/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
18void __init
19ppc4xx_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}