[Buildroot] [PATCH v4 1/8] boot/optee-os: add option to select DTC dependency

["Clément Léger via buildroot" <buildroot@buildroot.org>]

Some platforms (stm32, sam) needs DTC to build the platform
device-trees. Add BR2_TARGET_OPTEE_OS_NEEDS_DTC configuration
option to select host-dtc package when building.

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
---
 boot/optee-os/Config.in   | 7 +++++++
 boot/optee-os/optee-os.mk | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/boot/optee-os/Config.in b/boot/optee-os/Config.in
index 0974578484..2f6143f1f4 100644
--- a/boot/optee-os/Config.in
+++ b/boot/optee-os/Config.in
@@ -48,6 +48,13 @@ config BR2_TARGET_OPTEE_OS_CUSTOM_REPO_VERSION
 
 endif
 
+config BR2_TARGET_OPTEE_OS_NEEDS_DTC
+	bool "OP-TEE OS needs dtc"
+	select BR2_PACKAGE_HOST_DTC
+	help
+	  Select this option if your OP-TEE OS platform configuration
+	  requires the Device Tree compiler to be available.
+
 config BR2_TARGET_OPTEE_OS_VERSION
 	string
 	default "3.15.0"	if BR2_TARGET_OPTEE_OS_LATEST
diff --git a/boot/optee-os/optee-os.mk b/boot/optee-os/optee-os.mk
index 166b5e693c..9f76d8450e 100644
--- a/boot/optee-os/optee-os.mk
+++ b/boot/optee-os/optee-os.mk
@@ -23,6 +23,10 @@ endif
 
 OPTEE_OS_DEPENDENCIES = host-openssl host-python3 host-python-pycryptodomex host-python-pyelftools
 
+ifeq ($(BR2_TARGET_OPTEE_OS_NEEDS_DTC),y)
+OPTEE_OS_DEPENDENCIES += host-dtc
+endif
+
 # On 64bit targets, OP-TEE OS can be built in 32bit mode, or
 # can be built in 64bit mode and support 32bit and 64bit
 # trusted applications. Since buildroot currently references
-- 
2.34.1

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