.flags < 0 ? 0 : 1;
		break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		ret = bq27x00_battery_current(di, val);
		break;
	case POWER_SUPPLY_PROP_CAPACITY:

		#if 0
		if(NULL==di->smb5_psy)
			di->smb5_psy=power_supply_get_by_name("battery");
		if(NULL!=di->smb5_psy){
		power_supply_get_property(di->smb5_psy, POWER_SUPPLY_PROP_STATUS, &smb5_psy_status);
		pr_err("bq27x00_battery_get_property ,smb5_psy_status=%d---\n",smb5_psy_status.intval);
		if(POWER_SUPPLY_STATUS_FULL==smb5_psy_status.intval){
			di->cache.capacity=100;
			pr_err("bq27x00_battery_get_property ,smb5_psy_status=POWER_SUPPLY_STATUS_FULL, set capacity to 100---\n");
			}
		}
		#endif
		ret = bq27x00_simple_value(di->cache.capacity, val);
		break;
	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
		ret = bq27x00_battery_capacity_level(di, val);
		break;
	case POWER_SUPPLY_PROP_TEMP:
		ret = bq27x00_simple_value(di->cache.temperature, val);
		if (ret == 0)
			val->intval -= 2731;
		if(val->intval >= 700){//added by zhaochuang.shao for debug the temp error 1655 degreen sometime 20210302,PR:10125492
			pr_err("%s:%d: temp = %d,voltage = %d,current(mA) = %d,temp_i2c = %d\n",__FUNCTION__,__LINE__,
				val->intval,bq27x00_read(di, BQ27x00_REG_VOLT, false),bq27x00_read(di, BQ27x00_REG_AI, false),
				bq27x00_read(di, BQ27x00_REG_TEMP, false));
		}
		break;
	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
		ret = bq27x00_simple_value(di->cache.time_to_empty, val);
		break;
	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
		ret = bq27x00_simple_value(di->cache.time_to_empty_avg, val);
		break;
	case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
		ret = bq27x00_simple_value(di->cache.time_to_full, val);
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
		break;
	case POWER_SUPPLY_PROP_CHARGE_NOW:
		ret = bq27x00_simple_value(bq27x00_battery_read_nac(di), val);
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL:
		ret = bq27x00_simple_value(di->cache.charge_full, val);
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
		ret = bq27x00_simple_value(di->charge_design_full, val);
		break;
	case POWER_SUPPLY_PROP_CYCLE_COUNT:
		ret = bq27x00_simple_value(di->cache.cycle_count, val);
		break;
	case POWER_SUPPLY_PROP_ENERGY_NOW:
		ret = bq27x00_simple_value(di->cache.energy, val);
		break;
	case POWER_SUPPLY_PROP_POWER_AVG:
		ret = bq27x00_simple_value(di->cache.power_avg, val);
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		ret = bq27x00_simple_value(di->cache.health, val);
		break;
	case POWER_SUPPLY_PROP_SOH://add the prop soh by zhaochuang.shao 20200929
		ret = bq27x00_simple_value(di->cache.remaining_life, val);
		break;
	default:
		return -EINVAL;
	}

	return ret;
}

static void bq27x00_external_power_changed(struct power_supply *psy)
{
	//struct bq27x00_device_info *di = to_bq27x00_device_info(psy);
	struct bq27x00_device_info *di = power_supply_get_drvdata(psy);

	cancel_delayed_work_sync(&di->work);
	schedule_delayed_work(&di->work, 0);
}

static const struct power_supply_desc bq27x00_power_supply_desc = {
	.name = "bq27x00-battery",
	.type = POWER_SUPPLY_TYPE_BATTERY,
	.properties = bq27x00_battery_props,
	.num_properties = ARRAY_SIZE(bq27x00_battery_props),
	.get_property = bq27x00_battery_get_property,
	.external_power_changed = bq27x00_external_power_changed,
};


static int bq27x00_powersupply_init(struct bq27x00_device_info *di)
{
	//int ret;

	struct power_supply_config psy_cfg = { .drv_data = di, };

pr_err("shao:%s:%d\n",__func__,__LINE__);
#if 0
	di->bat.type = POWER_SUPPLY_TYPE_BMS;
	if (di->chip == BQ27425) {
		di->bat.properties = bq27425_battery_props;
		di->bat.num_properties = ARRAY_SIZE(bq27425_battery_props);
	} else if (di->chip == BQ27742) {
		di->bat.properties = bq27742_battery_props;
		di->bat.num_properties = ARRAY_SIZE(bq27742_battery_props);
	} else {
		di->bat.properties = bq27x00_battery_props;
		di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);
	}
	di->bat.get_property = bq27x00_battery_get_property;
	di->bat.external_power_changed = bq27x00_external_power_changed;
#endif
	INIT_DELAYED_WORK(&di->work, bq27x00_battery_poll);
	mutex_init(&di->lock);

#if 0
	ret = power_supply_register(di->dev, &di->bat);
	if (ret) {
		dev_err(di->dev, "failed to register battery: %d\n", ret);
		return ret;
	}
#endif

	di->bat = devm_power_supply_register(di->dev,
						 &bq27x00_power_supply_desc,
						 &psy_cfg);


	dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);

	bq27x00_update(di);

	return 0;
}

static void bq27x00_powersupply_unregister(struct bq27x00_device_info *di)
{
	/*
	 * power_supply_unregister call bq27x00_battery_get_property which
	 * call bq27x00_battery_poll.
	 * Make sure that bq27x00_battery_poll will not call
	 * schedule_delayed_work again after unregister (which cause OOPS).
	 */
	poll_interval = 0;

	cancel_delayed_work_sync(&di->work);

	power_supply_unregister(di->bat);

	mutex_destroy(&di->lock);
}


/* i2c specific code */
#ifdef CONFIG_BATTERY_BQ27X00_I2C

/* If the system has several batteries we need a different name for each
 * of them...
 */
static DEFINE_IDR(battery_id);
static DEFINE_MUTEX(battery_mutex);

static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg, bool single)
{
	struct i2c_client *client = to_i2c_client(di->dev);
	struct i2c_msg msg[2];
	unsigned char data[2];
	int ret;

	if (!client->adapter)
		return -ENODEV;

	msg[0].addr = client->addr;
	msg[0].flags = 0;
	msg[0].buf = &reg;
	msg[0].len = sizeof(reg);
	msg[1].addr = client->addr;
	msg[1].flags = I2C_M_RD;
	msg[1].buf = data;
	if (single)
		msg[1].len = 1;
	else
		msg[1].len = 2;

	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
	if (ret < 0)
		return ret;

	if (!single)
		ret = get_unaligned_le16(data);
	else
		ret = data[0];

	return ret;
}

static int bq27x00_battery_probe(struct i2c_client *client,
				 const struct i2c_device_id *id)
{
	char *name;
	struct bq27x00_device_info *di;
	int num;
	int retval = 0;
	int retry_times = 0;
	pr_err("zxz----bq27000_battery_probe--I2C----11-\n");

	/* Get new ID for the new battery device */
	mutex_lock(&battery_mutex);
	num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
	mutex_unlock(&battery_mutex);
	if (num < 0)
		return num;
	//pr_err("zxz----bq27000_battery_probe--I2C-22-\n");

	name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
	if (!name) {
		dev_err(&client->dev, "failed to allocate device name\n");
		retval = -ENOMEM;
		goto batt_failed_1;
	}
	//pr_err("zxz----bq27000_battery_probe--I2C-33-\n");

	di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
	if (!di) {
		dev_err(&client->dev, "failed to allocate device info data\n");
		retval = -ENOMEM;
		goto batt_failed_2;
	}
	//pr_err("zxz----bq27000_battery_probe--I2C-44-\n");

	di->id = num;
	di->dev = &client->dev;
	di->chip = id->driver_data;
	//di->bat.name = name;
	di->bus.read = &bq27x00_read_i2c;
	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	di->bus.write = &bq27xxx_battery_i2c_write;
	di->doing_auth = false;
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	//pr_err("zxz----bq27000_battery_probe--I2C-55--di->chip=%d---\n",di->chip);

	for (retry_times = 0; retry_times < 3; retry_times++) {
		retval = bq27x00_battery_read_health(di);
		udelay(100);
		if (retval >= 0)
			break;
	}
	if (retry_times >= 3) {
		dev_err(&client->dev, "device not found\n");
		retval = -ENODEV;
		goto batt_failed_2;
	}
	//pr_err("zxz----bq27000_battery_probe--I2C-66-\n");

	retval = bq27x00_powersupply_init(di);
	if (retval)
		goto batt_failed_2;
	//pr_err("zxz----bq27000_battery_probe--I2C-77-\n");

	i2c_set_clientdata(client, di);
	pr_err("zxz----bq27000_battery_probe--I2C-88-\n");

	/* [BEGIN] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */
	retval = bq27541_create_attrs(&(di->bat->dev));
	if (retval) {
		dev_err(di->dev, "fail to create main sysfs: %d\n", retval);
		return retval;
	}
	/* [END] add by jianfeng.ou, for ALM8402940. Battery Authentication. 2020-01-03 */

	return 0;

batt_failed_2:
	kfree(name);
	
	pr_err("zxz----bq27000_battery_probe--I2C-99-\n");
batt_failed_1:
	
	pr_err("zxz----bq27000_battery_probe--I2C-AA-\n");
	mutex_lock(&battery_mutex);
	idr_remove(&battery_id, num);
	mutex_unlock(&battery_mutex);

	return retval;
}

static int bq27x00_battery_remove(struct i2c_client *client)
{
	struct bq27x00_device_info *di = i2c_get_clientdata(client);

	bq27x00_powersupply_unregister(di);

	//kfree(di->bat.name);

	mutex_lock(&battery_mutex);
	idr_remove(&battery_id, di->id);
	mutex_unlock(&battery_mutex);

	return 0;
}

static const struct i2c_device_id bq27x00_id[] = {
	{ "bq27200", BQ27000 },	/* bq27200 is same as bq27000, but with i2c */
	{ "bq27500", BQ27500 },
	{ "bq27425", BQ27425 },
	{ "bq27742", BQ27742 },
	{ "bq27541", BQ27500 },
	{},
};
MODULE_DEVICE_TABLE(i2c, bq27x00_id);
static struct of_device_id bq27541_match_table[] = {
        { .compatible = "bq,bq27541", },
        { },
};
MODULE_DEVICE_TABLE(of, bq27541_match_table);

static struct i2c_driver bq27x00_battery_driver = {
	.driver = {
		.name = "bq27x00-battery",
		.owner = THIS_MODULE,			
		.of_match_table = of_match_ptr(bq27541_match_table),
	},
	.probe = bq27x00_battery_probe,
	.remove = bq27x00_battery_remove,
	.id_table = bq27x00_id,
};

static inline int bq27x00_battery_i2c_init(void)
{

	int ret = i2c_add_driver(&bq27x00_battery_driver);
	
	pr_err("zxz----bq27x00_battery_i2c_init----%s:%d,ret == %d\n",__func__,__LINE__,ret);
	if (ret)
		printk(KERN_ERR "Unable to register BQ27x00 i2c driver\n");

	return ret;
}

static inline void bq27x00_battery_i2c_exit(void)
{
	i2c_del_driver(&bq27x00_battery_driver);
}

#else

static inline int bq27x00_battery_i2c_init(void) { greturn 0; }
static inline void bq27x00_battery_i2c_exit(void) {};

#endif

/* platform specific code */
#ifdef CONFIG_BATTERY_BQ27X00_PLATFORM

static int bq27000_read_platform(struct bq27x00_device_info *di, u8 reg,
			bool single)
{
	struct device *dev = di->dev;
	struct bq27000_platform_data *pdata = dev->platform_data;
	unsigned int timeout = 3;
	int upper, lower;
	int temp;

	if (!single) {
		/* Make sure the value has not changed in between reading the
		 * lower and the upper part */
		upper = pdata->read(dev, reg + 1);
		do {
			temp = upper;
			if (upper < 0)
				return upper;

			lower = pdata->read(dev, reg);
			if (lower < 0)
				return lower;

			upper = pdata->read(dev, reg + 1);
		} while (temp != upper && --timeout);

		if (timeout == 0)
			return -EIO;

		return (upper << 8) | lower;
	}

	return pdata->read(dev, reg);
}

static int bq27000_battery_probe(struct platform_device *pdev)
{
	struct bq27x00_device_info *di;
	struct bq27000_platform_data *pdata = pdev->dev.platform_data;
	//pr_err("zxz----bq27000_battery_probe--platform--\n");
	if (!pdata) {
		dev_err(&pdev->dev, "no platform_data supplied\n");
		return -EINVAL;
	}

	if (!pdata->read) {
		dev_err(&pdev->dev, "no hdq read callback supplied\n");
		return -EINVAL;
	}

	di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
	if (!di) {
		dev_err(&pdev->dev, "failed to allocate device info data\n");
		return -ENOMEM;
	}

	platform_set_drvdata(pdev, di);

	di->dev = &pdev->dev;
	di->chip = BQ27000;

	//di->bat.name = pdata->name ?: dev_name(&pdev->dev);
	di->bus.read = &bq27000_read_platform;

	return bq27x00_powersupply_init(di);
}

static int bq27000_battery_remove(struct platform_device *pdev)
{
	struct bq27x00_device_info *di = platform_get_drvdata(pdev);

	bq27x00_powersupply_unregister(di);

	return 0;
}

static struct platform_driver bq27000_battery_driver = {
	.probe	= bq27000_battery_probe,
	.remove = bq27000_battery_remove,
	.driver = {
		.name = "bq27000-battery",
		.owner = THIS_MODULE,
	},
};

static inline int bq27x00_battery_platform_init(void)
{
	int ret = platform_driver_register(&bq27000_battery_driver);
	
	//pr_err("zxz----bq27x00_battery_platform_init----\n");
	if (ret)
		printk(KERN_ERR "Unable to register BQ27000 platform driver\n");

	return ret;
}

static inline void bq27x00_battery_platform_exit(void)
{
	platform_driver_unregister(&bq27000_battery_driver);
}

#else

static inline int bq27x00_battery_platform_init(void) { return 0; }
static inline void bq27x00_battery_platform_exit(void) {};

#endif

/*
 * Module stuff
 */

static int __init bq27x00_battery_init(void)
{
	int ret;
	//pr_err("zxz----bq27x00_battery_init--11--\n");

	ret = bq27x00_battery_i2c_init();
	if (ret)
		return ret;
	pr_err("zxz----bq27x00_battery_init--22--\n");

	ret = bq27x00_battery_platform_init();
	
	pr_err("zxz----bq27x00_battery_init--33-ret=%d-\n",ret);
	if (ret)
		bq27x00_battery_i2c_exit();
	pr_err("zxz----bq27x00_battery_init--44--\n");

	return ret;
}
module_init(bq27x00_battery_init);

static void __exit bq27x00_battery_exit(void)
{
	bq27x00_battery_platform_exit();
	bq27x00_battery_i2c_exit();
}
module_exit(bq27x00_battery_exit);

MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
MODULE_DESCRIPTION("BQ27x00 battery monitor driver");
MODULE_LICENSE("GPL");