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 
samsung_sync_wakemask(void __iomem * reg,struct samsung_wakeup_mask * mask,int nr_mask)22 void 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