[U-Boot] [RESEND PATCH v4 02/11] Makefile: support building SPL FIT images without device trees

Lukas Auer lukas.auer at aisec.fraunhofer.de
Wed Aug 21 19:14:41 UTC 2019

When building a U-Boot FIT image, the device trees specified by the
board are unconditionally built for inclusion in the FIT image. However,
not all device tree providers, such as CONFIG_OF_PRIOR_STAGE, require a
device tree to be built and bundled with the U-Boot binary. They rely on
other mechanisms to provide the device tree to U-Boot. Compilation on
boards with these device tree providers fails, because they do not
specify a device tree.

Change the makefile rules to conditionally build the device trees if
as device tree provider.

Signed-off-by: Lukas Auer <lukas.auer at aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
Tested-by: Bin Meng <bmeng.cn at gmail.com>
Reviewed-by: Anup Patel <anup.patel at wdc.com>

Changes in v4:
- Also build the device tree if CONFIG_OF_HOSTFILE is selected,
otherwise sandbox_spl is broken

Changes in v3: None
Changes in v2: None

 Makefile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 3b0864ae8e..cf85e8c949 100644
--- a/Makefile
+++ b/Makefile
@@ -1257,7 +1257,9 @@ MKIMAGEFLAGS_u-boot.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \
 		-R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -T pblimage
 u-boot-dtb.img u-boot.img u-boot.kwb u-boot.pbl u-boot-ivt.img: \
-		$(if $(CONFIG_SPL_LOAD_FIT),u-boot-nodtb.bin dts/dt.dtb,u-boot.bin) FORCE
+		$(if $(CONFIG_SPL_LOAD_FIT),u-boot-nodtb.bin \
+		,u-boot.bin) FORCE
 	$(call if_changed,mkimage)
@@ -1267,7 +1269,9 @@ else
 MKIMAGEFLAGS_u-boot.itb = -E
-u-boot.itb: u-boot-nodtb.bin dts/dt.dtb $(U_BOOT_ITS) FORCE
+u-boot.itb: u-boot-nodtb.bin \
 	$(call if_changed,mkfitimage)

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