Function _pm_frequency_scaling

components/drivers/pm/pm.c:172–189

* This function will update the system clock frequency when idle */

 * This function will update the system clock frequency when idle
 */
static void _pm_frequency_scaling(struct rt_pm *pm)
{
    rt_base_t level = 0;

    if (pm->flags & RT_PM_FREQUENCY_PENDING)
    {
        level = rt_hw_interrupt_disable();
        /* change system runing mode */
        if(pm->ops->run != RT_NULL)
        {
            pm->ops->run(pm, pm->run_mode);
        }
        /* changer device frequency */
        _pm_device_frequency_change(pm->run_mode);
        pm->flags &= ~RT_PM_FREQUENCY_PENDING;
        rt_hw_interrupt_enable(level);
    }
}

/**
 * judge sleep mode from sleep request