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dts: Add _OR variant macro for DT_PROP_BY_PHANDLE_IDX

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Like DT_PROP_BY_PHANDLE_IDX(), but with a fallback to
default_value.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
This commit is contained in:
Flavio Ceolin 2020-11-25 22:03:23 -08:00 • committed by Anas Nashif
commit f7776edd7a
1 changed files with 22 additions and 0 deletions
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22
include/devicetree.h
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@ -596,6 +596,28 @@
#define DT_PROP_BY_PHANDLE_IDX(node_id, phs, idx, prop) \
DT_PROP(DT_PHANDLE_BY_IDX(node_id, phs, idx), prop)
/**
* @brief Like DT_PROP_BY_PHANDLE_IDX(), but with a fallback to
* default_value.
*
* If the value exists, this expands to DT_PROP_BY_PHANDLE_IDX(node_id, phs,
* idx, prop). The default_value parameter is not expanded in this
* case.
*
* Otherwise, this expands to default_value.
*
* @param node_id node identifier
* @param phs lowercase-and-underscores property with type "phandle",
* "phandles", or "phandle-array"
* @param idx logical index into "phs", which must be zero if "phs"
* has type "phandle"
* @param prop lowercase-and-underscores property of the phandle's node
* @param default_value a fallback value to expand to
* @return the property's value
*/
#define DT_PROP_BY_PHANDLE_IDX_OR(node_id, phs, idx, prop, default_value) \
DT_PROP_OR(DT_PHANDLE_BY_IDX(node_id, phs, idx), prop, default_value)
/**
* @brief Get a property value from a phandle's node
*