[ptxdist] [PATCH v2 0/2] Add support for device tree overlays

[ptxdist] [PATCH v2 0/2] Add support for device tree overlays

[Michael Riesch]

Hi all,

Thanks to Christian Melki and Michael Olbrich for their reviews, their
comments are addressed in this v2 of the series.

Best regards,
Michael

Michael Riesch (2):
  ptxd_make_world_{dtb,dtbo}: add support for device tree overlays
  kernel: activate support for device tree overlays

 platforms/kernel.in                  | 32 ++++++++++-
 rules/kernel.make                    |  9 ++++
 rules/post/ptxd_make_world_dtbo.make | 21 ++++++++
 scripts/lib/ptxd_make_world_dtb.sh   | 79 ++++++++++++++++++++--------
 4 files changed, 118 insertions(+), 23 deletions(-)
 create mode 100644 rules/post/ptxd_make_world_dtbo.make

-- 
2.30.2


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[ptxdist] [PATCH v2 1/2] ptxd_make_world_{dtb, dtbo}: add support for device tree overlays

[Michael Riesch]

Make ptxd_make_dtb more general and provide suitable wrappers to
support the generation of device tree overlays.

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
---
 rules/post/ptxd_make_world_dtbo.make | 21 ++++++++
 scripts/lib/ptxd_make_world_dtb.sh   | 79 ++++++++++++++++++++--------
 2 files changed, 78 insertions(+), 22 deletions(-)
 create mode 100644 rules/post/ptxd_make_world_dtbo.make

diff --git a/rules/post/ptxd_make_world_dtbo.make b/rules/post/ptxd_make_world_dtbo.make
new file mode 100644
index 000000000..61babc653
--- /dev/null
+++ b/rules/post/ptxd_make_world_dtbo.make
@@ -0,0 +1,21 @@
+# -*-makefile-*-
+#
+# Copyright (C) 2020 by Michael Tretter <m.tretter@pengutronix.de>
+#
+# For further information about the PTXdist project and license conditions
+# see the README file.
+#
+
+world/dtbo/env = \
+	$(call world/env, $(1)) \
+	pkg_dtso_path="$($(1)_DTSO_PATH)" \
+	pkg_dtso="$($(1)_DTSO)" \
+	pkg_dtbo_dir="$($(1)_DTBO_DIR)" \
+	pkg_kernel_src="$($(1)_KERNEL_DIR)" \
+	pkg_arch="$(GENERIC_KERNEL_ARCH)"
+
+world/dtbo = \
+	$(call world/dtbo/env,$(strip $(1))) \
+	ptxd_make_world_dtbo
+
+# vim: syntax=make
diff --git a/scripts/lib/ptxd_make_world_dtb.sh b/scripts/lib/ptxd_make_world_dtb.sh
index f5e796b9d..f78d2f885 100644
--- a/scripts/lib/ptxd_make_world_dtb.sh
+++ b/scripts/lib/ptxd_make_world_dtb.sh
@@ -7,24 +7,22 @@
 #
 
 ptxd_make_dtb() {
-    local dtc dts tmp_dts dtb deps tmp_deps
+    local dtc dts tmp_dts dtb dtb_extra_args dtb_kernel_dir deps tmp_deps
 
-    if [[ "${dts_dts}" =~ ^/.* ]]; then
-	ptxd_bailout "'${dts_dts}' must not be an absolute path!" \
-	    "Use <PKG>_DTS_PATH to specify the search path."
-    fi
+    dts="${dtb_source}"
+    dtb="${dtb_target}"
 
-    if ! ptxd_in_path pkg_dts_path "${dts_dts}"; then
-	ptxd_bailout "Device-tree '${dts_dts}' not found in '${pkg_dts_path}'."
-    fi
-    dts="${ptxd_reply}"
-    dtb="${dtb_dir}/$(basename ${dts/%.dts/.dtb})"
+    dtb_kernel_dir="${pkg_kernel_src:-${pkg_dir}}"
 
-    dtc="${pkg_build_dir}/scripts/dtc/dtc"
+    dtc="${dtb_kernel_dir}/scripts/dtc/dtc"
     if [ ! -x "${dtc}" ]; then
 	dtc=dtc
     fi
 
+    if [ "$(ptxd_get_ptxconf PTXCONF_KERNEL_DTS_SUPPORT_OVERLAYS)" == "y" ]; then
+	dtb_extra_args="-@"
+    fi
+
     tmp_dts="${ptx_state_dir}/${pkg_label}.$(basename "${dts}").tmp"
 
     deps="${ptx_state_dir}/${pkg_label}.$(basename "${dts}").deps"
@@ -39,16 +37,16 @@ ptxd_make_dtb() {
 	-Wp,-MT,${dtb_deps_target} \
 	-nostdinc \
 	-I"$(dirname "${dts}")" \
-	-I${pkg_dir}/arch/${pkg_arch}/boot/dts \
-	-I${pkg_dir}/arch/${pkg_arch}/boot/dts/include \
-	-I${pkg_dir}/scripts/dtc/include-prefixes \
-	-I${pkg_dir}/drivers/of/testcase-data \
-	-I${pkg_dir}/include \
+	-I${dtb_kernel_dir}/arch/${pkg_arch}/boot/dts \
+	-I${dtb_kernel_dir}/arch/${pkg_arch}/boot/dts/include \
+	-I${dtb_kernel_dir}/scripts/dtc/include-prefixes \
+	-I${dtb_kernel_dir}/drivers/of/testcase-data \
+	-I${dtb_kernel_dir}/include \
 	-undef -D__DTS__ -x assembler-with-cpp \
 	-o ${tmp_dts} \
 	${dts} &&
 
-    sed -e "\;^ ${pkg_dir}[^ ]*;d" \
+    sed -e "\;^ ${dtb_kernel_dir}[^ ]*;d" \
 	-e 's;^ \([^ \]*\); $(wildcard \1);' "${tmp_deps}" > "${deps}" &&
     # empty line in case all dependencies were removed
     echo >> "${deps}" &&
@@ -57,9 +55,9 @@ ptxd_make_dtb() {
     echo "DTC $(ptxd_print_path "${dtb}")" &&
     ptxd_eval \
 	"${dtc}" \
-	$(ptxd_get_ptxconf PTXCONF_DTC_EXTRA_ARGS) \
+	"${dtb_extra_args}" \
 	-i "$(dirname "${dts}")" \
-	-i "${pkg_dir}/arch/${pkg_arch}/boot/dts" \
+	-i "${dtb_kernel_dir}/arch/${pkg_arch}/boot/dts" \
 	-d "${tmp_deps}" \
 	-I dts -O dtb -b 0 \
 	-o "${dtb}" "${tmp_dts}" &&
@@ -81,17 +79,54 @@ ptxd_make_dtb() {
 export -f ptxd_make_dtb
 
 
+ptxd_make_world_dtbo() {
+    local dtb_deps_target dtb_source dtb_target
+
+    ptxd_make_world_init || break
+
+    dtb_deps_target="${ptx_state_dir}/${pkg_stamp}"
+
+    echo -e "\nBuilding device tree overlays..."
+
+    for overlay in ${pkg_dtso}; do
+	if [[ "${overlay}" =~ ^/.* ]]; then
+	    ptxd_bailout "'${overlay}' must not be an absolute path!" \
+			 "Use <PKG>_DTSO_PATH to specify the search path."
+	fi
+
+	if ! ptxd_in_path pkg_dtso_path "${overlay}"; then
+	    ptxd_bailout "Overlay '${overlay}' not found in '${pkg_dtso_path}'."
+	fi
+	dtb_source="${ptxd_reply}"
+	dtb_target="${pkg_pkg_dir}/${pkg_dtbo_dir}/$(basename ${overlay/%.dts*/.dtbo})"
+
+	ptxd_make_dtb || break
+    done
+}
+export -f ptxd_make_world_dtbo
+
+
 ptxd_make_world_dtb() {
-    local dtb_deps_target dtb_dir
+    local dtb_deps_target dtb_source dtb_target
 
     ptxd_make_world_init || break
 
     dtb_deps_target="${ptx_state_dir}/${pkg_stamp}"
-    dtb_dir="${pkg_pkg_dir}/boot"
 
-    echo -e "\nBuilding Device trees..."
+    echo -e "\nBuilding device trees..."
 
     for dts_dts in ${pkg_dts}; do
+	if [[ "${dts_dts}" =~ ^/.* ]]; then
+	    ptxd_bailout "'${dts_dts}' must not be an absolute path!" \
+			 "Use <PKG>_DTS_PATH to specify the search path."
+	fi
+
+	if ! ptxd_in_path pkg_dts_path "${dts_dts}"; then
+	    ptxd_bailout "Device tree '${dts_dts}' not found in '${pkg_dts_path}'."
+	fi
+	dtb_source="${ptxd_reply}"
+	dtb_target="${pkg_pkg_dir}/boot/$(basename ${dts_dts/%.dts/.dtb})"
+
 	ptxd_make_dtb || break
     done
 }
-- 
2.30.2


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[ptxdist] [PATCH v2 2/2] kernel: activate support for device tree overlays

[Michael Riesch]

Activate the recently introduced support for device tree overlays
for the kernel package.

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
---
 platforms/kernel.in | 32 +++++++++++++++++++++++++++++++-
 rules/kernel.make   |  9 +++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/platforms/kernel.in b/platforms/kernel.in
index 9976436ce..9f355f5dc 100644
--- a/platforms/kernel.in
+++ b/platforms/kernel.in
@@ -186,7 +186,7 @@ config KERNEL_DTS_PATH
 	help
 	  Define path to the dts source file. Multiple directories can be
 	  specified separated by ':'. A relative path will be expanded relative
-	  to the workspace and all other layers. Only on of the specified paths
+	  to the workspace and all other layers. Only one of the specified paths
 	  can be a relative path.
 
 config KERNEL_DTS
@@ -198,6 +198,36 @@ config KERNEL_DTS
 	  is used as a search path for the device tree files specified
 	  here. Multiple dts files can be specified, separated by spaces.
 
+config KERNEL_DTS_SUPPORT_OVERLAYS
+	bool
+
+endif
+
+menuconfig KERNEL_DTBO
+	bool
+	select KERNEL_DTS_SUPPORT_OVERLAYS
+	prompt "Build device tree overlays    "
+
+if KERNEL_DTBO
+
+config KERNEL_DTSO_PATH
+	string "path to overlay file(s)"
+	default "${PTXDIST_PLATFORMCONFIG_SUBDIR}/dts/overlays:${KERNEL_DIR}/arch/${GENERIC_KERNEL_ARCH}/boot/dts"
+	help
+	  Define path to the dts(o) source file(s). Multiple directories can be
+	  specified separated by ':'. A relative path will be expanded relative
+	  to the workspace and all other layers. Only one of the specified paths
+	  can be a relative path.
+
+config KERNEL_DTSO
+	string "overlay file(s)"
+	default "<youroverlay>.dtso"
+	help
+	  Select the dts(o) file(s) to be compiled. For relative file
+	  names KERNEL_DTSO_PATH is used as a search path for the device
+	  tree files specified here.
+	  Multiple dts(o) files can be specified, separated by spaces.
+
 endif
 
 config KERNEL_CODE_SIGNING
diff --git a/rules/kernel.make b/rules/kernel.make
index 0ecf5f4e9..1b70faf21 100644
--- a/rules/kernel.make
+++ b/rules/kernel.make
@@ -29,7 +29,11 @@ KERNEL_BUILD_DIR	:= $(KERNEL_DIR)-build
 KERNEL_CONFIG		:= $(call ptx/in-platformconfigdir, $(call remove_quotes, $(PTXCONF_KERNEL_CONFIG)))
 KERNEL_DTS_PATH		:= $(call remove_quotes,$(PTXCONF_KERNEL_DTS_PATH))
 KERNEL_DTS		:= $(call remove_quotes,$(PTXCONF_KERNEL_DTS))
+KERNEL_DTSO_PATH	:= $(call remove_quotes,$(PTXCONF_KERNEL_DTSO_PATH))
+KERNEL_DTSO		:= $(call remove_quotes,$(PTXCONF_KERNEL_DTSO))
 KERNEL_DTB_FILES	:= $(addsuffix .dtb,$(basename $(KERNEL_DTS)))
+KERNEL_DTBO_FILES	:= $(addsuffix .dtbo,$(basename $(KERNEL_DTSO)))
+KERNEL_DTBO_DIR		:= /boot/overlays
 KERNEL_LICENSE		:= GPL-2.0-only
 KERNEL_SOURCE		:= $(SRCDIR)/$(KERNEL).$(KERNEL_SUFFIX)
 KERNEL_DEVPKG		:= NO
@@ -265,6 +269,7 @@ ifdef PTXCONF_KERNEL_MODULES_INSTALL
 	@$(call world/install, KERNEL)
 endif
 	@$(call world/dtb, KERNEL)
+	@$(call world/dtbo, KERNEL)
 	@$(call touch)
 
 # ----------------------------------------------------------------------------
@@ -294,6 +299,10 @@ ifdef PTXCONF_KERNEL_INSTALL
 	@$(foreach dtb, $(KERNEL_DTB_FILES), \
 		$(call install_copy, kernel, 0, 0, 0644, -, \
 			/boot/$(dtb), n)$(ptx/nl))
+
+	@$(foreach dtbo, $(KERNEL_DTBO_FILES), \
+		$(call install_copy, kernel, 0, 0, 0644, -, \
+			$(KERNEL_DTBO_DIR)/$(dtbo), n)$(ptx/nl))
 endif
 
 # install the ELF kernel image for debugging purpose
-- 
2.30.2


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Re: [ptxdist] [APPLIED] ptxd_make_world_{dtb, dtbo}: add support for device tree overlays

[Michael Olbrich]

Thanks, applied as 2fafa7c4308db8d1e79dc3b5d2c9cb3400a16ff8.

Michael

[sent from post-receive hook]

On Fri, 10 Dec 2021 14:07:26 +0100, Michael Riesch <michael.riesch@wolfvision.net> wrote:
> Make ptxd_make_dtb more general and provide suitable wrappers to
> support the generation of device tree overlays.
> 
> Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
> Message-Id: <20211209110258.3307503-2-michael.riesch@wolfvision.net>
> Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
> 
> diff --git a/rules/post/ptxd_make_world_dtbo.make b/rules/post/ptxd_make_world_dtbo.make
> new file mode 100644
> index 000000000000..61babc653660
> --- /dev/null
> +++ b/rules/post/ptxd_make_world_dtbo.make
> @@ -0,0 +1,21 @@
> +# -*-makefile-*-
> +#
> +# Copyright (C) 2020 by Michael Tretter <m.tretter@pengutronix.de>
> +#
> +# For further information about the PTXdist project and license conditions
> +# see the README file.
> +#
> +
> +world/dtbo/env = \
> +	$(call world/env, $(1)) \
> +	pkg_dtso_path="$($(1)_DTSO_PATH)" \
> +	pkg_dtso="$($(1)_DTSO)" \
> +	pkg_dtbo_dir="$($(1)_DTBO_DIR)" \
> +	pkg_kernel_src="$($(1)_KERNEL_DIR)" \
> +	pkg_arch="$(GENERIC_KERNEL_ARCH)"
> +
> +world/dtbo = \
> +	$(call world/dtbo/env,$(strip $(1))) \
> +	ptxd_make_world_dtbo
> +
> +# vim: syntax=make
> diff --git a/scripts/lib/ptxd_make_world_dtb.sh b/scripts/lib/ptxd_make_world_dtb.sh
> index f5e796b9d13d..f78d2f885114 100644
> --- a/scripts/lib/ptxd_make_world_dtb.sh
> +++ b/scripts/lib/ptxd_make_world_dtb.sh
> @@ -7,24 +7,22 @@
>  #
>  
>  ptxd_make_dtb() {
> -    local dtc dts tmp_dts dtb deps tmp_deps
> +    local dtc dts tmp_dts dtb dtb_extra_args dtb_kernel_dir deps tmp_deps
>  
> -    if [[ "${dts_dts}" =~ ^/.* ]]; then
> -	ptxd_bailout "'${dts_dts}' must not be an absolute path!" \
> -	    "Use <PKG>_DTS_PATH to specify the search path."
> -    fi
> +    dts="${dtb_source}"
> +    dtb="${dtb_target}"
>  
> -    if ! ptxd_in_path pkg_dts_path "${dts_dts}"; then
> -	ptxd_bailout "Device-tree '${dts_dts}' not found in '${pkg_dts_path}'."
> -    fi
> -    dts="${ptxd_reply}"
> -    dtb="${dtb_dir}/$(basename ${dts/%.dts/.dtb})"
> +    dtb_kernel_dir="${pkg_kernel_src:-${pkg_dir}}"
>  
> -    dtc="${pkg_build_dir}/scripts/dtc/dtc"
> +    dtc="${dtb_kernel_dir}/scripts/dtc/dtc"
>      if [ ! -x "${dtc}" ]; then
>  	dtc=dtc
>      fi
>  
> +    if [ "$(ptxd_get_ptxconf PTXCONF_KERNEL_DTS_SUPPORT_OVERLAYS)" == "y" ]; then
> +	dtb_extra_args="-@"
> +    fi
> +
>      tmp_dts="${ptx_state_dir}/${pkg_label}.$(basename "${dts}").tmp"
>  
>      deps="${ptx_state_dir}/${pkg_label}.$(basename "${dts}").deps"
> @@ -39,16 +37,16 @@ ptxd_make_dtb() {
>  	-Wp,-MT,${dtb_deps_target} \
>  	-nostdinc \
>  	-I"$(dirname "${dts}")" \
> -	-I${pkg_dir}/arch/${pkg_arch}/boot/dts \
> -	-I${pkg_dir}/arch/${pkg_arch}/boot/dts/include \
> -	-I${pkg_dir}/scripts/dtc/include-prefixes \
> -	-I${pkg_dir}/drivers/of/testcase-data \
> -	-I${pkg_dir}/include \
> +	-I${dtb_kernel_dir}/arch/${pkg_arch}/boot/dts \
> +	-I${dtb_kernel_dir}/arch/${pkg_arch}/boot/dts/include \
> +	-I${dtb_kernel_dir}/scripts/dtc/include-prefixes \
> +	-I${dtb_kernel_dir}/drivers/of/testcase-data \
> +	-I${dtb_kernel_dir}/include \
>  	-undef -D__DTS__ -x assembler-with-cpp \
>  	-o ${tmp_dts} \
>  	${dts} &&
>  
> -    sed -e "\;^ ${pkg_dir}[^ ]*;d" \
> +    sed -e "\;^ ${dtb_kernel_dir}[^ ]*;d" \
>  	-e 's;^ \([^ \]*\); $(wildcard \1);' "${tmp_deps}" > "${deps}" &&
>      # empty line in case all dependencies were removed
>      echo >> "${deps}" &&
> @@ -57,9 +55,9 @@ ptxd_make_dtb() {
>      echo "DTC $(ptxd_print_path "${dtb}")" &&
>      ptxd_eval \
>  	"${dtc}" \
> -	$(ptxd_get_ptxconf PTXCONF_DTC_EXTRA_ARGS) \
> +	"${dtb_extra_args}" \
>  	-i "$(dirname "${dts}")" \
> -	-i "${pkg_dir}/arch/${pkg_arch}/boot/dts" \
> +	-i "${dtb_kernel_dir}/arch/${pkg_arch}/boot/dts" \
>  	-d "${tmp_deps}" \
>  	-I dts -O dtb -b 0 \
>  	-o "${dtb}" "${tmp_dts}" &&
> @@ -81,17 +79,54 @@ ptxd_make_dtb() {
>  export -f ptxd_make_dtb
>  
>  
> +ptxd_make_world_dtbo() {
> +    local dtb_deps_target dtb_source dtb_target
> +
> +    ptxd_make_world_init || break
> +
> +    dtb_deps_target="${ptx_state_dir}/${pkg_stamp}"
> +
> +    echo -e "\nBuilding device tree overlays..."
> +
> +    for overlay in ${pkg_dtso}; do
> +	if [[ "${overlay}" =~ ^/.* ]]; then
> +	    ptxd_bailout "'${overlay}' must not be an absolute path!" \
> +			 "Use <PKG>_DTSO_PATH to specify the search path."
> +	fi
> +
> +	if ! ptxd_in_path pkg_dtso_path "${overlay}"; then
> +	    ptxd_bailout "Overlay '${overlay}' not found in '${pkg_dtso_path}'."
> +	fi
> +	dtb_source="${ptxd_reply}"
> +	dtb_target="${pkg_pkg_dir}/${pkg_dtbo_dir}/$(basename ${overlay/%.dts*/.dtbo})"
> +
> +	ptxd_make_dtb || break
> +    done
> +}
> +export -f ptxd_make_world_dtbo
> +
> +
>  ptxd_make_world_dtb() {
> -    local dtb_deps_target dtb_dir
> +    local dtb_deps_target dtb_source dtb_target
>  
>      ptxd_make_world_init || break
>  
>      dtb_deps_target="${ptx_state_dir}/${pkg_stamp}"
> -    dtb_dir="${pkg_pkg_dir}/boot"
>  
> -    echo -e "\nBuilding Device trees..."
> +    echo -e "\nBuilding device trees..."
>  
>      for dts_dts in ${pkg_dts}; do
> +	if [[ "${dts_dts}" =~ ^/.* ]]; then
> +	    ptxd_bailout "'${dts_dts}' must not be an absolute path!" \
> +			 "Use <PKG>_DTS_PATH to specify the search path."
> +	fi
> +
> +	if ! ptxd_in_path pkg_dts_path "${dts_dts}"; then
> +	    ptxd_bailout "Device tree '${dts_dts}' not found in '${pkg_dts_path}'."
> +	fi
> +	dtb_source="${ptxd_reply}"
> +	dtb_target="${pkg_pkg_dir}/boot/$(basename ${dts_dts/%.dts/.dtb})"
> +
>  	ptxd_make_dtb || break
>      done
>  }

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Re: [ptxdist] [APPLIED] kernel: activate support for device tree overlays

[Michael Olbrich]

Thanks, applied as e825644b85e9e8c9be99784c3edf3d63ab32bcec.

Michael

[sent from post-receive hook]

On Fri, 10 Dec 2021 14:07:28 +0100, Michael Riesch <michael.riesch@wolfvision.net> wrote:
> Activate the recently introduced support for device tree overlays
> for the kernel package.
> 
> Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
> Message-Id: <20211209110258.3307503-3-michael.riesch@wolfvision.net>
> Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
> 
> diff --git a/platforms/kernel.in b/platforms/kernel.in
> index 9976436ce0a2..9f355f5dc026 100644
> --- a/platforms/kernel.in
> +++ b/platforms/kernel.in
> @@ -186,7 +186,7 @@ config KERNEL_DTS_PATH
>  	help
>  	  Define path to the dts source file. Multiple directories can be
>  	  specified separated by ':'. A relative path will be expanded relative
> -	  to the workspace and all other layers. Only on of the specified paths
> +	  to the workspace and all other layers. Only one of the specified paths
>  	  can be a relative path.
>  
>  config KERNEL_DTS
> @@ -198,6 +198,36 @@ config KERNEL_DTS
>  	  is used as a search path for the device tree files specified
>  	  here. Multiple dts files can be specified, separated by spaces.
>  
> +config KERNEL_DTS_SUPPORT_OVERLAYS
> +	bool
> +
> +endif
> +
> +menuconfig KERNEL_DTBO
> +	bool
> +	select KERNEL_DTS_SUPPORT_OVERLAYS
> +	prompt "Build device tree overlays    "
> +
> +if KERNEL_DTBO
> +
> +config KERNEL_DTSO_PATH
> +	string "path to overlay file(s)"
> +	default "${PTXDIST_PLATFORMCONFIG_SUBDIR}/dts/overlays:${KERNEL_DIR}/arch/${GENERIC_KERNEL_ARCH}/boot/dts"
> +	help
> +	  Define path to the dts(o) source file(s). Multiple directories can be
> +	  specified separated by ':'. A relative path will be expanded relative
> +	  to the workspace and all other layers. Only one of the specified paths
> +	  can be a relative path.
> +
> +config KERNEL_DTSO
> +	string "overlay file(s)"
> +	default "<youroverlay>.dtso"
> +	help
> +	  Select the dts(o) file(s) to be compiled. For relative file
> +	  names KERNEL_DTSO_PATH is used as a search path for the device
> +	  tree files specified here.
> +	  Multiple dts(o) files can be specified, separated by spaces.
> +
>  endif
>  
>  config KERNEL_CODE_SIGNING
> diff --git a/rules/kernel.make b/rules/kernel.make
> index 0ecf5f4e986f..1b70faf21dbe 100644
> --- a/rules/kernel.make
> +++ b/rules/kernel.make
> @@ -29,7 +29,11 @@ KERNEL_BUILD_DIR	:= $(KERNEL_DIR)-build
>  KERNEL_CONFIG		:= $(call ptx/in-platformconfigdir, $(call remove_quotes, $(PTXCONF_KERNEL_CONFIG)))
>  KERNEL_DTS_PATH		:= $(call remove_quotes,$(PTXCONF_KERNEL_DTS_PATH))
>  KERNEL_DTS		:= $(call remove_quotes,$(PTXCONF_KERNEL_DTS))
> +KERNEL_DTSO_PATH	:= $(call remove_quotes,$(PTXCONF_KERNEL_DTSO_PATH))
> +KERNEL_DTSO		:= $(call remove_quotes,$(PTXCONF_KERNEL_DTSO))
>  KERNEL_DTB_FILES	:= $(addsuffix .dtb,$(basename $(KERNEL_DTS)))
> +KERNEL_DTBO_FILES	:= $(addsuffix .dtbo,$(basename $(KERNEL_DTSO)))
> +KERNEL_DTBO_DIR		:= /boot/overlays
>  KERNEL_LICENSE		:= GPL-2.0-only
>  KERNEL_SOURCE		:= $(SRCDIR)/$(KERNEL).$(KERNEL_SUFFIX)
>  KERNEL_DEVPKG		:= NO
> @@ -265,6 +269,7 @@ ifdef PTXCONF_KERNEL_MODULES_INSTALL
>  	@$(call world/install, KERNEL)
>  endif
>  	@$(call world/dtb, KERNEL)
> +	@$(call world/dtbo, KERNEL)
>  	@$(call touch)
>  
>  # ----------------------------------------------------------------------------
> @@ -294,6 +299,10 @@ ifdef PTXCONF_KERNEL_INSTALL
>  	@$(foreach dtb, $(KERNEL_DTB_FILES), \
>  		$(call install_copy, kernel, 0, 0, 0644, -, \
>  			/boot/$(dtb), n)$(ptx/nl))
> +
> +	@$(foreach dtbo, $(KERNEL_DTBO_FILES), \
> +		$(call install_copy, kernel, 0, 0, 0644, -, \
> +			$(KERNEL_DTBO_DIR)/$(dtbo), n)$(ptx/nl))
>  endif
>  
>  # install the ELF kernel image for debugging purpose

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