From 7271c928ccc44fc0345ffdf9f600f8b614628357 Mon Sep 17 00:00:00 2001
From: Yonezawa-T2 <Yonezawa-T2@mail.dnp.co.jp>
Date: Tue, 29 Mar 2016 17:39:36 +0900
Subject: [PATCH] i2c: add missing #ifdef block

---
 cpu/cc2538/periph/i2c.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cpu/cc2538/periph/i2c.c b/cpu/cc2538/periph/i2c.c
index 64557f9d2c..f4d5c8b952 100644
--- a/cpu/cc2538/periph/i2c.c
+++ b/cpu/cc2538/periph/i2c.c
@@ -27,7 +27,10 @@
 #include "periph/i2c.h"
 #include "sched.h"
 #include "thread.h"
+#ifdef MODULE_XTIMER
 #include "xtimer.h"
+#endif
+#include "timex.h" /* for SEC_IN_USEC */
 
 #define ENABLE_DEBUG (0)
 #include "debug.h"
@@ -188,7 +191,9 @@ static uint_fast8_t i2c_ctrl_blocking(uint_fast8_t flags)
 
     if (I2CM_STAT & BUSY) {
         /* If the controller is still busy, it probably will be forever */
+#ifdef MODULE_XTIMER
         DEBUG("Master is still BUSY after %u usec. Resetting.\n", xtimer_timeout);
+#endif
         cc2538_i2c_init_master(speed_hz);
     }