| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tony Lindgren | 820 | 74.82% | 4 | 10.26% |
| Chunfeng Yun | 62 | 5.66% | 1 | 2.56% |
| Rafael J. Wysocki | 45 | 4.11% | 9 | 23.08% |
| Grygorii Strashko | 38 | 3.47% | 3 | 7.69% |
| Alan Stern | 27 | 2.46% | 3 | 7.69% |
| Linus Torvalds | 21 | 1.92% | 1 | 2.56% |
| Dmitry Torokhov | 20 | 1.82% | 1 | 2.56% |
| Patrick Mochel | 17 | 1.55% | 3 | 7.69% |
| Dominik Brodowski | 12 | 1.09% | 1 | 2.56% |
| Greg Kroah-Hartman | 10 | 0.91% | 3 | 7.69% |
| John Stultz | 5 | 0.46% | 1 | 2.56% |
| Boris Brezillon | 4 | 0.36% | 1 | 2.56% |
| Arjan van de Ven | 4 | 0.36% | 2 | 5.13% |
| Tejun Heo | 3 | 0.27% | 1 | 2.56% |
| Ming Lei | 2 | 0.18% | 1 | 2.56% |
| Tian Tao | 2 | 0.18% | 1 | 2.56% |
| Tim Schmielau | 2 | 0.18% | 1 | 2.56% |
| Tom Rix | 1 | 0.09% | 1 | 2.56% |
| Sergey Shtylyov | 1 | 0.09% | 1 | 2.56% |
| Total | 1096 | 39 |
// SPDX-License-Identifier: GPL-2.0 /* Device wakeirq helper functions */ #include <linux/device.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/slab.h> #include <linux/pm_runtime.h> #include <linux/pm_wakeirq.h> #include "power.h" /** * dev_pm_attach_wake_irq - Attach device interrupt as a wake IRQ * @dev: Device entry * @wirq: Wake irq specific data * * Internal function to attach a dedicated wake-up interrupt as a wake IRQ. */ static int dev_pm_attach_wake_irq(struct device *dev, struct wake_irq *wirq) { unsigned long flags; if (!dev || !wirq) return -EINVAL; spin_lock_irqsave(&dev->power.lock, flags); if (dev_WARN_ONCE(dev, dev->power.wakeirq, "wake irq already initialized\n")) { spin_unlock_irqrestore(&dev->power.lock, flags); return -EEXIST; } dev->power.wakeirq = wirq; device_wakeup_attach_irq(dev, wirq); spin_unlock_irqrestore(&dev->power.lock, flags); return 0; } /** * dev_pm_set_wake_irq - Attach device IO interrupt as wake IRQ * @dev: Device entry * @irq: Device IO interrupt * * Attach a device IO interrupt as a wake IRQ. The wake IRQ gets * automatically configured for wake-up from suspend based * on the device specific sysfs wakeup entry. Typically called * during driver probe after calling device_init_wakeup(). */ int dev_pm_set_wake_irq(struct device *dev, int irq) { struct wake_irq *wirq; int err; if (irq < 0) return -EINVAL; wirq = kzalloc(sizeof(*wirq), GFP_KERNEL); if (!wirq) return -ENOMEM; wirq->dev = dev; wirq->irq = irq; err = dev_pm_attach_wake_irq(dev, wirq); if (err) kfree(wirq); return err; } EXPORT_SYMBOL_GPL(dev_pm_set_wake_irq); /** * dev_pm_clear_wake_irq - Detach a device IO interrupt wake IRQ * @dev: Device entry * * Detach a device wake IRQ and free resources. * * Note that it's OK for drivers to call this without calling * dev_pm_set_wake_irq() as all the driver instances may not have * a wake IRQ configured. This avoid adding wake IRQ specific * checks into the drivers. */ void dev_pm_clear_wake_irq(struct device *dev) { struct wake_irq *wirq = dev->power.wakeirq; unsigned long flags; if (!wirq) return; spin_lock_irqsave(&dev->power.lock, flags); device_wakeup_detach_irq(dev); dev->power.wakeirq = NULL; spin_unlock_irqrestore(&dev->power.lock, flags); if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED) { free_irq(wirq->irq, wirq); wirq->status &= ~WAKE_IRQ_DEDICATED_MASK; } kfree(wirq->name); kfree(wirq); } EXPORT_SYMBOL_GPL(dev_pm_clear_wake_irq); /** * handle_threaded_wake_irq - Handler for dedicated wake-up interrupts * @irq: Device specific dedicated wake-up interrupt * @_wirq: Wake IRQ data * * Some devices have a separate wake-up interrupt in addition to the * device IO interrupt. The wake-up interrupt signals that a device * should be woken up from it's idle state. This handler uses device * specific pm_runtime functions to wake the device, and then it's * up to the device to do whatever it needs to. Note that as the * device may need to restore context and start up regulators, we * use a threaded IRQ. * * Also note that we are not resending the lost device interrupts. * We assume that the wake-up interrupt just needs to wake-up the * device, and then device's pm_runtime_resume() can deal with the * situation. */ static irqreturn_t handle_threaded_wake_irq(int irq, void *_wirq) { struct wake_irq *wirq = _wirq; int res; /* Maybe abort suspend? */ if (irqd_is_wakeup_set(irq_get_irq_data(irq))) { pm_wakeup_event(wirq->dev, 0); return IRQ_HANDLED; } /* We don't want RPM_ASYNC or RPM_NOWAIT here */ res = pm_runtime_resume(wirq->dev); if (res < 0) dev_warn(wirq->dev, "wake IRQ with no resume: %i\n", res); return IRQ_HANDLED; } static int __dev_pm_set_dedicated_wake_irq(struct device *dev, int irq, unsigned int flag) { struct wake_irq *wirq; int err; if (irq < 0) return -EINVAL; wirq = kzalloc(sizeof(*wirq), GFP_KERNEL); if (!wirq) return -ENOMEM; wirq->name = kasprintf(GFP_KERNEL, "%s:wakeup", dev_name(dev)); if (!wirq->name) { err = -ENOMEM; goto err_free; } wirq->dev = dev; wirq->irq = irq; /* Prevent deferred spurious wakeirqs with disable_irq_nosync() */ irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY); /* * Consumer device may need to power up and restore state * so we use a threaded irq. */ err = request_threaded_irq(irq, NULL, handle_threaded_wake_irq, IRQF_ONESHOT | IRQF_NO_AUTOEN, wirq->name, wirq); if (err) goto err_free_name; err = dev_pm_attach_wake_irq(dev, wirq); if (err) goto err_free_irq; wirq->status = WAKE_IRQ_DEDICATED_ALLOCATED | flag; return err; err_free_irq: free_irq(irq, wirq); err_free_name: kfree(wirq->name); err_free: kfree(wirq); return err; } /** * dev_pm_set_dedicated_wake_irq - Request a dedicated wake-up interrupt * @dev: Device entry * @irq: Device wake-up interrupt * * Unless your hardware has separate wake-up interrupts in addition * to the device IO interrupts, you don't need this. * * Sets up a threaded interrupt handler for a device that has * a dedicated wake-up interrupt in addition to the device IO * interrupt. * * The interrupt starts disabled, and needs to be managed for * the device by the bus code or the device driver using * dev_pm_enable_wake_irq*() and dev_pm_disable_wake_irq*() * functions. */ int dev_pm_set_dedicated_wake_irq(struct device *dev, int irq) { return __dev_pm_set_dedicated_wake_irq(dev, irq, 0); } EXPORT_SYMBOL_GPL(dev_pm_set_dedicated_wake_irq); /** * dev_pm_set_dedicated_wake_irq_reverse - Request a dedicated wake-up interrupt * with reverse enable ordering * @dev: Device entry * @irq: Device wake-up interrupt * * Unless your hardware has separate wake-up interrupts in addition * to the device IO interrupts, you don't need this. * * Sets up a threaded interrupt handler for a device that has a dedicated * wake-up interrupt in addition to the device IO interrupt. It sets * the status of WAKE_IRQ_DEDICATED_REVERSE to tell rpm_suspend() * to enable dedicated wake-up interrupt after running the runtime suspend * callback for @dev. * * The interrupt starts disabled, and needs to be managed for * the device by the bus code or the device driver using * dev_pm_enable_wake_irq*() and dev_pm_disable_wake_irq*() * functions. */ int dev_pm_set_dedicated_wake_irq_reverse(struct device *dev, int irq) { return __dev_pm_set_dedicated_wake_irq(dev, irq, WAKE_IRQ_DEDICATED_REVERSE); } EXPORT_SYMBOL_GPL(dev_pm_set_dedicated_wake_irq_reverse); /** * dev_pm_enable_wake_irq - Enable device wake-up interrupt * @dev: Device * * Optionally called from the bus code or the device driver for * runtime_resume() to override the PM runtime core managed wake-up * interrupt handling to enable the wake-up interrupt. * * Note that for runtime_suspend()) the wake-up interrupts * should be unconditionally enabled unlike for suspend() * that is conditional. */ void dev_pm_enable_wake_irq(struct device *dev) { struct wake_irq *wirq = dev->power.wakeirq; if (wirq && (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)) enable_irq(wirq->irq); } EXPORT_SYMBOL_GPL(dev_pm_enable_wake_irq); /** * dev_pm_disable_wake_irq - Disable device wake-up interrupt * @dev: Device * * Optionally called from the bus code or the device driver for * runtime_suspend() to override the PM runtime core managed wake-up * interrupt handling to disable the wake-up interrupt. */ void dev_pm_disable_wake_irq(struct device *dev) { struct wake_irq *wirq = dev->power.wakeirq; if (wirq && (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)) disable_irq_nosync(wirq->irq); } EXPORT_SYMBOL_GPL(dev_pm_disable_wake_irq); /** * dev_pm_enable_wake_irq_check - Checks and enables wake-up interrupt * @dev: Device * @can_change_status: Can change wake-up interrupt status * * Enables wakeirq conditionally. We need to enable wake-up interrupt * lazily on the first rpm_suspend(). This is needed as the consumer device * starts in RPM_SUSPENDED state, and the first pm_runtime_get() would * otherwise try to disable already disabled wakeirq. The wake-up interrupt * starts disabled with IRQ_NOAUTOEN set. * * Should be only called from rpm_suspend() and rpm_resume() path. * Caller must hold &dev->power.lock to change wirq->status */ void dev_pm_enable_wake_irq_check(struct device *dev, bool can_change_status) { struct wake_irq *wirq = dev->power.wakeirq; if (!wirq || !(wirq->status & WAKE_IRQ_DEDICATED_MASK)) return; if (likely(wirq->status & WAKE_IRQ_DEDICATED_MANAGED)) { goto enable; } else if (can_change_status) { wirq->status |= WAKE_IRQ_DEDICATED_MANAGED; goto enable; } return; enable: if (!can_change_status || !(wirq->status & WAKE_IRQ_DEDICATED_REVERSE)) enable_irq(wirq->irq); } /** * dev_pm_disable_wake_irq_check - Checks and disables wake-up interrupt * @dev: Device * @cond_disable: if set, also check WAKE_IRQ_DEDICATED_REVERSE * * Disables wake-up interrupt conditionally based on status. * Should be only called from rpm_suspend() and rpm_resume() path. */ void dev_pm_disable_wake_irq_check(struct device *dev, bool cond_disable) { struct wake_irq *wirq = dev->power.wakeirq; if (!wirq || !(wirq->status & WAKE_IRQ_DEDICATED_MASK)) return; if (cond_disable && (wirq->status & WAKE_IRQ_DEDICATED_REVERSE)) return; if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED) disable_irq_nosync(wirq->irq); } /** * dev_pm_enable_wake_irq_complete - enable wake IRQ not enabled before * @dev: Device using the wake IRQ * * Enable wake IRQ conditionally based on status, mainly used if want to * enable wake IRQ after running ->runtime_suspend() which depends on * WAKE_IRQ_DEDICATED_REVERSE. * * Should be only called from rpm_suspend() path. */ void dev_pm_enable_wake_irq_complete(struct device *dev) { struct wake_irq *wirq = dev->power.wakeirq; if (!wirq || !(wirq->status & WAKE_IRQ_DEDICATED_MASK)) return; if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED && wirq->status & WAKE_IRQ_DEDICATED_REVERSE) enable_irq(wirq->irq); } /** * dev_pm_arm_wake_irq - Arm device wake-up * @wirq: Device wake-up interrupt * * Sets up the wake-up event conditionally based on the * device_may_wake(). */ void dev_pm_arm_wake_irq(struct wake_irq *wirq) { if (!wirq) return; if (device_may_wakeup(wirq->dev)) { if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED && !pm_runtime_status_suspended(wirq->dev)) enable_irq(wirq->irq); enable_irq_wake(wirq->irq); } } /** * dev_pm_disarm_wake_irq - Disarm device wake-up * @wirq: Device wake-up interrupt * * Clears up the wake-up event conditionally based on the * device_may_wake(). */ void dev_pm_disarm_wake_irq(struct wake_irq *wirq) { if (!wirq) return; if (device_may_wakeup(wirq->dev)) { disable_irq_wake(wirq->irq); if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED && !pm_runtime_status_suspended(wirq->dev)) disable_irq_nosync(wirq->irq); } }