Joseph Lo | 51dc525 | 2013-01-21 17:49:06 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013, NVIDIA Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/cpuidle.h> |
| 20 | |
| 21 | #include <asm/cpuidle.h> |
| 22 | |
| 23 | static struct cpuidle_driver tegra_idle_driver = { |
| 24 | .name = "tegra_idle", |
| 25 | .owner = THIS_MODULE, |
| 26 | .en_core_tk_irqen = 1, |
| 27 | .state_count = 1, |
| 28 | .states = { |
| 29 | [0] = ARM_CPUIDLE_WFI_STATE_PWR(600), |
| 30 | }, |
| 31 | }; |
| 32 | |
| 33 | static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device); |
| 34 | |
| 35 | int __init tegra114_cpuidle_init(void) |
| 36 | { |
| 37 | int ret; |
| 38 | unsigned int cpu; |
| 39 | struct cpuidle_device *dev; |
| 40 | struct cpuidle_driver *drv = &tegra_idle_driver; |
| 41 | |
| 42 | ret = cpuidle_register_driver(&tegra_idle_driver); |
| 43 | if (ret) { |
| 44 | pr_err("CPUidle driver registration failed\n"); |
| 45 | return ret; |
| 46 | } |
| 47 | |
| 48 | for_each_possible_cpu(cpu) { |
| 49 | dev = &per_cpu(tegra_idle_device, cpu); |
| 50 | dev->cpu = cpu; |
| 51 | |
| 52 | dev->state_count = drv->state_count; |
| 53 | ret = cpuidle_register_device(dev); |
| 54 | if (ret) { |
| 55 | pr_err("CPU%u: CPUidle device registration failed\n", |
| 56 | cpu); |
| 57 | return ret; |
| 58 | } |
| 59 | } |
| 60 | return 0; |
| 61 | } |