OMAP: PM: omap_device: add API to disable idle on suspend

By default, omap_devices will be automatically idled on suspend
(and re-enabled on resume.)  Using this new API, device init code
can disable this feature if desired.

NOTE: any driver/device that has been runtime PM converted should
      not be using this API.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

arch/arm/plat-omap/include/plat/omap_device.h

@@ -46,6 +46,7 @@ extern struct device omap_device_parent;
 
 /* omap_device.flags values */
 #define OMAP_DEVICE_SUSPENDED BIT(0)
+#define OMAP_DEVICE_NO_IDLE_ON_SUSPEND BIT(1)
 
 /**
  * struct omap_device - omap_device wrapper for platform_devices
@@ -121,6 +122,10 @@ int omap_device_enable_hwmods(struct omap_device *od);
 int omap_device_disable_clocks(struct omap_device *od);
 int omap_device_enable_clocks(struct omap_device *od);
 
+static inline void omap_device_disable_idle_on_suspend(struct omap_device *od)
+{
+	od->flags |= OMAP_DEVICE_NO_IDLE_ON_SUSPEND;
+}
 
 /*
  * Entries should be kept in latency order ascending

arch/arm/plat-omap/omap_device.c

@@ -573,6 +573,9 @@ static int _od_suspend_noirq(struct device *dev)
 	struct omap_device *od = to_omap_device(pdev);
 	int ret;
 
+	if (od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND)
+		return pm_generic_suspend_noirq(dev);
+
 	ret = pm_generic_suspend_noirq(dev);
 
 	if (!ret && !pm_runtime_status_suspended(dev)) {
@@ -590,6 +593,9 @@ 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_NO_IDLE_ON_SUSPEND)
+		return pm_generic_resume_noirq(dev);
+
 	if ((od->flags & OMAP_DEVICE_SUSPENDED) &&
 	    !pm_runtime_status_suspended(dev)) {
 		od->flags &= ~OMAP_DEVICE_SUSPENDED;