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boot/uboot: add option to pass custom variables to U-Boot build

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U-Boot supports a number of environment variables to pass specific
information. The following patches were submitted in the past to one
some specific Config.in option to pass some of these variables:

 - http://patchwork.ozlabs.org/patch/881197/ proposed an option to
   pass a custom EXT_DTB= variable

 - http://patchwork.ozlabs.org/patch/1018245/ proposed an option to
   pass a custom DEVICE_TREE= variable

Instead of adding one Config.in option for each of those variables,
let's provide a generic mechanism to pass arbitrary variables during
U-Boot build step.

Cc: Konstantin Porotchkin <kostap@marvell.com>
Cc: Clemens Gruber <clemens.gruber@pqgruber.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni 2019-04-26 17:19:46 +02:00 committed by Peter Korsgaard
parent ea69166b88
commit cc151c3993
2 changed files with 8 additions and 1 deletions
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6
boot/uboot/Config.in
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@ -552,4 +552,10 @@ config BR2_TARGET_UBOOT_CUSTOM_DTS_PATH
endif
config BR2_TARGET_UBOOT_CUSTOM_MAKEOPTS
string "Custom make options"
help
List of custom make options passed at build time. Can be
used for example to pass a DEVICE_TREE= value.
endif # BR2_TARGET_UBOOT

3
boot/uboot/uboot.mk
View File

@ -133,7 +133,8 @@ UBOOT_MAKE_OPTS += \
CROSS_COMPILE="$(TARGET_CROSS)" \
ARCH=$(UBOOT_ARCH) \
HOSTCC="$(HOSTCC) $(subst -I/,-isystem /,$(subst -I /,-isystem /,$(HOST_CFLAGS)))" \
HOSTLDFLAGS="$(HOST_LDFLAGS)"
HOSTLDFLAGS="$(HOST_LDFLAGS)" \
$(call qstrip,$(BR2_TARGET_UBOOT_CUSTOM_MAKEOPTS))
ifeq ($(BR2_TARGET_UBOOT_NEEDS_ATF_BL31),y)
UBOOT_DEPENDENCIES += arm-trusted-firmware