From 072de836f53be56a70cecf70b43ae43b7ce17376 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 10:08:36 +0000
Subject: [PATCH] mk-rootfs.sh
---
kernel/drivers/acpi/wakeup.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++---------
1 files changed, 92 insertions(+), 19 deletions(-)
diff --git a/kernel/drivers/acpi/wakeup.c b/kernel/drivers/acpi/wakeup.c
index 9614126..b02bf77 100644
--- a/kernel/drivers/acpi/wakeup.c
+++ b/kernel/drivers/acpi/wakeup.c
@@ -12,13 +12,20 @@
#include "internal.h"
#include "sleep.h"
+struct acpi_wakeup_handler {
+ struct list_head list_node;
+ bool (*wakeup)(void *context);
+ void *context;
+};
+
+static LIST_HEAD(acpi_wakeup_handler_head);
+static DEFINE_MUTEX(acpi_wakeup_handler_mutex);
+
/*
* 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.
@@ -30,16 +37,14 @@
*/
void acpi_enable_wakeup_devices(u8 sleep_state)
{
- struct list_head *node, *next;
+ struct acpi_device *dev, *tmp;
- list_for_each_safe(node, next, &acpi_wakeup_device_list) {
- struct acpi_device *dev =
- container_of(node, struct acpi_device, wakeup_list);
-
+ list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
+ wakeup_list) {
if (!dev->wakeup.flags.valid
|| sleep_state > (u32) dev->wakeup.sleep_state
|| !(device_may_wakeup(&dev->dev)
- || dev->wakeup.prepare_count))
+ || dev->wakeup.prepare_count))
continue;
if (device_may_wakeup(&dev->dev))
@@ -57,16 +62,14 @@
*/
void acpi_disable_wakeup_devices(u8 sleep_state)
{
- struct list_head *node, *next;
+ struct acpi_device *dev, *tmp;
- list_for_each_safe(node, next, &acpi_wakeup_device_list) {
- struct acpi_device *dev =
- container_of(node, struct acpi_device, wakeup_list);
-
+ list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
+ wakeup_list) {
if (!dev->wakeup.flags.valid
|| sleep_state > (u32) dev->wakeup.sleep_state
|| !(device_may_wakeup(&dev->dev)
- || dev->wakeup.prepare_count))
+ || dev->wakeup.prepare_count))
continue;
acpi_set_gpe_wake_mask(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
@@ -79,13 +82,11 @@
int __init acpi_wakeup_device_init(void)
{
- struct list_head *node, *next;
+ struct acpi_device *dev, *tmp;
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);
+ list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
+ wakeup_list) {
if (device_can_wakeup(&dev->dev)) {
/* Button GPEs are supposed to be always enabled. */
acpi_enable_gpe(dev->wakeup.gpe_device,
@@ -96,3 +97,75 @@
mutex_unlock(&acpi_device_lock);
return 0;
}
+
+/**
+ * acpi_register_wakeup_handler - Register wakeup handler
+ * @wake_irq: The IRQ through which the device may receive wakeups
+ * @wakeup: Wakeup-handler to call when the SCI has triggered a wakeup
+ * @context: Context to pass to the handler when calling it
+ *
+ * Drivers which may share an IRQ with the SCI can use this to register
+ * a handler which returns true when the device they are managing wants
+ * to trigger a wakeup.
+ */
+int acpi_register_wakeup_handler(int wake_irq, bool (*wakeup)(void *context),
+ void *context)
+{
+ struct acpi_wakeup_handler *handler;
+
+ /*
+ * If the device is not sharing its IRQ with the SCI, there is no
+ * need to register the handler.
+ */
+ if (!acpi_sci_irq_valid() || wake_irq != acpi_sci_irq)
+ return 0;
+
+ handler = kmalloc(sizeof(*handler), GFP_KERNEL);
+ if (!handler)
+ return -ENOMEM;
+
+ handler->wakeup = wakeup;
+ handler->context = context;
+
+ mutex_lock(&acpi_wakeup_handler_mutex);
+ list_add(&handler->list_node, &acpi_wakeup_handler_head);
+ mutex_unlock(&acpi_wakeup_handler_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_register_wakeup_handler);
+
+/**
+ * acpi_unregister_wakeup_handler - Unregister wakeup handler
+ * @wakeup: Wakeup-handler passed to acpi_register_wakeup_handler()
+ * @context: Context passed to acpi_register_wakeup_handler()
+ */
+void acpi_unregister_wakeup_handler(bool (*wakeup)(void *context),
+ void *context)
+{
+ struct acpi_wakeup_handler *handler;
+
+ mutex_lock(&acpi_wakeup_handler_mutex);
+ list_for_each_entry(handler, &acpi_wakeup_handler_head, list_node) {
+ if (handler->wakeup == wakeup && handler->context == context) {
+ list_del(&handler->list_node);
+ kfree(handler);
+ break;
+ }
+ }
+ mutex_unlock(&acpi_wakeup_handler_mutex);
+}
+EXPORT_SYMBOL_GPL(acpi_unregister_wakeup_handler);
+
+bool acpi_check_wakeup_handlers(void)
+{
+ struct acpi_wakeup_handler *handler;
+
+ /* No need to lock, nothing else is running when we're called. */
+ list_for_each_entry(handler, &acpi_wakeup_handler_head, list_node) {
+ if (handler->wakeup(handler->context))
+ return true;
+ }
+
+ return false;
+}
--
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