diff --git a/non_plat/device.te b/non_plat/device.te
index 2b3e197..638ef5d 100644
--- a/non_plat/device.te
+++ b/non_plat/device.te
@@ -225,6 +225,7 @@ type cam_vpu_block_device,dev_type;
 type boot_para_block_device,dev_type;
 type mtk_dfrc_device, dev_type;
 type vbmeta_block_device, dev_type;
+type alarm_device, dev_type;
 
 ##########################
 # Sensor common Devices Start
diff --git a/non_plat/file_contexts b/non_plat/file_contexts
index 7e7256d..b9d6a95 100644
--- a/non_plat/file_contexts
+++ b/non_plat/file_contexts
@@ -339,6 +339,7 @@
 /dev/hrm       u:object_r:hrm_device:s0
 /dev/trusty-ipc-dev0 u:object_r:tee_device:s0
 /dev/mbim u:object_r:mbim_device:s0
+/dev/alarm(/.*)? u:object_r:alarm_device:s0
 ##########################
 # Sensor common Devices Start
 #
diff --git a/non_plat/system_server.te b/non_plat/system_server.te
index 6e8256b..7c2141a 100644
--- a/non_plat/system_server.te
+++ b/non_plat/system_server.te
@@ -201,3 +201,8 @@ binder_call(system_server, mtk_hal_wifi)
 #           ino=10312 scontext=u:r:system_server:s0 tcontext=
 #           u:object_r:persist_mtk_aee_prop:s0 tclass=file permissive=0
 get_prop(system_server, persist_mtk_aee_prop);
+
+# Date : W19.15
+# Operation : alarm device permission
+# Purpose : support power-off alarm
+allow system_server alarm_device:chr_file rw_file_perms;
\ No newline at end of file