Manual Pages  — DEVICE_GET_PROPERTY

device_get_property, device_has_property – access device specific data

SYNOPSIS DESCRIPTION NOTES RETURN VALUES SEE ALSO AUTHORS

#include <sys/param.h>

#include <sys/bus.h>

ssize_t
device_get_property(device_t dev, const char *prop, void *val, size_t sz);

"device_property_type_t type"
bool
device_has_property(device_t dev, const char *prop);

Access device specific data provided by the parent bus. Drivers can use these properties to obtain device capabilities and set necessary quirks.

The underlying property type is specified with the type argument. Currently the following types are supported:

DEVICE_PROP_BUFFER
	The underlying property is a string of bytes.
DEVICE_PROP_ANY	Wildcard property type.
DEVICE_PROP_HANDLE
	Following a reference the underlying property is a handle of the respective bus.
DEVICE_PROP_UINT32
	The underlying property is an array of unsigned 32 bit integers. The sz argument shall be a multiple of 4.
DEVICE_PROP_UINT64
	The underlying property is an array of unsigned 64 bit integers. The sz argument shall be a multiple of 8.

device_get_property() if successful returns property's size, otherwise returns -1.

device_has_property() returns true if given property was found.

This manual page was written by Bartlomiej Grzesik.