关机充电，会偶现电量50%

关机模式下，插入USB充电，不管电量多少，都偶现电量显示50%
原因：

1. int bat_thread_kthread(void *x)
   
2. {
   
3. ktime_t ktime = ktime_set(3, 0); /* 10s, 10* 1000 ms */
   
4. #ifdef Battery_CDP_WORKAROUND
   
5. if(is_charger_detection_rdy()==KAL_FALSE){
   
6. battery_log(BAT_LOG_CRTI, "CDP, block\n");
   
7. wait_event(bat_thread_wq, (is_charger_detection_rdy()==KAL_TRUE));
   
8. battery_log(BAT_LOG_CRTI, "CDP, free\n");
   
9. }else{
   
10. battery_log(BAT_LOG_CRTI, "CDP, PASS\n");
    
11. }
    
12. #endif

复制代码

应为打开了BATTERY_CDP_WORKAROUND这个宏，当在charger detect时由于usb没有ready的情况下，会导致在read battery 节点在update之前，所以读出来的值是默认的50，所以应该在get
battery capacity时加个小延迟，
解决方法：
修改如下：
在alps\vendor\mediatek\proprietary\external\charger\charging_control.cpp中的static int get_capacity()

1. static int get_capacity()
   
2. {
   
3. #if defined(mtk_PUMP_EXPRESS_SUPPORT) || defined(MTK_PUMP_EXPRESS_PLUS_SUPPORT)
   
4. while(get_int_value(BATT_CAPACITY_PATH)==-1);
   
5. #endif
   
6. return get_int_value(BATT_CAPACITY_PATH);
   
7. }

复制代码

改为：

1. static int get_capacity()
   
2. {
   
3. statice int is_first_get_bat_capacity = 1;
   
4. int count = 0;
   
5. #if defined(MTK_PUMP_EXPRESS_SUPPORT) || defined(MTK_PUMP_EXPRESS_PLUS_SUPPORT)
   
6. while(get_int_value(BATT_CAPACITY_PATH)==-1);
   
7. #endif
   
8. if(is_first_get_bat_capacity == 1)
   
9. {
   
10. while(get_int_value(BATT_CAPACITY_PATH)==50)
    
11. {
    
12. count++;
    
13. if(count >=10)
    
14. break;
    
15. usleep(100*1000);
    
16. }
    
17. is_first_get_bat_capacity = 0;
    
18. return get_int_value(BATT_CAPACITY_PATH);
    
19. }
    
20. return get_int_value(BATT_CAPACITY_PATH);
    
21. }

复制代码