/******************************************************************** *                  I.MX6 bq27441 GPOUT interrupt * 说明： *     由于目前的bq27441驱动中没有GPOUT中断驱动，所以需要另外加上，其 * 中有参考TI的驱动，但是内核版本不一致，所以处理方式也不一致。 * *                                  2016-7-15 深圳 南山平山村 曾剑锋 *******************************************************************/一、参考文档：    a reasonable example of a work queue?        http://www.spinics.net/lists/newbies/msg27303.html二、修改drivers/power/bq27x00_battery.c    ......    #include 
     
          #include 
      
               #define SABRESD_UAUGE_PIN        IMX_GPIO_NR(1, 29)    ......    static void battery_irq(struct work_struct *unused);    static DECLARE_DELAYED_WORK(battery_irq_work, battery_irq);    struct bq27x00_device_info *battery_irq_work_di = NULL;    static void battery_irq(struct work_struct *unused)    {        if (battery_irq_work_di != NULL)             bq27x00_update(battery_irq_work_di);    }    static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)    {        struct bq27x00_device_info *di = data;        battery_irq_work_di = di;        schedule_delayed_work(&battery_irq_work, 0);        return IRQ_HANDLED;    }    ......    static int __init bq27x00_battery_probe(struct i2c_client *client,                     const struct i2c_device_id *id)    {        ......        gpio_request(SABRESD_UAUGE_PIN, "sabresd_uauge_pin");        gpio_direction_input(SABRESD_UAUGE_PIN);        unsigned int irq = gpio_to_irq(SABRESD_UAUGE_PIN);        int ret = request_irq(irq, bq27xxx_battery_irq_handler_thread,                IRQF_TRIGGER_RISING,                 "sabresd_uauge_pin", di);        enable_irq_wake(irq);        ......    }