From deb2a4c97a95242ed858ddef5d79e00271f7d798 Mon Sep 17 00:00:00 2001
From: canisLupus1313 <85344032+canisLupus1313@users.noreply.github.com>
Date: Fri, 20 Aug 2021 20:10:50 +0200
Subject: [PATCH] [csl] disable CSL when detaching (#6936)

When child becomes detached the CSL wasn't disabled in the radio
driver, which caused problems with sending ParentRequest.
---
 src/core/thread/mle.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/core/thread/mle.cpp b/src/core/thread/mle.cpp
index 365540466..b9d88db12 100644
--- a/src/core/thread/mle.cpp
+++ b/src/core/thread/mle.cpp
@@ -619,6 +619,12 @@ bool Mle::IsRouterOrLeader(void) const
 
 void Mle::SetStateDetached(void)
 {
+#if OPENTHREAD_CONFIG_MAC_CSL_RECEIVER_ENABLE
+    if (Get<Mac::Mac>().IsCslEnabled())
+    {
+        IgnoreError(Get<Radio>().EnableCsl(0, GetParent().GetRloc16(), &GetParent().GetExtAddress()));
+    }
+#endif
 #if OPENTHREAD_FTD && OPENTHREAD_CONFIG_BACKBONE_ROUTER_ENABLE
     Get<BackboneRouter::Local>().Reset();
 #endif