#
# Device Tree Control
#
-# TODO:
-# This feature is not currently supported for SPL,
-# but this restriction should be removed in the future.
config SUPPORT_OF_CONTROL
bool
This feature provides for run-time configuration of U-Boot
via a flattened device tree.
+config SPL_OF_CONTROL
+ bool "Enable run-time configuration via Device Tree in SPL"
+ depends on SPL && OF_CONTROL
+ help
+ Some boards use device tree in U-Boot but only have 4KB of SRAM
+ which is not enough to support device tree. Enable this option to
+ allow such boards to be supported by U-Boot SPL.
+
choice
prompt "Provider of DTB for DT control"
depends on OF_CONTROL
It can be overridden from the command line:
$ make DEVICE_TREE=<device-tree-name>
+config OF_SPL_REMOVE_PROPS
+ string "List of device tree properties to drop for SPL"
+ depends on SPL_OF_CONTROL
+ default "pinctrl-0 pinctrl-names clocks clock-names interrupt-parent"
+ help
+ Since SPL normally runs in a reduced memory space, the device tree
+ is cut down to only what is needed to load and start U-Boot. Only
+ nodes marked with the property "u-boot,dm-pre-reloc" will be
+ included. In addition, some properties are not used by U-Boot and
+ can be discarded. This option defines the list of properties to
+ discard.
+
endmenu