| # | |
| # Device Tree Control | |
| # | |
| config SUPPORT_OF_CONTROL | |
| bool | |
| menu "Device Tree Control" | |
| depends on SUPPORT_OF_CONTROL | |
| config OF_CONTROL | |
| bool "Run-time configuration via Device Tree" | |
| help | |
| 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 | |
| config OF_SEPARATE | |
| bool "Separate DTB for DT control" | |
| depends on !SANDBOX | |
| help | |
| If this option is enabled, the device tree will be built and | |
| placed as a separate u-boot.dtb file alongside the U-Boot image. | |
| config OF_EMBED | |
| bool "Embedded DTB for DT control" | |
| help | |
| If this option is enabled, the device tree will be picked up and | |
| built into the U-Boot image. This is suitable for local debugging | |
| and development only and is not recommended for production devices. | |
| Boards in the mainline U-Boot tree should not use it. | |
| config OF_HOSTFILE | |
| bool "Host filed DTB for DT control" | |
| depends on SANDBOX | |
| help | |
| If this option is enabled, DTB will be read from a file on startup. | |
| This is only useful for Sandbox. Use the -d flag to U-Boot to | |
| specify the file to read. | |
| endchoice | |
| config DEFAULT_DEVICE_TREE | |
| string "Default Device Tree for DT control" | |
| help | |
| This option specifies the default Device Tree used for DT 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 "clocks clock-names interrupt-parent" if SPL_PINCTRL_FULL | |
| 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 |