LXR linux/arch/arm/mach-at91/at91x40.c

   1/*
   2 * arch/arm/mach-at91/at91x40.c
   3 *
   4 * (C) Copyright 2007, Greg Ungerer <gerg@snapgear.com>
   5 * Copyright (C) 2005 SAN People
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 */
  12
  13#include <linux/kernel.h>
  14#include <linux/init.h>
  15#include <linux/irq.h>
  16#include <linux/io.h>
  17#include <asm/proc-fns.h>
  18#include <asm/system_misc.h>
  19#include <asm/mach/arch.h>
  20#include <mach/at91x40.h>
  21#include <mach/at91_st.h>
  22#include <mach/timex.h>
  23
  24#include "at91_aic.h"
  25#include "generic.h"
  26
  27/*
  28 * Export the clock functions for the AT91X40. Some external code common
  29 * to all AT91 family parts relys on this, like the gpio and serial support.
  30 */
  31int clk_enable(struct clk *clk)
  32{
  33        return 0;
  34}
  35
  36void clk_disable(struct clk *clk)
  37{
  38}
  39
  40unsigned long clk_get_rate(struct clk *clk)
  41{
  42        return AT91X40_MASTER_CLOCK;
  43}
  44
  45static void at91x40_idle(void)
  46{
  47        /*
  48         * Disable the processor clock.  The processor will be automatically
  49         * re-enabled by an interrupt or by a reset.
  50         */
  51        __raw_writel(AT91_PS_CR_CPU, AT91_IO_P2V(AT91_PS_CR));
  52        cpu_do_idle();
  53}
  54
  55void __init at91x40_initialize(unsigned long main_clock)
  56{
  57        arm_pm_idle = at91x40_idle;
  58        at91_extern_irq = (1 << AT91X40_ID_IRQ0) | (1 << AT91X40_ID_IRQ1)
  59                        | (1 << AT91X40_ID_IRQ2);
  60}
  61
  62/*
  63 * The default interrupt priority levels (0 = lowest, 7 = highest).
  64 */
  65static unsigned int at91x40_default_irq_priority[NR_AIC_IRQS] __initdata = {
  66        7,      /* Advanced Interrupt Controller (FIQ) */
  67        0,      /* System Peripherals */
  68        0,      /* USART 0 */
  69        0,      /* USART 1 */
  70        2,      /* Timer Counter 0 */
  71        2,      /* Timer Counter 1 */
  72        2,      /* Timer Counter 2 */
  73        0,      /* Watchdog timer */
  74        0,      /* Parallel IO Controller A */
  75        0,      /* Reserved */
  76        0,      /* Reserved */
  77        0,      /* Reserved */
  78        0,      /* Reserved */
  79        0,      /* Reserved */
  80        0,      /* Reserved */
  81        0,      /* Reserved */
  82        0,      /* External IRQ0 */
  83        0,      /* External IRQ1 */
  84        0,      /* External IRQ2 */
  85};
  86
  87void __init at91x40_init_interrupts(unsigned int priority[NR_AIC_IRQS])
  88{
  89        if (!priority)
  90                priority = at91x40_default_irq_priority;
  91
  92        at91_aic_init(priority, at91_extern_irq);
  93}
  94
  95