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. 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" 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. depends on DM default y if !SPL_BUILD default n if SPL_BUILD config DM_DEVICE_REMOVE bool "Support device removal" 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. depends on DM default y if !SPL_BUILD default n if SPL_BUILD config DM_STDIO bool "Support stdio registration" 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. depends on DM default y if !SPL_BUILD default n if SPL_BUILD