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0a222d53d8
Support ISA busses in much the same way as Linux does. This allows for ISA bus addresses to be translated, and only if CONFIG_OF_ISA_BUS is selected in order to avoid including the code in builds which won't need it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reviewed-by: Simon Glass <sjg@chromium.org>
205 lines
7.2 KiB
Plaintext
205 lines
7.2 KiB
Plaintext
menu "Generic Driver Options"
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config DM
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bool "Enable Driver Model"
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help
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This config option enables Driver Model. This brings in the core
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support, including scanning of platform data on start-up. If
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CONFIG_OF_CONTROL is enabled, the device tree will be scanned also
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when available.
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config SPL_DM
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bool "Enable Driver Model for SPL"
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depends on DM && SPL
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help
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Enable driver model in SPL. You will need to provide a
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suitable malloc() implementation. If you are not using the
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full malloc() enabled by CONFIG_SYS_SPL_MALLOC_START,
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consider using CONFIG_SYS_MALLOC_SIMPLE. In that case you
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must provide CONFIG_SYS_MALLOC_F_LEN to set the size.
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In most cases driver model will only allocate a few uclasses
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and devices in SPL, so 1KB should be enable. See
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CONFIG_SYS_MALLOC_F_LEN for more details on how to enable it.
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config DM_WARN
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bool "Enable warnings in driver model"
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depends on DM
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default y
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help
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The dm_warn() function can use up quite a bit of space for its
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strings. By default this is disabled for SPL builds to save space.
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This will cause dm_warn() to be compiled out - it will do nothing
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when called.
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config DM_DEVICE_REMOVE
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bool "Support device removal"
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depends on DM
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default y
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help
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We can save some code space by dropping support for removing a
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device. This is not normally required in SPL, so by default this
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option is disabled for SPL.
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Note that this may have undesirable results in the USB subsystem as
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it causes unplugged devices to linger around in the dm-tree, and it
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causes USB host controllers to not be stopped when booting the OS.
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config DM_STDIO
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bool "Support stdio registration"
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depends on DM
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default y
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help
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Normally serial drivers register with stdio so that they can be used
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as normal output devices. In SPL we don't normally use stdio, so
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we can omit this feature.
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config DM_SEQ_ALIAS
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bool "Support numbered aliases in device tree"
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depends on DM
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default y
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help
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Most boards will have a '/aliases' node containing the path to
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numbered devices (e.g. serial0 = &serial0). This feature can be
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disabled if it is not required.
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config SPL_DM_SEQ_ALIAS
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bool "Support numbered aliases in device tree in SPL"
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depends on DM
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default n
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help
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Most boards will have a '/aliases' node containing the path to
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numbered devices (e.g. serial0 = &serial0). This feature can be
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disabled if it is not required, to save code space in SPL.
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config REGMAP
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bool "Support register maps"
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depends on DM
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help
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Hardware peripherals tend to have one or more sets of registers
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which can be accessed to control the hardware. A register map
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models this with a simple read/write interface. It can in principle
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support any bus type (I2C, SPI) but so far this only supports
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direct memory access.
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config SPL_REGMAP
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bool "Support register maps in SPL"
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depends on DM
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help
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Hardware peripherals tend to have one or more sets of registers
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which can be accessed to control the hardware. A register map
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models this with a simple read/write interface. It can in principle
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support any bus type (I2C, SPI) but so far this only supports
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direct memory access.
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config SYSCON
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bool "Support system controllers"
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depends on REGMAP
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help
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Many SoCs have a number of system controllers which are dealt with
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as a group by a single driver. Some common functionality is provided
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by this uclass, including accessing registers via regmap and
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assigning a unique number to each.
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config SPL_SYSCON
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bool "Support system controllers in SPL"
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depends on REGMAP
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help
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Many SoCs have a number of system controllers which are dealt with
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as a group by a single driver. Some common functionality is provided
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by this uclass, including accessing registers via regmap and
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assigning a unique number to each.
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config DEVRES
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bool "Managed device resources"
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depends on DM
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help
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This option enables the Managed device resources core support.
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Device resources managed by the devres framework are automatically
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released whether initialization fails half-way or the device gets
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detached.
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If this option is disabled, devres functions fall back to
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non-managed variants. For example, devres_alloc() to kzalloc(),
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devm_kmalloc() to kmalloc(), etc.
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config DEBUG_DEVRES
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bool "Managed device resources debugging functions"
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depends on DEVRES
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help
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If this option is enabled, devres debug messages are printed.
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Also, a function is available to dump a list of device resources.
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Select this if you are having a problem with devres or want to
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debug resource management for a managed device.
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If you are unsure about this, Say N here.
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config SIMPLE_BUS
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bool "Support simple-bus driver"
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depends on DM && OF_CONTROL
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default y
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help
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Supports the 'simple-bus' driver, which is used on some systems.
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config SPL_SIMPLE_BUS
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bool "Support simple-bus driver in SPL"
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depends on SPL_DM && SPL_OF_CONTROL
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default y
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help
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Supports the 'simple-bus' driver, which is used on some systems
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in SPL.
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config OF_TRANSLATE
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bool "Translate addresses using fdt_translate_address"
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depends on DM && OF_CONTROL
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default y
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help
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If this option is enabled, the reg property will be translated
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using the fdt_translate_address() function. This is necessary
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on some platforms (e.g. MVEBU) using complex "ranges"
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properties in many nodes. As this translation is not handled
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correctly in the default simple_bus_translate() function.
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If this option is not enabled, simple_bus_translate() will be
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used for the address translation. This function is faster and
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smaller in size than fdt_translate_address().
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config SPL_OF_TRANSLATE
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bool "Translate addresses using fdt_translate_address in SPL"
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depends on SPL_DM && SPL_OF_CONTROL
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default n
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help
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If this option is enabled, the reg property will be translated
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using the fdt_translate_address() function. This is necessary
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on some platforms (e.g. MVEBU) using complex "ranges"
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properties in many nodes. As this translation is not handled
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correctly in the default simple_bus_translate() function.
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If this option is not enabled, simple_bus_translate() will be
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used for the address translation. This function is faster and
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smaller in size than fdt_translate_address().
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config OF_ISA_BUS
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bool
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depends on OF_TRANSLATE
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help
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Is this option is enabled then support for the ISA bus will
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be included for addresses read from DT. This is something that
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should be known to be required or not based upon the board
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being targetted, and whether or not it makes use of an ISA bus.
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The bus is matched based upon its node name equalling "isa". The
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busses #address-cells should equal 2, with the first cell being
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used to hold flags & flag 0x1 indicating that the address range
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should be accessed using I/O port in/out accessors. The second
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cell holds the offset into ISA bus address space. The #size-cells
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property should equal 1, and of course holds the size of the
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address range used by a device.
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If this option is not enabled then support for the ISA bus is
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not included and any such busses used in DT will be treated as
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typical simple-bus compatible busses. This will lead to
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mistranslation of device addresses, so ensure that this is
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enabled if your board does include an ISA bus.
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endmenu
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