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OMAP: PM: omap_device: add system PM methods for PM domain handling

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In the omap_device PM domain callbacks, use omap_device idle/enable to
automatically manage device idle states during system suspend/resume.

If an omap_device has not already been runtime suspended, the
->suspend_noirq() method of the PM domain will use omap_device_idle()
to idle the HW after calling the driver's ->runtime_suspend()
callback.  Similarily, upon resume, if the device was suspended during
->suspend_noirq(), the ->resume_noirq() method of the PM domain will
use omap_device_enable() to enable the HW and then call the driver's
->runtime_resume() callback.

If a device has already been runtime suspended, the noirq methods of
the PM domain leave the device runtime suspended by default.

However, if a driver needs to runtime resume a device during suspend
(for example, to change its wakeup settings), it may do so using
pm_runtime_get* in it's ->suspend() callback.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Kevin Hilman 2011-07-12 22:48:19 +02:00 committed by Rafael J. Wysocki
parent 256a543597
commit c03f007a8b
2 changed files with 40 additions and 0 deletions
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4
arch/arm/plat-omap/include/plat/omap_device.h
View File

@ -44,6 +44,9 @@ extern struct device omap_device_parent;
#define OMAP_DEVICE_STATE_IDLE 2
#define OMAP_DEVICE_STATE_SHUTDOWN 3
/* omap_device.flags values */
#define OMAP_DEVICE_SUSPENDED BIT(0)
/**
* struct omap_device - omap_device wrapper for platform_devices
* @pdev: platform_device
@ -73,6 +76,7 @@ struct omap_device {
s8 pm_lat_level;
u8 hwmods_cnt;
u8 _state;
u8 flags;
};
/* Device driver interface (call via platform_data fn ptrs) */

36
arch/arm/plat-omap/omap_device.c
View File

@ -566,11 +566,47 @@ static int _od_runtime_resume(struct device *dev)
}
#endif
#ifdef CONFIG_SUSPEND
static int _od_suspend_noirq(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_device *od = to_omap_device(pdev);
int ret;
ret = pm_generic_suspend_noirq(dev);
if (!ret && !pm_runtime_status_suspended(dev)) {
if (pm_generic_runtime_suspend(dev) == 0) {
omap_device_idle(pdev);
od->flags |= OMAP_DEVICE_SUSPENDED;
}
}
return ret;
}
static int _od_resume_noirq(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_device *od = to_omap_device(pdev);
if ((od->flags & OMAP_DEVICE_SUSPENDED) &&
!pm_runtime_status_suspended(dev)) {
od->flags &= ~OMAP_DEVICE_SUSPENDED;
omap_device_enable(pdev);
pm_generic_runtime_resume(dev);
}
return pm_generic_resume_noirq(dev);
}
#endif
static struct dev_pm_domain omap_device_pm_domain = {
.ops = {
SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume,
_od_runtime_idle)
USE_PLATFORM_PM_SLEEP_OPS
SET_SYSTEM_SLEEP_PM_OPS(_od_suspend_noirq, _od_resume_noirq)
}
};