99 строки
2.7 KiB
C
99 строки
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* wakeup.c - support wakeup devices
|
|
* Copyright (C) 2004 Li Shaohua <shaohua.li@intel.com>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
|
|
#include "internal.h"
|
|
#include "sleep.h"
|
|
|
|
/*
|
|
* We didn't lock acpi_device_lock in the file, because it invokes oops in
|
|
* suspend/resume and isn't really required as this is called in S-state. At
|
|
* that time, there is no device hotplug
|
|
**/
|
|
#define _COMPONENT ACPI_SYSTEM_COMPONENT
|
|
ACPI_MODULE_NAME("wakeup_devices")
|
|
|
|
/**
|
|
* acpi_enable_wakeup_devices - Enable wake-up device GPEs.
|
|
* @sleep_state: ACPI system sleep state.
|
|
*
|
|
* Enable wakeup device power of devices with the state.enable flag set and set
|
|
* the wakeup enable mask bits in the GPE registers that correspond to wakeup
|
|
* devices.
|
|
*/
|
|
void acpi_enable_wakeup_devices(u8 sleep_state)
|
|
{
|
|
struct list_head *node, *next;
|
|
|
|
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
|
|
struct acpi_device *dev =
|
|
container_of(node, struct acpi_device, wakeup_list);
|
|
|
|
if (!dev->wakeup.flags.valid
|
|
|| sleep_state > (u32) dev->wakeup.sleep_state
|
|
|| !(device_may_wakeup(&dev->dev)
|
|
|| dev->wakeup.prepare_count))
|
|
continue;
|
|
|
|
if (device_may_wakeup(&dev->dev))
|
|
acpi_enable_wakeup_device_power(dev, sleep_state);
|
|
|
|
/* The wake-up power should have been enabled already. */
|
|
acpi_set_gpe_wake_mask(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
|
|
ACPI_GPE_ENABLE);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* acpi_disable_wakeup_devices - Disable devices' wakeup capability.
|
|
* @sleep_state: ACPI system sleep state.
|
|
*/
|
|
void acpi_disable_wakeup_devices(u8 sleep_state)
|
|
{
|
|
struct list_head *node, *next;
|
|
|
|
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
|
|
struct acpi_device *dev =
|
|
container_of(node, struct acpi_device, wakeup_list);
|
|
|
|
if (!dev->wakeup.flags.valid
|
|
|| sleep_state > (u32) dev->wakeup.sleep_state
|
|
|| !(device_may_wakeup(&dev->dev)
|
|
|| dev->wakeup.prepare_count))
|
|
continue;
|
|
|
|
acpi_set_gpe_wake_mask(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
|
|
ACPI_GPE_DISABLE);
|
|
|
|
if (device_may_wakeup(&dev->dev))
|
|
acpi_disable_wakeup_device_power(dev);
|
|
}
|
|
}
|
|
|
|
int __init acpi_wakeup_device_init(void)
|
|
{
|
|
struct list_head *node, *next;
|
|
|
|
mutex_lock(&acpi_device_lock);
|
|
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
|
|
struct acpi_device *dev = container_of(node,
|
|
struct acpi_device,
|
|
wakeup_list);
|
|
if (device_can_wakeup(&dev->dev)) {
|
|
/* Button GPEs are supposed to be always enabled. */
|
|
acpi_enable_gpe(dev->wakeup.gpe_device,
|
|
dev->wakeup.gpe_number);
|
|
device_set_wakeup_enable(&dev->dev, true);
|
|
}
|
|
}
|
|
mutex_unlock(&acpi_device_lock);
|
|
return 0;
|
|
}
|