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


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/* 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);
}