nulldev.c

来自「AT91所有开发板的资料 AT91所有开发板的资料」· C语言 代码 · 共 48 行

/* -*-C-*-
 *
 * Copyright (c) 1996 Advanced RISC Machines Limited
 * All Rights Reserved
 *
 * $Revision: 1.1 $
 *   $Author: mwelsh $
 *     $Date: 1999/06/29 10:16:51 $
 *
 * nulldev.c:  Place-holding, do-nothing driver for Angel
 */
#include "devices.h"
#include "devdriv.h"

/*
 *  Function: Nulldev
 *   Purpose: Do nothing function that returns an OK condition
 *
 *    Params: None
 *
 *   Returns: DE_OKAY
 */
static DevError Nulldev(void)
{
    return DE_OKAY;
}

/**********************************************************************/

const struct angel_DeviceEntry angel_NullDevice =
{
    DT_ANGEL,
    {
        (angel_DeviceWriteFn)Nulldev,
        (angel_DeviceRegisterReadFn)Nulldev
    },
    (angel_DeviceControlFn)Nulldev,
    0,
    {
        0, NULL
    },
    {
        0, NULL
    }
};

/* EOF nulldev.c */