[PATCH 1/2] dts: add property removal option CONFIG_OF_REMOVE_PROPS

[Anatolij Gustschin]

This can be used for device tree size reduction similar as
CONFIG_OF_SPL_REMOVE_PROPS option. For tbs2910 board this
shrinks the image size: all -2304.0 bss -16.0 text -2288.0

Signed-off-by: Anatolij Gustschin <agust at denx.de>
---
 dts/Kconfig          | 8 ++++++++
 scripts/Makefile.lib | 3 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/dts/Kconfig b/dts/Kconfig
index 64c98dd723..49224bee93 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -311,6 +311,14 @@ config OF_SPL_REMOVE_PROPS
 	  can be discarded. This option defines the list of properties to
 	  discard.
 
+config OF_REMOVE_PROPS
+	string "List of device tree properties to drop"
+	depends on OF_CONTROL
+	default "interrupt-parent interrupts" if PINCTRL
+	help
+	  Some properties are not used by U-Boot and can be discarded.
+	  This option defines the list of properties to discard.
+
 config SPL_OF_PLATDATA
 	bool "Generate platform data for use in SPL"
 	depends on SPL_OF_CONTROL
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 4ea898a421..3b124369ad 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -235,7 +235,8 @@ $(obj)/%.tab.h: $(src)/%.y FORCE
 # ===========================================================================
 
 quiet_cmd_shipped = SHIPPED $@
-cmd_shipped = cat $< > $@
+cmd_shipped = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@	\
+		$(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS)))
 
 $(obj)/%: $(src)/%_shipped
 	$(call cmd,shipped)
-- 
2.17.1