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

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>

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index f7d2ff77008a..b93cfdc9a366 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -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)
 	}
 };