diff --git a/drivers/pwm/pwm_th1520.rs b/drivers/pwm/pwm_th1520.rs
index 3e3fa51ccef9..543bd8dea846 100644
--- a/drivers/pwm/pwm_th1520.rs
+++ b/drivers/pwm/pwm_th1520.rs
@@ -23,15 +23,21 @@
 use core::ops::Deref;
 use kernel::{
     clk::Clk,
-    device::{Bound, Core, Device},
+    device::{
+        Bound,
+        Core,
+        Device, //
+    },
     devres,
     io::{
         mem::IoMem,
         Io, //
     },
-    of, platform,
+    of,
+    platform,
     prelude::*,
-    pwm, time,
+    pwm,
+    time, //
 };
 
 const TH1520_MAX_PWM_NUM: u32 = 6;