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authorAnatolij Gustschin <agust@denx.de>2020-01-12 15:57:42 +0100
committerTom Rini <trini@konsulko.com>2020-01-27 19:54:20 -0500
commit43b6e38b27a19f3d193ecf60d62091ab3f737a3e (patch)
tree261a45882c280a24f16b7cd0e5e8877d2c69a0e0 /dts
parent051e03c0d76b7ce9d4649f76f5be979d8f88e765 (diff)
downloadu-boot-43b6e38b27a19f3d193ecf60d62091ab3f737a3e.tar.gz
dts: add property removal option CONFIG_OF_REMOVE_PROPS
This can be used for device tree size reduction similar as CONFIG_OF_SPL_REMOVE_PROPS option. Some boards must pass the built-in DTB unchanged to the kernel, thus we may not cut it down unconditionally. Therefore enable the property removal list option only if CONFIG_OF_DTB_PROPS_REMOVE is selected. Signed-off-by: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'dts')
-rw-r--r--dts/Kconfig20
-rw-r--r--dts/Makefile5
2 files changed, 25 insertions, 0 deletions
diff --git a/dts/Kconfig b/dts/Kconfig
index d3313dd08f..046a54a173 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -314,6 +314,26 @@ config OF_SPL_REMOVE_PROPS
can be discarded. This option defines the list of properties to
discard.
+config OF_DTB_PROPS_REMOVE
+ bool "Enable removal of device tree properties"
+ depends on OF_CONTROL
+ help
+ Some boards have restricted amount of storage for U-Boot image.
+ If the generated binary doesn't fit into available image storage,
+ the built-in device tree could probably be cut down by removing
+ some not required device tree properties to reduce the image size.
+ Enable this option and define the properties to be removed in the
+ CONFIG_OF_REMOVE_PROPS list. Do not enable this option if you must
+ pass the built-in DTB directly to the kernel!
+
+config OF_REMOVE_PROPS
+ string "List of device tree properties to drop"
+ depends on OF_DTB_PROPS_REMOVE
+ 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/dts/Makefile b/dts/Makefile
index 1f83e615e8..a20930eb9a 100644
--- a/dts/Makefile
+++ b/dts/Makefile
@@ -19,8 +19,13 @@ endif
$(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
$(call if_changed,fdtgrep)
+ifeq ($(CONFIG_OF_DTB_PROPS_REMOVE),y)
+$(obj)/dt.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
+ $(call if_changed,fdt_rm_props)
+else
$(obj)/dt.dtb: $(DTB) FORCE
$(call if_changed,shipped)
+endif
targets += dt.dtb dt-spl.dtb