projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 783e6a72 MY |
1 | # |
| 2 | # Device Tree Control | |
| 3 | # | |
| 783e6a72 MY |
4 | |
| 5 | config SUPPORT_OF_CONTROL | |
| 6 | bool | |
| 7 | ||
| 8 | menu "Device Tree Control" | |
| 783e6a72 MY |
9 | depends on SUPPORT_OF_CONTROL |
| 10 | ||
| 11 | config OF_CONTROL | |
| 12 | bool "Run-time configuration via Device Tree" | |
| 13 | help | |
| 14 | This feature provides for run-time configuration of U-Boot | |
| 15 | via a flattened device tree. | |
| 16 | ||
| dffb86e4 MY |
17 | config SPL_OF_CONTROL |
| 18 | bool "Enable run-time configuration via Device Tree in SPL" | |
| 19 | depends on SPL && OF_CONTROL | |
| 2860f03b SG |
20 | help |
| 21 | Some boards use device tree in U-Boot but only have 4KB of SRAM | |
| 22 | which is not enough to support device tree. Enable this option to | |
| 23 | allow such boards to be supported by U-Boot SPL. | |
| 24 | ||
| 783e6a72 MY |
25 | choice |
| 26 | prompt "Provider of DTB for DT control" | |
| 27 | depends on OF_CONTROL | |
| 28 | ||
| 29 | config OF_SEPARATE | |
| 30 | bool "Separate DTB for DT control" | |
| 31 | depends on !SANDBOX | |
| 32 | help | |
| 33 | If this option is enabled, the device tree will be built and | |
| 34 | placed as a separate u-boot.dtb file alongside the U-Boot image. | |
| 35 | ||
| 36 | config OF_EMBED | |
| 37 | bool "Embedded DTB for DT control" | |
| 38 | help | |
| 39 | If this option is enabled, the device tree will be picked up and | |
| 3d3f60cb SG |
40 | built into the U-Boot image. This is suitable for local debugging |
| 41 | and development only and is not recommended for production devices. | |
| 42 | Boards in the mainline U-Boot tree should not use it. | |
| 783e6a72 MY |
43 | |
| 44 | config OF_HOSTFILE | |
| 45 | bool "Host filed DTB for DT control" | |
| 46 | depends on SANDBOX | |
| 47 | help | |
| 48 | If this option is enabled, DTB will be read from a file on startup. | |
| 49 | This is only useful for Sandbox. Use the -d flag to U-Boot to | |
| 50 | specify the file to read. | |
| 51 | ||
| 52 | endchoice | |
| 53 | ||
| f1ef2b62 MY |
54 | config DEFAULT_DEVICE_TREE |
| 55 | string "Default Device Tree for DT control" | |
| 70d41093 | 56 | depends on OF_CONTROL |
| f1ef2b62 MY |
57 | help |
| 58 | This option specifies the default Device Tree used for DT control. | |
| 5699ea6d | 59 | It can be overridden from the command line: |
| f1ef2b62 MY |
60 | $ make DEVICE_TREE=<device-tree-name> |
| 61 | ||
| fa78e0a3 SG |
62 | config OF_SPL_REMOVE_PROPS |
| 63 | string "List of device tree properties to drop for SPL" | |
| 897705ec | 64 | depends on SPL_OF_CONTROL |
| 5f3f7b79 | 65 | default "interrupt-parent" if SPL_PINCTRL_FULL && SPL_CLK |
| 6aa8179f | 66 | default "clocks clock-names interrupt-parent" if SPL_PINCTRL_FULL |
| 5f3f7b79 | 67 | default "pinctrl-0 pinctrl-names interrupt-parent" if SPL_CLK |
| fa78e0a3 SG |
68 | default "pinctrl-0 pinctrl-names clocks clock-names interrupt-parent" |
| 69 | help | |
| 70 | Since SPL normally runs in a reduced memory space, the device tree | |
| 71 | is cut down to only what is needed to load and start U-Boot. Only | |
| 72 | nodes marked with the property "u-boot,dm-pre-reloc" will be | |
| 73 | included. In addition, some properties are not used by U-Boot and | |
| 74 | can be discarded. This option defines the list of properties to | |
| 75 | discard. | |
| 76 | ||
| 783e6a72 | 77 | endmenu |