diff --git a/raspberrypi-kernel-rt.spec b/raspberrypi-kernel-rt.spec
index e2fc637..adcdd4e 100644
--- a/raspberrypi-kernel-rt.spec
+++ b/raspberrypi-kernel-rt.spec
@@ -2,13 +2,13 @@
 
 %global KernelVer %{version}-%{release}.raspi.%{_target_cpu}
 
-%global hulkrelease 208.0.0
+%global hulkrelease 209.0.0
 
 %global debug_package %{nil}
 
 Name:	 raspberrypi-kernel-rt
 Version: 5.10.0
-Release: %{hulkrelease}.rt62.11
+Release: %{hulkrelease}.rt62.12
 Summary: Linux Kernel
 License: GPLv2
 URL:	 http://www.kernel.org/
@@ -45,6 +45,17 @@ ExclusiveOS: Linux
 %description
 The Linux Kernel preempt-rt image for RaspberryPi.
 
+%package devel
+Summary: Development package for building kernel modules to match the %{KernelVer} raspberrypi-kernel
+AutoReqProv: no
+Provides: raspberrypi-kernel-rt-devel-uname-r = %{KernelVer}
+Provides: raspberrypi-kernel-rt-devel-%{_target_cpu} = %{version}-%{release}
+Requires: perl findutils
+
+%description devel
+This package provides raspberrypi kernel headers and makefiles sufficient to build modules
+against the %{KernelVer} raspberrypi-kernel-rt package.
+
 %prep
 %setup -q -n kernel-%{version} -c
 mv kernel linux-%{version}
@@ -91,6 +102,71 @@ if ls arch/%{Arch}/boot/dts/overlays/*.dtb > /dev/null 2>&1; then
 fi
 install -m 644 arch/%{Arch}/boot/dts/overlays/README $RPM_BUILD_ROOT/boot/dtb-%{KernelVer}/overlays/
 
+mkdir -p $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build
+
+############ to do collect devel file  #########
+# 1. Makefile And Kconfig, .config sysmbol
+# 2. scrpits dir
+# 3. .h file
+find -type f \( -name "Makefile*" -o -name "Kconfig*" \) -exec cp --parents {} $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build \;
+for f in Module.symvers System.map Module.markers .config;do
+    test -f $f || continue
+    cp $f $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build
+done
+
+cp -a scripts $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build
+if [ -d arch/%{Arch}/scripts ]; then
+    cp -a arch/%{Arch}/scripts $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/arch/%{_arch} || :
+fi
+if [ -f arch/%{Arch}/*lds ]; then
+    cp -a arch/%{Arch}/*lds $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/arch/%{_arch}/ || :
+fi
+find $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/scripts/ -name "*.o" -exec rm -rf {} \;
+
+if [ -d arch/%{Arch}/include ]; then
+    cp -a --parents arch/%{Arch}/include $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/
+fi
+cp -a include $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/include
+
+if [ -f arch/%{Arch}/kernel/module.lds ]; then
+    cp -a --parents arch/%{Arch}/kernel/module.lds $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/
+fi
+
+# module.lds is moved to scripts by commit 596b0474d3d9 in linux 5.10.
+if [ -f scripts/module.lds ]; then
+    cp -a --parents scripts/module.lds $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/
+fi
+
+%ifarch aarch64
+    cp -a --parents arch/arm/include/asm $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/
+%endif
+
+# copy objtool for raspberrypi-kernel-devel (needed for building external modules)
+if grep -q CONFIG_STACK_VALIDATION=y .config; then
+    mkdir -p $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/tools/objtool
+    cp -a tools/objtool/objtool $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/tools/objtool
+fi
+
+# Make sure the Makefile and version.h have a matching timestamp so that
+# external modules can be built
+touch -r $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/Makefile $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/include/generated/uapi/linux/version.h
+touch -r $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/.config $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/include/generated/autoconf.h
+# for make prepare
+if [ ! -f $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/include/config/auto.conf ];then
+    cp .config $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build/include/config/auto.conf
+fi
+
+mkdir -p %{buildroot}/usr/src/kernels
+mv $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/build $RPM_BUILD_ROOT/usr/src/kernels/%{KernelVer}
+
+find $RPM_BUILD_ROOT/usr/src/kernels/%{KernelVer} -name ".*.cmd" -exec rm -f {} \;
+
+pushd $RPM_BUILD_ROOT/lib/modules/%{KernelVer}
+ln -sf /usr/src/kernels/%{KernelVer} build
+ln -sf build source
+popd
+
+
 %postun
 version_old=0
 if [ "$1" == "0" ]; then
@@ -161,6 +237,19 @@ if ls /boot/dtb-%{KernelVer}/overlays/*.dtb > /dev/null 2>&1; then
 fi
 install -m 644 /boot/dtb-%{KernelVer}/overlays/README /boot/overlays/
 
+%post devel
+if [ -f /etc/sysconfig/kernel ]
+then
+    . /etc/sysconfig/kernel || exit $?
+fi
+if [ "$HARDLINK" != "no" -a -x /usr/sbin/hardlink ]
+then
+    (cd /usr/src/kernels/%{KernelVer} &&
+     /usr/bin/find . -type f | while read f; do
+       hardlink -c /usr/src/kernels/*.oe*.*/$f $f
+     done)
+fi
+
 
 %files
 %defattr (-, root, root)
@@ -171,7 +260,17 @@ install -m 644 /boot/dtb-%{KernelVer}/overlays/README /boot/overlays/
 /boot/dtb-*
 /lib/modules/%{KernelVer}
 
+%files devel
+%defattr (-, root, root)
+%doc
+/lib/modules/%{KernelVer}/source
+/lib/modules/%{KernelVer}/build
+/usr/src/kernels/%{KernelVer}
+
 %changelog
+* Fri Jun 21 2024 zhangyu <zhangyu4@kylinos.cn> - 5.10.0-209.0.0.12
+- - update preempt-RT to openEuler 5.10.0-209.0.0
+
 * Tue Jun 18 2024 zhangyu <zhangyu4@kylinos.cn> - 5.10.0-208.0.0.11
 - - update preempt-RT to openEuler 5.10.0-208.0.0