1 /* linux/arch/arm/plat-s5p/irq-pm.c
2 *
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
5 *
6 * Based on arch/arm/plat-s3c24xx/irq-pm.c,
7 * Copyright (c) 2003,2004 Simtec Electronics
8 * Ben Dooks <ben@simtec.co.uk>
9 * http://armlinux.simtec.co.uk/
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/interrupt.h>
19
20 #include <plat/cpu.h>
21 #include <plat/irqs.h>
22 #include <plat/pm.h>
23 #include <mach/map.h>
24
25 #include <mach/regs-gpio.h>
26 #include <mach/regs-irq.h>
27
28 /* state for IRQs over sleep */
29
30 /* default is to allow for EINT0..EINT31, and IRQ_RTC_TIC, IRQ_RTC_ALARM,
31 * as wakeup sources
32 *
33 * set bit to 1 in allow bitfield to enable the wakeup settings on it
34 */
35
36 unsigned long s3c_irqwake_intallow = 0x00000006L;
37 unsigned long s3c_irqwake_eintallow = 0xffffffffL;
38
s3c_irq_wake(struct irq_data * data,unsigned int state)39 int s3c_irq_wake(struct irq_data *data, unsigned int state)
40 {
41 unsigned long irqbit;
42
43 switch (data->irq) {
44 case IRQ_RTC_TIC:
45 case IRQ_RTC_ALARM:
46 irqbit = 1 << (data->irq + 1 - IRQ_RTC_ALARM);
47 if (!state)
48 s3c_irqwake_intmask |= irqbit;
49 else
50 s3c_irqwake_intmask &= ~irqbit;
51 break;
52 default:
53 return -ENOENT;
54 }
55 return 0;
56 }
57
58 static struct sleep_save eint_save[] = {
59 SAVE_ITEM(S5P_EINT_CON(0)),
60 SAVE_ITEM(S5P_EINT_CON(1)),
61 SAVE_ITEM(S5P_EINT_CON(2)),
62 SAVE_ITEM(S5P_EINT_CON(3)),
63
64 SAVE_ITEM(S5P_EINT_FLTCON(0)),
65 SAVE_ITEM(S5P_EINT_FLTCON(1)),
66 SAVE_ITEM(S5P_EINT_FLTCON(2)),
67 SAVE_ITEM(S5P_EINT_FLTCON(3)),
68 SAVE_ITEM(S5P_EINT_FLTCON(4)),
69 SAVE_ITEM(S5P_EINT_FLTCON(5)),
70 SAVE_ITEM(S5P_EINT_FLTCON(6)),
71 SAVE_ITEM(S5P_EINT_FLTCON(7)),
72
73 SAVE_ITEM(S5P_EINT_MASK(0)),
74 SAVE_ITEM(S5P_EINT_MASK(1)),
75 SAVE_ITEM(S5P_EINT_MASK(2)),
76 SAVE_ITEM(S5P_EINT_MASK(3)),
77 };
78
s3c24xx_irq_suspend(void)79 int s3c24xx_irq_suspend(void)
80 {
81 s3c_pm_do_save(eint_save, ARRAY_SIZE(eint_save));
82
83 return 0;
84 }
85
s3c24xx_irq_resume(void)86 void s3c24xx_irq_resume(void)
87 {
88 s3c_pm_do_restore(eint_save, ARRAY_SIZE(eint_save));
89 }
90
91