At present the structs used by this driver are not accessible outside it,
so cannot be used with OF_PLATDATA_INST. Move them to a header file to
fix this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
It is not possible to destroy the uclasses when they are created at
build time. Skip this step so that SPL test can complete successfully.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
When dt-structs.h is used, include the dt-decl.h header as well, so that
these declarations are available.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Which files we generate depends on the setting of OF_PLATDATA_INST in the
build. This might change between builds, but the build directory may be
reused.
Leaving old files around is confusing and switching the OF_PLATDATA_INST
setting does not necessarily regenerate the files, e.g. if the devicetree
has not changed.
Remove all the files before regenerating new ones.
Signed-off-by: Simon Glass <sjg@chromium.org>
There are actually two generated files but only one is currently mentioned
in the Makefile as a dependency. Put them both in a Makefile variable and
use that instead, to avoid inconsistency.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present all possible files are generated, even if some of them just
have a header and an empty body. It is better to generate only the files
that are needed, so that the two types of build (based on the setting of
OF_PLATDATA_INST) can be mutually exclusive.
This is intended to fix a strange problem sometimes found with CI:
Building current source for 1 boards (1 thread, 40 jobs per thread)
sandbox: + sandbox_spl
+drivers/built-in.o: In function `dm_setup_inst':
+drivers/core/root.c:135: undefined reference to
`_u_boot_list_2_udevice_2_root'
+dts/dt-uclass.o:(.u_boot_list_2_uclass_2_serial+0x10): undefined
reference to `_u_boot_list_2_udevice_2_serial'
...
This likely happens when switching from !OF_PLATDATA_INST to
OF_PLATDATA_INST since running 'make xxx_defconfig" does not currently
cause any change in which files are generated. With !OF_PLATDATA_INST
the dt-device.c file has no declarations and this is assumed to be the
starting state. The error above seems to indicate that, after changing
to OF_PLATDATA_INST, the dt-uclass.c file is regenerated but the
dt-device.c files is not. This does not seem possible from the relevant
Makefile.spl rule:
u-boot-spl-platdata := $(obj)/dts/dt-plat.o $(obj)/dts/dt-uclass.o
$(obj)/dts/dt-device.o
cmd_dtoc = $(DTOC_ARGS) -c $(obj)/dts -C include/generated all
include/generated/dt-structs-gen.h $(u-boot-spl-platdata_c) &: \
$(obj)/$(SPL_BIN).dtb
@[ -d $(obj)/dts ] || mkdir -p $(obj)/dts
$(call if_changed,dtoc)
It seems that this cannot regenerate dt-uclass.c without dt-device.c since
'dtoc all' is used. So here the trail ends for now.
In any case it seems better to generate files that are uses and not bother
with those that serve no purpose. So update dtoc to do this automatically.
Signed-off-by: Simon Glass <sjg@chromium.org>
When OF_PLATDATA_INST is enabled, we need dt-uclass.c and dt-device.c for
the build to work. When OF_PLATDATA_INST is not enabled, we only need
dt-plat.c
Update the Makefile rules to indicate this.
At present all files are generated and compiled regardless of which are
actually needed.
Signed-off-by: Simon Glass <sjg@chromium.org>
Since the dst_dir rule always runs, it causes a rebuild of the of-platdata
files even if not needed.
Create the directory inside the rule instead.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present the build rule for pylibfdt depends on _libfdt.so but modern
Python versions add a different suffix to the output file, resulting in
something like _libfdt.cpython-38-x86_64-linux-gnu.so
The result is that pylibfdt is rebuilt every time.
Rename the file the standard name so that the rule works correctly. Also
add libfdt.py to the dependencies, so that file is always created if
missing.
Signed-off-by: Simon Glass <sjg@chromium.org>
Now that dtoc generates some new C files, add these to the build so that
the instantiated devices and uclasses can be used.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
There is no need to ever add new uclasses since these are set up at build
time. Update the code to return an error if this is attempted.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
With this we don't need to scan and bind drivers, not even the root
device. We just need to locate the root device that was set up at build
time, then set our root in global_data to point to it.
Update the code to handle this case.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
When OF_PLATDATA_INST is enabled we don't need to create the uclass list.
Instead we just need to point to the existing list. Update the code
accordingly.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
With OF_PLATDATA_INST devices are bound at build time. We should not need
binding of devices at runtime in most cases. However it is inflexible to
absolutely prohibit it, so add an option to control this.
Update the driver model core so that it does not bind devices. Update
device_bind() to return an error if called.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Add macros which work with instantiated devices and uclasses, as created
at build time by dtoc. Include variants that can be used in data
structures.
These are mostly used by dtoc but it is worth documenting them fully for
the occasional case where they might come up in user code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
At present linker lists are designed for use in code. They make use of
statements within expressions ({...}), for example.
It is possible to generate a reference to a linker_list entry that can
be used in data structures, where such features are not permitted. It
requires that the reference first be declared as extern. In other
words the existing macro needs to be split into two parts.
Add new macros to support this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This is not needed in normal operation. Drop it.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
We can use extern instead, so let's drop these macros. It adds one more
thing to learn about and doesn't make the code any clearer.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
The module defines a duplicate uclass driver for UCLASS_SIMPLE_BUS, but
it is not allowed. This breaks of-platdata and makes the result
non-deterministic.
The driver does not need to be an uclass driver, so lets remove it. I
had turned it into an uclass driver because I thought wrongly it had to
call the dm_scan_fdt_dev routine to work properly, but some tests on the
board have shown otherwise.
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add support for generating a file containing udevice instances. This
avoids the need to create these at run time.
Update a test uclass to include a 'per_device_plat_auto' member, to
increase test coverage.
Add another tab to the driver_info output so it lines up nicely like the
device-instance output.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add support for generating a file containing uclass instances. This avoids
the need to create these at run time.
Update a test uclass to include a 'priv_auto' member, to increase test
coverage.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a summary to the top of the generated code, to make it easier to see
what the file contains.
Also add a tab to .plat so that its value lines up with the others.
Signed-off-by: Simon Glass <sjg@chromium.org>
For now dtoc only supports a hard-coded list of phandle properties, to
avoid any situation where it makes a mistake in its determination.
Make this into a constant dict, recording both the phandle property name
and the associated #cells property in the target node. This makes it
easier to find and modify.
Signed-off-by: Simon Glass <sjg@chromium.org>
Some of these do not follow the rules. Make sure the driver name matches
the compatible string in all cases.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present this property is a phandle but does not have a #xxx-cells
property to match it. Add one so that is works the same as gpio and clock
phandles.
Signed-off-by: Simon Glass <sjg@chromium.org>
This file is not used when instantiating devices. Update dtoc to skip
generating its contents and just add a comment instead.
Also it is useful to see the driver name and parent for each device.
Update the file to show that information, to avoid updating the same
tests twice.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add an option to generate the declaration file, which declares all
drivers and uclasses, so references can be used in the code.
Signed-off-by: Simon Glass <sjg@chromium.org>
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>
Add an option to instantiate devices at build time. For now this just
parses the option and sets up a few parameters.
Signed-off-by: Simon Glass <sjg@chromium.org>
The device for the root node is normally bound by driver model on init.
With devices being instantiated at build time, we must handle the root
device also.
Add support for processing the root node, which may not have a compatible
string.
Signed-off-by: Simon Glass <sjg@chromium.org>
We only care about uclasses that are actually used. This is determined by
the drivers that use them. Check all the used drivers and build a list of
'valid' uclasses.
Also add references to the uclasses so we can generate C code that uses
them. Attach a uclass to each valid driver.
For the tests, now that we have uclasses we must create an explicit test
for the case where a node does not have one. This should only happen if
the source code does not build, or the source-code scanning fails to find
it.
Signed-off-by: Simon Glass <sjg@chromium.org>
Now that we have the alias information we can assign a sequence number
to each device in the uclass. Store this in the node associated with each
device.
This requires renaming the sandbox test drivers to have the right name.
Note that test coverage is broken with this patch, but fixed in the next
one.
Signed-off-by: Simon Glass <sjg@chromium.org>
If a driver declaration is included in a comment, dtoc currently gets
confused. Update the parser to only consider declarations that begin at
the start of a line. Since multi-line comments begin with an asterisk,
this avoids the problem.
Signed-off-by: Simon Glass <sjg@chromium.org>
Scan the aliases in the device tree to establish the number of devices
within each uclass, and the sequence number of each.
Signed-off-by: Simon Glass <sjg@chromium.org>
If drivers have the same name then we cannot distinguish them. This only
matters if the driver is actually used by dtoc, but in that case, issue
a warning.
Signed-off-by: Simon Glass <sjg@chromium.org>
Instead of using a separate step for this processing, handle it while
scanning its associated driver. This allows us to drop the code coverage
exception in this case.
Note that only files containing drivers are scanned by dtoc, so aliases
declared in a file that doesn't hold a driver will not be noticed. It
would be confusing to put them anywhere other than in the driver that they
relate to, but update the documentation to say this explicitly, just in
case.
Signed-off-by: Simon Glass <sjg@chromium.org>
Typically dtoc can detect the header file needed for a driver by looking
for the structs that it uses. For example, if a driver as a .priv_auto
that uses 'struct serial_priv', then dtoc can search header files for the
definition of that struct and use the file.
In some cases, enums are used in drivers, typically with the .data field
of struct udevice_id. Since dtoc does not support searching for these,
add a way to tell dtoc which header to use. This works as a macro included
in the driver definition.
Signed-off-by: Simon Glass <sjg@chromium.org>
U-Boot operates in several phases, typically TPL, SPL and U-Boot proper.
The latter does not use dtoc.
In some rare cases different drivers are used for two phases. For example,
in TPL it may not be necessary to use the full PCI subsystem, so a simple
driver can be used instead.
This works in the build system simply by compiling in one driver or the
other (e.g. PCI driver + uclass for SPL; simple_bus for TPL). But dtoc has
no way of knowing which code is compiled in for which phase, since it does
not inspect Makefiles or dependency graphs.
So to make this work for dtoc, we need to be able to explicitly mark
drivers with their phase. This is done by adding an empty macro to the
driver. Add support for this in dtoc.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add logic to assign property values to nodes as required by dtoc. The
references allow nodes to refer to each other in C code. The macros used
by dtoc are not yet defined in driver model. They will be added along
with the actual driver model implementation.
Signed-off-by: Simon Glass <sjg@chromium.org>
It is convenient to attach drivers, etc. to nodes so that we can use the
Node object as the main data structure in this module.
Add a function which adds the new properties, along with documentation.
Signed-off-by: Simon Glass <sjg@chromium.org>
These have '_test' suffixes which are not present on the drivers in the
source code. Drop the suffixes to avoid a mismatch when scanning.
Signed-off-by: Simon Glass <sjg@chromium.org>
It is confusing to have the test files in the same places as the
implementation. Move them into a separate directory.
Add a helper function for test_dtoc, to avoid repeating the same
path.
Signed-off-by: Simon Glass <sjg@chromium.org>
Drivers can have private / platform data contained in structs and these
struct definitions are generally kept in header files. In order to
generate build-time devices, dtoc needs to generate code that declares
the data contained in those structs. This generated code must include the
relevant header file, to avoid a build error.
We need a way for dtoc to scan header files for struct definitions. Then,
when it wants to generate code that uses a struct, it can make sure it
includes the correct header file, first.
Add a parser for struct information, similar to drivers. Keep a dict of
the structs that were found.
Signed-off-by: Simon Glass <sjg@chromium.org>
Uclasses can have per-device private / platform data so dtoc needs to
scan these drivers. This allows it to find out the size of this data so
it can be allocated a build time.
Add a parser for uclass information, similar to drivers. Keep a dict of
the uclasses that were found.
Signed-off-by: Simon Glass <sjg@chromium.org>
In order to output variables to hold the priv/plat information used by
each device, dtoc needs to know the struct for each. With this, it can
declare this at build time:
u8 xxx_priv [sizeof(struct <name>)];
Collect the various struct names from the drivers.
Signed-off-by: Simon Glass <sjg@chromium.org>
We should ignore anything in the .git directory or any of the
build-sandbox, etc. directories created by 'make check'. These can confuse
dtoc. Update the code to ignore these.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present most of the tests scan the U-Boot source tree as part of their
run. This information does not change across tests, so we can save time
by remembering it.
Add a way to set up this information and use it for each test, taking a
copy first, so as not to mess up the original.
This reduces the run time from about 1.6 seconds to 1.5 seconds on my
machine. For code coverage (which cannot run in parallel), it reduces from
33 seconds to 5.
Signed-off-by: Simon Glass <sjg@chromium.org>
