forked from Minki/linux
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
|
/*
|
||
|
|
* CPU idle driver for Tegra CPUs
|
||
|
|
*
|
||
|
|
* Copyright (c) 2010-2012, NVIDIA Corporation.
|
||
|
|
* Copyright (c) 2011 Google, Inc.
|
||
|
|
* Author: Colin Cross <ccross@android.com>
|
||
|
|
* Gary King <gking@nvidia.com>
|
||
|
|
*
|
||
|
|
* Rework for 3.3 by Peter De Schrijver <pdeschrijver@nvidia.com>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||
|
|
* more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/cpuidle.h>
|
||
|
|
|
||
|
|
#include <asm/cpuidle.h>
|
||
|
|
|
||
|
|
static struct cpuidle_driver tegra_idle_driver = {
|
||
|
|
.name = "tegra_idle",
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.en_core_tk_irqen = 1,
|
||
|
|
.state_count = 1,
|
||
|
|
.states = {
|
||
|
|
[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
|
||
|
|
|
||
|
|
int __init tegra20_cpuidle_init(void)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
unsigned int cpu;
|
||
|
|
struct cpuidle_device *dev;
|
||
|
|
struct cpuidle_driver *drv = &tegra_idle_driver;
|
||
|
|
|
||
|
|
ret = cpuidle_register_driver(&tegra_idle_driver);
|
||
|
|
if (ret) {
|
||
|
|
pr_err("CPUidle driver registration failed\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
for_each_possible_cpu(cpu) {
|
||
|
|
dev = &per_cpu(tegra_idle_device, cpu);
|
||
|
|
dev->cpu = cpu;
|
||
|
|
|
||
|
|
dev->state_count = drv->state_count;
|
||
|
|
ret = cpuidle_register_device(dev);
|
||
|
|
if (ret) {
|
||
|
|
pr_err("CPU%u: CPUidle device registration failed\n",
|
||
|
|
cpu);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|