mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
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>
204 lines
7.2 KiB
Text
204 lines
7.2 KiB
Text
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_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.
|
|
|
|
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 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 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.
|
|
|
|
endmenu
|