arch/ppc/syslib/ppc4xx_pm.c

   1 /*
   2  * Author: Armin Kuster <akuster@mvista.com>
   3  *
   4  * 2002 (c) MontaVista, Software, Inc.  This file is licensed under
   5  * the terms of the GNU General Public License version 2.  This program
   6  * is licensed "as is" without any warranty of any kind, whether express
   7  * or implied.
   8  *
   9  * This an attempt to get Power Management going for the IBM 4xx processor.
  10  * This was derived from the ppc4xx._setup.c file
  11  */
  12
  13 #include <linux/config.h>
  14 #include <linux/init.h>
  15
  16 #include <asm/ibm4xx.h>
  17
  18 void __init
  19 ppc4xx_pm_init(void)
  20 {
  21
  22         unsigned int value = 0;
  23
  24         /* turn off unused hardware to save power */
  25 #ifdef CONFIG_405GP
  26         value |= CPM_DCP;       /* CodePack */
  27 #endif
  28
  29 #if !defined(CONFIG_IBM_OCP_GPIO)
  30         value |= CPM_GPIO0;
  31 #endif
  32
  33 #if !defined(CONFIG_PPC405_I2C_ADAP)
  34         value |= CPM_IIC0;
  35 #ifdef CONFIG_STB03xxx
  36         value |= CPM_IIC1;
  37 #endif
  38 #endif
  39
  40
  41 #if !defined(CONFIG_405_DMA)
  42         value |= CPM_DMA;
  43 #endif
  44
  45         mtdcr(DCRN_CPMFR, value);
  46
  47 }