mirror of
https://github.com/torvalds/linux.git
synced 2024-12-21 18:42:44 +00:00
28a196fe6c
Replace GPL license statements with SPDX license identifiers (GPL-2.0 and GPL-2.0+). Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Copyright 2008 Openmoko, Inc.
|
|
// Copyright 2008 Simtec Electronics
|
|
// Ben Dooks <ben@simtec.co.uk>
|
|
// http://armlinux.simtec.co.uk/
|
|
//
|
|
// S3C64XX - Interrupt handling Power Management
|
|
|
|
/*
|
|
* NOTE: Code in this file is not used when booting with Device Tree support.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/syscore_ops.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/serial_s3c.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
|
|
#include <mach/map.h>
|
|
|
|
#include <mach/regs-gpio.h>
|
|
#include <plat/cpu.h>
|
|
#include <plat/pm.h>
|
|
|
|
/* We handled all the IRQ types in this code, to save having to make several
|
|
* small files to handle each different type separately. Having the EINT_GRP
|
|
* code here shouldn't be as much bloat as the IRQ table space needed when
|
|
* they are enabled. The added benefit is we ensure that these registers are
|
|
* in the same state as we suspended.
|
|
*/
|
|
|
|
static struct sleep_save irq_save[] = {
|
|
SAVE_ITEM(S3C64XX_PRIORITY),
|
|
SAVE_ITEM(S3C64XX_EINT0CON0),
|
|
SAVE_ITEM(S3C64XX_EINT0CON1),
|
|
SAVE_ITEM(S3C64XX_EINT0FLTCON0),
|
|
SAVE_ITEM(S3C64XX_EINT0FLTCON1),
|
|
SAVE_ITEM(S3C64XX_EINT0FLTCON2),
|
|
SAVE_ITEM(S3C64XX_EINT0FLTCON3),
|
|
SAVE_ITEM(S3C64XX_EINT0MASK),
|
|
};
|
|
|
|
static struct irq_grp_save {
|
|
u32 fltcon;
|
|
u32 con;
|
|
u32 mask;
|
|
} eint_grp_save[5];
|
|
|
|
#ifndef CONFIG_SERIAL_SAMSUNG_UARTS
|
|
#define SERIAL_SAMSUNG_UARTS 0
|
|
#else
|
|
#define SERIAL_SAMSUNG_UARTS CONFIG_SERIAL_SAMSUNG_UARTS
|
|
#endif
|
|
|
|
static u32 irq_uart_mask[SERIAL_SAMSUNG_UARTS];
|
|
|
|
static int s3c64xx_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 < 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(S3C64XX_EINT12CON + (i * 4));
|
|
grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4));
|
|
grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void s3c64xx_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 < 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, S3C64XX_EINT12CON + (i * 4));
|
|
__raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4));
|
|
__raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4));
|
|
}
|
|
|
|
S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
|
|
}
|
|
|
|
static struct syscore_ops s3c64xx_irq_syscore_ops = {
|
|
.suspend = s3c64xx_irq_pm_suspend,
|
|
.resume = s3c64xx_irq_pm_resume,
|
|
};
|
|
|
|
static __init int s3c64xx_syscore_init(void)
|
|
{
|
|
/* Appropriate drivers (pinctrl, uart) handle this when using DT. */
|
|
if (of_have_populated_dt() || !soc_is_s3c64xx())
|
|
return 0;
|
|
|
|
register_syscore_ops(&s3c64xx_irq_syscore_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
core_initcall(s3c64xx_syscore_init);
|