Vendor and model name helpers

Macros
#define	DT_NODE_VENDOR_BY_IDX(node_id, idx)
	Get the vendor at index idx as a string literal.
#define	DT_NODE_VENDOR_HAS_IDX(node_id, idx)
	Does a node's compatible property have a vendor at an index?
#define	DT_NODE_VENDOR_BY_IDX_OR(node_id, idx, default_value)
	Like DT_NODE_VENDOR_BY_IDX(), but with a fallback to default_value.
#define	DT_NODE_VENDOR_OR(node_id, default_value)
	Get the node's (only) vendor as a string literal.
#define	DT_NODE_MODEL_BY_IDX(node_id, idx)
	Get the model at index "idx" as a string literal.
#define	DT_NODE_MODEL_HAS_IDX(node_id, idx)
	Does a node's compatible property have a model at an index?
#define	DT_NODE_MODEL_BY_IDX_OR(node_id, idx, default_value)
	Like DT_NODE_MODEL_BY_IDX(), but with a fallback to default_value.
#define	DT_NODE_MODEL_OR(node_id, default_value)
	Get the node's (only) model as a string literal.

Detailed Description

Macro Definition Documentation

DT_NODE_MODEL_BY_IDX

#define DT_NODE_MODEL_BY_IDX	(		node_id,
			idx )

#include <zephyr/devicetree.h>

Value:

        DT_CAT3(node_id, _COMPAT_MODEL_IDX_, idx)

Get the model at index "idx" as a string literal.

The model is a string extracted from the compatible after the vendor prefix.

Example vendor-prefixes.txt:

 vnd        A stand-in for a real vendor
 zephyr     Zephyr-specific binding

Example devicetree fragment:

 n1: node-1 {
    compatible = "vnd,model1", "gpio", "zephyr,model2";
 };

Example usage:

 DT_NODE_MODEL_BY_IDX(DT_NODELABEL(n1), 0) // "model1"
 DT_NODE_MODEL_BY_IDX(DT_NODELABEL(n1), 2) // "model2"

Notice that the compatible at index 1 doesn't match any entries in the vendor prefix file and therefore index 1 is not a valid model index. Use DT_NODE_MODEL_HAS_IDX(node_id, idx) to determine if an index is valid.

Parameters

node_id	node identifier
idx	index of the model to return

Returns

string literal of the idx-th model

DT_NODE_MODEL_BY_IDX_OR

#define DT_NODE_MODEL_BY_IDX_OR	(		node_id,
			idx,
			default_value )

#include <zephyr/devicetree.h>

Value:

        COND_CODE_1(DT_NODE_MODEL_HAS_IDX(node_id, idx), \
                    (DT_NODE_MODEL_BY_IDX(node_id, idx)), (default_value))

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

If the value exists, this expands to DT_NODE_MODEL_BY_IDX(node_id, idx). The default_value parameter is not expanded in this case.

Otherwise, this expands to default_value.

Parameters

node_id	node identifier
idx	index of the model to return

Returns

string literal of the idx-th model

Parameters

default_value

a fallback value to expand to

Returns

string literal of the idx-th model or "default_value"

DT_NODE_MODEL_HAS_IDX

#define DT_NODE_MODEL_HAS_IDX	(		node_id,
			idx )

#include <zephyr/devicetree.h>

Value:

        IS_ENABLED(DT_CAT4(node_id, _COMPAT_MODEL_IDX_, idx, _EXISTS))

Does a node's compatible property have a model at an index?

If this returns 1, then DT_NODE_MODEL_BY_IDX(node_id, idx) is valid. If it returns 0, it is an error to use DT_NODE_MODEL_BY_IDX(node_id, idx) with index "idx".

Parameters

node_id	node identifier
idx	index of the model to check

Returns

1 if "idx" is a valid model index, 0 otherwise.

DT_NODE_MODEL_OR

#define DT_NODE_MODEL_OR	(		node_id,
			default_value )

#include <zephyr/devicetree.h>

Value:

        DT_NODE_MODEL_BY_IDX_OR(node_id, 0, default_value)

Get the node's (only) model as a string literal.

Equivalent to DT_NODE_MODEL_BY_IDX_OR(node_id, 0, default_value).

Parameters

node_id	node identifier
default_value	a fallback value to expand to

DT_NODE_VENDOR_BY_IDX

#define DT_NODE_VENDOR_BY_IDX	(		node_id,
			idx )

#include <zephyr/devicetree.h>

Value:

        DT_CAT3(node_id, _COMPAT_VENDOR_IDX_, idx)

Get the vendor at index idx as a string literal.

The vendor is a string extracted from vendor prefixes if an entry exists that matches the node's compatible prefix. There may be as many as one vendor prefixes file per directory in DTS_ROOT.

Example vendor-prefixes.txt:

 vnd        A stand-in for a real vendor
 zephyr     Zephyr-specific binding

Example devicetree fragment:

n1: node-1 {
   compatible = "vnd,model1", "gpio", "zephyr,model2";
};

Example usage:

DT_NODE_VENDOR_BY_IDX(DT_NODELABEL(n1), 0) // "A stand-in for a real vendor"
DT_NODE_VENDOR_BY_IDX(DT_NODELABEL(n1), 2) // "Zephyr-specific binding"

Notice that the compatible at index 1 doesn't match any entries in the vendor prefix file and therefore index 1 is not a valid vendor index. Use DT_NODE_VENDOR_HAS_IDX(node_id, idx) to determine if an index is valid.

Parameters

node_id	node identifier
idx	index of the vendor to return

Returns

string literal of the idx-th vendor

DT_NODE_VENDOR_BY_IDX_OR

#define DT_NODE_VENDOR_BY_IDX_OR	(		node_id,
			idx,
			default_value )

#include <zephyr/devicetree.h>

Value:

        COND_CODE_1(DT_NODE_VENDOR_HAS_IDX(node_id, idx), \
                    (DT_NODE_VENDOR_BY_IDX(node_id, idx)), (default_value))

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

If the value exists, this expands to DT_NODE_VENDOR_BY_IDX(node_id, idx). The default_value parameter is not expanded in this case.

Otherwise, this expands to default_value.

Parameters

node_id	node identifier
idx	index of the vendor to return

Returns

string literal of the idx-th vendor

Parameters

default_value

a fallback value to expand to

Returns

string literal of the idx-th vendor or "default_value"

DT_NODE_VENDOR_HAS_IDX

#define DT_NODE_VENDOR_HAS_IDX	(		node_id,
			idx )

#include <zephyr/devicetree.h>

Value:

        IS_ENABLED(DT_CAT4(node_id, _COMPAT_VENDOR_IDX_, idx, _EXISTS))

Does a node's compatible property have a vendor at an index?

If this returns 1, then DT_NODE_VENDOR_BY_IDX(node_id, idx) is valid. If it returns 0, it is an error to use DT_NODE_VENDOR_BY_IDX(node_id, idx) with index idx.

Parameters

node_id	node identifier
idx	index of the vendor to check

Returns

1 if idx is a valid vendor index, 0 otherwise.

DT_NODE_VENDOR_OR

#define DT_NODE_VENDOR_OR	(		node_id,
			default_value )

#include <zephyr/devicetree.h>

Value:

        DT_NODE_VENDOR_BY_IDX_OR(node_id, 0, default_value)

Get the node's (only) vendor as a string literal.

Equivalent to DT_NODE_VENDOR_BY_IDX_OR(node_id, 0, default_value).

Parameters

node_id	node identifier
default_value	a fallback value to expand to