dm: core: Add Kconfig for simple bus driver

[karo-tx-uboot.git] / drivers / core / Kconfig

diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index dc32385e85492a7ab5a8f56539ed073061257d5d..41f4e695e8af8a8035f605049771b96dc4462203 100644 (file)
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -1,8 +1,123 @@
+menu "Generic Driver Options"
+

 config DM
        bool "Enable Driver Model"
 config DM
        bool "Enable Driver Model"

-       depends on !SPL_BUILD

        help
          This config option enables Driver Model. This brings in the core
          support, including scanning of platform data on start-up. If
          CONFIG_OF_CONTROL is enabled, the device tree will be scanned also
          when available.
        help
          This config option enables Driver Model. This brings in the core
          support, including scanning of platform data on start-up. If
          CONFIG_OF_CONTROL is enabled, the device tree will be scanned also
          when available.

+
+config SPL_DM
+       bool "Enable Driver Model for SPL"
+       depends on DM && SPL
+       help
+         Enable driver model in SPL. You will need to provide a
+         suitable malloc() implementation. If you are not using the
+         full malloc() enabled by CONFIG_SYS_SPL_MALLOC_START,
+         consider using CONFIG_SYS_MALLOC_SIMPLE. In that case you
+         must provide CONFIG_SYS_MALLOC_F_LEN to set the size.
+         In most cases driver model will only allocate a few uclasses
+         and devices in SPL, so 1KB should be enable. See
+         CONFIG_SYS_MALLOC_F_LEN for more details on how to enable it.
+
+config DM_WARN
+       bool "Enable warnings in driver model"
+       depends on DM
+       default y
+       help
+         The dm_warn() function can use up quite a bit of space for its
+         strings. By default this is disabled for SPL builds to save space.
+         This will cause dm_warn() to be compiled out - it will do nothing
+         when called.
+
+config DM_DEVICE_REMOVE
+       bool "Support device removal"
+       depends on DM
+       default y
+       help
+         We can save some code space by dropping support for removing a
+         device. This is not normally required in SPL, so by default this
+         option is disabled for SPL.
+
+         Note that this may have undesirable results in the USB subsystem as
+         it causes unplugged devices to linger around in the dm-tree, and it
+         causes USB host controllers to not be stopped when booting the OS.
+
+config DM_STDIO
+       bool "Support stdio registration"
+       depends on DM
+       default y
+       help
+         Normally serial drivers register with stdio so that they can be used
+         as normal output devices. In SPL we don't normally use stdio, so
+         we can omit this feature.
+
+config DM_SEQ_ALIAS
+       bool "Support numbered aliases in device tree"
+       depends on DM
+       default y
+       help
+         Most boards will have a '/aliases' node containing the path to
+         numbered devices (e.g. serial0 = &serial0). This feature can be
+         disabled if it is not required, to save code space in SPL.
+
+config REGMAP
+       bool "Support register maps"
+       depends on DM
+       help
+         Hardware peripherals tend to have one or more sets of registers
+         which can be accessed to control the hardware. A register map
+         models this with a simple read/write interface. It can in principle
+         support any bus type (I2C, SPI) but so far this only supports
+         direct memory access.
+
+config SYSCON
+       bool "Support system controllers"
+       depends on REGMAP
+       help
+         Many SoCs have a number of system controllers which are dealt with
+         as a group by a single driver. Some common functionality is provided
+         by this uclass, including accessing registers via regmap and
+         assigning a unique number to each.
+
+config DEVRES
+       bool "Managed device resources"
+       depends on DM
+       help
+         This option enables the Managed device resources core support.
+         Device resources managed by the devres framework are automatically
+         released whether initialization fails half-way or the device gets
+         detached.
+
+         If this option is disabled, devres functions fall back to
+         non-managed variants.  For example, devres_alloc() to kzalloc(),
+         devm_kmalloc() to kmalloc(), etc.
+
+config DEBUG_DEVRES
+       bool "Managed device resources debugging functions"
+       depends on DEVRES
+       help
+         If this option is enabled, devres debug messages are printed.
+         Also, a function is available to dump a list of device resources.
+         Select this if you are having a problem with devres or want to
+         debug resource management for a managed device.
+
+         If you are unsure about this, Say N here.
+
+config SIMPLE_BUS
+       bool "Support simple-bus driver"
+       depends on DM && OF_CONTROL
+       default y
+       help
+         Supports the 'simple-bus' driver, which is used on some systems.
+
+config SPL_SIMPLE_BUS
+       bool "Support simple-bus driver in SPL"
+       depends on SPL_DM && SPL_OF_CONTROL
+       default n
+       help
+         Supports the 'simple-bus' driver, which is used on some systems
+         in SPL.
+
+endmenu