Zephyr API Documentation  3.7.0-rc3
A Scalable Open Source RTOS
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Devicetree DMA API

Macros

#define DT_DMAS_CTLR_BY_IDX(node_id, idx)   DT_PHANDLE_BY_IDX(node_id, dmas, idx)
 Get the node identifier for the DMA controller from a dmas property at an index.
 
#define DT_DMAS_CTLR_BY_NAME(node_id, name)    DT_PHANDLE_BY_NAME(node_id, dmas, name)
 Get the node identifier for the DMA controller from a dmas property by name.
 
#define DT_DMAS_CTLR(node_id)   DT_DMAS_CTLR_BY_IDX(node_id, 0)
 Equivalent to DT_DMAS_CTLR_BY_IDX(node_id, 0)
 
#define DT_INST_DMAS_CTLR_BY_IDX(inst, idx)    DT_DMAS_CTLR_BY_IDX(DT_DRV_INST(inst), idx)
 Get the node identifier for the DMA controller from a DT_DRV_COMPAT instance's dmas property at an index.
 
#define DT_INST_DMAS_CTLR_BY_NAME(inst, name)    DT_DMAS_CTLR_BY_NAME(DT_DRV_INST(inst), name)
 Get the node identifier for the DMA controller from a DT_DRV_COMPAT instance's dmas property by name.
 
#define DT_INST_DMAS_CTLR(inst)   DT_INST_DMAS_CTLR_BY_IDX(inst, 0)
 Equivalent to DT_INST_DMAS_CTLR_BY_IDX(inst, 0)
 
#define DT_DMAS_CELL_BY_IDX(node_id, idx, cell)    DT_PHA_BY_IDX(node_id, dmas, idx, cell)
 Get a DMA specifier's cell value at an index.
 
#define DT_INST_DMAS_CELL_BY_IDX(inst, idx, cell)    DT_PHA_BY_IDX(DT_DRV_INST(inst), dmas, idx, cell)
 Get a DT_DRV_COMPAT instance's DMA specifier's cell value at an index.
 
#define DT_DMAS_CELL_BY_NAME(node_id, name, cell)    DT_PHA_BY_NAME(node_id, dmas, name, cell)
 Get a DMA specifier's cell value by name.
 
#define DT_INST_DMAS_CELL_BY_NAME(inst, name, cell)    DT_DMAS_CELL_BY_NAME(DT_DRV_INST(inst), name, cell)
 Get a DT_DRV_COMPAT instance's DMA specifier's cell value by name.
 
#define DT_DMAS_HAS_IDX(node_id, idx)    IS_ENABLED(DT_CAT4(node_id, _P_dmas_IDX_, idx, _EXISTS))
 Is index "idx" valid for a dmas property?
 
#define DT_INST_DMAS_HAS_IDX(inst, idx)    DT_DMAS_HAS_IDX(DT_DRV_INST(inst), idx)
 Is index "idx" valid for a DT_DRV_COMPAT instance's dmas property?
 
#define DT_DMAS_HAS_NAME(node_id, name)    DT_PROP_HAS_NAME(node_id, dmas, name)
 Does a dmas property have a named element?
 
#define DT_INST_DMAS_HAS_NAME(inst, name)    DT_DMAS_HAS_NAME(DT_DRV_INST(inst), name)
 Does a DT_DRV_COMPAT instance's dmas property have a named element?
 

Detailed Description

Macro Definition Documentation

◆ DT_DMAS_CELL_BY_IDX

#define DT_DMAS_CELL_BY_IDX (   node_id,
  idx,
  cell 
)     DT_PHA_BY_IDX(node_id, dmas, idx, cell)

#include <zephyr/devicetree/dma.h>

Get a DMA specifier's cell value at an index.

Example devicetree fragment:

dma1: dma@... {
        compatible = "vnd,dma";
        #dma-cells = <2>;
};

dma2: dma@... {
        compatible = "vnd,dma";
        #dma-cells = <2>;
};

n: node {
    dmas = <&dma1 1 0x400>,
           <&dma2 6 0x404>;
};

Bindings fragment for the vnd,dma compatible:

dma-cells:
  - channel
  - config

Example usage:

DT_DMAS_CELL_BY_IDX(DT_NODELABEL(n), 0, channel) // 1
DT_DMAS_CELL_BY_IDX(DT_NODELABEL(n), 1, channel) // 6
DT_DMAS_CELL_BY_IDX(DT_NODELABEL(n), 0, config) // 0x400
DT_DMAS_CELL_BY_IDX(DT_NODELABEL(n), 1, config) // 0x404
Parameters
node_idnode identifier for a node with a dmas property
idxlogical index into dmas property
celllowercase-and-underscores cell name
Returns
the cell value at index "idx"
See also
DT_PHA_BY_IDX()

◆ DT_DMAS_CELL_BY_NAME

#define DT_DMAS_CELL_BY_NAME (   node_id,
  name,
  cell 
)     DT_PHA_BY_NAME(node_id, dmas, name, cell)

#include <zephyr/devicetree/dma.h>

Get a DMA specifier's cell value by name.

Example devicetree fragment:

dma1: dma@... {
        compatible = "vnd,dma";
        #dma-cells = <2>;
};

dma2: dma@... {
        compatible = "vnd,dma";
        #dma-cells = <2>;
};

n: node {
    dmas = <&dma1 1 0x400>,
           <&dma2 6 0x404>;
    dma-names = "tx", "rx";
};

Bindings fragment for the vnd,dma compatible:

dma-cells:
  - channel
  - config

Example usage:

DT_DMAS_CELL_BY_NAME(DT_NODELABEL(n), tx, channel) // 1
DT_DMAS_CELL_BY_NAME(DT_NODELABEL(n), rx, channel) // 6
DT_DMAS_CELL_BY_NAME(DT_NODELABEL(n), tx, config) // 0x400
DT_DMAS_CELL_BY_NAME(DT_NODELABEL(n), rx, config) // 0x404
Parameters
node_idnode identifier for a node with a dmas property
namelowercase-and-underscores name of a dmas element as defined by the node's dma-names property
celllowercase-and-underscores cell name
Returns
the cell value in the specifier at the named element
See also
DT_PHA_BY_NAME()

◆ DT_DMAS_CTLR

#define DT_DMAS_CTLR (   node_id)    DT_DMAS_CTLR_BY_IDX(node_id, 0)

#include <zephyr/devicetree/dma.h>

Equivalent to DT_DMAS_CTLR_BY_IDX(node_id, 0)

Parameters
node_idnode identifier for a node with a dmas property
Returns
the node identifier for the DMA controller at index 0 in the node's "dmas" property
See also
DT_DMAS_CTLR_BY_IDX()

◆ DT_DMAS_CTLR_BY_IDX

#define DT_DMAS_CTLR_BY_IDX (   node_id,
  idx 
)    DT_PHANDLE_BY_IDX(node_id, dmas, idx)

#include <zephyr/devicetree/dma.h>

Get the node identifier for the DMA controller from a dmas property at an index.

Example devicetree fragment:

dma1: dma@... { ... };

dma2: dma@... { ... };

n: node {
    dmas = <&dma1 1 2 0x400 0x3>,
            <&dma2 6 3 0x404 0x5>;
};

Example usage:

DT_DMAS_CTLR_BY_IDX(DT_NODELABEL(n), 0) // DT_NODELABEL(dma1)
DT_DMAS_CTLR_BY_IDX(DT_NODELABEL(n), 1) // DT_NODELABEL(dma2)
Parameters
node_idnode identifier for a node with a dmas property
idxlogical index into dmas property
Returns
the node identifier for the DMA controller referenced at index "idx"
See also
DT_PROP_BY_PHANDLE_IDX()

◆ DT_DMAS_CTLR_BY_NAME

#define DT_DMAS_CTLR_BY_NAME (   node_id,
  name 
)     DT_PHANDLE_BY_NAME(node_id, dmas, name)

#include <zephyr/devicetree/dma.h>

Get the node identifier for the DMA controller from a dmas property by name.

Example devicetree fragment:

dma1: dma@... { ... };

dma2: dma@... { ... };

n: node {
    dmas = <&dma1 1 2 0x400 0x3>,
            <&dma2 6 3 0x404 0x5>;
    dma-names = "tx", "rx";
};

Example usage:

DT_DMAS_CTLR_BY_NAME(DT_NODELABEL(n), tx) // DT_NODELABEL(dma1)
DT_DMAS_CTLR_BY_NAME(DT_NODELABEL(n), rx) // DT_NODELABEL(dma2)
Parameters
node_idnode identifier for a node with a dmas property
namelowercase-and-underscores name of a dmas element as defined by the node's dma-names property
Returns
the node identifier for the DMA controller in the named element
See also
DT_PHANDLE_BY_NAME()

◆ DT_DMAS_HAS_IDX

#define DT_DMAS_HAS_IDX (   node_id,
  idx 
)     IS_ENABLED(DT_CAT4(node_id, _P_dmas_IDX_, idx, _EXISTS))

#include <zephyr/devicetree/dma.h>

Is index "idx" valid for a dmas property?

Parameters
node_idnode identifier for a node with a dmas property
idxlogical index into dmas property
Returns
1 if the "dmas" property has index "idx", 0 otherwise

◆ DT_DMAS_HAS_NAME

#define DT_DMAS_HAS_NAME (   node_id,
  name 
)     DT_PROP_HAS_NAME(node_id, dmas, name)

#include <zephyr/devicetree/dma.h>

Does a dmas property have a named element?

Parameters
node_idnode identifier for a node with a dmas property
namelowercase-and-underscores name of a dmas element as defined by the node's dma-names property
Returns
1 if the dmas property has the named element, 0 otherwise

◆ DT_INST_DMAS_CELL_BY_IDX

#define DT_INST_DMAS_CELL_BY_IDX (   inst,
  idx,
  cell 
)     DT_PHA_BY_IDX(DT_DRV_INST(inst), dmas, idx, cell)

#include <zephyr/devicetree/dma.h>

Get a DT_DRV_COMPAT instance's DMA specifier's cell value at an index.

Parameters
instDT_DRV_COMPAT instance number
idxlogical index into dmas property
celllowercase-and-underscores cell name
Returns
the cell value at index "idx"
See also
DT_DMAS_CELL_BY_IDX()

◆ DT_INST_DMAS_CELL_BY_NAME

#define DT_INST_DMAS_CELL_BY_NAME (   inst,
  name,
  cell 
)     DT_DMAS_CELL_BY_NAME(DT_DRV_INST(inst), name, cell)

#include <zephyr/devicetree/dma.h>

Get a DT_DRV_COMPAT instance's DMA specifier's cell value by name.

Parameters
instDT_DRV_COMPAT instance number
namelowercase-and-underscores name of a dmas element as defined by the node's dma-names property
celllowercase-and-underscores cell name
Returns
the cell value in the specifier at the named element
See also
DT_DMAS_CELL_BY_NAME()

◆ DT_INST_DMAS_CTLR

#define DT_INST_DMAS_CTLR (   inst)    DT_INST_DMAS_CTLR_BY_IDX(inst, 0)

#include <zephyr/devicetree/dma.h>

Equivalent to DT_INST_DMAS_CTLR_BY_IDX(inst, 0)

Parameters
instDT_DRV_COMPAT instance number
Returns
the node identifier for the DMA controller at index 0 in the instance's "dmas" property
See also
DT_DMAS_CTLR_BY_IDX()

◆ DT_INST_DMAS_CTLR_BY_IDX

#define DT_INST_DMAS_CTLR_BY_IDX (   inst,
  idx 
)     DT_DMAS_CTLR_BY_IDX(DT_DRV_INST(inst), idx)

#include <zephyr/devicetree/dma.h>

Get the node identifier for the DMA controller from a DT_DRV_COMPAT instance's dmas property at an index.

Parameters
instDT_DRV_COMPAT instance number
idxlogical index into dmas property
Returns
the node identifier for the DMA controller referenced at index "idx"
See also
DT_DMAS_CTLR_BY_IDX()

◆ DT_INST_DMAS_CTLR_BY_NAME

#define DT_INST_DMAS_CTLR_BY_NAME (   inst,
  name 
)     DT_DMAS_CTLR_BY_NAME(DT_DRV_INST(inst), name)

#include <zephyr/devicetree/dma.h>

Get the node identifier for the DMA controller from a DT_DRV_COMPAT instance's dmas property by name.

Parameters
instDT_DRV_COMPAT instance number
namelowercase-and-underscores name of a dmas element as defined by the node's dma-names property
Returns
the node identifier for the DMA controller in the named element
See also
DT_DMAS_CTLR_BY_NAME()

◆ DT_INST_DMAS_HAS_IDX

#define DT_INST_DMAS_HAS_IDX (   inst,
  idx 
)     DT_DMAS_HAS_IDX(DT_DRV_INST(inst), idx)

#include <zephyr/devicetree/dma.h>

Is index "idx" valid for a DT_DRV_COMPAT instance's dmas property?

Parameters
instDT_DRV_COMPAT instance number
idxlogical index into dmas property
Returns
1 if the "dmas" property has a specifier at index "idx", 0 otherwise

◆ DT_INST_DMAS_HAS_NAME

#define DT_INST_DMAS_HAS_NAME (   inst,
  name 
)     DT_DMAS_HAS_NAME(DT_DRV_INST(inst), name)

#include <zephyr/devicetree/dma.h>

Does a DT_DRV_COMPAT instance's dmas property have a named element?

Parameters
instDT_DRV_COMPAT instance number
namelowercase-and-underscores name of a dmas element as defined by the node's dma-names property
Returns
1 if the dmas property has the named element, 0 otherwise