1.\" - 2.\" SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3.\" 4.\" Copyright (c) 2021 Semihalf 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd August 19, 2021 29.Dt DEVICE_GET_PROPERTY 9 30.Os 31.Sh NAME 32.Nm device_get_property , 33.Nm device_has_property 34.Nd access device specific data 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/bus.h 38.Ft ssize_t 39.Fn device_get_property "device_t dev" "const char *prop" "void *val" "size_t sz" 40.Ft bool 41.Fn device_has_property "device_t dev" "const char *prop" 42.Sh DESCRIPTION 43Access device specific data provided by the parent bus. 44Drivers can use these properties to obtain device capabilities and set 45necessary quirks. 46.Sh NOTES 47You can pass NULL as pointer to property's value when calling 48.Fn device_get_property 49to obtain its size. 50.Pp 51Currently this interface is implemented by 52.Xr simplebus 4 53and 54.Xr acpi 4 . 55.Sh RETURN VALUES 56.Fn device_get_property 57if successful returns property's size, otherwise returns -1. 58.Pp 59.Fn device_has_property 60returns true if given property was found. 61.Sh SEE ALSO 62.Xr acpi 4 , 63.Xr simplebus 4 , 64.Xr device 9 65.Sh AUTHORS 66This manual page was written by 67.An Bartlomiej Grzesik . 68