From 2d8e3debb654462125e8fe13b8b7acf3597d8250 Mon Sep 17 00:00:00 2001
From: Andrzej Kaczmarek <andrzej.kaczmarek@codecoup.pl>
Date: Tue, 20 Jun 2017 15:03:34 +0200
Subject: [PATCH] nimble/controller: Emit build error when building with
 non-32kHz clock

X-Original-Commit: cdf566d3747ec6f50fc5c0ecfb10d357bc1da2be
---
 nimble/controller/include/controller/ble_ll.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nimble/controller/include/controller/ble_ll.h b/nimble/controller/include/controller/ble_ll.h
index d397750c9..9bf3bcaaa 100644
--- a/nimble/controller/include/controller/ble_ll.h
+++ b/nimble/controller/include/controller/ble_ll.h
@@ -31,6 +31,10 @@
 extern "C" {
 #endif
 
+#if MYNEWT_VAL(OS_CPUTIME_FREQ) != 32768
+#error 32.768kHz clock required
+#endif
+
 /*
  * XXX:
  * I guess this should not depend on the 32768 crystal to be honest. This