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wakeup-mask.c

/* arch/arm/plat-samsung/wakeup-mask.c
 *
 * Copyright 2010 Ben Dooks <ben-linux@fluff.org>
 *
 * Support for wakeup mask interrupts on newer SoCs
 *
 * 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/kernel.h>
#include <linux/spinlock.h>
#include <linux/sysdev.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/io.h>

#include <plat/wakeup-mask.h>
#include <plat/pm.h>

void samsung_sync_wakemask(void __iomem *reg,
                     struct samsung_wakeup_mask *mask, int nr_mask)
{
      struct irq_desc *desc;
      u32 val;

      val = __raw_readl(reg);

      for (; nr_mask > 0; nr_mask--, mask++) {
            if (mask->irq == NO_WAKEUP_IRQ) {
                  val |= mask->bit;
                  continue;
            }

            desc = irq_to_desc(mask->irq);

            /* bit of a liberty to read this directly from irq_desc. */
            if (desc->wake_depth > 0)
                  val &= ~mask->bit;
            else
                  val |= mask->bit;
      }

      printk(KERN_INFO "wakemask %08x => %08x\n", __raw_readl(reg), val);
      __raw_writel(val, reg);
}

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