1 /* linux/arch/arm/mach-s5p64x0/irq-pm.c
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
6 * S5P64X0 - Interrupt handling Power Management
8 * Based on arch/arm/mach-s3c64xx/irq-pm.c by Ben Dooks
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/syscore_ops.h>
16 #include <linux/serial_core.h>
17 #include <linux/serial_s3c.h>
22 #include <mach/regs-gpio.h>
24 static struct sleep_save irq_save[] = {
25 SAVE_ITEM(S5P64X0_EINT0CON0),
26 SAVE_ITEM(S5P64X0_EINT0FLTCON0),
27 SAVE_ITEM(S5P64X0_EINT0FLTCON1),
28 SAVE_ITEM(S5P64X0_EINT0MASK),
31 static struct irq_grp_save {
37 #ifdef CONFIG_SERIAL_SAMSUNG
38 static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
41 static int s5p64x0_irq_pm_suspend(void)
43 struct irq_grp_save *grp = eint_grp_save;
46 S3C_PMDBG("%s: suspending IRQs\n", __func__);
48 s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
50 #ifdef CONFIG_SERIAL_SAMSUNG
51 for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
52 irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
55 for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
56 grp->con = __raw_readl(S5P64X0_EINT12CON + (i * 4));
57 grp->mask = __raw_readl(S5P64X0_EINT12MASK + (i * 4));
58 grp->fltcon = __raw_readl(S5P64X0_EINT12FLTCON + (i * 4));
64 static void s5p64x0_irq_pm_resume(void)
66 struct irq_grp_save *grp = eint_grp_save;
69 S3C_PMDBG("%s: resuming IRQs\n", __func__);
71 s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
73 #ifdef CONFIG_SERIAL_SAMSUNG
74 for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
75 __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
78 for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
79 __raw_writel(grp->con, S5P64X0_EINT12CON + (i * 4));
80 __raw_writel(grp->mask, S5P64X0_EINT12MASK + (i * 4));
81 __raw_writel(grp->fltcon, S5P64X0_EINT12FLTCON + (i * 4));
84 S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
87 static struct syscore_ops s5p64x0_irq_syscore_ops = {
88 .suspend = s5p64x0_irq_pm_suspend,
89 .resume = s5p64x0_irq_pm_resume,
92 static int __init s5p64x0_syscore_init(void)
94 register_syscore_ops(&s5p64x0_irq_syscore_ops);
98 core_initcall(s5p64x0_syscore_init);