arch/arm/mach-at91/at91rm9200.c

   1 /*
   2  * arch/arm/mach-at91/at91rm9200.c
   3  *
   4  *  Copyright (C) 2005 SAN People
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/clk/at91_pmc.h>
  15
  16 #include <asm/mach/map.h>
  17 #include <asm/system_misc.h>
  18 #include <mach/at91_st.h>
  19 #include <mach/hardware.h>
  20
  21 #include "soc.h"
  22 #include "generic.h"
  23
  24 static void at91rm9200_idle(void)
  25 {
  26         /*
  27          * Disable the processor clock.  The processor will be automatically
  28          * re-enabled by an interrupt or by a reset.
  29          */
  30         at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
  31 }
  32
  33 static void at91rm9200_restart(enum reboot_mode reboot_mode, const char *cmd)
  34 {
  35         /*
  36          * Perform a hardware reset with the use of the Watchdog timer.
  37          */
  38         at91_st_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
  39         at91_st_write(AT91_ST_CR, AT91_ST_WDRST);
  40 }
  41
  42 /* --------------------------------------------------------------------
  43  *  AT91RM9200 processor initialization
  44  * -------------------------------------------------------------------- */
  45 static void __init at91rm9200_map_io(void)
  46 {
  47         /* Map peripherals */
  48         at91_init_sram(0, AT91RM9200_SRAM_BASE, AT91RM9200_SRAM_SIZE);
  49 }
  50
  51 static void __init at91rm9200_initialize(void)
  52 {
  53         arm_pm_idle = at91rm9200_idle;
  54         arm_pm_restart = at91rm9200_restart;
  55 }
  56
  57
  58 AT91_SOC_START(at91rm9200)
  59         .map_io = at91rm9200_map_io,
  60         .init = at91rm9200_initialize,
  61 AT91_SOC_END