7772cec6bd
When we have an empty Devicetree, ie,
```
/dts-v1/;
/ {
};
```
The node's dep_ordinal is never initialized because the node graph is
empty. This ends up with invalid ordinal tokens (-1) in
devicetree_generated.h which in turn produce some cryptic compiler
errors, see e.g.
```
error: pasting "dts_ord_" and "-" does not give a valid preprocessing
token
95 | #define Z_DEVICE_DT_DEV_ID(node_id) _CONCAT(dts_ord_,
DT_DEP_ORD(node_id))
...
include/zephyr/devicetree.h:2498:41:
note: in expansion of macro 'DT_FOREACH_OKAY_HELPER'
2498 | #define DT_FOREACH_STATUS_OKAY_NODE(fn)
DT_FOREACH_OKAY_HELPER(fn)
|
^~~~~~~~~~~~~~~~~~~~~~
include/zephyr/device.h:1022:1:
note: in expansion of macro 'DT_FOREACH_STATUS_OKAY_NODE'
1022 |
DT_FOREACH_STATUS_OKAY_NODE(Z_MAYBE_DEVICE_DECLARE_INTERNAL)
```
(devicetree_generated.h)
```
...
#define DT_N_ORD -1
#define DT_N_ORD_STR_SORTABLE 000-1
...
```
This patch makes sure root node is always inserted (without any target)
so that it gets initialized later.
Discovered as part of
https://github.com/zephyrproject-rtos/zephyr/pull/63696
Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
|
||
|---|---|---|
| .. | ||
| python-devicetree | ||
| README.txt | ||
| gen_defines.py | ||
| gen_driver_kconfig_dts.py | ||
| gen_dts_cmake.py | ||
README.txt
This directory used to contain the edtlib.py and dtlib.py libraries
and tests, alongside the gen_defines.py script that uses them for
converting DTS to the C macros used by Zephyr.
The libraries and tests have now been moved to the 'python-devicetree'
subdirectory.
We are now in the process of extracting edtlib and dtlib into a
standalone source code library that we intend to share with other
projects.
Links related to the work making this standalone:
https://pypi.org/project/devicetree/
https://python-devicetree.readthedocs.io/en/latest/
https://github.com/zephyrproject-rtos/python-devicetree
The 'python-devicetree' subdirectory you find here next to this
README.txt matches the standalone python-devicetree repository linked
above.
For now, the 'main' copy will continue to be hosted here in the zephyr
repository. We will mirror changes into the standalone repository as
needed; you can just ignore it for now.
Code in the zephyr repository which needs these libraries will import
devicetree.edtlib from now on, but the code will continue to be found
by manipulating sys.path for now.
Eventually, as APIs stabilize, the python-devicetree code in this
repository will disappear, and a standalone repository will be the
'main' one.