projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 51dc5259 JL |
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> | |
| 3045cb33 JL |
20 | #include <linux/cpu_pm.h> |
| 21 | #include <linux/clockchips.h> | |
| 338f2aad | 22 | #include <asm/firmware.h> |
| 51dc5259 JL |
23 | |
| 24 | #include <asm/cpuidle.h> | |
| 3045cb33 JL |
25 | #include <asm/suspend.h> |
| 26 | #include <asm/smp_plat.h> | |
| 27 | ||
| 28 | #include "pm.h" | |
| 29 | #include "sleep.h" | |
| 30 | ||
| 31 | #ifdef CONFIG_PM_SLEEP | |
| 32 | #define TEGRA114_MAX_STATES 2 | |
| 33 | #else | |
| 34 | #define TEGRA114_MAX_STATES 1 | |
| 35 | #endif | |
| 36 | ||
| 37 | #ifdef CONFIG_PM_SLEEP | |
| 38 | static int tegra114_idle_power_down(struct cpuidle_device *dev, | |
| 39 | struct cpuidle_driver *drv, | |
| 40 | int index) | |
| 41 | { | |
| 42 | local_fiq_disable(); | |
| 43 | ||
| 44 | tegra_set_cpu_in_lp2(); | |
| 45 | cpu_pm_enter(); | |
| 46 | ||
| 47 | clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu); | |
| 48 | ||
| 338f2aad AC |
49 | call_firmware_op(prepare_idle); |
| 50 | ||
| 51 | /* Do suspend by ourselves if the firmware does not implement it */ | |
| 52 | if (call_firmware_op(do_idle) == -ENOSYS) | |
| 53 | cpu_suspend(0, tegra30_sleep_cpu_secondary_finish); | |
| 3045cb33 JL |
54 | |
| 55 | clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); | |
| 56 | ||
| 57 | cpu_pm_exit(); | |
| 58 | tegra_clear_cpu_in_lp2(); | |
| 59 | ||
| 60 | local_fiq_enable(); | |
| 61 | ||
| 62 | return index; | |
| 63 | } | |
| 64 | #endif | |
| 51dc5259 JL |
65 | |
| 66 | static struct cpuidle_driver tegra_idle_driver = { | |
| 67 | .name = "tegra_idle", | |
| 68 | .owner = THIS_MODULE, | |
| 3045cb33 | 69 | .state_count = TEGRA114_MAX_STATES, |
| 51dc5259 JL |
70 | .states = { |
| 71 | [0] = ARM_CPUIDLE_WFI_STATE_PWR(600), | |
| 3045cb33 JL |
72 | #ifdef CONFIG_PM_SLEEP |
| 73 | [1] = { | |
| 74 | .enter = tegra114_idle_power_down, | |
| 75 | .exit_latency = 500, | |
| 76 | .target_residency = 1000, | |
| 77 | .power_usage = 0, | |
| 78 | .flags = CPUIDLE_FLAG_TIME_VALID, | |
| 79 | .name = "powered-down", | |
| 80 | .desc = "CPU power gated", | |
| 81 | }, | |
| 82 | #endif | |
| 51dc5259 JL |
83 | }, |
| 84 | }; | |
| 85 | ||
| 51dc5259 JL |
86 | int __init tegra114_cpuidle_init(void) |
| 87 | { | |
| e158f9da | 88 | return cpuidle_register(&tegra_idle_driver, NULL); |
| 51dc5259 | 89 | } |