1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2014 Freescale Semiconductor, Inc.
4 */
5
6#include <linux/clk/imx.h>
7#include <linux/cpuidle.h>
8#include <linux/module.h>
9#include <asm/cpuidle.h>
10
11#include "common.h"
12#include "cpuidle.h"
13
14static __cpuidle int imx6sl_enter_wait(struct cpuidle_device *dev,
15				       struct cpuidle_driver *drv, int index)
16{
17	imx6_set_lpm(WAIT_UNCLOCKED);
18	/*
19	 * Software workaround for ERR005311, see function
20	 * description for details.
21	 */
22	imx6sl_set_wait_clk(true);
23	cpu_do_idle();
24	imx6sl_set_wait_clk(false);
25	imx6_set_lpm(WAIT_CLOCKED);
26
27	return index;
28}
29
30static struct cpuidle_driver imx6sl_cpuidle_driver = {
31	.name = "imx6sl_cpuidle",
32	.owner = THIS_MODULE,
33	.states = {
34		/* WFI */
35		ARM_CPUIDLE_WFI_STATE,
36		/* WAIT */
37		{
38			.exit_latency = 50,
39			.target_residency = 75,
40			.flags = CPUIDLE_FLAG_TIMER_STOP,
41			.enter = imx6sl_enter_wait,
42			.name = "WAIT",
43			.desc = "Clock off",
44		},
45	},
46	.state_count = 2,
47	.safe_state_index = 0,
48};
49
50int __init imx6sl_cpuidle_init(void)
51{
52	return cpuidle_register(&imx6sl_cpuidle_driver, NULL);
53}
54