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irq-pm.c

/* linux/arch/arm/plat-s5p/irq-pm.c
 *
 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
 *          http://www.samsung.com
 *
 * Based on arch/arm/plat-s3c24xx/irq-pm.c,
 * Copyright (c) 2003,2004 Simtec Electronics
 *    Ben Dooks <ben@simtec.co.uk>
 *    http://armlinux.simtec.co.uk/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/

#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/sysdev.h>

#include <plat/cpu.h>
#include <plat/irqs.h>
#include <plat/pm.h>
#include <mach/map.h>

#include <mach/regs-gpio.h>
#include <mach/regs-irq.h>

/* state for IRQs over sleep */

/* default is to allow for EINT0..EINT31, and IRQ_RTC_TIC, IRQ_RTC_ALARM,
 * as wakeup sources
 *
 * set bit to 1 in allow bitfield to enable the wakeup settings on it
*/

unsigned long s3c_irqwake_intallow  = 0x00000006L;
unsigned long s3c_irqwake_eintallow = 0xffffffffL;

int s3c_irq_wake(struct irq_data *data, unsigned int state)
{
      unsigned long irqbit;

      switch (data->irq) {
      case IRQ_RTC_TIC:
      case IRQ_RTC_ALARM:
            irqbit = 1 << (data->irq + 1 - IRQ_RTC_ALARM);
            if (!state)
                  s3c_irqwake_intmask |= irqbit;
            else
                  s3c_irqwake_intmask &= ~irqbit;
            break;
      default:
            return -ENOENT;
      }
      return 0;
}

static struct sleep_save eint_save[] = {
      SAVE_ITEM(S5P_EINT_CON(0)),
      SAVE_ITEM(S5P_EINT_CON(1)),
      SAVE_ITEM(S5P_EINT_CON(2)),
      SAVE_ITEM(S5P_EINT_CON(3)),

      SAVE_ITEM(S5P_EINT_FLTCON(0)),
      SAVE_ITEM(S5P_EINT_FLTCON(1)),
      SAVE_ITEM(S5P_EINT_FLTCON(2)),
      SAVE_ITEM(S5P_EINT_FLTCON(3)),
      SAVE_ITEM(S5P_EINT_FLTCON(4)),
      SAVE_ITEM(S5P_EINT_FLTCON(5)),
      SAVE_ITEM(S5P_EINT_FLTCON(6)),
      SAVE_ITEM(S5P_EINT_FLTCON(7)),

      SAVE_ITEM(S5P_EINT_MASK(0)),
      SAVE_ITEM(S5P_EINT_MASK(1)),
      SAVE_ITEM(S5P_EINT_MASK(2)),
      SAVE_ITEM(S5P_EINT_MASK(3)),
};

int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
{
      s3c_pm_do_save(eint_save, ARRAY_SIZE(eint_save));

      return 0;
}

int s3c24xx_irq_resume(struct sys_device *dev)
{
      s3c_pm_do_restore(eint_save, ARRAY_SIZE(eint_save));

      return 0;
}


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