Allow deeper platform port directory structure
Update the top level makefile to allow platform ports to exist in
subdirectories at any level instead of one level under `plat/`. The
makefile recursively searches for all files called `platform.mk` in
all subdirectories of `plat/`. The directory containing
`platform.mk` is the platform name. Platform names must be unique
across the codebase.
Replace usage of HELP_PLATFORMS in the Makefile with PLATFORMS since
these are both used to report the same information back to the user.
Update the TSP and cert_create tool makefiles in a similar way
to support a deeper platform port directory structure.
Also add PLAT_<plat_name> as a define passed through the top level
makefile to the source files, to allow build time variation in common
platform code.
Change-Id: I213420164808c5ddb99a26144e8e3f141a7417b7
diff --git a/bl32/tsp/tsp.mk b/bl32/tsp/tsp.mk
index f17ef1e..aeda31a 100644
--- a/bl32/tsp/tsp.mk
+++ b/bl32/tsp/tsp.mk
@@ -52,7 +52,7 @@
# Include the platform-specific TSP Makefile
# If no platform-specific TSP Makefile exists, it means TSP is not supported
# on this platform.
-TSP_PLAT_MAKEFILE := plat/${PLAT}/tsp/tsp-${PLAT}.mk
+TSP_PLAT_MAKEFILE := $(shell find plat/ -wholename '*/${PLAT}/tsp/tsp-${PLAT}.mk')
ifeq (,$(wildcard ${TSP_PLAT_MAKEFILE}))
$(error TSP is not supported on platform ${PLAT})
else