iokit/Kernel/PMmisc.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 #include <IOKit/pwr_mgt/IOPM.h>
  26 #include <IOKit/IOService.h>
  27
  28 extern "C" {
  29 extern void kprintf(const char *, ...);
  30 }
  31
  32 static char rootDomain[ ] = "IOPMrootDomain";
  33 static char displayDevice[ ] = "IODisplayWrangler";
  34 static bool rootRegistered;
  35 static bool displayRegistered;
  36 static IOService * root;
  37 static IOService * display;
  38
  39 void IOPMLog(const char * who,unsigned long event,unsigned long param1, unsigned long param2)
  40 {
  41 //    kprintf("%s %02d %08x %08x\n",who,event,param1,param2);
  42 }
  43
  44
  45 void IOPMRegisterDevice(const char * who, IOService * theDevice)
  46 {
  47
  48     if ( strcmp(rootDomain,who) == 0 ) {                        // root power domain is registering
  49         theDevice->youAreRoot();
  50         rootRegistered = true;
  51         root = theDevice;
  52         if ( displayRegistered ) {
  53             root->addChild ( display );
  54         }
  55     }
  56     else{
  57         if ( strcmp(displayDevice,who) == 0 ) {                 // somebody else is registering
  58             displayRegistered = true;                           // save pointer to display wrangler
  59             display = theDevice;
  60         }
  61         if ( rootRegistered ) {                                 // if not root domain, then it's
  62             root->addChild ( theDevice );                               // one of its children
  63         }
  64     }
  65 }
  66