drivers/core/Kconfig

   1 config DM
   2         bool "Enable Driver Model"
   3         help
   4           This config option enables Driver Model. This brings in the core
   5           support, including scanning of platform data on start-up. If
   6           CONFIG_OF_CONTROL is enabled, the device tree will be scanned also
   7           when available.
   8
   9 config SPL_DM
  10         bool "Enable Driver Model for SPL"
  11         depends on DM && SPL
  12         help
  13           Enable driver model in SPL. You will need to provide a
  14           suitable malloc() implementation. If you are not using the
  15           full malloc() enabled by CONFIG_SYS_SPL_MALLOC_START,
  16           consider using CONFIG_SYS_MALLOC_SIMPLE. In that case you
  17           must provide CONFIG_SYS_MALLOC_F_LEN to set the size.
  18           In most cases driver model will only allocate a few uclasses
  19           and devices in SPL, so 1KB should be enable. See
  20           CONFIG_SYS_MALLOC_F_LEN for more details on how to enable it.
  21
  22 config DM_WARN
  23         bool "Enable warnings in driver model"
  24         depends on DM
  25         default y
  26         help
  27           The dm_warn() function can use up quite a bit of space for its
  28           strings. By default this is disabled for SPL builds to save space.
  29           This will cause dm_warn() to be compiled out - it will do nothing
  30           when called.
  31
  32 config DM_DEVICE_REMOVE
  33         bool "Support device removal"
  34         depends on DM
  35         default y
  36         help
  37           We can save some code space by dropping support for removing a
  38           device. This is not normally required in SPL, so by default this
  39           option is disabled for SPL.
  40
  41           Note that this may have undesirable results in the USB subsystem as
  42           it causes unplugged devices to linger around in the dm-tree, and it
  43           causes USB host controllers to not be stopped when booting the OS.
  44
  45 config DM_STDIO
  46         bool "Support stdio registration"
  47         depends on DM
  48         default y
  49         help
  50           Normally serial drivers register with stdio so that they can be used
  51           as normal output devices. In SPL we don't normally use stdio, so
  52           we can omit this feature.
  53
  54 config DM_SEQ_ALIAS
  55         bool "Support numbered aliases in device tree"
  56         depends on DM
  57         default y
  58         help
  59           Most boards will have a '/aliases' node containing the path to
  60           numbered devices (e.g. serial0 = &serial0). This feature can be
  61           disabled if it is not required, to save code space in SPL.