diff --git a/zh-cn/device-dev/driver/driver-platform-pwm-develop.md b/zh-cn/device-dev/driver/driver-platform-pwm-develop.md
index 12ccdece68228e8cf9d49a1588796425dbe99835..dd2e846b7809d31d3e8777b2026426c092c16f7a 100755
--- a/zh-cn/device-dev/driver/driver-platform-pwm-develop.md
+++ b/zh-cn/device-dev/driver/driver-platform-pwm-develop.md
@@ -213,7 +213,7 @@ PWM模块适配HDF框架的三个环节是配置属性文件，实例化驱动
       (void)obj;
       return HDF_SUCCESS;
     }
-    //挂载init的
+    
     static int32_t HdfPwmInit(struct HdfDeviceObject *obj)
     {
       int ret;
diff --git a/zh-cn/device-dev/subsystems/subsys-sensor-demo.md b/zh-cn/device-dev/subsystems/subsys-sensor-demo.md
old mode 100755
new mode 100644