/** * suspend_enter - Make the system enter the given sleep state. * @state: System sleep state to enter. * @wakeup: Returns information that the sleep state should not be re-entered. * * This function should be called after devices have been suspended. */ static int suspend_enter(suspend_state_t state, bool *wakeup) { int error; #ifdef CONFIG_SEC_GPIO_DVS /************************ Caution !!! ****************************/ /* This function must be located in appropriate SLEEP position * in accordance with the specification of each BB vendor. */ /************************ Caution !!! ****************************/ gpio_dvs_check_sleepgpio(); #ifdef SECGPIO_SLEEP_DEBUGGING /************************ Caution !!! ****************************/ /* This func. must be located in an appropriate position for GPIO SLEEP debugging * in accordance with the specification of each BB vendor, and * the func. must be called after calling the function "gpio_dvs_check_sleepgpio" */ /************************ Caution !!! ****************************/ gpio_dvs_set_sleepgpio(); #endif #endif if (suspend_ops->prepare) { error = suspend_ops->prepare(); 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 (suspend_ops->prepare_late) { error = suspend_ops->prepare_late(); if (error) goto Platform_wake; } if (suspend_test(TEST_PLATFORM)) goto Platform_wake; error = disable_nonboot_cpus(); if (error || suspend_test(TEST_CPUS)) goto Enable_cpus; arch_suspend_disable_irqs(); BUG_ON(!irqs_disabled()); error = syscore_suspend(); if (!error) { *wakeup = pm_wakeup_pending(); if (!(suspend_test(TEST_CORE) || *wakeup)) { error = suspend_ops->enter(state); events_check_enabled = false; } syscore_resume(); } arch_suspend_enable_irqs(); BUG_ON(irqs_disabled()); Enable_cpus: enable_nonboot_cpus(); Platform_wake: if (suspend_ops->wake) suspend_ops->wake(); dpm_resume_start(PMSG_RESUME); Platform_finish: if (suspend_ops->finish) suspend_ops->finish(); return error; }
/** * suspend_enter - Make the system enter the given sleep state. * @state: System sleep state to enter. * @wakeup: Returns information that the sleep state should not be re-entered. * * This function should be called after devices have been suspended. */ static int suspend_enter(suspend_state_t state, bool *wakeup) { int error; #ifdef CONFIG_SEC_GPIO_DVS /************************ Caution !!! ****************************/ /* This function must be located in appropriate SLEEP position * in accordance with the specification of each BB vendor. */ /************************ Caution !!! ****************************/ gpio_dvs_check_sleepgpio(); #ifdef SECGPIO_SLEEP_DEBUGGING /************************ Caution !!! ****************************/ /* This func. must be located in an appropriate position for GPIO SLEEP debugging * in accordance with the specification of each BB vendor, and * the func. must be called after calling the function "gpio_dvs_check_sleepgpio" */ /************************ Caution !!! ****************************/ gpio_dvs_set_sleepgpio(); #endif #endif if (need_suspend_ops(state) && suspend_ops->prepare) { error = suspend_ops->prepare(); 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; } if (suspend_test(TEST_PLATFORM)) goto Platform_wake; /* * PM_SUSPEND_FREEZE equals * frozen processes + suspended devices + idle processors. * Thus we should invoke freeze_enter() soon after * all the devices are suspended. */ if (state == PM_SUSPEND_FREEZE) { freeze_enter(); goto Platform_wake; } error = disable_nonboot_cpus(); if (error || suspend_test(TEST_CPUS)) goto Enable_cpus; arch_suspend_disable_irqs(); BUG_ON(!irqs_disabled()); error = syscore_suspend(); if (!error) { *wakeup = pm_wakeup_pending(); if (!(suspend_test(TEST_CORE) || *wakeup)) { error = suspend_ops->enter(state); events_check_enabled = false; } syscore_resume(); } #if defined(CONFIG_SEC_GPIO_DVS) && defined(SECGPIO_SLEEP_DEBUGGING) /************************ Caution !!! ****************************/ /* This function must be located in an appropriate position * to undo gpio SLEEP debugging setting when DUT wakes up. * It should be implemented in accordance with the specification of each BB vendor. */ /************************ Caution !!! ****************************/ gpio_dvs_undo_sleepgpio(); #endif arch_suspend_enable_irqs(); BUG_ON(irqs_disabled()); Enable_cpus: enable_nonboot_cpus(); Platform_wake: if (need_suspend_ops(state) && suspend_ops->wake) suspend_ops->wake(); dpm_resume_start(PMSG_RESUME); Platform_finish: if (need_suspend_ops(state) && suspend_ops->finish) suspend_ops->finish(); return error; }