irq-pm.c
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/* linux/arch/arm/mach-s5p64x0/irq-pm.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* S5P64X0 - Interrupt handling Power Management
*
* Based on arch/arm/mach-s3c64xx/irq-pm.c by Ben Dooks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/syscore_ops.h>
#include <linux/serial_core.h>
#include <linux/io.h>
#include <plat/regs-serial.h>
#include <plat/pm.h>
#include <mach/regs-gpio.h>
static struct sleep_save irq_save[] = {
SAVE_ITEM(S5P64X0_EINT0CON0),
SAVE_ITEM(S5P64X0_EINT0FLTCON0),
SAVE_ITEM(S5P64X0_EINT0FLTCON1),
SAVE_ITEM(S5P64X0_EINT0MASK),
};
static struct irq_grp_save {
u32 con;
u32 fltcon;
u32 mask;
} eint_grp_save[4];
static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
static int s5p64x0_irq_pm_suspend(void)
{
struct irq_grp_save *grp = eint_grp_save;
int i;
S3C_PMDBG("%s: suspending IRQs\n", __func__);
s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
grp->con = __raw_readl(S5P64X0_EINT12CON + (i * 4));
grp->mask = __raw_readl(S5P64X0_EINT12MASK + (i * 4));
grp->fltcon = __raw_readl(S5P64X0_EINT12FLTCON + (i * 4));
}
return 0;
}
static void s5p64x0_irq_pm_resume(void)
{
struct irq_grp_save *grp = eint_grp_save;
int i;
S3C_PMDBG("%s: resuming IRQs\n", __func__);
s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
__raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
__raw_writel(grp->con, S5P64X0_EINT12CON + (i * 4));
__raw_writel(grp->mask, S5P64X0_EINT12MASK + (i * 4));
__raw_writel(grp->fltcon, S5P64X0_EINT12FLTCON + (i * 4));
}
S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
}
static struct syscore_ops s5p64x0_irq_syscore_ops = {
.suspend = s5p64x0_irq_pm_suspend,
.resume = s5p64x0_irq_pm_resume,
};
static int __init s5p64x0_syscore_init(void)
{
register_syscore_ops(&s5p64x0_irq_syscore_ops);
return 0;
}
core_initcall(s5p64x0_syscore_init);