diff options
| -rw-r--r-- | dts/Kconfig | 20 | ||||
| -rw-r--r-- | dts/Makefile | 5 | ||||
| -rw-r--r-- | scripts/Makefile.lib | 8 |
3 files changed, 33 insertions, 0 deletions
diff --git a/dts/Kconfig b/dts/Kconfig index d3313dd..046a54a 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 1f83e61..a20930e 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 diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 4ea898a..30f392f 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -544,3 +544,11 @@ quiet_cmd_fdtgrep = FDTGREP $@ $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ -P u-boot,dm-pre-reloc -P u-boot,dm-spl -P u-boot,dm-tpl \ $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS))) + +# fdt_rm_props +# --------------------------------------------------------------------------- +# Pass the original device tree file through fdtgrep. This removes various +# unused properties. The output is typically a smaller device tree file. +quiet_cmd_fdt_rm_props = FDTGREP $@ + cmd_fdt_rm_props = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ + $(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS))) |