[ptxdist] [PATCH 7/7] u-boot: allow generation of boot script

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

U-Boot can be configured via the environment to look for a boot script
in the rootfs. The boot script can then be used to customize the booting
process further.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 platforms/u-boot.in | 18 ++++++++++++++++++
 rules/u-boot.make   | 21 +++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/platforms/u-boot.in b/platforms/u-boot.in
index 4e19d09c74f5..12ab139e2391 100644
--- a/platforms/u-boot.in
+++ b/platforms/u-boot.in
@@ -62,6 +62,24 @@ config U_BOOT_ENV_FLASH_REDUNDANT
 
 endif
 
+config U_BOOT_BOOT_SCRIPT
+	prompt "Compile U-Boot boot script"
+	bool
+	help
+	  Use U-Boot's mkimage to compile a U-Boot boot script and install it
+	  into the rootfs
+
+if U_BOOT_BOOT_SCRIPT
+
+config U_BOOT_BOOT_SCRIPT_ROOTFS_PATH
+	string
+	default "/boot/uboot.scr"
+	prompt "Installation path"
+	help
+	  Target rootfs path where the U-Boot script should be located
+
+endif
+
 comment "target install"
 
 config U_BOOT_INSTALL_SREC
diff --git a/rules/u-boot.make b/rules/u-boot.make
index 39228dbcaf9c..2f8c60e1809e 100644
--- a/rules/u-boot.make
+++ b/rules/u-boot.make
@@ -2,6 +2,7 @@
 #
 # Copyright (C) 2007 by Sascha Hauer
 #               2009, 2010 by Marc Kleine-Budde <mkl@pengutronix.de>
+#               2018 by Ahmad Fatoum <a.fatoum@pengutronix.de>
 #
 # See CREDITS for details about who has contributed to this project.
 #
@@ -35,6 +36,9 @@ U_BOOT_CONFIG	:= $(call ptx/in-platformconfigdir, \
 
 U_BOOT_ENV_TXT	:= $(call ptx/in-platformconfigdir, uboot-env.txt)
 U_BOOT_ENV_BIN	:= $(IMAGEDIR)/uboot-env.bin
+U_BOOT_BOOT_SCRIPT_TXT := $(call ptx/in-platformconfigdir, uboot.scr)
+U_BOOT_BOOT_SCRIPT_BIN := $(call remove_quotes, \
+	$(PTXCONF_U_BOOT_BOOT_SCRIPT_ROOTFS_PATH))
 
 ifdef PTXCONF_ENDIAN_BIG
 	U_BOOT_ENV_FLAGS += -b
@@ -87,6 +91,11 @@ ifdef PTXCONF_U_BOOT_ENV
 		$(U_BOOT_ENV_FLAGS) -s $(PTXCONF_U_BOOT_ENV_IMAGE_SIZE) \
 		-o $(U_BOOT_DIR)/uboot-env.bin \
 		$(U_BOOT_ENV_TXT)
+endif
+ifdef PTXCONF_U_BOOT_BOOT_SCRIPT
+	@$(U_BOOT_DIR)/tools/mkimage -T script -C none \
+		-d $(U_BOOT_BOOT_SCRIPT_TXT) \
+		$(U_BOOT_DIR)/uboot.scr
 endif
 	@$(call touch)
 
@@ -132,6 +141,18 @@ endif
 
 ifdef PTXCONF_U_BOOT_ENV
 	@install -v -D -m644 $(U_BOOT_DIR)/uboot-env.bin $(U_BOOT_ENV_BIN)
+endif
+ifdef PTXCONF_U_BOOT_BOOT_SCRIPT
+	@$(call install_init, u-boot)
+	@$(call install_fixup, u-boot, PRIORITY, optional)
+	@$(call install_fixup, u-boot, SECTION, base)
+	@$(call install_fixup, u-boot, AUTHOR, "Ahmad Fatoum <afa@pengutronix.de>")
+	@$(call install_fixup, u-boot, DESCRIPTION, "U-Boot boot script")
+
+	@$(call install_copy, u-boot, 0, 0, 0644, \
+		$(U_BOOT_DIR)/uboot.scr, $(U_BOOT_BOOT_SCRIPT_BIN))
+
+	@$(call install_finish, u-boot)
 endif
 	@$(call touch)
 
-- 
2.19.0


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