x86/efi: Enforce CONFIG_RELOCATABLE for EFI boot stub
[linux/fpc-iii.git] / arch / arm / mach-s3c64xx / irq-pm.c
blobc3da1b68d03e0b352490b0df0e5ee8f1741ad87f
1 /* arch/arm/plat-s3c64xx/irq-pm.c
3 * Copyright 2008 Openmoko, Inc.
4 * Copyright 2008 Simtec Electronics
5 * Ben Dooks <ben@simtec.co.uk>
6 * http://armlinux.simtec.co.uk/
8 * S3C64XX - Interrupt handling Power Management
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/kernel.h>
16 #include <linux/syscore_ops.h>
17 #include <linux/interrupt.h>
18 #include <linux/serial_core.h>
19 #include <linux/irq.h>
20 #include <linux/io.h>
22 #include <mach/map.h>
24 #include <plat/regs-serial.h>
25 #include <mach/regs-gpio.h>
26 #include <plat/cpu.h>
27 #include <plat/pm.h>
29 /* We handled all the IRQ types in this code, to save having to make several
30 * small files to handle each different type separately. Having the EINT_GRP
31 * code here shouldn't be as much bloat as the IRQ table space needed when
32 * they are enabled. The added benefit is we ensure that these registers are
33 * in the same state as we suspended.
36 static struct sleep_save irq_save[] = {
37 SAVE_ITEM(S3C64XX_PRIORITY),
38 SAVE_ITEM(S3C64XX_EINT0CON0),
39 SAVE_ITEM(S3C64XX_EINT0CON1),
40 SAVE_ITEM(S3C64XX_EINT0FLTCON0),
41 SAVE_ITEM(S3C64XX_EINT0FLTCON1),
42 SAVE_ITEM(S3C64XX_EINT0FLTCON2),
43 SAVE_ITEM(S3C64XX_EINT0FLTCON3),
44 SAVE_ITEM(S3C64XX_EINT0MASK),
47 static struct irq_grp_save {
48 u32 fltcon;
49 u32 con;
50 u32 mask;
51 } eint_grp_save[5];
53 static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
55 static int s3c64xx_irq_pm_suspend(void)
57 struct irq_grp_save *grp = eint_grp_save;
58 int i;
60 S3C_PMDBG("%s: suspending IRQs\n", __func__);
62 s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
64 for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
65 irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
67 for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
68 grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4));
69 grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4));
70 grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4));
73 return 0;
76 static void s3c64xx_irq_pm_resume(void)
78 struct irq_grp_save *grp = eint_grp_save;
79 int i;
81 S3C_PMDBG("%s: resuming IRQs\n", __func__);
83 s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
85 for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
86 __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
88 for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
89 __raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4));
90 __raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4));
91 __raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4));
94 S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
97 static struct syscore_ops s3c64xx_irq_syscore_ops = {
98 .suspend = s3c64xx_irq_pm_suspend,
99 .resume = s3c64xx_irq_pm_resume,
102 static __init int s3c64xx_syscore_init(void)
104 register_syscore_ops(&s3c64xx_irq_syscore_ops);
106 return 0;
109 core_initcall(s3c64xx_syscore_init);