| menu "Generic Driver Options" |
| |
| 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_SPL_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_SPL_SYS_MALLOC_F_LEN for more details on how to enable it. |
| |
| config TPL_DM |
| bool "Enable Driver Model for TPL" |
| depends on DM && TPL |
| help |
| Enable driver model in TPL. 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_SPL_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 enough. See |
| CONFIG_SPL_SYS_MALLOC_F_LEN for more details on how to enable it. |
| Disable this for very small implementations. |
| |
| 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_DEBUG |
| bool "Enable debug messages in driver model core" |
| depends on DM |
| help |
| Say Y here if you want to compile in debug messages in DM core. |
| |
| 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. |
| |
| 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 SPL_DM_DEVICE_REMOVE |
| bool "Support device removal in SPL" |
| depends on SPL_DM |
| default n |
| 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. |
| |
| 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. |
| |
| config SPL_DM_SEQ_ALIAS |
| bool "Support numbered aliases in device tree in SPL" |
| depends on DM |
| default n |
| 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 SPL_REGMAP |
| bool "Support register maps in SPL" |
| depends on SPL_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 TPL_REGMAP |
| bool "Support register maps in TPL" |
| depends on TPL_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 SPL_SYSCON |
| bool "Support system controllers in SPL" |
| depends on SPL_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 TPL_SYSCON |
| bool "Support system controllers in TPL" |
| depends on TPL_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 y |
| help |
| Supports the 'simple-bus' driver, which is used on some systems |
| in SPL. |
| |
| config OF_TRANSLATE |
| bool "Translate addresses using fdt_translate_address" |
| depends on DM && OF_CONTROL |
| default y |
| help |
| If this option is enabled, the reg property will be translated |
| using the fdt_translate_address() function. This is necessary |
| on some platforms (e.g. MVEBU) using complex "ranges" |
| properties in many nodes. As this translation is not handled |
| correctly in the default simple_bus_translate() function. |
| |
| If this option is not enabled, simple_bus_translate() will be |
| used for the address translation. This function is faster and |
| smaller in size than fdt_translate_address(). |
| |
| config SPL_OF_TRANSLATE |
| bool "Translate addresses using fdt_translate_address in SPL" |
| depends on SPL_DM && SPL_OF_CONTROL |
| default n |
| help |
| If this option is enabled, the reg property will be translated |
| using the fdt_translate_address() function. This is necessary |
| on some platforms (e.g. MVEBU) using complex "ranges" |
| properties in many nodes. As this translation is not handled |
| correctly in the default simple_bus_translate() function. |
| |
| If this option is not enabled, simple_bus_translate() will be |
| used for the address translation. This function is faster and |
| smaller in size than fdt_translate_address(). |
| |
| config OF_ISA_BUS |
| bool |
| depends on OF_TRANSLATE |
| help |
| Is this option is enabled then support for the ISA bus will |
| be included for addresses read from DT. This is something that |
| should be known to be required or not based upon the board |
| being targetted, and whether or not it makes use of an ISA bus. |
| |
| The bus is matched based upon its node name equalling "isa". The |
| busses #address-cells should equal 2, with the first cell being |
| used to hold flags & flag 0x1 indicating that the address range |
| should be accessed using I/O port in/out accessors. The second |
| cell holds the offset into ISA bus address space. The #size-cells |
| property should equal 1, and of course holds the size of the |
| address range used by a device. |
| |
| If this option is not enabled then support for the ISA bus is |
| not included and any such busses used in DT will be treated as |
| typical simple-bus compatible busses. This will lead to |
| mistranslation of device addresses, so ensure that this is |
| enabled if your board does include an ISA bus. |
| |
| config DM_DEV_READ_INLINE |
| bool |
| default y if !OF_LIVE |
| |
| endmenu |