diff options
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/suspend.c | 120 |
1 files changed, 77 insertions, 43 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 83f5b3e70d95..9a071bea80eb 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -36,12 +36,6 @@ const char *pm_states[PM_SUSPEND_MAX]; static const struct platform_suspend_ops *suspend_ops; static const struct platform_freeze_ops *freeze_ops; - -static bool need_suspend_ops(suspend_state_t state) -{ - return state > PM_SUSPEND_FREEZE; -} - static DECLARE_WAIT_QUEUE_HEAD(suspend_freeze_wait_head); static bool suspend_freeze_wake; @@ -139,6 +133,65 @@ int suspend_valid_only_mem(suspend_state_t state) } EXPORT_SYMBOL_GPL(suspend_valid_only_mem); +static bool sleep_state_supported(suspend_state_t state) +{ + return state == PM_SUSPEND_FREEZE || (suspend_ops && suspend_ops->enter); +} + +static int platform_suspend_prepare(suspend_state_t state) +{ + return state != PM_SUSPEND_FREEZE && suspend_ops->prepare ? + suspend_ops->prepare() : 0; +} + +static int platform_suspend_prepare_late(suspend_state_t state) +{ + return state != PM_SUSPEND_FREEZE && suspend_ops->prepare_late ? + suspend_ops->prepare_late() : 0; +} + +static void platform_suspend_wake(suspend_state_t state) +{ + if (state != PM_SUSPEND_FREEZE && suspend_ops->wake) + suspend_ops->wake(); +} + +static void platform_suspend_finish(suspend_state_t state) +{ + if (state != PM_SUSPEND_FREEZE && suspend_ops->finish) + suspend_ops->finish(); +} + +static int platform_suspend_begin(suspend_state_t state) +{ + if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->begin) + return freeze_ops->begin(); + else if (suspend_ops->begin) + return suspend_ops->begin(state); + else + return 0; +} + +static void platform_suspend_end(suspend_state_t state) +{ + if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->end) + freeze_ops->end(); + else if (suspend_ops->end) + suspend_ops->end(); +} + +static void platform_suspend_recover(suspend_state_t state) +{ + if (state != PM_SUSPEND_FREEZE && suspend_ops->recover) + suspend_ops->recover(); +} + +static bool platform_suspend_again(suspend_state_t state) +{ + return state != PM_SUSPEND_FREEZE && suspend_ops->suspend_again ? + suspend_ops->suspend_again() : false; +} + static int suspend_test(int level) { #ifdef CONFIG_PM_DEBUG @@ -162,7 +215,7 @@ static int suspend_prepare(suspend_state_t state) { int error; - if (need_suspend_ops(state) && (!suspend_ops || !suspend_ops->enter)) + if (!sleep_state_supported(state)) return -EPERM; pm_prepare_console(); @@ -208,23 +261,18 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) { int error; - if (need_suspend_ops(state) && suspend_ops->prepare) { - error = suspend_ops->prepare(); - if (error) - goto Platform_finish; - } + error = platform_suspend_prepare(state); + if (error) + goto Platform_finish; error = dpm_suspend_end(PMSG_SUSPEND); if (error) { printk(KERN_ERR "PM: Some devices failed to power down\n"); goto Platform_finish; } - - if (need_suspend_ops(state) && suspend_ops->prepare_late) { - error = suspend_ops->prepare_late(); - if (error) - goto Platform_wake; - } + error = platform_suspend_prepare_late(state); + if (error) + goto Platform_wake; if (suspend_test(TEST_PLATFORM)) goto Platform_wake; @@ -272,15 +320,11 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) ftrace_start(); Platform_wake: - if (need_suspend_ops(state) && suspend_ops->wake) - suspend_ops->wake(); - + platform_suspend_wake(state); dpm_resume_start(PMSG_RESUME); Platform_finish: - if (need_suspend_ops(state) && suspend_ops->finish) - suspend_ops->finish(); - + platform_suspend_finish(state); return error; } @@ -293,18 +337,13 @@ int suspend_devices_and_enter(suspend_state_t state) int error; bool wakeup = false; - if (need_suspend_ops(state) && !suspend_ops) + if (!sleep_state_supported(state)) return -ENOSYS; - if (need_suspend_ops(state) && suspend_ops->begin) { - error = suspend_ops->begin(state); - if (error) - goto Close; - } else if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->begin) { - error = freeze_ops->begin(); - if (error) - goto Close; - } + error = platform_suspend_begin(state); + if (error) + goto Close; + suspend_console(); suspend_test_start(); error = dpm_suspend_start(PMSG_SUSPEND); @@ -318,25 +357,20 @@ int suspend_devices_and_enter(suspend_state_t state) do { error = suspend_enter(state, &wakeup); - } while (!error && !wakeup && need_suspend_ops(state) - && suspend_ops->suspend_again && suspend_ops->suspend_again()); + } while (!error && !wakeup && platform_suspend_again(state)); Resume_devices: suspend_test_start(); dpm_resume_end(PMSG_RESUME); suspend_test_finish("resume devices"); resume_console(); - Close: - if (need_suspend_ops(state) && suspend_ops->end) - suspend_ops->end(); - else if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->end) - freeze_ops->end(); + Close: + platform_suspend_end(state); return error; Recover_platform: - if (need_suspend_ops(state) && suspend_ops->recover) - suspend_ops->recover(); + platform_suspend_recover(state); goto Resume_devices; } |