LXR linux/arch/arm/plat-samsung/wakeup-mask.c

   1/* arch/arm/plat-samsung/wakeup-mask.c
   2 *
   3 * Copyright 2010 Ben Dooks <ben-linux@fluff.org>
   4 *
   5 * Support for wakeup mask interrupts on newer SoCs
   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 version 2 as
   9 * published by the Free Software Foundation.
  10*/
  11
  12#include <linux/kernel.h>
  13#include <linux/spinlock.h>
  14#include <linux/device.h>
  15#include <linux/types.h>
  16#include <linux/irq.h>
  17#include <linux/io.h>
  18
  19#include <plat/wakeup-mask.h>
  20#include <plat/pm.h>
  21
  22void samsung_sync_wakemask(void __iomem *reg,
  23                           struct samsung_wakeup_mask *mask, int nr_mask)
  24{
  25        struct irq_data *data;
  26        u32 val;
  27
  28        val = __raw_readl(reg);
  29
  30        for (; nr_mask > 0; nr_mask--, mask++) {
  31                if (mask->irq == NO_WAKEUP_IRQ) {
  32                        val |= mask->bit;
  33                        continue;
  34                }
  35
  36                data = irq_get_irq_data(mask->irq);
  37
  38                /* bit of a liberty to read this directly from irq_data. */
  39                if (irqd_is_wakeup_set(data))
  40                        val &= ~mask->bit;
  41                else
  42                        val |= mask->bit;
  43        }
  44
  45        printk(KERN_INFO "wakemask %08x => %08x\n", __raw_readl(reg), val);
  46        __raw_writel(val, reg);
  47}
  48