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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-06-19 02:18:14 +0300 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-06-19 02:18:14 +0300 |
commit | 0d85fd42114ce97f209f3deb91ea0ac992c56013 (patch) | |
tree | f177a06c6cff29818e93d9bd9bc1ad85781be34e /drivers/base/power/wakeup.c | |
parent | ab232ba57043ca85b55ffd7125f3f2c2d7e732ec (diff) | |
parent | db874c7e10557f8f1af9a6fb1ec6589ae06f349c (diff) | |
download | linux-0d85fd42114ce97f209f3deb91ea0ac992c56013.tar.xz |
Merge branch 'pm-wakeirq'
* pm-wakeirq:
PM / wakeirq: Fix typo in prototype for dev_pm_set_dedicated_wake_irq
PM / Wakeirq: Add automated device wake IRQ handling
Diffstat (limited to 'drivers/base/power/wakeup.c')
-rw-r--r-- | drivers/base/power/wakeup.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index 87c2603b9327..40f71603378c 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -14,6 +14,7 @@ #include <linux/suspend.h> #include <linux/seq_file.h> #include <linux/debugfs.h> +#include <linux/pm_wakeirq.h> #include <trace/events/power.h> #include "power.h" @@ -273,6 +274,97 @@ int device_wakeup_enable(struct device *dev) EXPORT_SYMBOL_GPL(device_wakeup_enable); /** + * device_wakeup_attach_irq - Attach a wakeirq to a wakeup source + * @dev: Device to handle + * @wakeirq: Device specific wakeirq entry + * + * Attach a device wakeirq to the wakeup source so the device + * wake IRQ can be configured automatically for suspend and + * resume. + */ +int device_wakeup_attach_irq(struct device *dev, + struct wake_irq *wakeirq) +{ + struct wakeup_source *ws; + int ret = 0; + + spin_lock_irq(&dev->power.lock); + ws = dev->power.wakeup; + if (!ws) { + dev_err(dev, "forgot to call call device_init_wakeup?\n"); + ret = -EINVAL; + goto unlock; + } + + if (ws->wakeirq) { + ret = -EEXIST; + goto unlock; + } + + ws->wakeirq = wakeirq; + +unlock: + spin_unlock_irq(&dev->power.lock); + + return ret; +} + +/** + * device_wakeup_detach_irq - Detach a wakeirq from a wakeup source + * @dev: Device to handle + * + * Removes a device wakeirq from the wakeup source. + */ +void device_wakeup_detach_irq(struct device *dev) +{ + struct wakeup_source *ws; + + spin_lock_irq(&dev->power.lock); + ws = dev->power.wakeup; + if (!ws) + goto unlock; + + ws->wakeirq = NULL; + +unlock: + spin_unlock_irq(&dev->power.lock); +} + +/** + * device_wakeup_arm_wake_irqs(void) + * + * Itereates over the list of device wakeirqs to arm them. + */ +void device_wakeup_arm_wake_irqs(void) +{ + struct wakeup_source *ws; + + rcu_read_lock(); + list_for_each_entry_rcu(ws, &wakeup_sources, entry) { + if (ws->wakeirq) + dev_pm_arm_wake_irq(ws->wakeirq); + } + rcu_read_unlock(); +} + +/** + * device_wakeup_disarm_wake_irqs(void) + * + * Itereates over the list of device wakeirqs to disarm them. + */ +void device_wakeup_disarm_wake_irqs(void) +{ + struct wakeup_source *ws; + + rcu_read_lock(); + list_for_each_entry_rcu(ws, &wakeup_sources, entry) { + if (ws->wakeirq) + dev_pm_disarm_wake_irq(ws->wakeirq); + } + rcu_read_unlock(); +} + +/** * device_wakeup_detach - Detach a device's wakeup source object from it. * @dev: Device to detach the wakeup source object from. * |