dts/Kconfig

   1 #
   2 # Device Tree Control
   3 #
   4
   5 config SUPPORT_OF_CONTROL
   6         bool
   7
   8 menu "Device Tree Control"
   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
  17 config SPL_OF_CONTROL
  18         bool "Enable run-time configuration via Device Tree in SPL"
  19         depends on SPL && OF_CONTROL
  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
  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
  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.
  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
  54 config DEFAULT_DEVICE_TREE
  55         string "Default Device Tree for DT control"
  56         depends on OF_CONTROL
  57         help
  58           This option specifies the default Device Tree used for DT control.
  59           It can be overridden from the command line:
  60           $ make DEVICE_TREE=<device-tree-name>
  61
  62 config OF_LIST
  63         string "List of device tree files to include for DT control"
  64         depends on SPL_LOAD_FIT
  65         help
  66           This option specifies a list of device tree files to use for DT
  67           control. These will be packaged into a FIT. At run-time, SPL will
  68           select the correct DT to use by examining the hardware (e.g.
  69           reading a board ID value). This is a list of device tree files
  70           (without the directory or .dtb suffix) separated by <space>.
  71
  72 config OF_SPL_REMOVE_PROPS
  73         string "List of device tree properties to drop for SPL"
  74         depends on SPL_OF_CONTROL
  75         default "interrupt-parent" if SPL_PINCTRL_FULL && SPL_CLK
  76         default "clocks clock-names interrupt-parent" if SPL_PINCTRL_FULL
  77         default "pinctrl-0 pinctrl-names interrupt-parent" if SPL_CLK
  78         default "pinctrl-0 pinctrl-names clocks clock-names interrupt-parent"
  79         help
  80           Since SPL normally runs in a reduced memory space, the device tree
  81           is cut down to only what is needed to load and start U-Boot. Only
  82           nodes marked with the property "u-boot,dm-pre-reloc" will be
  83           included. In addition, some properties are not used by U-Boot and
  84           can be discarded. This option defines the list of properties to
  85           discard.
  86
  87 endmenu