drivers/core/Kconfig

   1 menu "Generic Driver Options"
   2
   3 config DM
   4         bool "Enable Driver Model"
   5         help
   6           This config option enables Driver Model. This brings in the core
   7           support, including scanning of platform data on start-up. If
   8           CONFIG_OF_CONTROL is enabled, the device tree will be scanned also
   9           when available.
  10
  11 config SPL_DM
  12         bool "Enable Driver Model for SPL"
  13         depends on DM && SPL
  14         help
  15           Enable driver model in SPL. You will need to provide a
  16           suitable malloc() implementation. If you are not using the
  17           full malloc() enabled by CONFIG_SYS_SPL_MALLOC_START,
  18           consider using CONFIG_SYS_MALLOC_SIMPLE. In that case you
  19           must provide CONFIG_SYS_MALLOC_F_LEN to set the size.
  20           In most cases driver model will only allocate a few uclasses
  21           and devices in SPL, so 1KB should be enable. See
  22           CONFIG_SYS_MALLOC_F_LEN for more details on how to enable it.
  23
  24 config DM_WARN
  25         bool "Enable warnings in driver model"
  26         depends on DM
  27         default y
  28         help
  29           The dm_warn() function can use up quite a bit of space for its
  30           strings. By default this is disabled for SPL builds to save space.
  31           This will cause dm_warn() to be compiled out - it will do nothing
  32           when called.
  33
  34 config DM_DEVICE_REMOVE
  35         bool "Support device removal"
  36         depends on DM
  37         default y
  38         help
  39           We can save some code space by dropping support for removing a
  40           device. This is not normally required in SPL, so by default this
  41           option is disabled for SPL.
  42
  43           Note that this may have undesirable results in the USB subsystem as
  44           it causes unplugged devices to linger around in the dm-tree, and it
  45           causes USB host controllers to not be stopped when booting the OS.
  46
  47 config DM_STDIO
  48         bool "Support stdio registration"
  49         depends on DM
  50         default y
  51         help
  52           Normally serial drivers register with stdio so that they can be used
  53           as normal output devices. In SPL we don't normally use stdio, so
  54           we can omit this feature.
  55
  56 config DM_SEQ_ALIAS
  57         bool "Support numbered aliases in device tree"
  58         depends on DM
  59         default y
  60         help
  61           Most boards will have a '/aliases' node containing the path to
  62           numbered devices (e.g. serial0 = &serial0). This feature can be
  63           disabled if it is not required, to save code space in SPL.
  64
  65 config REGMAP
  66         bool "Support register maps"
  67         depends on DM
  68         help
  69           Hardware peripherals tend to have one or more sets of registers
  70           which can be accessed to control the hardware. A register map
  71           models this with a simple read/write interface. It can in principle
  72           support any bus type (I2C, SPI) but so far this only supports
  73           direct memory access.
  74
  75 config SYSCON
  76         bool "Support system controllers"
  77         depends on REGMAP
  78         help
  79           Many SoCs have a number of system controllers which are dealt with
  80           as a group by a single driver. Some common functionality is provided
  81           by this uclass, including accessing registers via regmap and
  82           assigning a unique number to each.
  83
  84 config DEVRES
  85         bool "Managed device resources"
  86         depends on DM
  87         help
  88           This option enables the Managed device resources core support.
  89           Device resources managed by the devres framework are automatically
  90           released whether initialization fails half-way or the device gets
  91           detached.
  92
  93           If this option is disabled, devres functions fall back to
  94           non-managed variants.  For example, devres_alloc() to kzalloc(),
  95           devm_kmalloc() to kmalloc(), etc.
  96
  97 config DEBUG_DEVRES
  98         bool "Managed device resources debugging functions"
  99         depends on DEVRES
 100         help
 101           If this option is enabled, devres debug messages are printed.
 102           Also, a function is available to dump a list of device resources.
 103           Select this if you are having a problem with devres or want to
 104           debug resource management for a managed device.
 105
 106           If you are unsure about this, Say N here.
 107
 108 config SIMPLE_BUS
 109         bool "Support simple-bus driver"
 110         depends on DM && OF_CONTROL
 111         default y
 112         help
 113           Supports the 'simple-bus' driver, which is used on some systems.
 114
 115 config SPL_SIMPLE_BUS
 116         bool "Support simple-bus driver in SPL"
 117         depends on SPL_DM && SPL_OF_CONTROL
 118         default n
 119         help
 120           Supports the 'simple-bus' driver, which is used on some systems
 121           in SPL.
 122
 123 config OF_TRANSLATE
 124         bool "Translate addresses using fdt_translate_address"
 125         depends on DM && OF_CONTROL
 126         default y
 127         help
 128           If this option is enabled, the reg property will be translated
 129           using the fdt_translate_address() function. This is necessary
 130           on some platforms (e.g. MVEBU) using complex "ranges"
 131           properties in many nodes. As this translation is not handled
 132           correctly in the default simple_bus_translate() function.
 133
 134           If this option is not enabled, simple_bus_translate() will be
 135           used for the address translation. This function is faster and
 136           smaller in size than fdt_translate_address().
 137
 138 config SPL_OF_TRANSLATE
 139         bool "Translate addresses using fdt_translate_address"
 140         depends on SPL_DM && SPL_OF_CONTROL
 141         default n
 142         help
 143           If this option is enabled, the reg property will be translated
 144           using the fdt_translate_address() function. This is necessary
 145           on some platforms (e.g. MVEBU) using complex "ranges"
 146           properties in many nodes. As this translation is not handled
 147           correctly in the default simple_bus_translate() function.
 148
 149           If this option is not enabled, simple_bus_translate() will be
 150           used for the address translation. This function is faster and
 151           smaller in size than fdt_translate_address().
 152
 153 endmenu