iokit/Kernel/PMmisc.cpp

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