[Linux Device Driver] android 11电池温度过高导致设备反复重启

0. 背景

之前有个项目要升级android 11，但是设备一直反复重启，然后他们觉得是音频导致的，还让我一个小兄弟周末也来加班。。原因是看到了音频的报错log一直在刷新：
#更新2021.08.02
这个我来更新下，随着阅历的增加，我发现这个报错是会导致进不了android的，就这个android.hardware.soundtrigger报错，我把声卡注册上才OK，由于某些音频服务报错，会一直尝试进入android，但是进入不了。
#更新2021.08.02

android.hardware.soundtrigger@2.0::ISoundTriggerHw/default

[ 1240.972777] healthd: battery l=78 v=4079 t=82.8 h=3 
st=4 c=0 fc=3581000 cc=0 chg=u
[ 1241.570246] init: Control message: Could not find
 'android.hardware.soundtrigger@2.0::ISoundTriggerHw/default' 
for ctl.interface_start from pid: 514 (/system/bin/hwservicemanager)
[ 1242.565190] init: Control message: Could not find 
'android.hardware.soundtrigger@2.0::ISoundTriggerHw/default'
 for ctl.interface_start from pid: 514 (/system/bin/hwservicemanager)
[ 1243.571629] init: Control message: Could not find 
'android.hardware.soundtrigger@2.0::ISoundTriggerHw/default' 
for ctl.interface_start from pid: 514 (/system/bin/hwservicemanager)
[ 1244.586074] init: Control message: Could not find 
'android.hardware.soundtrigger@2.0::ISoundTriggerHw/default' 
for ctl.interface_start from pid: 514 (/system/bin/hwservicemanager)
[ 1249.091284] healthd: battery l=78 v=4079 t=82.8 h=3 st=4 c=0 
fc=3581000 cc=0 chg=u
[ 1250.056593] init: Control message: Could not find 
'android.hardware.soundtrigger@2.0::ISoundTriggerHw/default' 
for ctl.interface_start from pid: 514 (/system/bin/hwservicemanager)
[ 1251.069547] init: Control message: Could not find 
'android.hardware.soundtrigger@2.0::ISoundTriggerHw/default' 
for ctl.interface_start from pid: 514 (/system/bin/hwservicemanager)
[ 1252.082157] init: Control message: Could not find 
'android.hardware.soundtrigger@2.0::ISoundTri

因为最开始项目调试阶段，没有关机充电模式配置，然后上层检测到82.8度，然后高温导致关机，然后关机充电模式没有进去，又开机，然后检测到温度超了，又关机，表现出来就反复重启了。

1. 解决方案

我瞅了眼发现电池温度异常，关键 log如下：

healthd: battery l=78 v=4079 t=82.8 h=3 st=4 c=0 fc=3581000 cc=0 chg=u

把温度强制写死为25摄氏度即可正常开机，修改方法如下：
（这个只是前期的临时方案，后面还要搞电源管理的兄弟的看看啥原因，我也是业余的）

文件路径：kernel/msm-4.19/drivers/power/supply/qcom/qpnp-qg.c

@@ -2178,6 +2168,9 @@
 		break;
 	case POWER_SUPPLY_PROP_TEMP:
 		rc = qg_get_battery_temp(chip, &pval->intval);
+		//the temperature of battery  was too high, causing the machine to restart
+		pval->intval = 250;
 		break;
 	case POWER_SUPPLY_PROP_RESISTANCE_ID:
 		pval->intval = chip->batt_id_ohm;


文件路径：kernel/msm-4.19/drivers/power/supply/qcom/qpnp-smb5.c
@@ -1416,6 +1416,9 @@
 		else
 			rc = smblib_get_prop_from_bms(chg,
 						POWER_SUPPLY_PROP_TEMP, val);
+		//the temperature of battery and BMS was too high, causing the machine to restart.
+		val->intval = 250;
 		break;
 	case POWER_SUPPLY_PROP_TECHNOLOGY:
 		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;