forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.1 KiB
53 lines
1.1 KiB
// 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 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); |
|
}
|
|
|