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u-boot/dts/Kconfig
Simon Glass e41651fffd dm: Support parent devices with of-platdata 
At present of-platdata does not provide parent information. But this is
useful for I2C devices, for example, since it allows them to determine
which bus they are on.

Add support for setting the parent correctly, by storing the parent
driver_info index in dtoc and reading this in lists_bind_drivers(). This
needs multiple passes since we must process children after their parents
already have been bound.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-10-29 14:42:18 -06:00

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#
# Device Tree Control
#
config SUPPORT_OF_CONTROL
bool
config DTC
bool
config PYLIBFDT
bool
config DTOC
bool
select PYLIBFDT
config BINMAN
bool
select DTOC
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
help
This feature provides for run-time configuration of U-Boot
via a flattened device tree.
config OF_BOARD_FIXUP
bool "Board-specific manipulation of Device Tree"
help
In certain circumstances it is necessary to be able to modify
U-Boot's device tree (e.g. to delete device from it). This option
make the Device Tree writeable and provides a board-specific
"board_fix_fdt" callback (called during pre-relocation time), which
enables the board initialization to modifiy the Device Tree. The
modified copy is subsequently used by U-Boot after relocation.
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
help
Some boards use device tree in U-Boot but only have 4KB of SRAM
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
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
allow such boards to be supported by U-Boot TPL.
config OF_LIVE
bool "Enable use of a live tree"
depends on 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
tree does not support modification from within U-Boot since it
can invalidate driver-model device tree offsets. This option
enables a live tree which is available after relocation,
and can be adjusted as needed.
choice
prompt "Provider of DTB for DT control"
depends on OF_CONTROL
config OF_SEPARATE
bool "Separate DTB for DT control"
depends on !SANDBOX
help
If this option is enabled, the device tree will be built and
placed as a separate u-boot.dtb file alongside the U-Boot image.
config OF_EMBED
bool "Embedded DTB for DT control"
help
If this option is enabled, the device tree will be picked up and
built into the U-Boot image. This is suitable for local debugging
and development only and is not recommended for production devices.
Boards in the mainline U-Boot tree should not use it.
config OF_BOARD
bool "Provided by the board at runtime"
depends on !SANDBOX
help
If this option is enabled, the device tree will be provided by
the board at runtime if the board supports it, instead of being
bundled with the image.
config OF_HOSTFILE
bool "Host filed DTB for DT control"
depends on SANDBOX
help
If this option is enabled, DTB will be read from a file on startup.
This is only useful for Sandbox. Use the -d flag to U-Boot to
specify the file to read.
config OF_PRIOR_STAGE
bool "Prior stage bootloader DTB for DT control"
help
If this option is enabled, the device tree used for DT
control will be read from a device tree binary, at a memory
location passed to U-Boot by the prior stage bootloader.
endchoice
config DEFAULT_DEVICE_TREE
string "Default Device Tree for DT control"
depends on OF_CONTROL
help
This option specifies the default Device Tree used for DT control.
It can be overridden from the command line:
$ make DEVICE_TREE=<device-tree-name>
config OF_LIST
string "List of device tree files to include for DT control"
depends on SPL_LOAD_FIT || MULTI_DTB_FIT
default DEFAULT_DEVICE_TREE
help
This option specifies a list of device tree files to use for DT
control. These will be packaged into a FIT. At run-time, U-boot
or SPL will select the correct DT to use by examining the
hardware (e.g. reading a board ID value). This is a list of
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 "OF LIST compression"
depends on MULTI_DTB_FIT
default MULTI_DTB_FIT_NO_COMPRESSION
config MULTI_DTB_FIT_LZO
bool "LZO"
depends on SYS_MALLOC_F
select LZO
help
Compress the FIT image containing the DTBs available for the SPL
using LZO compression. (requires lzop on host).
config MULTI_DTB_FIT_GZIP
bool "GZIP"
depends on SYS_MALLOC_F
select GZIP
help
Compress the FIT image containing the DTBs available for the SPL
using GZIP compression. (requires gzip on host)
config MULTI_DTB_FIT_NO_COMPRESSION
bool "No compression"
help
Do not compress the FIT image containing the DTBs available for the SPL.
Use this options only if LZO is not available and the DTBs are very small.
endchoice
choice
prompt "Location of uncompressed DTBs"
depends on (MULTI_DTB_FIT_GZIP || MULTI_DTB_FIT_LZO)
default MULTI_DTB_FIT_DYN_ALLOC if SYS_MALLOC_F
config MULTI_DTB_FIT_DYN_ALLOC
bool "Dynamically allocate the memory"
depends on SYS_MALLOC_F
config MULTI_DTB_FIT_USER_DEFINED_AREA
bool "User-defined location"
endchoice
config MULTI_DTB_FIT_UNCOMPRESS_SZ
hex "Size of memory reserved to uncompress the DTBs"
depends on (MULTI_DTB_FIT_GZIP || MULTI_DTB_FIT_LZO)
default 0x8000
help
This is the size of this area where the DTBs are uncompressed.
If this area is dynamically allocated, make sure that
SYS_MALLOC_F_LEN is big enough to contain it.
config MULTI_DTB_FIT_USER_DEF_ADDR
hex "Address of memory where dtbs are uncompressed"
depends on MULTI_DTB_FIT_USER_DEFINED_AREA
help
the FIT image containing the DTBs is uncompressed in an area defined
at compilation time. This is the address of this area. It must be
aligned on 2-byte boundary.
config DTB_RESELECT
bool "Support swapping dtbs at a later point in boot"
depends on MULTI_DTB_FIT
help
It is possible during initial boot you may need to use a generic
dtb until you can fully determine the board your running on. This
config allows boards to implement a function at a later point
during boot to switch to the "correct" dtb.
config MULTI_DTB_FIT
bool "Support embedding several DTBs in a FIT image for u-boot"
help
This option provides hooks to allow U-boot to parse an
appended FIT image and enable board specific code to then select
the correct DTB to be used. Use this if you need to support
multiple DTBs but don't use the SPL.
config SPL_MULTI_DTB_FIT
depends on SPL_LOAD_FIT && SPL_OF_CONTROL && !SPL_OF_PLATDATA
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
DTB at runtime from an appended FIT image containing several DTBs.
This allows using the same SPL binary on multiple platforms.
The primary purpose is to handle different versions of
the same platform without tweaking the platform code if the
differences can be expressed in the DTBs (common examples are: bus
capabilities, pad configurations).
config SPL_OF_LIST
string "List of device tree files to include for DT control in SPL"
depends on SPL_MULTI_DTB_FIT
default OF_LIST
help
This option specifies a list of device tree files to use for DT
control in the SPL. These will be packaged into a FIT. At run-time,
the SPL will select the correct DT to use by examining the
hardware (e.g. reading a board ID value). This is a list of
device tree files (without the directory or .dtb suffix)
separated by <space>.
choice
prompt "SPL OF LIST compression"
depends on SPL_MULTI_DTB_FIT
default SPL_MULTI_DTB_FIT_LZO
config SPL_MULTI_DTB_FIT_LZO
bool "LZO"
depends on SYS_MALLOC_F
select SPL_LZO
help
Compress the FIT image containing the DTBs available for the SPL
using LZO compression. (requires lzop on host).
config SPL_MULTI_DTB_FIT_GZIP
bool "GZIP"
depends on SYS_MALLOC_F
select SPL_GZIP
help
Compress the FIT image containing the DTBs available for the SPL
using GZIP compression. (requires gzip on host)
config SPL_MULTI_DTB_FIT_NO_COMPRESSION
bool "No compression"
help
Do not compress the FIT image containing the DTBs available for the SPL.
Use this options only if LZO is not available and the DTBs are very small.
endchoice
choice
prompt "Location of uncompressed DTBs"
depends on (SPL_MULTI_DTB_FIT_GZIP || SPL_MULTI_DTB_FIT_LZO)
default SPL_MULTI_DTB_FIT_DYN_ALLOC if SYS_MALLOC_F
config SPL_MULTI_DTB_FIT_DYN_ALLOC
bool "Dynamically allocate the memory"
depends on SYS_MALLOC_F
config SPL_MULTI_DTB_FIT_USER_DEFINED_AREA
bool "User-defined location"
endchoice
config SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ
hex "Size of memory reserved to uncompress the DTBs"
depends on (SPL_MULTI_DTB_FIT_GZIP || SPL_MULTI_DTB_FIT_LZO)
default 0x8000
help
This is the size of this area where the DTBs are uncompressed.
If this area is dynamically allocated, make sure that
SPL_SYS_MALLOC_F_LEN is big enough to contain it.
config SPL_MULTI_DTB_FIT_USER_DEF_ADDR
hex "Address of memory where dtbs are uncompressed"
depends on SPL_MULTI_DTB_FIT_USER_DEFINED_AREA
help
the FIT image containing the DTBs is uncompressed in an area defined
at compilation time. This is the address of this area. It must be
aligned on 2-byte boundary.
config OF_SPL_REMOVE_PROPS
string "List of device tree properties to drop for SPL"
depends on SPL_OF_CONTROL
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
nodes marked with the property "u-boot,dm-pre-reloc" will be
included. In addition, some properties are not used by U-Boot and
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
help
For very constrained SPL environments the overhead of decoding
device tree nodes and converting their contents into platform data
is too large. This overhead includes libfdt code as well as the
device tree contents itself. The latter is fairly compact, but the
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()
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
declarations for each node. See of-plat.txt for more information.
config SPL_OF_PLATDATA_PARENT
bool "Support parent information in devices"
depends on SPL_OF_PLATDATA
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
bool "Generate platform data for use in TPL"
depends on TPL_OF_CONTROL
select DTOC
help
For very constrained SPL environments the overhead of decoding
device tree nodes and converting their contents into platform data
is too large. This overhead includes libfdt code as well as the
device tree contents itself. The latter is fairly compact, but the
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()
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
declarations for each node. See of-plat.txt for more information.
config TPL_OF_PLATDATA_PARENT
bool "Support parent information in devices"
depends on TPL_OF_PLATDATA
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;
endmenu
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