kernel/drivers/base/power/power.h, branch linux-rolling-stable

PM: sleep: wakeirq: fix wake irq arming

2023-08-03T08:26:13Z

commit 8527beb12087238d4387607597b4020bc393c4b4 upstream. The decision whether to enable a wake irq during suspend can not be done based on the runtime PM state directly as a driver may use wake irqs without implementing runtime PM. Such drivers specifically leave the state set to the default 'suspended' and the wake irq is thus never enabled at suspend. Add a new wake irq flag to track whether a dedicated wake irq has been enabled at runtime suspend and therefore must not be enabled at system suspend. Note that pm_runtime_enabled() can not be used as runtime PM is always disabled during late suspend. Fixes: 69728051f5bf ("PM / wakeirq: Fix unbalanced IRQ enable for wakeirq") Cc: 4.16+ # 4.16+ Signed-off-by: Johan Hovold Reviewed-by: Tony Lindgren Tested-by: Tony Lindgren Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

PM / wakeirq: support enabling wake-up irq after runtime_suspend called

2021-10-27T18:49:32Z

When the dedicated wake IRQ is level trigger, and it uses the device's low-power status as the wakeup source, that means if the device is not in low-power state, the wake IRQ will be triggered if enabled; For this case, need enable the wake IRQ after running the device's ->runtime_suspend() which make it enter low-power state. e.g. Assume the wake IRQ is a low level trigger type, and the wakeup signal comes from the low-power status of the device. The wakeup signal is low level at running time (0), and becomes high level when the device enters low-power state (runtime_suspend (1) is called), a wakeup event at (2) make the device exit low-power state, then the wakeup signal also becomes low level. ------------------ | ^ ^| ---------------- | | -------------- |<---(0)--->|<--(1)--| (3) (2) (4) if enable the wake IRQ before running runtime_suspend during (0), a wake IRQ will arise, it causes resume immediately; it works if enable wake IRQ ( e.g. at (3) or (4)) after running ->runtime_suspend(). This patch introduces a new status WAKE_IRQ_DEDICATED_REVERSE to optionally support enabling wake IRQ after running ->runtime_suspend(). Suggested-by: Rafael J. Wysocki Signed-off-by: Chunfeng Yun Signed-off-by: Rafael J. Wysocki

drivers/base/power: add dpm_sysfs_change_owner()

2020-02-27T04:07:25Z

Add a helper to change the owner of a device's power entries. This needs to happen when the ownership of a device is changed, e.g. when moving network devices between network namespaces. This function will be used to correctly account for ownership changes, e.g. when moving network devices between network namespaces. Reviewed-by: Greg Kroah-Hartman Reviewed-by: "Rafael J. Wysocki" Signed-off-by: Christian Brauner Signed-off-by: David S. Miller

PM / core: Clean up some function headers in power.h

2019-11-08T11:38:42Z

The power.h is a bit messy due to the various existing CONFIG_PM* Kconfig combinations. However the final section for wakeup_source_sysfs*() can be moved inside one of the existing sections rather than adding yet another one, so let's do that to clean up the code a little bit. Signed-off-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki

PM / wakeup: Register wakeup class kobj after device is added

2019-08-20T22:25:16Z

The device_set_wakeup_enable() function can be called on a device that hasn't been registered with device_add() yet. This allows the device to be in a state where wakeup is enabled for it but the device isn't published to userspace in sysfs yet. After commit c8377adfa781 ("PM / wakeup: Show wakeup sources stats in sysfs"), calling device_set_wakeup_enable() will fail for a device that hasn't been registered with the driver core via device_add(). This is because we try to create sysfs entries for the device and associate a wakeup class kobject with it before the device has been registered. Let's follow a similar approach that device_set_wakeup_capable() takes here and register the wakeup class either from device_set_wakeup_enable() when the device is already registered, or from dpm_sysfs_add() when the device is being registered with the driver core via device_add(). Fixes: c8377adfa781 ("PM / wakeup: Show wakeup sources stats in sysfs") Reported-by: Qian Cai Reviewed-by: Tri Vo Signed-off-by: Stephen Boyd Signed-off-by: Rafael J. Wysocki

PM / wakeup: Show wakeup sources stats in sysfs

2019-08-20T22:20:40Z

Add an ID and a device pointer to 'struct wakeup_source'. Use them to to expose wakeup sources statistics in sysfs under /sys/class/wakeup/wakeup/*. Co-developed-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman Co-developed-by: Stephen Boyd Signed-off-by: Stephen Boyd Signed-off-by: Tri Vo Tested-by: Kalesh Singh Signed-off-by: Rafael J. Wysocki

PM-runtime: Consolidate code to get active/suspended time

2019-03-07T10:23:17Z

In a step to consolidate the code for fetching the PM-runtime active/suspended time for a device, add a common function for that and make the existing pm_runtime_suspended_time() call it. Also add a corresponding pm_runtime_active_time() calling the new common function. Signed-off-by: Ulf Hansson [ rjw: Changelog, function rename ] Signed-off-by: Rafael J. Wysocki

PM / core: Drop unused internal inline functions for sysfs

2018-05-10T09:55:12Z

The inline versions of rpm_sysfs_remove() and wakeup_sysfs_add|remove(), are not being used while CONFIG_PM is unset, hence let's drop them. Signed-off-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki

PM / core: Drop unused internal functions for pm_qos sysfs

2018-05-10T09:55:12Z

The functions pm_qos_sysfs_add|remove() are available as inline functions only while CONFIG_PM is unset, but are not being used. Likely they are a leftover from an earlier cleanup in the past, anyway let's drop them. Signed-off-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki

PM / core: Drop unused internal inline functions for wakeirqs

2018-05-10T09:55:12Z

The inline versions of dev_pm_arm|disarm_wake_irq() and dev_pm_enable|disable_wake_irq_check() are not being used while CONFIG_PM is unset, hence let's drop them. Signed-off-by: Ulf Hansson Acked-by: Tony Lindgren Signed-off-by: Rafael J. Wysocki