| config DM |
| bool "Enable Driver Model" |
| 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 DEBUG_DEVRES |
| bool "Managed device resources verbose debug messages" |
| depends on DM |
| 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. |