[PATCH 1/2] firmware: export firmware directory

[Sascha Hauer <s.hauer@pengutronix.de>]

The recently added k3r5 code needs firmware blobs as part of the image
generation. It hardcodes the firmware path to $(srctree)/firmware which
is the default, but could changed with CONFIG_EXTRA_FIRMWARE_DIR.

Move setting of $(fwdir) to the toplevel Makefile and export it to make
it available to images/Makefile.k3. As fwdir is a bad name for an
exported variable rename it to FIRMWARE_DIR.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 Makefile          |  6 ++++++
 firmware/Makefile | 14 +++++---------
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/Makefile b/Makefile
index 40d7553dfc..2341625d64 100644
--- a/Makefile
+++ b/Makefile
@@ -515,6 +515,12 @@ export LDFLAGS_barebox LDFLAGS_pbl LDFLAGS_elf
 export CFLAGS_UBSAN
 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE
 
+# Create $(FIRMWARE_DIR) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
+# leading /, it's relative to $(srctree).
+FIRMWARE_DIR := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR))
+FIRMWARE_DIR := $(addprefix $(srctree)/,$(filter-out /%,$(FIRMWARE_DIR)))$(filter /%,$(FIRMWARE_DIR))
+export FIRMWARE_DIR
+
 # Files to ignore in find ... statements
 
 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
diff --git a/firmware/Makefile b/firmware/Makefile
index 2f47e04bee..a3fdaa0f7c 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -42,10 +42,6 @@ fw-external-$(CONFIG_FIRMWARE_LS1046A_ATF) += ls1046a-bl31.bin
 pbl-firmware-$(CONFIG_FIRMWARE_CCBV2_OPTEE) += ccbv2_optee.bin
 pbl-firmware-$(CONFIG_FIRMWARE_TQMA6UL_OPTEE) += mba6ul_optee.bin
 
-# Create $(fwdir) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
-# leading /, it's relative to $(srctree).
-fwdir := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR))
-fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
 fwobjdir := $(objtree)/firmware
 
 pbl-y     := $(addsuffix .gen.o, $(pbl-firmware-y))
@@ -54,7 +50,7 @@ pbl-fwext-y := $(addsuffix .extgen.o, $(fw-external-y))
 
 FWNAME    = $(patsubst $(obj)/%.extgen.S,%,$(patsubst $(obj)/%.gen.S,%,$@))
 FWSTR     = $(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME))))
-FWNAME_EXISTS = $(if $(wildcard $(fwdir)/$(FWNAME)),1,0)
+FWNAME_EXISTS = $(if $(wildcard $(FIRMWARE_DIR)/$(FWNAME)),1,0)
 
 filechk_fwbin = { \
 	echo "/* Generated by $(src)/Makefile */"		;\
@@ -65,7 +61,7 @@ filechk_fwbin = { \
 	echo ".global _fw_$(FWSTR)_start"			;\
 	echo "_fw_$(FWSTR)_start:"				;\
 	echo "\#if $(FWNAME_EXISTS)"				;\
-	echo "    .incbin \"$(fwdir)/$(FWNAME)\""		;\
+	echo "    .incbin \"$(FIRMWARE_DIR)/$(FWNAME)\""		;\
 	echo "\#elif defined(__PBL__)"				;\
 	echo "ASM_PTR _fwname_$(FWSTR)"				;\
 	echo "\#endif"						;\
@@ -103,12 +99,12 @@ $(obj)/%.sha.bin: $(obj)/%.sum FORCE
 	$(call if_changed,sha256bin)
 
 $(obj)/%.sum: FORCE
-	$(if $(wildcard $(fwdir)/$*), $(call if_changed,sha256sum,$(fwdir)/$*), @touch $@)
+	$(if $(wildcard $(FIRMWARE_DIR)/$*), $(call if_changed,sha256sum,$(FIRMWARE_DIR)/$*), @touch $@)
 
 clean-files += *.sha.bin *.sum
 
 # This dependency is used if missing firmware should fail the build immediately
-fwdep-required-y = $(fwdir)/%
+fwdep-required-y = $(FIRMWARE_DIR)/%
 # This dependency expands to nothing if the file doesn't exist. This allows
 # delaying the firmware check:
 #
@@ -117,7 +113,7 @@ fwdep-required-y = $(fwdir)/%
 #
 # This way, we allow users to build defconfigs with multiple images without requiring
 # them to install all firmware for all platforms if only few are of interest.
-fwdep-required-n = $$(wildcard $(fwdir)/%)
+fwdep-required-n = $$(wildcard $(FIRMWARE_DIR)/%)
 
 .SECONDEXPANSION:
 # The .o files depend on the binaries directly if available; the .S files don't.
-- 
2.39.5