spl: add a 'return to bootrom' boot method
Some devices (e.g. the RK3368) have only limited SRAM, but provide
support for loading the next boot stage after our SPL performs basic
setup (e.g. DRAM).
For target systems like these, we add a boot device BOOTROM that will
invoke a board-specific hook to return to the bootrom (if supported).
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/Makefile b/common/spl/Makefile
index 47a64dd..189b272 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -10,6 +10,7 @@
ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_SPL_FRAMEWORK) += spl.o
+obj-$(CONFIG_SPL_BOOTROM_SUPPORT) += spl_bootrom.o
obj-$(CONFIG_SPL_LOAD_FIT) += spl_fit.o
obj-$(CONFIG_SPL_NOR_SUPPORT) += spl_nor.o
obj-$(CONFIG_SPL_XIP_SUPPORT) += spl_xip.o