From: Rafael J. Wysocki <rjw@xxxxxxx>
PCI run-time power management generally requires us to set up wake-up
power for devices that are supposed to generate wake-up events, but
at the moment we only have acpi_pm_device_sleep_wake() allowing us
only to do that during system-wide power transitions. For this
reason introduce another helper function, acpi_pm_wakeup_power(),
allowing us to enable/disable wake-up power for a device at any time
and rework acpi_pm_device_sleep_wake() to use it too.
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
---
drivers/acpi/sleep.c | 22 ++++++++++++++++------
include/acpi/acpi_bus.h | 11 ++++++++---
2 files changed, 24 insertions(+), 9 deletions(-)
Index: linux-2.6/kernel/power/Kconfig
===================================================================
--- linux-2.6.orig/kernel/power/Kconfig
+++ linux-2.6/kernel/power/Kconfig
@@ -236,3 +236,8 @@ config PM_RUNTIME
and the bus type drivers of the buses the devices are on are
responsible for the actual handling of the autosuspend requests and
wake-up events.
+
+config PM_WAKEUP
+ bool
+ depends on SUSPEND || HIBERNATION || PM_RUNTIME
+ default y
Index: linux-2.6/drivers/acpi/sleep.c
===================================================================
--- linux-2.6.orig/drivers/acpi/sleep.c
+++ linux-2.6/drivers/acpi/sleep.c
@@ -634,7 +634,7 @@ int acpi_suspend(u32 acpi_state)
return -EINVAL;
}
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM_WAKEUP
/**
* acpi_pm_device_sleep_state - return preferred power state of ACPI device
* in the system sleep state given by %acpi_target_sleep_state
@@ -720,6 +720,18 @@ int acpi_pm_device_sleep_state(struct de
}
/**
+ * acpi_pm_wakeup_power - Enable/disable device wake-up power.
+ * @dev: ACPI device to handle.
+ * @enable: Whether to enable or disable the wake-up power of the device.
+ */
+int acpi_pm_wakeup_power(struct acpi_device *dev, bool enable)
+{
+ return enable ?
+ acpi_enable_wakeup_device_power(dev, acpi_target_sleep_state) :
+ acpi_disable_wakeup_device_power(dev);
+}
+
+/**
* acpi_pm_device_sleep_wake - enable or disable the system wake-up
* capability of given device
* @dev: device to handle
@@ -740,16 +752,14 @@ int acpi_pm_device_sleep_wake(struct dev
return -ENODEV;
}
- error = enable ?
- acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
- acpi_disable_wakeup_device_power(adev);
+ error = acpi_pm_wakeup_power(adev, enable);
if (!error)
- dev_info(dev, "wake-up capability %s by ACPI\n",
+ dev_info(dev, "wake-up power %s by ACPI\n",
enable ? "enabled" : "disabled");
return error;
}
-#endif
+#endif /* CONFIG_PM_WAKEUP */
static void acpi_power_off_prepare(void)
{
Index: linux-2.6/include/acpi/acpi_bus.h
===================================================================
--- linux-2.6.orig/include/acpi/acpi_bus.h
+++ linux-2.6/include/acpi/acpi_bus.h
@@ -388,21 +388,26 @@ acpi_handle acpi_get_pci_rootbridge_hand
struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM_WAKEUP
int acpi_pm_device_sleep_state(struct device *, int *);
+int acpi_pm_wakeup_power(struct acpi_device *, bool);
int acpi_pm_device_sleep_wake(struct device *, bool);
-#else /* !CONFIG_PM_SLEEP */
+#else /* !CONFIG_PM_WAKEUP */
static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
{
if (p)
*p = ACPI_STATE_D0;
return ACPI_STATE_D3;
}
+static inline int acpi_pm_wakeup_power(struct acpi_device *dev, bool enable)
+{
+ return -ENODEV;
+}
static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
return -ENODEV;
}
-#endif /* !CONFIG_PM_SLEEP */
+#endif /* !CONFIG_PM_WAKEUP */
#endif /* CONFIG_ACPI */
--
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