diff options
Diffstat (limited to 'arch/arm/mach-tegra/cpuidle-tegra30.c')
| -rw-r--r-- | arch/arm/mach-tegra/cpuidle-tegra30.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/arch/arm/mach-tegra/cpuidle-tegra30.c b/arch/arm/mach-tegra/cpuidle-tegra30.c deleted file mode 100644 index ed2a2a7bae4d..000000000000 --- a/arch/arm/mach-tegra/cpuidle-tegra30.c +++ /dev/null @@ -1,149 +0,0 @@ -/* - * CPU idle driver for Tegra CPUs - * - * Copyright (c) 2010-2012, NVIDIA Corporation. - * Copyright (c) 2011 Google, Inc. - * Author: Colin Cross <ccross@android.com> - * Gary King <gking@nvidia.com> - * - * Rework for 3.3 by Peter De Schrijver <pdeschrijver@nvidia.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/cpuidle.h> -#include <linux/cpu_pm.h> -#include <linux/clockchips.h> -#include <linux/clk/tegra.h> - -#include <asm/cpuidle.h> -#include <asm/proc-fns.h> -#include <asm/suspend.h> -#include <asm/smp_plat.h> - -#include "pm.h" -#include "sleep.h" - -#ifdef CONFIG_PM_SLEEP -static int tegra30_idle_lp2(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index); -#endif - -static struct cpuidle_driver tegra_idle_driver = { - .name = "tegra_idle", - .owner = THIS_MODULE, -#ifdef CONFIG_PM_SLEEP - .state_count = 2, -#else - .state_count = 1, -#endif - .states = { - [0] = ARM_CPUIDLE_WFI_STATE_PWR(600), -#ifdef CONFIG_PM_SLEEP - [1] = { - .enter = tegra30_idle_lp2, - .exit_latency = 2000, - .target_residency = 2200, - .power_usage = 0, - .flags = CPUIDLE_FLAG_TIME_VALID, - .name = "powered-down", - .desc = "CPU power gated", - }, -#endif - }, -}; - -#ifdef CONFIG_PM_SLEEP -static bool tegra30_cpu_cluster_power_down(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - /* All CPUs entering LP2 is not working. - * Don't let CPU0 enter LP2 when any secondary CPU is online. - */ - if (num_online_cpus() > 1 || !tegra_cpu_rail_off_ready()) { - cpu_do_idle(); - return false; - } - - clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu); - - tegra_idle_lp2_last(); - - clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); - - return true; -} - -#ifdef CONFIG_SMP -static bool tegra30_cpu_core_power_down(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu); - - smp_wmb(); - - cpu_suspend(0, tegra30_sleep_cpu_secondary_finish); - - clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); - - return true; -} -#else -static inline bool tegra30_cpu_core_power_down(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - return true; -} -#endif - -static int tegra30_idle_lp2(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - bool entered_lp2 = false; - bool last_cpu; - - local_fiq_disable(); - - last_cpu = tegra_set_cpu_in_lp2(); - cpu_pm_enter(); - - if (dev->cpu == 0) { - if (last_cpu) - entered_lp2 = tegra30_cpu_cluster_power_down(dev, drv, - index); - else - cpu_do_idle(); - } else { - entered_lp2 = tegra30_cpu_core_power_down(dev, drv, index); - } - - cpu_pm_exit(); - tegra_clear_cpu_in_lp2(); - - local_fiq_enable(); - - smp_rmb(); - - return (entered_lp2) ? index : 0; -} -#endif - -int __init tegra30_cpuidle_init(void) -{ - return cpuidle_register(&tegra_idle_driver, NULL); -} |
