54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2014 Freescale Semiconductor, Inc.
|
|
*/
|
|
|
|
#include <linux/clk/imx.h>
|
|
#include <linux/cpuidle.h>
|
|
#include <linux/module.h>
|
|
#include <asm/cpuidle.h>
|
|
|
|
#include "common.h"
|
|
#include "cpuidle.h"
|
|
|
|
static __cpuidle int imx6sl_enter_wait(struct cpuidle_device *dev,
|
|
struct cpuidle_driver *drv, int index)
|
|
{
|
|
imx6_set_lpm(WAIT_UNCLOCKED);
|
|
/*
|
|
* Software workaround for ERR005311, see function
|
|
* description for details.
|
|
*/
|
|
imx6sl_set_wait_clk(true);
|
|
cpu_do_idle();
|
|
imx6sl_set_wait_clk(false);
|
|
imx6_set_lpm(WAIT_CLOCKED);
|
|
|
|
return index;
|
|
}
|
|
|
|
static struct cpuidle_driver imx6sl_cpuidle_driver = {
|
|
.name = "imx6sl_cpuidle",
|
|
.owner = THIS_MODULE,
|
|
.states = {
|
|
/* WFI */
|
|
ARM_CPUIDLE_WFI_STATE,
|
|
/* WAIT */
|
|
{
|
|
.exit_latency = 50,
|
|
.target_residency = 75,
|
|
.flags = CPUIDLE_FLAG_TIMER_STOP,
|
|
.enter = imx6sl_enter_wait,
|
|
.name = "WAIT",
|
|
.desc = "Clock off",
|
|
},
|
|
},
|
|
.state_count = 2,
|
|
.safe_state_index = 0,
|
|
};
|
|
|
|
int __init imx6sl_cpuidle_init(void)
|
|
{
|
|
return cpuidle_register(&imx6sl_cpuidle_driver, NULL);
|
|
}
|