wakeup-mask.c

Go to the documentation of this file.

/* arch/arm/plat-samsung/wakeup-mask.c
 *
 * Copyright 2010 Ben Dooks <[email protected]>
 *
 * 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/device.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_data *data;
    u32 val;

    val = __raw_readl(reg);

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

        data = irq_get_irq_data(mask->irq);

        /* bit of a liberty to read this directly from irq_data. */
        if (irqd_is_wakeup_set(data))
            val &= ~mask->bit;
        else
            val |= mask->bit;
    }

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