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22b8b85d PDS |
1 | /* |
2 | * arch/arm/mach-tegra/cpuidle.c | |
3 | * | |
4 | * CPU idle driver for Tegra CPUs | |
5 | * | |
6 | * Copyright (c) 2010-2012, NVIDIA Corporation. | |
7 | * Copyright (c) 2011 Google, Inc. | |
8 | * Author: Colin Cross <ccross@android.com> | |
9 | * Gary King <gking@nvidia.com> | |
10 | * | |
11 | * Rework for 3.3 by Peter De Schrijver <pdeschrijver@nvidia.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
19 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
20 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
21 | * more details. | |
22 | */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/module.h> | |
22b8b85d | 26 | #include <linux/cpuidle.h> |
22b8b85d | 27 | |
d5db9a44 | 28 | #include <asm/cpuidle.h> |
22b8b85d PDS |
29 | |
30 | struct cpuidle_driver tegra_idle_driver = { | |
31 | .name = "tegra_idle", | |
32 | .owner = THIS_MODULE, | |
d5db9a44 | 33 | .en_core_tk_irqen = 1, |
22b8b85d PDS |
34 | .state_count = 1, |
35 | .states = { | |
d5db9a44 | 36 | [0] = ARM_CPUIDLE_WFI_STATE_PWR(600), |
22b8b85d PDS |
37 | }, |
38 | }; | |
39 | ||
40 | static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device); | |
41 | ||
22b8b85d PDS |
42 | static int __init tegra_cpuidle_init(void) |
43 | { | |
44 | int ret; | |
45 | unsigned int cpu; | |
46 | struct cpuidle_device *dev; | |
47 | struct cpuidle_driver *drv = &tegra_idle_driver; | |
48 | ||
49 | ret = cpuidle_register_driver(&tegra_idle_driver); | |
50 | if (ret) { | |
51 | pr_err("CPUidle driver registration failed\n"); | |
52 | return ret; | |
53 | } | |
54 | ||
55 | for_each_possible_cpu(cpu) { | |
56 | dev = &per_cpu(tegra_idle_device, cpu); | |
57 | dev->cpu = cpu; | |
58 | ||
59 | dev->state_count = drv->state_count; | |
60 | ret = cpuidle_register_device(dev); | |
61 | if (ret) { | |
62 | pr_err("CPU%u: CPUidle device registration failed\n", | |
63 | cpu); | |
64 | return ret; | |
65 | } | |
66 | } | |
67 | return 0; | |
68 | } | |
69 | device_initcall(tegra_cpuidle_init); |