boot/uboot: compute CRC on SPLs for Altera SoC FPGA

Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
[Thomas: add Altera in the option name and description, drop reference
to Go being needed and to Maxime Hadjinlian's version of mkpimage
since a C version is now used.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

boot/uboot/Config.in

@@ -326,6 +326,14 @@ config BR2_TARGET_UBOOT_ZYNQ_IMAGE
 	  for u-boot-dtb.img file so this U-Boot format is required
 	  to be set.
 
+config BR2_TARGET_UBOOT_ALTERA_SOCFPGA_IMAGE_CRC
+	bool "CRC SPL image for Altera SoC FPGA"
+	depends on BR2_arm
+	depends on BR2_TARGET_UBOOT_SPL
+	help
+	  Generate SPL image fixed by the mkpimage tool to enable
+	  booting on the Altera SoC FPGA based platforms.
+
 menuconfig BR2_TARGET_UBOOT_ENVIMAGE
 	bool "Environment image"
 	help

boot/uboot/uboot.mk

@@ -194,6 +194,15 @@ UBOOT_DEPENDENCIES += host-zynq-boot-bin
 UBOOT_POST_INSTALL_IMAGES_HOOKS += UBOOT_GENERATE_ZYNQ_IMAGE
 endif
 
+ifeq ($(BR2_TARGET_UBOOT_ALTERA_SOCFPGA_IMAGE_CRC),y)
+define UBOOT_CRC_ALTERA_SOCFPGA_IMAGE
+	$(HOST_DIR)/usr/bin/mkpimage -o $(BINARIES_DIR)/$(notdir $(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME))).crc \
+		$(@D)/$(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME))
+endef
+UBOOT_DEPENDENCIES += host-mkpimage
+UBOOT_POST_INSTALL_IMAGES_HOOKS += UBOOT_CRC_ALTERA_SOCFPGA_IMAGE
+endif
+
 ifeq ($(BR2_TARGET_UBOOT_ENVIMAGE),y)
 ifeq ($(BR_BUILDING),y)
 ifeq ($(call qstrip,$(BR2_TARGET_UBOOT_ENVIMAGE_SOURCE)),)