CW2015 linux 锂电池驱动源码

linux 驱动

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描述：cw2015驱动源码在实际项目中验证过，可以放心使用，驱动代码功能正常。

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CW2015 驱动源码

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/types.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/gpio.h>

#include <linux/acpi.h>
#include <linux/of.h>
#include <linux/of_gpio.h>

#ifdef CONFIG_ARCH_SUNXI
#include <linux/sunxi-gpio.h>
#endif

#define CW2015_REG_VERSION        0x00
#define CW2015_REG_VCELL0        0x02
#define CW2015_REG_VCELL1        0x03
#define CW2015_REG_SOC0            0x04
#define CW2015_REG_SOC1            0x05
#define CW2015_REG_RRT_ALRT0        0x06
#define CW2015_REG_RRT_ALRT1        0x07
#define CW2015_REG_CONFIG        0x08
#define CW2015_REG_MODE            0x0A

#define CW2015_REG_BATINFO              0x10

#define CW2015_MODE_SLEEP        (6)
#define CW2015_MODE_QSTRT        (4)
#define CW2015_MODE_POR            (0)

#define CW2015_SLEEP_STAT_MASK        0xC0

#define CW2015_MANUFACTURER        "CellWise"
//#define BAT_LOW_INTERRUPT
#define BAT_LOW_INTERRUPT_PIN            "cw,irq"

#define UI_FULL                     100
#define SIZE_BATINFO                64

#define UFG 0x2

/* 电池建模信息，客户拿到自己电池匹配的建模信息后请替换 */

//battery model
static unsigned char cw_bat_config_info[SIZE_BATINFO] = {

0x14,0xDB,0x6E,0x67,0x64,0x63,0x61,0x60,
0x60,0x5B,0x59,0x54,0x4F,0x4F,0x40,0x30,
0x27,0x24,0x25,0x28,0x33,0x47,0x55,0x5A,
0x4B,0x5B,0x08,0xF6,0x26,0x46,0x55,0x67,
0x70,0x6E,0x6B,0x6D,0x3D,0x1A,0x7F,0x1A,
0x08,0x1C,0x4A,0x80,0x8E,0x90,0x90,0x32,
0x5D,0x84,0x93,0x97,0x80,0x99,0xC4,0xCB,
0x2F,0x00,0x64,0xA5,0xB5,0x22,0x10,0x19
};

struct cw2015_device {
    struct i2c_client *client;
    struct device *dev;
    struct power_supply *charger;
    struct delayed_work bat_monitor;

    struct regmap *rmap;

    u32 alrt_threshold;
    u32 emerg_threshold;
    bool warning_on;

    int voltage_mv;
    struct mutex lock; /* protect state data */
};

int g_battery_exist_flag = 0;
//unsigned char if_quickstart =0;
unsigned char reset_loop =0, wakeup_loop =0;

static int cw2015_hw_init(struct cw2015_device *cw);

static bool cw2015_is_volatile_reg(struct device *dev, unsigned int reg)
{
    switch (reg) {
    case CW2015_REG_VERSION:
    case CW2015_REG_VCELL0:
    case CW2015_REG_VCELL1:
    case CW2015_REG_SOC0:
    case CW2015_REG_SOC1:
        return false;

    default:
        return true;
    }
}

static const struct regmap_config cw2015_regmap_config = {
    .reg_bits = 8,
    .val_bits = 8,

    .max_register = CW2015_REG_MODE,
    .cache_type = REGCACHE_NONE,

    .volatile_reg = cw2015_is_volatile_reg,
};

static int cw2015_por(struct cw2015_device *cw)
{
    int ret = -1;

    printk("Reset cw2015!\n");
    regmap_write(cw->rmap, CW2015_REG_MODE, 0xA0); //MODE Register (0x0A): 1100 0000 SLEEP MODE
    mdelay(30);  //delay 30ms

    regmap_write(cw->rmap, CW2015_REG_MODE, 0x00); //MODE Register (0x0A): 0000 0000 Normal MODE
    mdelay(10); //delay 10ms  
    /* reset */    
    regmap_write(cw->rmap, CW2015_REG_MODE, 0x0f); //MODE Register (0x0A): 0000 1111 reset MODE
    mdelay(10); //delay 10ms

    regmap_write(cw->rmap, CW2015_REG_MODE, 0x00); //MODE Register (0x0A): 0000 0000 Normal MODE
    mdelay(10); //delay 10ms

    ret = cw2015_hw_init(cw);

    return ret;
}

#ifdef BAT_LOW_INTERRUPT
/*当一次alrt 事件到来时，cw2015 ic会拉低arlt pin产生中断，这时需要对06寄存器的最高bit位清0，才能让cw2015 ic释放alrt pin 下面函数的作用是释放alrt pin*/
static int cw2015_release_alrt_pin(struct cw2015_device *cw)
{
    unsigned int reg_val;
    int alrt = 0;
        
    regmap_read(cw->rmap, CW2015_REG_RRT_ALRT0, &reg_val);
    printk("cw2015_irq_handler_thread val=%08x\n", reg_val);
    alrt = reg_val & 0x80;
    if (alrt)
    {
        reg_val = reg_val & 0x7f;
        regmap_update_bits(cw->rmap, CW2015_REG_RRT_ALRT0, 0