arch/arm/mach-s3c/simtec-pm.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright 2004 Simtec Electronics
   4 //      Ben Dooks <ben@simtec.co.uk>
   5 //
   6 // http://armlinux.simtec.co.uk/
   7 //
   8 // Power Management helpers for Simtec S3C24XX implementations
   9
  10 #include <linux/kernel.h>
  11 #include <linux/types.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/list.h>
  14 #include <linux/timer.h>
  15 #include <linux/init.h>
  16 #include <linux/device.h>
  17 #include <linux/io.h>
  18
  19 #include <asm/mach/arch.h>
  20 #include <asm/mach/map.h>
  21
  22 #include "map.h"
  23 #include "regs-gpio.h"
  24
  25 #include <asm/mach-types.h>
  26
  27 #include "pm.h"
  28
  29 #include "regs-mem-s3c24xx.h"
  30
  31 #define COPYRIGHT ", Copyright 2005 Simtec Electronics"
  32
  33 /* pm_simtec_init
  34  *
  35  * enable the power management functions
  36 */
  37
  38 static __init int pm_simtec_init(void)
  39 {
  40         unsigned long gstatus4;
  41
  42         /* check which machine we are running on */
  43
  44         if (!machine_is_bast() && !machine_is_vr1000() &&
  45             !machine_is_anubis() && !machine_is_osiris() &&
  46             !machine_is_aml_m5900())
  47                 return 0;
  48
  49         printk(KERN_INFO "Simtec Board Power Management" COPYRIGHT "\n");
  50
  51         gstatus4  = (__raw_readl(S3C2410_BANKCON7) & 0x3) << 30;
  52         gstatus4 |= (__raw_readl(S3C2410_BANKCON6) & 0x3) << 28;
  53         gstatus4 |= (__raw_readl(S3C2410_BANKSIZE) & S3C2410_BANKSIZE_MASK);
  54
  55         __raw_writel(gstatus4, S3C2410_GSTATUS4);
  56
  57         return s3c_pm_init();
  58 }
  59
  60 arch_initcall(pm_simtec_init);