projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0b25e25b JL |
1 | /* |
| 2 | * CPU idle driver for Tegra CPUs | |
| 3 | * | |
| 4 | * Copyright (c) 2010-2012, NVIDIA Corporation. | |
| 5 | * Copyright (c) 2011 Google, Inc. | |
| 6 | * Author: Colin Cross <ccross@android.com> | |
| 7 | * Gary King <gking@nvidia.com> | |
| 8 | * | |
| 9 | * Rework for 3.3 by Peter De Schrijver <pdeschrijver@nvidia.com> | |
| 10 | * | |
| 11 | * This program is free software; you can redistribute it and/or modify | |
| 12 | * it under the terms of the GNU General Public License as published by | |
| 13 | * the Free Software Foundation; either version 2 of the License, or | |
| 14 | * (at your option) any later version. | |
| 15 | * | |
| 16 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
| 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 19 | * more details. | |
| 20 | */ | |
| 21 | ||
| 22 | #include <linux/kernel.h> | |
| 23 | #include <linux/module.h> | |
| 24 | #include <linux/cpuidle.h> | |
| 25 | ||
| 26 | #include <asm/cpuidle.h> | |
| 27 | ||
| 28 | static struct cpuidle_driver tegra_idle_driver = { | |
| 29 | .name = "tegra_idle", | |
| 30 | .owner = THIS_MODULE, | |
| 31 | .en_core_tk_irqen = 1, | |
| 32 | .state_count = 1, | |
| 33 | .states = { | |
| 34 | [0] = ARM_CPUIDLE_WFI_STATE_PWR(600), | |
| 35 | }, | |
| 36 | }; | |
| 37 | ||
| 38 | static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device); | |
| 39 | ||
| 40 | int __init tegra20_cpuidle_init(void) | |
| 41 | { | |
| 42 | int ret; | |
| 43 | unsigned int cpu; | |
| 44 | struct cpuidle_device *dev; | |
| 45 | struct cpuidle_driver *drv = &tegra_idle_driver; | |
| 46 | ||
| 47 | ret = cpuidle_register_driver(&tegra_idle_driver); | |
| 48 | if (ret) { | |
| 49 | pr_err("CPUidle driver registration failed\n"); | |
| 50 | return ret; | |
| 51 | } | |
| 52 | ||
| 53 | for_each_possible_cpu(cpu) { | |
| 54 | dev = &per_cpu(tegra_idle_device, cpu); | |
| 55 | dev->cpu = cpu; | |
| 56 | ||
| 57 | dev->state_count = drv->state_count; | |
| 58 | ret = cpuidle_register_device(dev); | |
| 59 | if (ret) { | |
| 60 | pr_err("CPU%u: CPUidle device registration failed\n", | |
| 61 | cpu); | |
| 62 | return ret; | |
| 63 | } | |
| 64 | } | |
| 65 | return 0; | |
| 66 | } |