// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2016 Freescale Semiconductor, Inc.
 * Copyright 2017-2018 NXP
 *   Anson Huang <Anson.Huang@nxp.com>
 */

#include <linux/cpuidle.h>
#include <linux/module.h>
#include <asm/cpuidle.h>

#include "common.h"
#include "cpuidle.h"

static __cpuidle int imx7ulp_enter_wait(struct cpuidle_device *dev,
                                        struct cpuidle_driver *drv, int index)
{
        if (index == 1)
                imx7ulp_set_lpm(ULP_PM_WAIT);
        else
                imx7ulp_set_lpm(ULP_PM_STOP);

        cpu_do_idle();

        imx7ulp_set_lpm(ULP_PM_RUN);

        return index;
}

static struct cpuidle_driver imx7ulp_cpuidle_driver = {
        .name = "imx7ulp_cpuidle",
        .owner = THIS_MODULE,
        .states = {
                /* WFI */
                ARM_CPUIDLE_WFI_STATE,
                /* WAIT */
                {
                        .exit_latency = 50,
                        .target_residency = 75,
                        .enter = imx7ulp_enter_wait,
                        .name = "WAIT",
                        .desc = "PSTOP2",
                },
                /* STOP */
                {
                        .exit_latency = 100,
                        .target_residency = 150,
                        .enter = imx7ulp_enter_wait,
                        .name = "STOP",
                        .desc = "PSTOP1",
                },
        },
        .state_count = 3,
        .safe_state_index = 0,
};

int __init imx7ulp_cpuidle_init(void)
{
        return cpuidle_register(&imx7ulp_cpuidle_driver, NULL);
}