bool
select DTOC
+config BINMAN_STANDALONE_FDT
+ bool
+ depends on BINMAN
+ default y if OF_BOARD || OF_PRIOR_STAGE
+ help
+ This option tells U-Boot build system that a standalone device tree
+ source is explicitly required when using binman to package U-Boot.
+
+ This is not necessary in a common scenario where a device tree source
+ that contains the binman node is provided in the arch/<arch>/dts
+ directory for a specific board. Such device tree sources are built for
+ OF_SEPARATE or OF_EMBED. However for a scenario like the board device
+ tree blob is not provided in the U-Boot build tree, but fed to U-Boot
+ in the runtime, e.g.: in the OF_PRIOR_STAGE case that it is passed by
+ a prior stage bootloader. For such scenario, a standalone device tree
+ blob containing binman node to describe how to package U-Boot should
+ be provided explicitly.
+
menu "Device Tree Control"
depends on SUPPORT_OF_CONTROL
config OF_CONTROL
bool "Run-time configuration via Device Tree"
select DTC
+ select OF_LIBFDT if !OF_PLATDATA
+ select OF_REAL if !OF_PLATDATA
help
This feature provides for run-time configuration of U-Boot
via a flattened device tree.
+config OF_REAL
+ bool
+ help
+ Indicates that a real devicetree is available which can be accessed
+ at runtime. This means that dev_read_...() functions can be used to
+ read data from the devicetree for each device. This is true if
+ OF_CONTROL is enabled in U-Boot proper.
+
config OF_BOARD_FIXUP
bool "Board-specific manipulation of Device Tree"
help
config SPL_OF_CONTROL
bool "Enable run-time configuration via Device Tree in SPL"
depends on SPL && OF_CONTROL
+ select SPL_OF_LIBFDT if !SPL_OF_PLATDATA
+ select SPL_OF_REAL if !SPL_OF_PLATDATA
help
Some boards use device tree in U-Boot but only have 4KB of SRAM
- which is not enough to support device tree. Enable this option to
+ which is not enough to support device tree. Disable this option to
allow such boards to be supported by U-Boot SPL.
config TPL_OF_CONTROL
bool "Enable run-time configuration via Device Tree in TPL"
depends on TPL && OF_CONTROL
+ select TPL_OF_LIBFDT if !TPL_OF_PLATDATA
+ select TPL_OF_REAL if !TPL_OF_PLATDATA
help
Some boards use device tree in U-Boot but only have 4KB of SRAM
which is not enough to support device tree. Enable this option to
config OF_LIVE
bool "Enable use of a live tree"
- depends on OF_CONTROL
+ depends on DM && OF_CONTROL
help
Normally U-Boot uses a flat device tree which saves space and
avoids the need to unpack the tree before use. However a flat
Boards in the mainline U-Boot tree should not use it.
config OF_BOARD
- bool "Provided by the board at runtime"
+ bool "Provided by the board (e.g a previous loader) at runtime"
depends on !SANDBOX
help
If this option is enabled, the device tree will be provided by
device tree files (without the directory or .dtb suffix)
separated by <space>.
+config OF_OVERLAY_LIST
+ string "List of device tree overlays to include for DT control"
+ depends on SPL_LOAD_FIT_APPLY_OVERLAY
+ help
+ This option specifies a list of device tree overlays to use for DT
+ control. This option can then be used by a FIT generator to include
+ the overlays in the FIT image.
+
choice
- prompt "SPL OF LIST compression"
+ prompt "OF LIST compression"
depends on MULTI_DTB_FIT
default MULTI_DTB_FIT_NO_COMPRESSION
config SPL_MULTI_DTB_FIT
- depends on SPL_LOAD_FIT && SPL_OF_CONTROL && !SPL_OF_PLATDATA
+ depends on SPL_LOAD_FIT && SPL_OF_REAL
bool "Support embedding several DTBs in a FIT image for the SPL"
help
This option provides the SPL with the ability to select its own
config OF_SPL_REMOVE_PROPS
string "List of device tree properties to drop for SPL"
depends on SPL_OF_CONTROL
- default "interrupt-parent" if SPL_PINCTRL && SPL_CLK
- default "clocks clock-names interrupt-parent" if SPL_PINCTRL
- default "pinctrl-0 pinctrl-names interrupt-parent" if SPL_CLK
- default "pinctrl-0 pinctrl-names clocks clock-names interrupt-parent"
+ default "interrupt-parent interrupts" if SPL_PINCTRL && SPL_CLK
+ default "clocks clock-names interrupt-parent interrupts" if SPL_PINCTRL
+ default "pinctrl-0 pinctrl-names interrupt-parent interrupts" if SPL_CLK
+ default "pinctrl-0 pinctrl-names clocks clock-names interrupt-parent interrupts"
help
Since SPL normally runs in a reduced memory space, the device tree
is cut down to only what is needed to load and start U-Boot. Only
can be discarded. This option defines the list of properties to
discard.
+config OF_DTB_PROPS_REMOVE
+ bool "Enable removal of device tree properties"
+ depends on OF_CONTROL
+ help
+ Some boards have restricted amount of storage for U-Boot image.
+ If the generated binary doesn't fit into available image storage,
+ the built-in device tree could probably be cut down by removing
+ some not required device tree properties to reduce the image size.
+ Enable this option and define the properties to be removed in the
+ CONFIG_OF_REMOVE_PROPS list. Do not enable this option if you must
+ pass the built-in DTB directly to the kernel!
+
+config OF_REMOVE_PROPS
+ string "List of device tree properties to drop"
+ depends on OF_DTB_PROPS_REMOVE
+ default "interrupt-parent interrupts" if PINCTRL
+ help
+ Some properties are not used by U-Boot and can be discarded.
+ This option defines the list of properties to discard.
+
config SPL_OF_PLATDATA
bool "Generate platform data for use in SPL"
depends on SPL_OF_CONTROL
select DTOC
+ select SPL_OF_PLATDATA_DRIVER_RT if !SPL_OF_PLATDATA_INST
help
For very constrained SPL environments the overhead of decoding
device tree nodes and converting their contents into platform data
former can add 3KB or more to a Thumb 2 Image.
This option enables generation of platform data from the device
- tree as C code. This code creates devices using U_BOOT_DEVICE()
+ tree as C code. This code creates devices using U_BOOT_DRVINFO()
declarations. The benefit is that it allows driver code to access
the platform data directly in C structures, avoidin the libfdt
overhead.
This option works by generating C structure declarations for each
- compatible string, then adding platform data and U_BOOT_DEVICE
+ compatible string, then adding platform data and U_BOOT_DRVINFO
declarations for each node. See of-plat.txt for more information.
+config SPL_OF_REAL
+ bool
+ help
+ Indicates that a real devicetree is available which can be accessed
+ at runtime. This means that dev_read_...() functions can be used to
+ read data from the devicetree for each device. This is true if
+ SPL_OF_CONTROL is enabled and not SPL_OF_PLATDATA
+
+if SPL_OF_PLATDATA
+
+config SPL_OF_PLATDATA_PARENT
+ bool "Support parent information in devices"
+ default y
+ help
+ Generally it is useful to be able to access the parent of a device
+ with of-platdata. To save space this can be disabled, but in that
+ case dev_get_parent() will always return NULL;
+
+config SPL_OF_PLATDATA_INST
+ bool "Declare devices at build time"
+ help
+ Declare devices as udevice instances so that they do not need to be
+ bound when U-Boot starts. This can save time and code space.
+
+config SPL_OF_PLATDATA_NO_BIND
+ bool "Don't allow run-time binding of devices"
+ depends on SPL_OF_PLATDATA_INST
+ default y
+ help
+ This removes the ability to bind devices at run time, thus saving
+ some code space in U-Boot. This can be disabled if binding is needed,
+ at the code of some code size increase.
+
+config SPL_OF_PLATDATA_RT
+ bool "Use a separate struct for device runtime data"
+ depends on SPL_OF_PLATDATA_INST
+ default y
+ help
+ For systems running SPL from read-only memory it is convenient to
+ separate out the runtime information, so that the devices don't need
+ to be copied before being used. This moves the read-write parts of
+ struct udevice (at present just the flags) into a separate struct,
+ which is allocated at runtime.
+
+config SPL_OF_PLATDATA_DRIVER_RT
+ bool
+ help
+ Use a separate struct for driver runtime data.
+
+ This enables the driver_rt information, used with of-platdata when
+ of-platdata-inst is not used. It allows finding devices by their
+ driver data.
+
+endif
+
+config TPL_OF_REAL
+ bool
+ help
+ Indicates that a real devicetree is available which can be accessed
+ at runtime. This means that dev_read_...() functions can be used to
+ read data from the devicetree for each device. This is true if
+ TPL_OF_CONTROL is enabled and not TPL_OF_PLATDATA
+
config TPL_OF_PLATDATA
bool "Generate platform data for use in TPL"
depends on TPL_OF_CONTROL
select DTOC
+ select TPL_OF_PLATDATA_DRIVER_RT if !TPL_OF_PLATDATA_INST
help
For very constrained SPL environments the overhead of decoding
device tree nodes and converting their contents into platform data
former can add 3KB or more to a Thumb 2 Image.
This option enables generation of platform data from the device
- tree as C code. This code creates devices using U_BOOT_DEVICE()
+ tree as C code. This code creates devices using U_BOOT_DRVINFO()
declarations. The benefit is that it allows driver code to access
the platform data directly in C structures, avoidin the libfdt
overhead.
This option works by generating C structure declarations for each
- compatible string, then adding platform data and U_BOOT_DEVICE
+ compatible string, then adding platform data and U_BOOT_DRVINFO
declarations for each node. See of-plat.txt for more information.
-endmenu
+if TPL_OF_PLATDATA
+
+config TPL_OF_PLATDATA_PARENT
+ bool "Support parent information in devices"
+ default y
+ help
+ Generally it is useful to be able to access the parent of a device
+ with of-platdata. To save space this can be disabled, but in that
+ case dev_get_parent() will always return NULL;
+
+config TPL_OF_PLATDATA_INST
+ bool "Declare devices at build time"
+
+ help
+ Declare devices as udevice instances so that they do not need to be
+ bound when U-Boot starts. This can save time and code space.
+
+config TPL_OF_PLATDATA_NO_BIND
+ bool "Don't allow run-time binding of devices"
+ depends on TPL_OF_PLATDATA_INST
+ default y
+ help
+ This removes the ability to bind devices at run time, thus saving
+ some code space in U-Boot. This can be disabled if binding is needed,
+ at the code of some code size increase.
+
+config TPL_OF_PLATDATA_RT
+ bool "Use a separate struct for device runtime data"
+ depends on TPL_OF_PLATDATA_INST
+ default y
+ help
+ For systems running TPL from read-only memory it is convenient to
+ separate out the runtime information, so that the devices don't need
+ to be copied before being used. This moves the read-write parts of
+ struct udevice (at present just the flags) into a separate struct,
+ which is allocated at runtime.
-config MKIMAGE_DTC_PATH
- string "Path to dtc binary for use within mkimage"
- default "dtc"
+config TPL_OF_PLATDATA_DRIVER_RT
+ bool
help
- The mkimage host tool will, in order to generate FIT images make
- calls to the dtc application in order to create the output. In
- some cases the system dtc may not support all required features
- and the path to a different version should be given here.
+ Use a separate struct for driver runtime data.
+
+ This enables the driver_rt information, used with of-platdata when
+ of-platdata-inst is not used. It allows finding devices by their
+ driver data.
+
+endif
+
+endmenu
projects / platform / kernel / u-boot.git / blobdiff