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259714100d
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 <rafael.j.wysocki@intel.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
170 lines
4.9 KiB
C
170 lines
4.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/pm_qos.h>
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static inline void device_pm_init_common(struct device *dev)
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{
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if (!dev->power.early_init) {
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spin_lock_init(&dev->power.lock);
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dev->power.qos = NULL;
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dev->power.early_init = true;
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}
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}
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#ifdef CONFIG_PM
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static inline void pm_runtime_early_init(struct device *dev)
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{
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dev->power.disable_depth = 1;
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device_pm_init_common(dev);
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}
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extern void pm_runtime_init(struct device *dev);
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extern void pm_runtime_reinit(struct device *dev);
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extern void pm_runtime_remove(struct device *dev);
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extern u64 pm_runtime_active_time(struct device *dev);
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#define WAKE_IRQ_DEDICATED_ALLOCATED BIT(0)
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#define WAKE_IRQ_DEDICATED_MANAGED BIT(1)
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#define WAKE_IRQ_DEDICATED_REVERSE BIT(2)
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#define WAKE_IRQ_DEDICATED_MASK (WAKE_IRQ_DEDICATED_ALLOCATED | \
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WAKE_IRQ_DEDICATED_MANAGED | \
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WAKE_IRQ_DEDICATED_REVERSE)
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struct wake_irq {
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struct device *dev;
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unsigned int status;
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int irq;
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const char *name;
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};
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extern void dev_pm_arm_wake_irq(struct wake_irq *wirq);
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extern void dev_pm_disarm_wake_irq(struct wake_irq *wirq);
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extern void dev_pm_enable_wake_irq_check(struct device *dev,
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bool can_change_status);
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extern void dev_pm_disable_wake_irq_check(struct device *dev, bool cond_disable);
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extern void dev_pm_enable_wake_irq_complete(struct device *dev);
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#ifdef CONFIG_PM_SLEEP
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extern void device_wakeup_attach_irq(struct device *dev, struct wake_irq *wakeirq);
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extern void device_wakeup_detach_irq(struct device *dev);
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extern void device_wakeup_arm_wake_irqs(void);
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extern void device_wakeup_disarm_wake_irqs(void);
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#else
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static inline void device_wakeup_attach_irq(struct device *dev,
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struct wake_irq *wakeirq) {}
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static inline void device_wakeup_detach_irq(struct device *dev)
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{
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}
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#endif /* CONFIG_PM_SLEEP */
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/*
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* sysfs.c
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*/
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extern int dpm_sysfs_add(struct device *dev);
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extern void dpm_sysfs_remove(struct device *dev);
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extern void rpm_sysfs_remove(struct device *dev);
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extern int wakeup_sysfs_add(struct device *dev);
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extern void wakeup_sysfs_remove(struct device *dev);
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extern int pm_qos_sysfs_add_resume_latency(struct device *dev);
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extern void pm_qos_sysfs_remove_resume_latency(struct device *dev);
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extern int pm_qos_sysfs_add_flags(struct device *dev);
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extern void pm_qos_sysfs_remove_flags(struct device *dev);
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extern int pm_qos_sysfs_add_latency_tolerance(struct device *dev);
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extern void pm_qos_sysfs_remove_latency_tolerance(struct device *dev);
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extern int dpm_sysfs_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid);
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#else /* CONFIG_PM */
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static inline void pm_runtime_early_init(struct device *dev)
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{
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device_pm_init_common(dev);
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}
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static inline void pm_runtime_init(struct device *dev) {}
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static inline void pm_runtime_reinit(struct device *dev) {}
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static inline void pm_runtime_remove(struct device *dev) {}
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static inline int dpm_sysfs_add(struct device *dev) { return 0; }
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static inline void dpm_sysfs_remove(struct device *dev) {}
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static inline int dpm_sysfs_change_owner(struct device *dev, kuid_t kuid,
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kgid_t kgid) { return 0; }
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#endif
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#ifdef CONFIG_PM_SLEEP
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/* kernel/power/main.c */
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extern int pm_async_enabled;
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/* drivers/base/power/main.c */
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extern struct list_head dpm_list; /* The active device list */
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static inline struct device *to_device(struct list_head *entry)
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{
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return container_of(entry, struct device, power.entry);
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}
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extern void device_pm_sleep_init(struct device *dev);
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extern void device_pm_add(struct device *);
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extern void device_pm_remove(struct device *);
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extern void device_pm_move_before(struct device *, struct device *);
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extern void device_pm_move_after(struct device *, struct device *);
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extern void device_pm_move_last(struct device *);
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extern void device_pm_check_callbacks(struct device *dev);
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static inline bool device_pm_initialized(struct device *dev)
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{
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return dev->power.in_dpm_list;
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}
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/* drivers/base/power/wakeup_stats.c */
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extern int wakeup_source_sysfs_add(struct device *parent,
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struct wakeup_source *ws);
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extern void wakeup_source_sysfs_remove(struct wakeup_source *ws);
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extern int pm_wakeup_source_sysfs_add(struct device *parent);
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#else /* !CONFIG_PM_SLEEP */
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static inline void device_pm_sleep_init(struct device *dev) {}
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static inline void device_pm_add(struct device *dev) {}
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static inline void device_pm_remove(struct device *dev)
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{
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pm_runtime_remove(dev);
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}
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static inline void device_pm_move_before(struct device *deva,
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struct device *devb) {}
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static inline void device_pm_move_after(struct device *deva,
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struct device *devb) {}
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static inline void device_pm_move_last(struct device *dev) {}
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static inline void device_pm_check_callbacks(struct device *dev) {}
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static inline bool device_pm_initialized(struct device *dev)
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{
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return device_is_registered(dev);
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}
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static inline int pm_wakeup_source_sysfs_add(struct device *parent)
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{
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return 0;
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}
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#endif /* !CONFIG_PM_SLEEP */
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static inline void device_pm_init(struct device *dev)
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{
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device_pm_init_common(dev);
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device_pm_sleep_init(dev);
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pm_runtime_init(dev);
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}
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