Root/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/sysdev.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_desc *desc;
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        desc = irq_to_desc(mask->irq);
37
38        /* bit of a liberty to read this directly from irq_desc. */
39        if (desc->wake_depth > 0)
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

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