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dm: of-platadata: Add option for device instantiation

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Add Kconfig options to support build-time device instantiation. When
fully implemented, this will allow dtoc to create U-Boot devices (i.e.
struct udevice records) at build time, thus reducing code space in
SPL.

For now this defaults to off, but will be enabled when the rest of
the implementation is in place.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-02-03 06:01:13 -07:00
parent 4a092350d1
commit 5a1b25c201
2 changed files with 25 additions and 2 deletions
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23
dts/Kconfig
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@ -355,15 +355,24 @@ config SPL_OF_PLATDATA
compatible string, then adding platform data and U_BOOT_DRVINFO
declarations for each node. See of-plat.txt for more information.
if SPL_OF_PLATDATA
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 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.
endif
config TPL_OF_PLATDATA
bool "Generate platform data for use in TPL"
depends on TPL_OF_CONTROL
@ -385,13 +394,23 @@ config TPL_OF_PLATDATA
compatible string, then adding platform data and U_BOOT_DRVINFO
declarations for each node. See of-plat.txt for more information.
if TPL_OF_PLATDATA
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;
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.
endif
endmenu

4
scripts/Makefile.spl
View File

@ -313,6 +313,10 @@ pythonpath = PYTHONPATH=scripts/dtc/pylibfdt
DTOC_ARGS := $(pythonpath) $(srctree)/tools/dtoc/dtoc \
-d $(obj)/$(SPL_BIN).dtb -p $(SPL_NAME)
ifneq ($(CONFIG_$(SPL_TPL_)OF_PLATDATA_INST),)
DTOC_ARGS += -i
endif
quiet_cmd_dtoc = DTOC $@
cmd_dtoc = $(DTOC_ARGS) -c $(obj)/dts -C include/generated all