reg property

Macros
#define	DT_NUM_REGS(node_id)   DT_CAT(node_id, _REG_NUM)
	Get the number of register blocks in the reg property. More...
#define	DT_REG_HAS_IDX(node_id, idx)    IS_ENABLED(DT_CAT(node_id, _REG_IDX_##idx##_EXISTS))
	Is "idx" a valid register block index? More...
#define	DT_REG_ADDR_BY_IDX(node_id, idx)    DT_CAT(node_id, _REG_IDX_##idx##_VAL_ADDRESS)
	Get the base address of the register block at index "idx". More...
#define	DT_REG_SIZE_BY_IDX(node_id, idx)    DT_CAT(node_id, _REG_IDX_##idx##_VAL_SIZE)
	Get the size of the register block at index "idx". More...
#define	DT_REG_ADDR(node_id)   DT_REG_ADDR_BY_IDX(node_id, 0)
	Get a node's (only) register block address. More...
#define	DT_REG_SIZE(node_id)   DT_REG_SIZE_BY_IDX(node_id, 0)
	Get a node's (only) register block size. More...
#define	DT_REG_ADDR_BY_NAME(node_id, name)    DT_CAT(node_id, _REG_NAME_##name##_VAL_ADDRESS)
	Get a register block's base address by name. More...
#define	DT_REG_SIZE_BY_NAME(node_id, name)    DT_CAT(node_id, _REG_NAME_##name##_VAL_SIZE)
	Get a register block's size by name. More...

Detailed Description

Macro Definition Documentation

DT_NUM_REGS

#define DT_NUM_REGS

(

node_id

)

DT_CAT(node_id, _REG_NUM)

#include <include/devicetree.h>

Get the number of register blocks in the reg property.

Use this instead of DT_PROP_LEN(node_id, reg).

Parameters

node_id

node identifier

Returns

Number of register blocks in the node's "reg" property.

DT_REG_ADDR

#define DT_REG_ADDR

(

node_id

)

DT_REG_ADDR_BY_IDX(node_id, 0)

#include <include/devicetree.h>

Get a node's (only) register block address.

Equivalent to DT_REG_ADDR_BY_IDX(node_id, 0).

Parameters

node_id

node identifier

Returns

node's register block address

DT_REG_ADDR_BY_IDX

#define DT_REG_ADDR_BY_IDX	(		node_id,
			idx
	)		DT_CAT(node_id, _REG_IDX_##idx##_VAL_ADDRESS)

#include <include/devicetree.h>

Get the base address of the register block at index "idx".

Parameters

node_id	node identifier
idx	index of the register whose address to return

Returns

address of the idx-th register block

DT_REG_ADDR_BY_NAME

#define DT_REG_ADDR_BY_NAME	(		node_id,
			name
	)		DT_CAT(node_id, _REG_NAME_##name##_VAL_ADDRESS)

#include <include/devicetree.h>

Get a register block's base address by name.

Parameters

node_id	node identifier
name	lowercase-and-underscores register specifier name

Returns

address of the register block specified by name

DT_REG_HAS_IDX

#define DT_REG_HAS_IDX	(		node_id,
			idx
	)		IS_ENABLED(DT_CAT(node_id, _REG_IDX_##idx##_EXISTS))

#include <include/devicetree.h>

Is "idx" a valid register block index?

If this returns 1, then DT_REG_ADDR_BY_IDX(node_id, idx) or DT_REG_SIZE_BY_IDX(node_id, idx) are valid. If it returns 0, it is an error to use those macros with index "idx".

Parameters

node_id	node identifier
idx	index to check

Returns

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

DT_REG_SIZE

#define DT_REG_SIZE

(

node_id

)

DT_REG_SIZE_BY_IDX(node_id, 0)

#include <include/devicetree.h>

Get a node's (only) register block size.

Equivalent to DT_REG_SIZE_BY_IDX(node_id, 0).

Parameters

node_id

node identifier

Returns

node's only register block's size

DT_REG_SIZE_BY_IDX

#define DT_REG_SIZE_BY_IDX	(		node_id,
			idx
	)		DT_CAT(node_id, _REG_IDX_##idx##_VAL_SIZE)

#include <include/devicetree.h>

Get the size of the register block at index "idx".

This is the size of an individual register block, not the total number of register blocks in the property; use DT_NUM_REGS() for that.

Parameters

node_id	node identifier
idx	index of the register whose size to return

Returns

size of the idx-th register block

DT_REG_SIZE_BY_NAME

#define DT_REG_SIZE_BY_NAME	(		node_id,
			name
	)		DT_CAT(node_id, _REG_NAME_##name##_VAL_SIZE)

#include <include/devicetree.h>

Get a register block's size by name.

Parameters

node_id	node identifier
name	lowercase-and-underscores register specifier name

Returns

size of the register block specified by name