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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2021-10-18 15:17:27 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-11-03 19:03:55 +0100 |
| commit | b82a7df4a7f3841896aaec1ad81e654bc87b5989 (patch) | |
| tree | 048f0cc1053c1ad58b1ef73836427e4b7f7c6825 /include/linux/acpi.h | |
| parent | ed66f12ba4b17c66b4c59df76d3b1bb2cb3a75d1 (diff) | |
| download | lwn-b82a7df4a7f3841896aaec1ad81e654bc87b5989.tar.gz lwn-b82a7df4a7f3841896aaec1ad81e654bc87b5989.zip | |
ACPI: Add a convenience function to tell a device is in D0 state
Add a convenience function to tell whether a device is in D0 state,
primarily for use in drivers' probe or remove functions on busses where
the custom is to power on the device for the duration of both.
Returns false on non-ACPI systems.
Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/acpi.h')
| -rw-r--r-- | include/linux/acpi.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index fbc2146050a4..df70fc27afd7 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1016,6 +1016,7 @@ int acpi_subsys_runtime_suspend(struct device *dev); int acpi_subsys_runtime_resume(struct device *dev); int acpi_dev_pm_attach(struct device *dev, bool power_on); bool acpi_storage_d3(struct device *dev); +bool acpi_dev_state_d0(struct device *dev); #else static inline int acpi_subsys_runtime_suspend(struct device *dev) { return 0; } static inline int acpi_subsys_runtime_resume(struct device *dev) { return 0; } @@ -1027,6 +1028,10 @@ static inline bool acpi_storage_d3(struct device *dev) { return false; } +static inline bool acpi_dev_state_d0(struct device *dev) +{ + return true; +} #endif #if defined(CONFIG_ACPI) && defined(CONFIG_PM_SLEEP) |