initial buildroot for linux 5.15

package/sunxi-boards/Config.in

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+config BR2_PACKAGE_SUNXI_BOARDS
+	bool "sunxi script.bin board file"
+	depends on BR2_arm
+	depends on BR2_HOST_GCC_AT_LEAST_4_9 # host-sunxi-tools
+	select BR2_PACKAGE_HOST_SUNXI_TOOLS
+	help
+	  Sunxi-boards requires a compiled .fex files for hardware
+	  description, used by the kernel during boot for hardware
+	  initialization. This package is specific for linux-sunxi
+	  kernel and it is useless for mainline kernel versions.
+
+	  https://github.com/linux-sunxi/sunxi-boards
+
+if BR2_PACKAGE_SUNXI_BOARDS
+config BR2_PACKAGE_SUNXI_BOARDS_FEX_FILE
+	string ".fex file to compile"
+	help
+	  This field defines the name of the .fex file for which the
+	  .bin file should be generated.
+
+	  This should be the path of the .fex file relative to the
+	  sys_config/ directory, and including the .fex extension.
+
+	  See inside sys_config/ directory in sunxi-boards source code
+	  to see the list of valid .fex files.
+endif
+
+comment "sunxi script.bin board file needs a toolchain w/ host gcc >= 4.9"
+	depends on BR2_arm
+	depends on !BR2_HOST_GCC_AT_LEAST_4_9

package/sunxi-boards/sunxi-boards.hash

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+# locally computed
+sha256  ff1fa509fd5716d26c23a82e59300876a848122f745713a610f8f3c47d448064  sunxi-boards-a6a4e94066f4ec6b26fc7060dc453a6bcf26a504.tar.gz

package/sunxi-boards/sunxi-boards.mk

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+################################################################################
+#
+# sunxi-boards
+#
+################################################################################
+
+SUNXI_BOARDS_VERSION = a6a4e94066f4ec6b26fc7060dc453a6bcf26a504
+SUNXI_BOARDS_SITE = $(call github,linux-sunxi,sunxi-boards,$(SUNXI_BOARDS_VERSION))
+SUNXI_BOARDS_DEPENDENCIES = host-sunxi-tools
+SUNXI_BOARDS_INSTALL_IMAGES = YES
+SUNXI_BOARDS_INSTALL_TARGET = NO
+SUNXI_BOARDS_FEX_FILE = $(call qstrip,$(BR2_PACKAGE_SUNXI_BOARDS_FEX_FILE))
+
+define SUNXI_BOARDS_INSTALL_IMAGES_CMDS
+	$(FEX2BIN) $(@D)/sys_config/$(SUNXI_BOARDS_FEX_FILE) \
+		$(BINARIES_DIR)/script.bin
+endef
+
+ifeq ($(BR2_PACKAGE_SUNXI_BOARDS)$(BR_BUILDING),yy)
+# we NEED a board name
+ifeq ($(SUNXI_BOARDS_FEX_FILE),)
+$(error No sunxi .fex file specified. Check your BR2_PACKAGE_SUNXI_BOARDS_FEX_FILE settings)
+endif
+endif
+
+$(eval $(generic-package))