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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/acpi/wakeup.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/acpi/wakeup.c')
-rw-r--r--kernel/drivers/acpi/wakeup.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/kernel/drivers/acpi/wakeup.c b/kernel/drivers/acpi/wakeup.c
new file mode 100644
index 000000000..1638401ab
--- /dev/null
+++ b/kernel/drivers/acpi/wakeup.c
@@ -0,0 +1,97 @@
+/*
+ * 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;
+}