devres: make Devres optional with CONFIG_DEVRES

[oweals/u-boot.git] / drivers / core / Kconfig

diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index 2861b4307955854ef1b0b5f51b7beedffd7e4fa9..8ae0072aa90166f89f742bb4d2438d97bb72aa8f 100644 (file)
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -38,6 +38,10 @@ config DM_DEVICE_REMOVE
          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
@@ -55,3 +59,45 @@ config DM_SEQ_ALIAS
          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 verbose debug messages"
+       depends on DEVRES
+       help
+         If this option is enabled, devres debug messages are printed.
+         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.