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 62