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.
  64
  65 config SPL_DM_SEQ_ALIAS
  66         bool "Support numbered aliases in device tree in SPL"
  67         depends on DM
  68         default n
  69         help
  70           Most boards will have a '/aliases' node containing the path to
  71           numbered devices (e.g. serial0 = &serial0). This feature can be
  72           disabled if it is not required, to save code space in SPL.
  73
  74 config REGMAP
  75         bool "Support register maps"
  76         depends on DM
  77         help
  78           Hardware peripherals tend to have one or more sets of registers
  79           which can be accessed to control the hardware. A register map
  80           models this with a simple read/write interface. It can in principle
  81           support any bus type (I2C, SPI) but so far this only supports
  82           direct memory access.
  83
  84 config SPL_REGMAP
  85         bool "Support register maps in SPL"
  86         depends on DM
  87         help
  88           Hardware peripherals tend to have one or more sets of registers
  89           which can be accessed to control the hardware. A register map
  90           models this with a simple read/write interface. It can in principle
  91           support any bus type (I2C, SPI) but so far this only supports
  92           direct memory access.
  93
  94 config SYSCON
  95         bool "Support system controllers"
  96         depends on REGMAP
  97         help
  98           Many SoCs have a number of system controllers which are dealt with
  99           as a group by a single driver. Some common functionality is provided
 100           by this uclass, including accessing registers via regmap and
 101           assigning a unique number to each.
 102
 103 config SPL_SYSCON
 104         bool "Support system controllers in SPL"
 105         depends on REGMAP
 106         help
 107           Many SoCs have a number of system controllers which are dealt with
 108           as a group by a single driver. Some common functionality is provided
 109           by this uclass, including accessing registers via regmap and
 110           assigning a unique number to each.
 111
 112 config DEVRES
 113         bool "Managed device resources"
 114         depends on DM
 115         help
 116           This option enables the Managed device resources core support.
 117           Device resources managed by the devres framework are automatically
 118           released whether initialization fails half-way or the device gets
 119           detached.
 120
 121           If this option is disabled, devres functions fall back to
 122           non-managed variants.  For example, devres_alloc() to kzalloc(),
 123           devm_kmalloc() to kmalloc(), etc.
 124
 125 config DEBUG_DEVRES
 126         bool "Managed device resources debugging functions"
 127         depends on DEVRES
 128         help
 129           If this option is enabled, devres debug messages are printed.
 130           Also, a function is available to dump a list of device resources.
 131           Select this if you are having a problem with devres or want to
 132           debug resource management for a managed device.
 133
 134           If you are unsure about this, Say N here.
 135
 136 config SIMPLE_BUS
 137         bool "Support simple-bus driver"
 138         depends on DM && OF_CONTROL
 139         default y
 140         help
 141           Supports the 'simple-bus' driver, which is used on some systems.
 142
 143 config SPL_SIMPLE_BUS
 144         bool "Support simple-bus driver in SPL"
 145         depends on SPL_DM && SPL_OF_CONTROL
 146         default y
 147         help
 148           Supports the 'simple-bus' driver, which is used on some systems
 149           in SPL.
 150
 151 config OF_TRANSLATE
 152         bool "Translate addresses using fdt_translate_address"
 153         depends on DM && OF_CONTROL
 154         default y
 155         help
 156           If this option is enabled, the reg property will be translated
 157           using the fdt_translate_address() function. This is necessary
 158           on some platforms (e.g. MVEBU) using complex "ranges"
 159           properties in many nodes. As this translation is not handled
 160           correctly in the default simple_bus_translate() function.
 161
 162           If this option is not enabled, simple_bus_translate() will be
 163           used for the address translation. This function is faster and
 164           smaller in size than fdt_translate_address().
 165
 166 config SPL_OF_TRANSLATE
 167         bool "Translate addresses using fdt_translate_address in SPL"
 168         depends on SPL_DM && SPL_OF_CONTROL
 169         default n
 170         help
 171           If this option is enabled, the reg property will be translated
 172           using the fdt_translate_address() function. This is necessary
 173           on some platforms (e.g. MVEBU) using complex "ranges"
 174           properties in many nodes. As this translation is not handled
 175           correctly in the default simple_bus_translate() function.
 176
 177           If this option is not enabled, simple_bus_translate() will be
 178           used for the address translation. This function is faster and
 179           smaller in size than fdt_translate_address().
 180
 181 endmenu