satip-axe/kernel/drivers/stm/pm_runtime.c

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/*
* -------------------------------------------------------------------------
* Copyright (C) 2010 STMicroelectronics Limited
* Author: Francesco M. Virlinzi <francesco.virlinzi@st.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* ------------------------------------------------------------------------- */
#include <linux/device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
/*
* The following functions will give the minimal
* support to use the PM_RUNTIME support on
* the platform_bus bus
*/
int platform_pm_runtime_suspend(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int ret;
ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : -EINVAL;
return ret;
}
int platform_pm_runtime_resume(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int ret;
ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : -EINVAL;
return ret;
}
int platform_pm_runtime_idle(struct device *dev)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int ret;
if (pm && pm->runtime_idle) {
ret = pm->runtime_idle(dev);
if (ret)
return ret;
}
return 0;
}