From a11c66382fa11fa6d321b56a636a26b8a209b4df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joakim=20Nohlg=C3=A5rd?= <joakim.nohlgard@eistec.se>
Date: Wed, 15 Nov 2017 21:20:35 +0100
Subject: [PATCH] kinetis: Add dependency on rtt for LPTMR time base

---
 cpu/kinetis/Makefile.dep | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cpu/kinetis/Makefile.dep b/cpu/kinetis/Makefile.dep
index 2728a327db..3a076de393 100644
--- a/cpu/kinetis/Makefile.dep
+++ b/cpu/kinetis/Makefile.dep
@@ -1,3 +1,8 @@
 ifneq (,$(filter periph_rtc,$(USEMODULE)))
   USEMODULE += periph_rtt
 endif
+ifneq (,$(filter periph_timer,$(USEMODULE)))
+  # RTT is used as the time base for the LPTMR driver.
+  # TODO: Remove when LPTMR is refactored.
+  FEATURES_OPTIONAL += periph_rtt
+endif