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devicetree.h: Rework DT_ANY_INST_HAS_PROP_STATUS_OKAY 

The macro is searching for all instances of specific device
that contain specific property and evaluates to true (1) if
any device does.
The macro used to do that by generating, using
DT_ANY_INST_HAS_PROP_STATUS_OKAY, a logical expression
like (0 || 1 || 0), where each digit represented existence of
property (1) or lack of it (0).
Unfortunately other util macros, like IS_ENABLED, were
not able to evaluate such expression, as they often simply
expect something they can evaluate to 0 or 1.

The commit here changes DT_ANY_INST_HAS_PROP_STATUS_OKAY
to generate a list of tokens (1) where token is added to list
only for instance of a device that has the property;
then such list is processed using IS_EMPTY() macro and
in the end 0 or 1 is generated, depending on whether
any enabled instance of a device has the property or not.
This change allows result of DT_ANY_INST_HAS_PROP_STATUS_OKAY
to be used with macros like IS_ENABLED, IF_ENABLED or
COND_CODE_x.

Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>
This commit is contained in:
Dominik Ermel 2024-03-18 16:28:57 +00:00 committed by Fabio Baltieri
parent c3b96ffbab
commit 4c8ed7dd9a
2 changed files with 48 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
include/zephyr/devicetree.h
View File

@ -4192,7 +4192,7 @@
* @endcode
*/
#define DT_ANY_INST_HAS_PROP_STATUS_OKAY(prop) \
(DT_INST_FOREACH_STATUS_OKAY_VARGS(DT_INST_NODE_HAS_PROP_AND_OR, prop) 0)
COND_CODE_1(IS_EMPTY(DT_ANY_INST_HAS_PROP_STATUS_OKAY_(prop)), (0), (1))
/**
* @brief Call @p fn on all nodes with compatible `DT_DRV_COMPAT`
@ -4427,6 +4427,34 @@
/** @cond INTERNAL_HIDDEN */
/** @brief Helper for DT_ANY_INST_HAS_PROP_STATUS_OKAY_
*
* This macro generates token "1," for instance of a device,
* identified by index @p idx, if instance has property @p prop.
*
* @param idx instance number
* @param prop property to check for
*
* @return Macro evaluates to `1,` if instance has the property,
* otherwise it evaluates to literal nothing.
*/
#define DT_ANY_INST_HAS_PROP_STATUS_OKAY__(idx, prop) \
COND_CODE_1(DT_INST_NODE_HAS_PROP(idx, prop), (1,), ())
/** @brief Helper for DT_ANY_INST_HAS_PROP_STATUS_OKAY
*
* This macro uses DT_ANY_INST_HAS_PROP_STATUS_OKAY_ with
* DT_INST_FOREACH_STATUS_OKAY_VARG to generate comma separated list of 1,
* where each 1 on the list represents instance that has a property
* @p prop; the list may be empty, and the upper bound on number of
* list elements is number of device instances.
*
* @param prop property to check
*
* @return Evaluates to list of 1s (e.g: 1,1,1,) or nothing.
*/
#define DT_ANY_INST_HAS_PROP_STATUS_OKAY_(prop) \
DT_INST_FOREACH_STATUS_OKAY_VARGS(DT_ANY_INST_HAS_PROP_STATUS_OKAY__, prop)
#define DT_PATH_INTERNAL(...) \
UTIL_CAT(DT_ROOT, MACRO_MAP_CAT(DT_S_PREFIX, __VA_ARGS__))
/** @brief DT_PATH_INTERNAL() helper: prepends _S_ to a node name

19
tests/lib/devicetree/api/src/main.c
View File

@ -190,6 +190,25 @@ ZTEST(devicetree_api, test_any_inst_prop)
zassert_equal(DT_ANY_INST_HAS_PROP_STATUS_OKAY(bar), 1, "");
zassert_equal(DT_ANY_INST_HAS_PROP_STATUS_OKAY(baz), 0, "");
zassert_equal(DT_ANY_INST_HAS_PROP_STATUS_OKAY(does_not_exist), 0, "");
zassert_equal(COND_CODE_1(DT_ANY_INST_HAS_PROP_STATUS_OKAY(foo),
(5), (6)),
5, "");
zassert_equal(COND_CODE_0(DT_ANY_INST_HAS_PROP_STATUS_OKAY(foo),
(5), (6)),
6, "");
zassert_equal(COND_CODE_1(DT_ANY_INST_HAS_PROP_STATUS_OKAY(baz),
(5), (6)),
6, "");
zassert_equal(COND_CODE_0(DT_ANY_INST_HAS_PROP_STATUS_OKAY(baz),
(5), (6)),
5, "");
zassert_true(IS_ENABLED(DT_ANY_INST_HAS_PROP_STATUS_OKAY(foo)), "");
zassert_true(!IS_ENABLED(DT_ANY_INST_HAS_PROP_STATUS_OKAY(baz)), "");
zassert_equal(IF_ENABLED(DT_ANY_INST_HAS_PROP_STATUS_OKAY(foo), (1)) + 1,
2, "");
zassert_equal(IF_ENABLED(DT_ANY_INST_HAS_PROP_STATUS_OKAY(baz), (1)) + 1,
1, "");
}
ZTEST(devicetree_api, test_default_prop_access)