cfe196fbed
The nvmem interface helps provider of nvmem data to expose themselves to consumer. NVMEM is generally present on some embedded board in a form of eeprom or fuses. The nvmem api are helpers for consumer to read/write the cell data from a provider. Differential Revision: https://reviews.freebsd.org/D16419
68 lines
1.9 KiB
Objective-C
68 lines
1.9 KiB
Objective-C
#-
|
|
# Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
|
|
#
|
|
# 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
|
|
#
|
|
# $FreeBSD$
|
|
#
|
|
|
|
INTERFACE nvmem;
|
|
|
|
#
|
|
# Default implementations of some methods.
|
|
#
|
|
CODE {
|
|
static int
|
|
null_nvmem_read(device_t dev __unused, uint32_t offset __unused, uint32_t size __unused, uint8_t *buffer __unused)
|
|
{
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
static int
|
|
null_nvmem_write(device_t dev __unused, uint32_t offset __unused, uint32_t size __unused, uint8_t *buffer __unused)
|
|
{
|
|
|
|
return (ENXIO);
|
|
}
|
|
};
|
|
|
|
#
|
|
# Read
|
|
#
|
|
METHOD int read {
|
|
device_t dev;
|
|
uint32_t offset;
|
|
uint32_t size;
|
|
uint8_t *buffer;
|
|
} DEFAULT null_nvmem_read;
|
|
|
|
#
|
|
# Write
|
|
#
|
|
METHOD int write {
|
|
device_t dev;
|
|
uint32_t offset;
|
|
uint32_t size;
|
|
uint8_t *buffer;
|
|
} DEFAULT null_nvmem_write;
|