While using the encoded path to a device tree node guarantees a unique
identifier for the corresponding device there is a limit on the number
of characters of that name that can be captured when looking up a
device by name from user mode, and the path can exceed that limit.
Synthesize a unique name from the node dependency ordinal instead, and
update the gen_defines script to record the name associated with the
full path in the extern declaration.
Add a build-time check that no device is created with a name that
violates the user mode requirement.
Also update the network device DTS helper functions to use the same
inference for dev_name and label that the real one does, since they
bypass the real one.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Before we had a bindings index in the documentation, the generated
header file was (somewhat unfortunately) often our best reference for
what a particular binding or property within a binding ends up doing,
so it made good sense to put the description in the generated file.
Now that we have HTML documentation that's a bit more digestible than
the generated file, though, we can just point users at that. Do that
and remove the inline description from the generated file.
This makes it possible to put C-style multiline comments in the
descriptions themselves, which will be done in subsequent patches.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
This macro returns a node's full path, given its node identifier.
The entire path to a node is useful information for the user which can
be added to build-time error messages.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Generate a header (device_extern.h) that handles extern of possible
device structs that would come from devicetree. This removes the need
for DEVICE_DT_DECLARE and DEVICE_DT_INST_DECLARE which we can remove.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
The DTS language permits zeroing out phandles in a phandle array to
say "there's nothing at this index", and dtlib manages that correctly,
but edtlib and gen_defines.py aren't equipped to do so.
Fix this by allowing None elements in the lists of ControllerAndData
values returned by edtlib for such properties.
Handle that in gen_defines.py by setting the generated
DT_N_<node>_P_<prop>_IDX_<i>_EXISTS macro to 0 in such cases.
The DT_N_<node>_P_<prop>_LEN macro still accounts for the entire
length of the phandle-array; it's just that some indexes may be
missing data.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
The edtlib strategy for emitting warnings is to print directly to
standard error. This in turn requires hacks to drop stored references
to stderr in various _warn_file attributes so the EDT objects can be
pickled.
In general, I think it's not really appropriate for library modules
like edtlib to be printing to stderr directly. The user should be able
to configure logging for general utility data munging modules like
this as they please, and not just deciding what file to print to.
Move this around so the standard logging module is used instead. We
can preserve backwards compatibility in gen_defines by customizing the
'edtlib' logging module behavior so it prints the exact same thing it
always has.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Whenever a devicetree binding defines a string property whose
enumerated values are all tokenizable, generate C macros for each
property value that are the corresponding tokens.
Note that "token" is distinct from "identifier": both 'foo' and '123'
are valid tokens, but only 'foo' is a valid identifier. We permit some
strings which are not valid identifiers in anticipation that the
generalization may be useful, e.g. when defining macros that paste the
token onto a prefix that makes the whole thing an identifier.
Fixes: #21273
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
We have a use case for checking the results of a DT_PROP_HAS_IDX()
call with COND_CODE_1(). That won't work because its expansion is an
integer comparison; COND_CODE_1() expects a literal 1 or 0.
Adjust the macro implementation so it expands to a literal 1 or 0.
Make this work even when the index argument needs an expansion while
we're at it.
Fixes: #29833
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Add the first API functions that directly deal with node dependency
ordinals as determined by edtlib:
- DT_DEP_ORD(node_id): node_id's ordinal
- DT_REQUIRES_DEP_ORDS(node_id): list of dep ordinals for node_id's
direct dependencies
- DT_SUPPORTS_DEP_ORDS(node_id): list of dep ordinals for nodes
depending directly on node_id
- DT_INST_ equivalents
This is not meant to be an exhaustive set of macros related to
dependency ordinals; rather, it's a starting out point meant to enable
initial struct device dependency tracking work. We can add more if
needed.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Make the scc_order method a property instead. This is in keeping with
the "General biased advice" at the top of file.
The actual order is therefore lazily initialized in this commit and
the order is not computed by the time __init__() returns. The next
commit will invoke scc_order by the time the constructor returns.
This is preparation work for adding a lookup table from dependency
ordinals to nodes. The combination of these two changes will make
intializing that lookup table a bit easier.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Tell the EDT instance that properties of the /zephyr,user node should
be generated based on the binding types inferred from the property
content.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
We need to save and restore the devicetree data to generate optimized
dependency information later on in the build, in particular during the
final application link.
Make this happen by pickling the EDT object in BUILD_DIR/edt.pickle.
The existence of this file is an implementation detail, so do not add
it to the documentation.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Add DT_NODE_BY_FIXED_PARTITION_LABEL that given a "label" in any
fixed-partitions map will return the node_id for that partition node.
Add DT_NODE_HAS_FIXED_PARTITION_LABEL that will test if a given
fixed-partitions "label" is valid.
Add DT_FIXED_PARTITION_ID that will return an unique ordinal value for
the partition give a node_id to the partition.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
Usually, we want to operate only on "available" device
nodes ("available" means "status is okay and a matching binding is
found"), but that's not true in all cases.
Sometimes we want to operate on special nodes without matching
bindings, such as those describing memory.
To handle the distinction, change various additional devicetree APIs
making it clear that they operate only on available device nodes,
adjusting gen_defines and devicetree.h implementation details
accordingly:
- emit macros for all existing nodes in gen_defines.py, regardless
of status or matching binding
- rename DT_NUM_INST to DT_NUM_INST_STATUS_OKAY
- rename DT_NODE_HAS_COMPAT to DT_NODE_HAS_COMPAT_STATUS_OKAY
- rename DT_INST_FOREACH to DT_INST_FOREACH_STATUS_OKAY
- rename DT_ANY_INST_ON_BUS to DT_ANY_INST_ON_BUS_STATUS_OKAY
- rewrite DT_HAS_NODE_STATUS_OKAY in terms of a new DT_NODE_HAS_STATUS
- resurrect DT_HAS_NODE in the form of DT_NODE_EXISTS
- remove DT_COMPAT_ON_BUS as a public API
- use the new default_prop_types edtlib parameter
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Even though it is about to be done for sound technical reasons, a
subsequent patch adding access to all device nodes at the last minute
in the 2.3 release is going to be playing a bit of a fast one on
the Zephyr community, especially users of DT_INST APIs.
In particular, instance numbers are currently allocated only to
enabled nodes, but that will not be true soon: *every* node of a
compatible will be allocated an instance number, even disabled ones.
This is especially unfortunate for drivers and applications that
expect singletons of their compatibles, and use DT_INST(0, ...) to
mean "the one enabled instance of my compatible".
To avoid gratuitous breakage, let's prepare for that by sorting each
edt.compat2nodes sub-list so that enabled instances always come before
disabled ones.
This doesn't break any API guarantees, because there basically *are*
no ordering guarantees, in part precisely to give us the flexibility
to do things like this. And it does help patterns that use instances 0
through N-1, including the important singleton case.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
The macro iterates through the list of child nodes and invokes provided
macro for each node.
Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
Remove semicolon between instance invocations of DT_FOREACH_IMPL_ and
thus DT_INST_FOREACH. This provides more flexibility to the user. This
requires we fixup in tree users to add semicolon where needed.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
If a devicetree node doesn't have a matching binding we will at least
populate a common standard set of properties for that node. The list of
standard properties is:
compatible
status
reg
reg-names
label
interrupt
interrupts-extended
interrupt-names
interrupt-controller
This allows us to handle cases like memory nodes that don't have any
compatible property, we can still generate the reg values.
We limit this to known properties as for any other property we can not
fully determine the property type without a binding and thus we can't
ensure the generation for that property is correct or may not change.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Always generate the comment text specifying a node's path identifier.
Add the DT_ prefix so it matches the actual macro usable from C. This
will make a following patch which adds support for accessing a node's
parent result in a generated header file which is easier to read.
Put the node's path right after "Devicetree node:" in the comment.
This makes the section for that node easier to grep for.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
The root node's z_path_id value for the duration of this script
doesn't match the value DT_ROOT is defined to in devicetree.h.
I didn't notice this because the root node's compatible doesn't have a
matching binding in practice, so no macros are generated for it, but
we're about to start looking at node parents explicitly and this is an
issue for that. Fix it so the root node's z_path_id is "N", since
DT_ROOT is the token "DT_N".
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Add generation of the following macros:
DT_N_<node-id>_REG_IDX_<idx>_EXISTS 1
DT_N_<node-id>_IRQ_IDX_<idx>_EXISTS 1
This will allow us to use IS_ENABLED() in DT_REG_HAS_IDX and
DT_IRQ_HAS_IDX which matches behavior of other DT_*_HAS_* macros as
well as lets use these with COND_CODE_1.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
Add generation of the following macros:
DT_N_<node-id>_P_<prop-id>_NAME_<NAME>_EXISTS
DT_N_<node-id>_P_<prop-id>_IDX_<idx>_EXISTS
This will be useful to check availability of named or indexed
property like dmas/dma-names.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Due to the use of UTIL_EVAL*() macros, the UTIL_LISTIFY() macro used
by DT_INST_FOREACH(foo) can cause long build errors when there is a
build error in the expansion for "foo". More than a thousand lines of
build error output have been observed for an error in a single line of
faulty C.
To improve the situation, re-work the implementation details so the
errors are a bit shorter and easier to read. The use of COND_CODE_1
still makes the error messages quite long, due to GCC generating notes
for various intermediate expansions (__DEBRACKET,
__GET_ARG_2_DEBRACKET, __COND_CODE, Z_COND_CODE_1, COND_CODE1), but
it's better than the long list of UTIL_EVAL notes.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
And implement DT_ANY_INST_ON_BUS() in terms of it.
This makes some error messages quite a bit shorter by avoiding
UTIL_LISTIFY(), which has a nasty temper and tends to explode if not
treated gently.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
We get the following error:
ValueError: max() arg is an empty sequence
if the compatiable section of the device tree is empty or doesn't exist.
Fix this by havingin max_len get a default value of 0.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This is joint work with Kumar Gala (see signed-off-by).
This supports a new devicetree macro syntax coming. It's not really
worth mixing up the old and the new generation scripts into one file,
because:
- we aim to remove support for the old macros at some point, so it
will be cleaner to start fresh with a new script based on the old one
that only generates the new syntax
- it will avoid regressions to leave the existing code alone while
we're moving users to the new names
Keep the existing script by moving it to gen_legacy_defines.py and
changing a few comments and strings around. It's responsible for
generating:
- devicetree.conf: only needed by deprecated kconfigfunctions
- devicetree_legacy_unfixed.h: "old" devicetree_unfixed.h macros
Put a new gen_defines.py in its place. It generates:
- zephyr.dts
- devicetree_unfixed.h in the new syntax
Include devicetree_legacy_unfixed.h from devicetree.h so no DT users
are affected by this change.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This rename is mostly to easy git managment and review so any changes or
the addition of the new gen_defines.py doesn't look like a diff against
the old code if you look at just that commit.
We keep changes to a minimum to just keep things building with the
renamed gen_legacy_defines.py.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
Pad node identifiers to 60 characters. This results in better
alignment in practice than the current value of 40, which is a bit
low.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
This too is an attempt to reimplement the previous behavior exactly,
modulo the order in which things are defined.
This is the last function which is calling into the previous
implementation's out_node and node_*_alias() functions, so these can
be removed now.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
This is similar to the work already done for regs.
Other than the order in which they appear and comments, the output
before and after this patch should be exactly the same.
We're intentionally leaving some of the helpers in module scope here
to use some of the subroutines elsewhere later on when reworking
write_spi_dev().
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Mirror the change already done to write_regs().
Other than the order in which they appear and comments, the output
before and after this patch should be exactly the same.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Use augmented nodes to print macros grouped by namespace.
Other than the order in which they appear and comments, the output
before and after this patch should be exactly the same.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Group the macros together by namespace rather than putting all the
BASE_ADDRESS macros together and all the SIZE macros together. E.g.,
all the DT_INST_<x> namespace macros for each node now appear
consecutively.
Add a comment making it clear that this output comes from "regs",
since "BASE_ADDRESS" and "SIZE" are not property names.
Other than the order in which they appear and comments, the output
before and after this patch should be exactly the same.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Add additional attributes to each edtlib.Node we process, before
calling into the write_foo() routines.
This includes the identifier returned by node_ident(), which is used
as the primary identifier for the node, as well as lists for instance
and aliases nodes, and a catchall list that contains all the other
identifiers in addition to the primary one.
Use this information in a new for_each_ident(node, ident) def that
will be put to use in the various write_foo() routines.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
spi_dev_cs_gpio() takes a Node and returns the chip select GPIO for it.
Having that information available directly from Node is neater, so turn
it into a Node.spi_cs_gpio property instead.
That gets rid of the only public global function in edtlib, which might
make the API design clearer too.
Tested with the sensortile_box board, which uses SPI chip select.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
It's better to allow per-instance EDT configuration than to set a global
variable on the edtlib module. Enable/disable the warning for reg/unit
address mismatches via a flag to EDT.__init__(), instead of via a global
variable. That makes it consistent too.
Another option would be to pass the 'dtc' flags to EDT.__init__(), but
it makes the interface a bit ugly. Maybe if it needs to emulate lots of
other flags later.
Clarify that edtlib itself isn't meant to have any state in the comment
at the top of the module.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Add a 'deprecation_msg' string/flag to out_dev(). When 'deprecation_msg'
is passed, all generated macros include
__WARN(<deprecation_msg>)
which prints a custom warning if the macro is used.
Meant to be used when improving the output format.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Peter Bigot
Martí Bolívar
Kumar Gala
Dominik Ermel
Erwan Gouriou
Ulf Magnusson