arm: mxs: Preprocess u-boot.bd so they contain full path

The u-boot-imx23.bd and u-boot-imx28.bd need to be preprocessed, otherwise
they have issues with out-of-tree build where elftosb tool couldn't sometimes
find the u-boot.bin and spl/u-boot-spl.bin .

Preprocess these .bd files with sed and insert full path to u-boot.bin and
spl/u-boot-spl.bin to prevent this issue. Moreover, to avoid adding more
churn into main Makefile, move all this preprocessing and u-boot.sb generation
into CPU directory instead.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Otavio Salvador <otavio@ossystems.com.br>

.gitignore

@@ -46,6 +46,7 @@
 /u-boot.ais
 /u-boot.dtb
 /u-boot.sb
+/u-boot.bd
 /u-boot.geany
 
 #

Makefile

@@ -512,13 +512,9 @@ $(obj)u-boot.ais:       $(obj)spl/u-boot-spl.bin $(obj)u-boot.img
 		cat $(obj)spl/u-boot-spl-pad.ais $(obj)u-boot.img > \
 			$(obj)u-boot.ais
 
-# Specify the target for use in elftosb call
-ELFTOSB_TARGET-$(CONFIG_MX23) = imx23
-ELFTOSB_TARGET-$(CONFIG_MX28) = imx28
 
 $(obj)u-boot.sb:       $(obj)u-boot.bin $(obj)spl/u-boot-spl.bin
-		elftosb -zf $(ELFTOSB_TARGET-y) -c $(TOPDIR)/$(CPUDIR)/$(SOC)/u-boot-$(ELFTOSB_TARGET-y).bd \
-			-o $(obj)u-boot.sb
+		$(MAKE) -C $(SRCTREE)/$(CPUDIR)/$(SOC)/ $(OBJTREE)/u-boot.sb
 
 # On x600 (SPEAr600) U-Boot is appended to U-Boot SPL.
 # Both images are created using mkimage (crc etc), so that the ROM
@@ -849,6 +845,7 @@ clobber:	tidy
 	@rm -f $(obj)u-boot.ais
 	@rm -f $(obj)u-boot.dtb
 	@rm -f $(obj)u-boot.sb
+	@rm -f $(obj)u-boot.bd
 	@rm -f $(obj)u-boot.spr
 	@rm -f $(obj)nand_spl/{u-boot.{lds,lst},System.map}
 	@rm -f $(obj)nand_spl/{u-boot-nand_spl.lds,u-boot-spl,u-boot-spl.map}

arch/arm/cpu/arm926ejs/mxs/Makefile

@@ -40,6 +40,16 @@ all:	$(obj).depend $(LIB)
 $(LIB):	$(OBJS)
 	$(call cmd_link_o_target, $(OBJS))
 
+# Specify the target for use in elftosb call
+ELFTOSB_TARGET-$(CONFIG_MX23) = imx23
+ELFTOSB_TARGET-$(CONFIG_MX28) = imx28
+
+$(OBJTREE)/u-boot.bd: $(SRCTREE)/$(CPUDIR)/$(SOC)/u-boot-$(ELFTOSB_TARGET-y).bd
+	sed "s@OBJTREE@$(OBJTREE)@g" $^ > $@
+
+$(OBJTREE)/u-boot.sb: $(OBJTREE)/u-boot.bin $(OBJTREE)/spl/u-boot-spl.bin $(OBJTREE)/u-boot.bd
+		elftosb -zf $(ELFTOSB_TARGET-y) -c $(OBJTREE)/u-boot.bd -o $(OBJTREE)/u-boot.sb
+
 #########################################################################
 
 # defines $(obj).depend target

arch/arm/cpu/arm926ejs/mxs/u-boot-imx23.bd

@@ -4,8 +4,8 @@ options {
 }
 
 sources {
-	u_boot_spl="spl/u-boot-spl.bin";
-	u_boot="u-boot.bin";
+	u_boot_spl="OBJTREE/spl/u-boot-spl.bin";
+	u_boot="OBJTREE/u-boot.bin";
 }
 
 section (0) {

arch/arm/cpu/arm926ejs/mxs/u-boot-imx28.bd

@@ -1,6 +1,6 @@
 sources {
-	u_boot_spl="spl/u-boot-spl.bin";
-	u_boot="u-boot.bin";
+	u_boot_spl="OBJTREE/spl/u-boot-spl.bin";
+	u_boot="OBJTREE/u-boot.bin";
 }
 
 section (0) {