static int s3c_pm_enter(suspend_state_t state) { int ret; /* ensure the debug is initialised (if enabled) */ s3c_pm_debug_init(); S3C_PMDBG("%s(%d)\n", __func__, state); if (pm_cpu_prep == NULL || pm_cpu_sleep == NULL) { printk(KERN_ERR "%s: error: no cpu sleep function\n", __func__); return -EINVAL; } /* check if we have anything to wake-up with... bad things seem * to happen if you suspend with no wakeup (system will often * require a full power-cycle) */ if (!of_have_populated_dt() && !any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) && !any_allowed(s3c_irqwake_eintmask, s3c_irqwake_eintallow)) { printk(KERN_ERR "%s: No wake-up sources!\n", __func__); printk(KERN_ERR "%s: Aborting sleep\n", __func__); return -EINVAL; } /* save all necessary core registers not covered by the drivers */ if (!of_have_populated_dt()) { samsung_pm_save_gpios(); samsung_pm_saved_gpios(); } s3c_pm_save_uarts(); s3c_pm_save_core(); /* set the irq configuration for wake */ s3c_pm_configure_extint(); S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n", s3c_irqwake_intmask, s3c_irqwake_eintmask); s3c_pm_arch_prepare_irqs(); /* call cpu specific preparation */ pm_cpu_prep(); /* flush cache back to ram */ flush_cache_all(); s3c_pm_check_store(); /* send the cpu to sleep... */ s3c_pm_arch_stop_clocks(); /* this will also act as our return point from when * we resume as it saves its own register state and restores it * during the resume. */ ret = cpu_suspend(0, pm_cpu_sleep); if (ret) return ret; /* restore the system state */ s3c_pm_restore_core(); s3c_pm_restore_uarts(); if (!of_have_populated_dt()) { samsung_pm_restore_gpios(); s3c_pm_restored_gpios(); } s3c_pm_debug_init(); /* check what irq (if any) restored the system */ s3c_pm_arch_show_resume_irqs(); S3C_PMDBG("%s: post sleep, preparing to return\n", __func__); /* LEDs should now be 1110 */ s3c_pm_debug_smdkled(1 << 1, 0); s3c_pm_check_restore(); /* ok, let's return from sleep */ S3C_PMDBG("S3C PM Resume (post-restore)\n"); return 0; }
static int s3c_pm_enter(suspend_state_t state) { /* */ s3c_pm_debug_init(); S3C_PMDBG("%s(%d)\n", __func__, state); if (pm_cpu_prep == NULL || pm_cpu_sleep == NULL) { printk(KERN_ERR "%s: error: no cpu sleep function\n", __func__); return -EINVAL; } /* */ if (!any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) && !any_allowed(s3c_irqwake_eintmask, s3c_irqwake_eintallow)) { printk(KERN_ERR "%s: No wake-up sources!\n", __func__); printk(KERN_ERR "%s: Aborting sleep\n", __func__); return -EINVAL; } /* */ samsung_pm_save_gpios(); samsung_pm_saved_gpios(); s3c_pm_save_uarts(); s3c_pm_save_core(); /* */ s3c_pm_configure_extint(); S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n", s3c_irqwake_intmask, s3c_irqwake_eintmask); s3c_pm_arch_prepare_irqs(); /* */ pm_cpu_prep(); /* */ flush_cache_all(); s3c_pm_check_store(); /* */ s3c_pm_arch_stop_clocks(); /* */ cpu_suspend(0, pm_cpu_sleep); /* */ s3c_pm_restore_core(); s3c_pm_restore_uarts(); samsung_pm_restore_gpios(); s3c_pm_restored_gpios(); s3c_pm_debug_init(); /* */ s3c_pm_arch_show_resume_irqs(); S3C_PMDBG("%s: post sleep, preparing to return\n", __func__); /* */ s3c_pm_debug_smdkled(1 << 1, 0); s3c_pm_check_restore(); /* */ S3C_PMDBG("S3C PM Resume (post-restore)\n"); return 0; }