1#-
2# Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions
6# are met:
7# 1. Redistributions of source code must retain the above copyright
8#    notice, this list of conditions and the following disclaimer.
9# 2. Redistributions in binary form must reproduce the above copyright
10#    notice, this list of conditions and the following disclaimer in the
11#    documentation and/or other materials provided with the distribution.
12#
13# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23# SUCH DAMAGE.
24#
25#
26
27INTERFACE nvmem;
28
29#
30# Default implementations of some methods.
31#
32CODE {
33	static int
34	null_nvmem_read(device_t dev __unused, uint32_t offset __unused, uint32_t size __unused, uint8_t *buffer __unused)
35	{
36
37		return (ENXIO);
38	}
39
40	static int
41	null_nvmem_write(device_t dev __unused, uint32_t offset __unused, uint32_t size __unused, uint8_t *buffer __unused)
42	{
43
44		return (ENXIO);
45	}
46};
47
48#
49# Read
50#
51METHOD int read {
52	device_t dev;
53	uint32_t offset;
54	uint32_t size;
55	uint8_t *buffer;
56} DEFAULT null_nvmem_read;
57
58#
59# Write
60#
61METHOD int write {
62	device_t dev;
63	uint32_t offset;
64	uint32_t size;
65	uint8_t *buffer;
66} DEFAULT null_nvmem_write;
67