boot/arm-trusted-firmware: allow to generate BL2 from RCW

This patch adds the option BR2_TARGET_ARM_TRUSTED_FIRMWARE_RCW that
allows TF-A to encapsulate a pre-loaded RCW (Reset Configuration Word)
file into BL2.

Upcoming NXP QorIQ family board needs this option.

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

boot/arm-trusted-firmware/Config.in

@@ -162,6 +162,14 @@ config BR2_TARGET_ARM_TRUSTED_FIRMWARE_EDK2_AS_BL33
 	  for the 'qemu_sbsa' platform. In this case, due to the EDK2
 	  build system, the dependency between ATF and EDK is reversed.
 
+config BR2_TARGET_ARM_TRUSTED_FIRMWARE_RCW
+	bool "Include NXP RCW in BL2"
+	depends on BR2_PACKAGE_HOST_QORIQ_RCW
+	help
+	  Include the NXP RCW (Reset Control Word) in BL2. See
+	  package/qoriq-rcw/ for more details. This is mostly useful
+	  on NXP LayerScape platforms.
+
 config BR2_TARGET_ARM_TRUSTED_FIRMWARE_ADDITIONAL_TARGETS
 	string "Additional ATF make targets"
 	help

boot/arm-trusted-firmware/arm-trusted-firmware.mk

@@ -144,6 +144,12 @@ define ARM_TRUSTED_FIRMWARE_BUILD_FIPTOOL
 endef
 endif
 
+ifeq ($(BR2_TARGET_ARM_TRUSTED_FIRMWARE_RCW),y)
+ARM_TRUSTED_FIRMWARE_DEPENDENCIES += host-qoriq-rcw
+ARM_TRUSTED_FIRMWARE_MAKE_TARGETS += pbl
+ARM_TRUSTED_FIRMWARE_MAKE_OPTS += RCW=$(BINARIES_DIR)/PBL.bin
+endif
+
 ifeq ($(BR2_TARGET_ARM_TRUSTED_FIRMWARE_BL31),y)
 ARM_TRUSTED_FIRMWARE_MAKE_TARGETS += bl31
 endif