From 86f1e15f5646b4855bd77025c950239650c4843e Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Fri, 19 Sep 2014 20:27:35 +0200 Subject: ACPI / PM: Assign the ->detach() callback when attaching the PM domain As as preparation to simplify the detachment of devices from their PM domains, we assign the ->detach() callback to genpd_dev_pm_detach(). Signed-off-by: Ulf Hansson Reviewed-by: Dmitry Torokhov Signed-off-by: Rafael J. Wysocki --- drivers/acpi/device_pm.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/acpi') diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 67075f800e34..eec5ed5be949 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -1072,6 +1072,8 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on) acpi_dev_pm_full_power(adev); acpi_device_wakeup(adev, ACPI_STATE_S0, false); } + + dev->pm_domain->detach = acpi_dev_pm_detach; return 0; } EXPORT_SYMBOL_GPL(acpi_dev_pm_attach); -- cgit v1.2.3 From 91d66cd27f5fd8a3bca4621a3505c9067925478d Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Fri, 19 Sep 2014 20:27:44 +0200 Subject: ACPI / PM: Convert acpi_dev_pm_detach() into a static function The ->detach() callback for the PM domain has now been fully adopted, thus there no users left of the acpi_dev_pm_detach() API. This allow us to convert it into a static function. Signed-off-by: Ulf Hansson Reviewed-by: Dmitry Torokhov Signed-off-by: Rafael J. Wysocki --- drivers/acpi/device_pm.c | 69 ++++++++++++++++++++++++------------------------ include/linux/acpi.h | 2 -- 2 files changed, 34 insertions(+), 37 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index eec5ed5be949..bea6896be122 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -1040,6 +1040,40 @@ static struct dev_pm_domain acpi_general_pm_domain = { }, }; +/** + * acpi_dev_pm_detach - Remove ACPI power management from the device. + * @dev: Device to take care of. + * @power_off: Whether or not to try to remove power from the device. + * + * Remove the device from the general ACPI PM domain and remove its wakeup + * notifier. If @power_off is set, additionally remove power from the device if + * possible. + * + * Callers must ensure proper synchronization of this function with power + * management callbacks. + */ +static void acpi_dev_pm_detach(struct device *dev, bool power_off) +{ + struct acpi_device *adev = ACPI_COMPANION(dev); + + if (adev && dev->pm_domain == &acpi_general_pm_domain) { + dev->pm_domain = NULL; + acpi_remove_pm_notifier(adev); + if (power_off) { + /* + * If the device's PM QoS resume latency limit or flags + * have been exposed to user space, they have to be + * hidden at this point, so that they don't affect the + * choice of the low-power state to put the device into. + */ + dev_pm_qos_hide_latency_limit(dev); + dev_pm_qos_hide_flags(dev); + acpi_device_wakeup(adev, ACPI_STATE_S0, false); + acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0); + } + } +} + /** * acpi_dev_pm_attach - Prepare device for ACPI power management. * @dev: Device to prepare. @@ -1077,39 +1111,4 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on) return 0; } EXPORT_SYMBOL_GPL(acpi_dev_pm_attach); - -/** - * acpi_dev_pm_detach - Remove ACPI power management from the device. - * @dev: Device to take care of. - * @power_off: Whether or not to try to remove power from the device. - * - * Remove the device from the general ACPI PM domain and remove its wakeup - * notifier. If @power_off is set, additionally remove power from the device if - * possible. - * - * Callers must ensure proper synchronization of this function with power - * management callbacks. - */ -void acpi_dev_pm_detach(struct device *dev, bool power_off) -{ - struct acpi_device *adev = ACPI_COMPANION(dev); - - if (adev && dev->pm_domain == &acpi_general_pm_domain) { - dev->pm_domain = NULL; - acpi_remove_pm_notifier(adev); - if (power_off) { - /* - * If the device's PM QoS resume latency limit or flags - * have been exposed to user space, they have to be - * hidden at this point, so that they don't affect the - * choice of the low-power state to put the device into. - */ - dev_pm_qos_hide_latency_limit(dev); - dev_pm_qos_hide_flags(dev); - acpi_device_wakeup(adev, ACPI_STATE_S0, false); - acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0); - } - } -} -EXPORT_SYMBOL_GPL(acpi_dev_pm_detach); #endif /* CONFIG_PM */ diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 807cbc46d73e..b7926bb9b444 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -587,7 +587,6 @@ static inline int acpi_subsys_freeze(struct device *dev) { return 0; } #if defined(CONFIG_ACPI) && defined(CONFIG_PM) struct acpi_device *acpi_dev_pm_get_node(struct device *dev); int acpi_dev_pm_attach(struct device *dev, bool power_on); -void acpi_dev_pm_detach(struct device *dev, bool power_off); #else static inline struct acpi_device *acpi_dev_pm_get_node(struct device *dev) { @@ -597,7 +596,6 @@ static inline int acpi_dev_pm_attach(struct device *dev, bool power_on) { return -ENODEV; } -static inline void acpi_dev_pm_detach(struct device *dev, bool power_off) {} #endif #ifdef CONFIG_ACPI -- cgit v1.2.3