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SPDX-License-Identifier: BSD-2-Clause
Copyright (c) 2021 Semihalf
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.Dd February 18, 2022 .Dt BUS_GET_PROPERTY 9 .Os .Sh NAME .Nm BUS_GET_PROPERTY .Nd get child's specific property .Sh SYNOPSIS n sys/param.h n sys/bus.h .Ft ssize_t .Fn BUS_GET_PROPERTY "device_t dev" "device_t child" "const char *propname" \ "void *propvalue" "size_t size" "device_property_type_t type" .Sh DESCRIPTION The .Fn BUS_GET_PROPERTY method is called from driver code which wants to access a child's specific data stored on the bus. A property has a name and an associated value. Implementation shall copy to .Fa propvalue at most .Fa size bytes.
SPDX-License-Identifier: BSD-2-Clause
Copyright (c) 2021 Semihalf
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.Dd February 18, 2022 .Dt BUS_GET_PROPERTY 9 .Os .Sh NAME .Nm BUS_GET_PROPERTY .Nd get child's specific property .Sh SYNOPSIS n sys/param.h n sys/bus.h .Ft ssize_t .Fn BUS_GET_PROPERTY "device_t dev" "device_t child" "const char *propname" \ "void *propvalue" "size_t size" "device_property_type_t type" .Sh DESCRIPTION The .Fn BUS_GET_PROPERTY method is called from driver code which wants to access a child's specific data stored on the bus. A property has a name and an associated value. Implementation shall copy to .Fa propvalue at most .Fa size bytes.
p .Fn BUS_GET_PROPERTY supports different property types specified via the .Fa type argument. The .Fa size is guaranteed to be a multiple of the underlying property type. If a type is not supported, .Fn BUS_GET_PROPERTY shall return -1. .Sh NOTES If .Fa propvalue is NULL or .Fa size is zero, the implementation shall return only the size of the property. .Sh RETURN VALUES The property size if successful, otherwise -1. .Sh SEE ALSO .Xr device 9 , .Xr device_get_property 9 .Sh AUTHORS This manual page was written by .An Bartlomiej Grzesik .