/* * kernel/power/autosleep.c * * Opportunistic sleep support. * * Copyright (C) 2012 Rafael J. Wysocki */ #include #include #include #include "power.h" static suspend_state_t autosleep_state; static struct workqueue_struct *autosleep_wq; /* * Note: it is only safe to mutex_lock(&autosleep_lock) if a wakeup_source * is active, otherwise a deadlock with try_to_suspend() is possible. * Alternatively mutex_lock_interruptible() can be used. This will then fail * if an auto_sleep cycle tries to freeze processes. */ static DEFINE_MUTEX(autosleep_lock); static struct wakeup_source *autosleep_ws; static void try_to_suspend(struct work_struct *work) { unsigned int initial_count, final_count; if (!pm_get_wakeup_count(&initial_count, true)) goto out; mutex_lock(&autosleep_lock); if (!pm_save_wakeup_count(initial_count) || system_state != SYSTEM_RUNNING) { mutex_unlock(&autosleep_lock); goto out; } if (autosleep_state == PM_SUSPEND_ON) { mutex_unlock(&autosleep_lock); return; } if (autosleep_state >= PM_SUSPEND_MAX) hibernate(); else pm_suspend(autosleep_state); mutex_unlock(&autosleep_lock); if (!pm_get_wakeup_count(&final_count, false)) goto out; /* * If the wakeup occured for an unknown reason, wait to prevent the * system from trying to suspend and waking up in a tight loop. */ if (final_count == initial_count) schedule_timeout_uninterruptible(HZ / 2); out: queue_up_suspend_work(); } static DECLARE_WORK(suspend_work, try_to_suspend); void queue_up_suspend_work(void) { if (autosleep_state > PM_SUSPEND_ON) queue_work(autosleep_wq, &suspend_work); } suspend_state_t pm_autosleep_state(void) { return autosleep_state; } int pm_autosleep_lock(void) { return mutex_lock_interruptible(&autosleep_lock); } void pm_autosleep_unlock(void) { mutex_unlock(&autosleep_lock); } int pm_autosleep_set_state(suspend_state_t state) { #ifndef CONFIG_HIBERNATION if (state >= PM_SUSPEND_MAX) return -EINVAL; #endif __pm_stay_awake(autosleep_ws); mutex_lock(&autosleep_lock); autosleep_state = state; __pm_relax(autosleep_ws); if (state > PM_SUSPEND_ON) { pm_wakep_autosleep_enabled(true); queue_up_suspend_work(); } else { pm_wakep_autosleep_enabled(false); } mutex_unlock(&autosleep_lock); return 0; } int __init pm_autosleep_init(void) { autosleep_ws = wakeup_source_register("autosleep"); if (!autosleep_ws) return -ENOMEM; autosleep_wq = alloc_ordered_workqueue("autosleep", 0); if (autosleep_wq) return 0; wakeup_source_unregister(autosleep_ws); return -ENOMEM; } earch' size='10' name='q' value=''/>
path: root/include/dt-bindings/gpio/tegra-gpio.h
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authorJeremy Linton <jeremy.linton@arm.com>2016-11-29 14:45:10 -0600
committerArnd Bergmann <arnd@arndb.de>2016-11-30 23:49:16 +0100
commit4c9456df8849204435c4de1849120b916975d75d (patch)
tree9dd2bb5f13f770fdda7758ca041aec993cfe11e2 /include/dt-bindings/gpio/tegra-gpio.h
parent6e631f6d354fd7d527de86b1bc7d94fabac862d6 (diff)
arm64: dts: juno: Correct PCI IO window
The PCIe root complex on Juno translates the MMIO mapped at 0x5f800000 to the PIO address range starting at 0 (which is common because PIO addresses are generally < 64k). Correct the DT to reflect this. Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/dt-bindings/gpio/tegra-gpio.h')