From fe99ca6682fdccd489fd1a6e82c0b5cf10c07b5c Mon Sep 17 00:00:00 2001
From: Kamil Kasperczyk <kamil.kasperczyk@nordicsemi.no>
Date: Wed, 22 Jan 2025 07:51:44 +0100
Subject: [PATCH] [nrf fromtree] net: Added configuring child timeouts on
 openthread start

Some time ago three Kconfigs dedicated for the child timeouts
configuration were added, but changing them does not apply when
using OpenThread libraries. Added setting these values using
openthread API on openthread start.

Upstream PR #: 84355

Signed-off-by: Kamil Kasperczyk <kamil.kasperczyk@nordicsemi.no>
---
 subsys/net/l2/openthread/openthread.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/subsys/net/l2/openthread/openthread.c b/subsys/net/l2/openthread/openthread.c
index c70adc0714c..51549bd8de5 100644
--- a/subsys/net/l2/openthread/openthread.c
+++ b/subsys/net/l2/openthread/openthread.c
@@ -21,6 +21,7 @@ LOG_MODULE_REGISTER(net_l2_openthread, CONFIG_OPENTHREAD_L2_LOG_LEVEL);
 #include <zephyr/sys/__assert.h>
 #include <zephyr/version.h>
 
+#include <openthread/child_supervision.h>
 #include <openthread/cli.h>
 #include <openthread/ip6.h>
 #include <openthread/link.h>
@@ -442,6 +443,13 @@ int openthread_start(struct openthread_context *ot_context)
 		otLinkSetPollPeriod(ot_context->instance, OT_POLL_PERIOD);
 	}
 
+	/* Configure Child Supervision and MLE Child timeouts. */
+	otChildSupervisionSetInterval(ot_context->instance,
+				      CONFIG_OPENTHREAD_CHILD_SUPERVISION_INTERVAL);
+	otChildSupervisionSetCheckTimeout(ot_context->instance,
+					  CONFIG_OPENTHREAD_CHILD_SUPERVISION_CHECK_TIMEOUT);
+	otThreadSetChildTimeout(ot_context->instance, CONFIG_OPENTHREAD_MLE_CHILD_TIMEOUT);
+
 	if (otDatasetIsCommissioned(ot_instance)) {
 		/* OpenThread already has dataset stored - skip the
 		 * configuration.