diff --git a/drivers/pwm/pwm-at91.c b/drivers/pwm/pwm-at91.c
index 95597aee..3ff1fb6 100644
--- a/drivers/pwm/pwm-at91.c
+++ b/drivers/pwm/pwm-at91.c
@@ -14,11 +14,11 @@
 #include <dm.h>
 #include <linux/bitops.h>
 #include <linux/io.h>
+#include <linux/time.h>
 #include <pwm.h>
 
 #define PERIOD_BITS 16
 #define PWM_MAX_PRES 10
-#define NSEC_PER_SEC 1000000000L
 
 #define PWM_ENA 0x04
 #define PWM_CHANNEL_OFFSET 0x20