Contributors: 11
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Shawn Guo |
162 |
63.78% |
4 |
23.53% |
| Kohji Okuno |
27 |
10.63% |
1 |
5.88% |
| Lucas Stach |
23 |
9.06% |
1 |
5.88% |
| Rafael J. Wysocki |
12 |
4.72% |
1 |
5.88% |
| Ulf Hansson |
8 |
3.15% |
1 |
5.88% |
| Anson Huang |
7 |
2.76% |
3 |
17.65% |
| Sebastian Andrzej Siewior |
5 |
1.97% |
1 |
5.88% |
| Daniel Lezcano |
4 |
1.57% |
2 |
11.76% |
| Ben Dooks |
3 |
1.18% |
1 |
5.88% |
| Thomas Gleixner |
2 |
0.79% |
1 |
5.88% |
| Fabio Estevam |
1 |
0.39% |
1 |
5.88% |
| Total |
254 |
|
17 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Freescale Semiconductor, Inc.
*/
#include <linux/cpuidle.h>
#include <linux/module.h>
#include <asm/cpuidle.h>
#include <soc/imx/cpuidle.h>
#include "common.h"
#include "cpuidle.h"
#include "hardware.h"
static int num_idle_cpus = 0;
static DEFINE_RAW_SPINLOCK(cpuidle_lock);
static int imx6q_enter_wait(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
raw_spin_lock(&cpuidle_lock);
if (++num_idle_cpus == num_online_cpus())
imx6_set_lpm(WAIT_UNCLOCKED);
raw_spin_unlock(&cpuidle_lock);
rcu_idle_enter();
cpu_do_idle();
rcu_idle_exit();
raw_spin_lock(&cpuidle_lock);
if (num_idle_cpus-- == num_online_cpus())
imx6_set_lpm(WAIT_CLOCKED);
raw_spin_unlock(&cpuidle_lock);
return index;
}
static struct cpuidle_driver imx6q_cpuidle_driver = {
.name = "imx6q_cpuidle",
.owner = THIS_MODULE,
.states = {
/* WFI */
ARM_CPUIDLE_WFI_STATE,
/* WAIT */
{
.exit_latency = 50,
.target_residency = 75,
.flags = CPUIDLE_FLAG_TIMER_STOP | CPUIDLE_FLAG_RCU_IDLE,
.enter = imx6q_enter_wait,
.name = "WAIT",
.desc = "Clock off",
},
},
.state_count = 2,
.safe_state_index = 0,
};
/*
* i.MX6 Q/DL has an erratum (ERR006687) that prevents the FEC from waking the
* CPUs when they are in wait(unclocked) state. As the hardware workaround isn't
* applicable to all boards, disable the deeper idle state when the workaround
* isn't present and the FEC is in use.
*/
void imx6q_cpuidle_fec_irqs_used(void)
{
cpuidle_driver_state_disabled(&imx6q_cpuidle_driver, 1, true);
}
EXPORT_SYMBOL_GPL(imx6q_cpuidle_fec_irqs_used);
void imx6q_cpuidle_fec_irqs_unused(void)
{
cpuidle_driver_state_disabled(&imx6q_cpuidle_driver, 1, false);
}
EXPORT_SYMBOL_GPL(imx6q_cpuidle_fec_irqs_unused);
int __init imx6q_cpuidle_init(void)
{
/* Set INT_MEM_CLK_LPM bit to get a reliable WAIT mode support */
imx6_set_int_mem_clk_lpm(true);
return cpuidle_register(&imx6q_cpuidle_driver, NULL);
}