/*
 * Copyright (C) 2014 Eistec AB
 *
 * This file is subject to the terms and conditions of the GNU Lesser General
 * Public License v2.1. See the file LICENSE in the top level directory for more
 * details.
 */

/**
 * @ingroup     cpu_k60
 * @{
 *
 * @file
 * @brief       Implementation of the kernel's power management interface
 *
 * @author      Joakim Nohlgård <joakim.nohlgard@eistec.se>
 *
 * @}
 */

#include "cpu.h"
#include "arch/lpm_arch.h"

static inline void wait(void)
{
    /* Clear the SLEEPDEEP bit to make sure we go into WAIT (sleep) mode instead
     * of deep sleep.
     */
    SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;

    /* WFI instruction will start entry into WAIT mode */
    __WFI();
}

void lpm_arch_init(void)
{
    /* Stub waiting for https://github.com/RIOT-OS/RIOT/pull/2605 */
}

enum lpm_mode lpm_arch_set(enum lpm_mode target)
{
    switch (target) {
        case LPM_ON:
                /* MCU is active, do not go to low power */
                break;

        case LPM_IDLE:
        case LPM_SLEEP:
        case LPM_POWERDOWN:
        case LPM_OFF:
            wait();
            break;

        case LPM_UNKNOWN:
        default:
            break;
    }

    return 0;
}

enum lpm_mode lpm_arch_get(void)
{
    /* TODO */
    return LPM_ON;
}

void lpm_arch_awake(void)
{
    /* TODO */
}

void lpm_arch_begin_awake(void)
{
    /* TODO */
}

void lpm_arch_end_awake(void)
{
    /* TODO */
}