fdt_wrapper.h File Reference

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Macros
#define	__packed   __attribute__((__packed__))
#define	__aligned(x)   __attribute__((__aligned__(x)))
#define	MAX_LEVEL   32 /* how deeply nested we will go */
#define	SCRATCHPAD   1024 /* bytes of scratchpad memory */
#define	CMD_FDT_MAX_DUMP   64

Functions
int	fdt_print (unsigned char *working_fdt, const char *pathp, char *prop, int depth)
	Print the contents of the device tree at the specified path with a given property and depth.
int	fdt_parse_prop (char const **newval, int count, char *data, int *len)
	Parse the property values in the data buffer and return the new value pointers and lengths.
int	fdt_increase_size (void *fdt, int add_len)
	Increase the size of the flattened device tree by adding additional length.
: name of the subnode to locate
fdt_find_or_add_subnode() - find or possibly add a subnode of a given node @fdt: pointer to the device tree blob @parentoffset: structure block offset of a node fdt_subnode_offset() finds a subnode of the node with a given name. If the subnode does not exist, it will be created.
int	fdt_find_or_add_subnode (void *fdt, int parentoffset, const char *name)
int	fdt_overlay_apply_verbose (void *fdt, void *fdto)
	fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting

Macro Definition Documentation

__aligned

#define __aligned

(

x

)

__attribute__((__aligned__(x)))

__packed

#define __packed   __attribute__((__packed__))

CMD_FDT_MAX_DUMP

#define CMD_FDT_MAX_DUMP   64

MAX_LEVEL

#define MAX_LEVEL   32 /* how deeply nested we will go */

SCRATCHPAD

#define SCRATCHPAD   1024 /* bytes of scratchpad memory */

Function Documentation

fdt_find_or_add_subnode()

int fdt_find_or_add_subnode	(	void *	fdt,
		int	parentoffset,
		const char *	name
	)

fdt_increase_size()

int fdt_increase_size	(	void *	fdt,
		int	add_len
	)

Increase the size of the flattened device tree by adding additional length.

Parameters

fdt	The pointer to the flattened device tree.
add_len	The additional length to be added to the device tree.

Returns

0 success, other fail

fdt_overlay_apply_verbose()

int fdt_overlay_apply_verbose	(	void *	fdt,
		void *	fdto
	)

fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting

@fdt: ptr to device tree @fdto: ptr to device tree overlay

Convenience function to apply an overlay and display helpful messages in the case of an error

fdt_parse_prop()

int fdt_parse_prop	(	char const **	newval,
		int	count,
		char *	data,
		int *	len
	)

Parse the property values in the data buffer and return the new value pointers and lengths.

Parameters

newval	The pointer to store the new value pointers.
count	The number of properties in the data buffer.
data	The buffer containing the property values.
len	The pointer to store the length of each property value.

Returns

The number of parsed properties.

fdt_print()

int fdt_print	(	unsigned char *	working_fdt,
		const char *	pathp,
		char *	prop,
		int	depth
	)

Print the contents of the device tree at the specified path with a given property and depth.

Parameters

working_fdt	The pointer to the device tree.
pathp	The path of the node to start printing from.
prop	The property name to print.
depth	The maximum depth to traverse while printing.

Returns

The number of printed properties.