1/*
2 * Copyright (C) 2014 Freescale Semiconductor, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/cpuidle.h>
10#include <linux/module.h>
11#include <asm/cpuidle.h>
12
13#include "common.h"
14#include "cpuidle.h"
15
16static int imx6sl_enter_wait(struct cpuidle_device *dev,
17			    struct cpuidle_driver *drv, int index)
18{
19	imx6q_set_lpm(WAIT_UNCLOCKED);
20	/*
21	 * Software workaround for ERR005311, see function
22	 * description for details.
23	 */
24	imx6sl_set_wait_clk(true);
25	cpu_do_idle();
26	imx6sl_set_wait_clk(false);
27	imx6q_set_lpm(WAIT_CLOCKED);
28
29	return index;
30}
31
32static struct cpuidle_driver imx6sl_cpuidle_driver = {
33	.name = "imx6sl_cpuidle",
34	.owner = THIS_MODULE,
35	.states = {
36		/* WFI */
37		ARM_CPUIDLE_WFI_STATE,
38		/* WAIT */
39		{
40			.exit_latency = 50,
41			.target_residency = 75,
42			.flags = CPUIDLE_FLAG_TIMER_STOP,
43			.enter = imx6sl_enter_wait,
44			.name = "WAIT",
45			.desc = "Clock off",
46		},
47	},
48	.state_count = 2,
49	.safe_state_index = 0,
50};
51
52int __init imx6sl_cpuidle_init(void)
53{
54	return cpuidle_register(&imx6sl_cpuidle_driver, NULL);
55}
56