To modify Ixia port numbers and IP in pod.yaml
[kvmfornfv.git] / kernel / arch / arm / mach-tegra / cpuidle-tegra114.c
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 <asm/firmware.h>
18 #include <linux/tick.h>
19 #include <linux/cpuidle.h>
20 #include <linux/cpu_pm.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23
24 #include <asm/cpuidle.h>
25 #include <asm/smp_plat.h>
26 #include <asm/suspend.h>
27 #include <asm/psci.h>
28
29 #include "pm.h"
30 #include "sleep.h"
31
32 #ifdef CONFIG_PM_SLEEP
33 #define TEGRA114_MAX_STATES 2
34 #else
35 #define TEGRA114_MAX_STATES 1
36 #endif
37
38 #ifdef CONFIG_PM_SLEEP
39 static int tegra114_idle_power_down(struct cpuidle_device *dev,
40                                     struct cpuidle_driver *drv,
41                                     int index)
42 {
43         local_fiq_disable();
44
45         tegra_set_cpu_in_lp2();
46         cpu_pm_enter();
47
48         call_firmware_op(prepare_idle);
49
50         /* Do suspend by ourselves if the firmware does not implement it */
51         if (call_firmware_op(do_idle, 0) == -ENOSYS)
52                 cpu_suspend(0, tegra30_sleep_cpu_secondary_finish);
53
54         cpu_pm_exit();
55         tegra_clear_cpu_in_lp2();
56
57         local_fiq_enable();
58
59         return index;
60 }
61
62 static void tegra114_idle_enter_freeze(struct cpuidle_device *dev,
63                                        struct cpuidle_driver *drv,
64                                        int index)
65 {
66        tegra114_idle_power_down(dev, drv, index);
67 }
68 #endif
69
70 static struct cpuidle_driver tegra_idle_driver = {
71         .name = "tegra_idle",
72         .owner = THIS_MODULE,
73         .state_count = TEGRA114_MAX_STATES,
74         .states = {
75                 [0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
76 #ifdef CONFIG_PM_SLEEP
77                 [1] = {
78                         .enter                  = tegra114_idle_power_down,
79                         .enter_freeze           = tegra114_idle_enter_freeze,
80                         .exit_latency           = 500,
81                         .target_residency       = 1000,
82                         .flags                  = CPUIDLE_FLAG_TIMER_STOP,
83                         .power_usage            = 0,
84                         .name                   = "powered-down",
85                         .desc                   = "CPU power gated",
86                 },
87 #endif
88         },
89 };
90
91 int __init tegra114_cpuidle_init(void)
92 {
93         if (!psci_smp_available())
94                 return cpuidle_register(&tegra_idle_driver, NULL);
95
96         return 0;
97 }