diff options
Diffstat (limited to 'common/build.mk')
| -rw-r--r-- | common/build.mk | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/common/build.mk b/common/build.mk index 0e0b8ff66e..f775fee0da 100644 --- a/common/build.mk +++ b/common/build.mk @@ -148,3 +148,25 @@ ifneq ($(CONFIG_RSA_OPTIMIZED),) $(out)/RW/common/rsa.o: CFLAGS+=-O3 $(out)/RO/common/rsa.o: CFLAGS+=-O3 endif + +ifneq ($(CONFIG_TOUCHPAD_HASH_FW),) +$(out)/RO/common/update_fw.o: $(out)/touchpad_fw_hash.h +$(out)/RW/common/update_fw.o: $(out)/touchpad_fw_hash.h + +$(out)/touchpad_fw_hash.h: $(out)/util/gen_touchpad_hash $(out)/.touchpad_fw + $(call quiet,tp_hash,TPHASH ) + +# We only want to recompute the hash if: $(TOUCHPAD_FW) variable value has +# changed, or the file pointed at by $(TOUCHPAD_FW) has changed. We do this +# by recording the latest $(TOUCHPAD_FW) file information in .touchpad_fw. + +touchpad_fw_ls := $(shell ls -l "$(TOUCHPAD_FW)" 2>&1) +old_touchpad_fw_ls := $(shell cat $(out)/.touchpad_fw 2>/dev/null) + +$(out)/.touchpad_fw: $(TOUCHPAD_FW) + @echo "$(touchpad_fw_ls)" > $@ + +ifneq ($(touchpad_fw_ls),$(old_touchpad_fw_ls)) +.PHONY: $(out)/.touchpad_fw +endif +endif |