86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
|
|
* Runtime PM support code for OMAP
|
|
*
|
|
* Author: Kevin Hilman, Deep Root Systems, LLC
|
|
*
|
|
* Copyright (C) 2010 Texas Instruments, Inc.
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/io.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mutex.h>
|
|
|
|
#include <plat/omap_device.h>
|
|
#include <plat/omap-pm.h>
|
|
|
|
#ifdef CONFIG_PM_RUNTIME
|
|
int omap_pm_runtime_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
int r, ret = 0;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
ret = pm_generic_runtime_suspend(dev);
|
|
|
|
if (!ret && dev->parent == &omap_device_parent) {
|
|
r = omap_device_idle(pdev);
|
|
WARN_ON(r);
|
|
}
|
|
|
|
return ret;
|
|
};
|
|
|
|
int omap_pm_runtime_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
int r;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
if (dev->parent == &omap_device_parent) {
|
|
r = omap_device_enable(pdev);
|
|
WARN_ON(r);
|
|
}
|
|
|
|
return pm_generic_runtime_resume(dev);
|
|
};
|
|
#else
|
|
#define omap_pm_runtime_suspend NULL
|
|
#define omap_pm_runtime_resume NULL
|
|
#endif /* CONFIG_PM_RUNTIME */
|
|
|
|
static int __init omap_pm_runtime_init(void)
|
|
{
|
|
const struct dev_pm_ops *pm;
|
|
struct dev_pm_ops *omap_pm;
|
|
|
|
pm = platform_bus_get_pm_ops();
|
|
if (!pm) {
|
|
pr_err("%s: unable to get dev_pm_ops from platform_bus\n",
|
|
__func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL);
|
|
if (!omap_pm) {
|
|
pr_err("%s: unable to alloc memory for new dev_pm_ops\n",
|
|
__func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
omap_pm->runtime_suspend = omap_pm_runtime_suspend;
|
|
omap_pm->runtime_resume = omap_pm_runtime_resume;
|
|
|
|
platform_bus_set_pm_ops(omap_pm);
|
|
|
|
return 0;
|
|
}
|
|
core_initcall(omap_pm_runtime_init);
|