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Masahiro Yamada783e6a72014-09-22 19:59:05 +09001#
2# Device Tree Control
3#
Masahiro Yamada783e6a72014-09-22 19:59:05 +09004
5config SUPPORT_OF_CONTROL
6 bool
7
8menu "Device Tree Control"
Masahiro Yamada783e6a72014-09-22 19:59:05 +09009 depends on SUPPORT_OF_CONTROL
10
11config 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
Masahiro Yamadadffb86e2015-08-12 07:31:54 +090017config SPL_OF_CONTROL
18 bool "Enable run-time configuration via Device Tree in SPL"
19 depends on SPL && OF_CONTROL
Simon Glass2860f032015-02-27 22:06:38 -070020 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
Masahiro Yamada783e6a72014-09-22 19:59:05 +090025choice
26 prompt "Provider of DTB for DT control"
27 depends on OF_CONTROL
28
29config 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
36config 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
40 built into the U-Boot image.
41
42config OF_HOSTFILE
43 bool "Host filed DTB for DT control"
44 depends on SANDBOX
45 help
46 If this option is enabled, DTB will be read from a file on startup.
47 This is only useful for Sandbox. Use the -d flag to U-Boot to
48 specify the file to read.
49
50endchoice
51
Masahiro Yamadaf1ef2b62014-09-22 19:59:06 +090052config DEFAULT_DEVICE_TREE
53 string "Default Device Tree for DT control"
54 help
55 This option specifies the default Device Tree used for DT control.
Robert P. J. Day5699ea62014-10-21 16:44:32 -040056 It can be overridden from the command line:
Masahiro Yamadaf1ef2b62014-09-22 19:59:06 +090057 $ make DEVICE_TREE=<device-tree-name>
58
Simon Glassfa78e0a2015-06-23 15:38:29 -060059config OF_SPL_REMOVE_PROPS
60 string "List of device tree properties to drop for SPL"
61 depends on OF_CONTROL && SPL
62 default "pinctrl-0 pinctrl-names clocks clock-names interrupt-parent"
63 help
64 Since SPL normally runs in a reduced memory space, the device tree
65 is cut down to only what is needed to load and start U-Boot. Only
66 nodes marked with the property "u-boot,dm-pre-reloc" will be
67 included. In addition, some properties are not used by U-Boot and
68 can be discarded. This option defines the list of properties to
69 discard.
70
Masahiro Yamada783e6a72014-09-22 19:59:05 +090071endmenu