powerpc/pseries/ibmebus: Remove legacy suspend/resume support

There are no ibmebus driver that make use of legacy suspend/resume. This
patch removes the support for it from ibmebus framework, new ibmebus
driver (as unlikely as they are) wanting to use suspend/resume should
use dev_pm_ops.

Since there aren't any special bus specific things to do during
suspend/resume and since the PM core will automatically fallback
directly to using the device's PM ops if no bus PM ops are specified
there is no need to have any special ibmebus PM ops at all.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/pseries/ibmebus.c

@@ -423,303 +423,6 @@ static struct device_attribute ibmebus_bus_device_attrs[] = {
 	__ATTR_NULL
 };
 
-#ifdef CONFIG_PM_SLEEP
-static int ibmebus_bus_legacy_suspend(struct device *dev, pm_message_t mesg)
-{
-	struct platform_device *of_dev = to_platform_device(dev);
-	struct platform_driver *drv = to_platform_driver(dev->driver);
-	int ret = 0;
-
-	if (dev->driver && drv->suspend)
-		ret = drv->suspend(of_dev, mesg);
-	return ret;
-}
-
-static int ibmebus_bus_legacy_resume(struct device *dev)
-{
-	struct platform_device *of_dev = to_platform_device(dev);
-	struct platform_driver *drv = to_platform_driver(dev->driver);
-	int ret = 0;
-
-	if (dev->driver && drv->resume)
-		ret = drv->resume(of_dev);
-	return ret;
-}
-
-static int ibmebus_bus_pm_prepare(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (drv && drv->pm && drv->pm->prepare)
-		ret = drv->pm->prepare(dev);
-
-	return ret;
-}
-
-static void ibmebus_bus_pm_complete(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-
-	if (drv && drv->pm && drv->pm->complete)
-		drv->pm->complete(dev);
-}
-
-#ifdef CONFIG_SUSPEND
-
-static int ibmebus_bus_pm_suspend(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->suspend)
-			ret = drv->pm->suspend(dev);
-	} else {
-		ret = ibmebus_bus_legacy_suspend(dev, PMSG_SUSPEND);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_suspend_noirq(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->suspend_noirq)
-			ret = drv->pm->suspend_noirq(dev);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_resume(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->resume)
-			ret = drv->pm->resume(dev);
-	} else {
-		ret = ibmebus_bus_legacy_resume(dev);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_resume_noirq(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->resume_noirq)
-			ret = drv->pm->resume_noirq(dev);
-	}
-
-	return ret;
-}
-
-#else /* !CONFIG_SUSPEND */
-
-#define ibmebus_bus_pm_suspend		NULL
-#define ibmebus_bus_pm_resume		NULL
-#define ibmebus_bus_pm_suspend_noirq	NULL
-#define ibmebus_bus_pm_resume_noirq	NULL
-
-#endif /* !CONFIG_SUSPEND */
-
-#ifdef CONFIG_HIBERNATE_CALLBACKS
-
-static int ibmebus_bus_pm_freeze(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->freeze)
-			ret = drv->pm->freeze(dev);
-	} else {
-		ret = ibmebus_bus_legacy_suspend(dev, PMSG_FREEZE);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_freeze_noirq(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->freeze_noirq)
-			ret = drv->pm->freeze_noirq(dev);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_thaw(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->thaw)
-			ret = drv->pm->thaw(dev);
-	} else {
-		ret = ibmebus_bus_legacy_resume(dev);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_thaw_noirq(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->thaw_noirq)
-			ret = drv->pm->thaw_noirq(dev);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_poweroff(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->poweroff)
-			ret = drv->pm->poweroff(dev);
-	} else {
-		ret = ibmebus_bus_legacy_suspend(dev, PMSG_HIBERNATE);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_poweroff_noirq(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->poweroff_noirq)
-			ret = drv->pm->poweroff_noirq(dev);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_restore(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->restore)
-			ret = drv->pm->restore(dev);
-	} else {
-		ret = ibmebus_bus_legacy_resume(dev);
-	}
-
-	return ret;
-}
-
-static int ibmebus_bus_pm_restore_noirq(struct device *dev)
-{
-	struct device_driver *drv = dev->driver;
-	int ret = 0;
-
-	if (!drv)
-		return 0;
-
-	if (drv->pm) {
-		if (drv->pm->restore_noirq)
-			ret = drv->pm->restore_noirq(dev);
-	}
-
-	return ret;
-}
-
-#else /* !CONFIG_HIBERNATE_CALLBACKS */
-
-#define ibmebus_bus_pm_freeze		NULL
-#define ibmebus_bus_pm_thaw		NULL
-#define ibmebus_bus_pm_poweroff		NULL
-#define ibmebus_bus_pm_restore		NULL
-#define ibmebus_bus_pm_freeze_noirq	NULL
-#define ibmebus_bus_pm_thaw_noirq		NULL
-#define ibmebus_bus_pm_poweroff_noirq	NULL
-#define ibmebus_bus_pm_restore_noirq	NULL
-
-#endif /* !CONFIG_HIBERNATE_CALLBACKS */
-
-static struct dev_pm_ops ibmebus_bus_dev_pm_ops = {
-	.prepare = ibmebus_bus_pm_prepare,
-	.complete = ibmebus_bus_pm_complete,
-	.suspend = ibmebus_bus_pm_suspend,
-	.resume = ibmebus_bus_pm_resume,
-	.freeze = ibmebus_bus_pm_freeze,
-	.thaw = ibmebus_bus_pm_thaw,
-	.poweroff = ibmebus_bus_pm_poweroff,
-	.restore = ibmebus_bus_pm_restore,
-	.suspend_noirq = ibmebus_bus_pm_suspend_noirq,
-	.resume_noirq = ibmebus_bus_pm_resume_noirq,
-	.freeze_noirq = ibmebus_bus_pm_freeze_noirq,
-	.thaw_noirq = ibmebus_bus_pm_thaw_noirq,
-	.poweroff_noirq = ibmebus_bus_pm_poweroff_noirq,
-	.restore_noirq = ibmebus_bus_pm_restore_noirq,
-};
-
-#define IBMEBUS_BUS_PM_OPS_PTR	(&ibmebus_bus_dev_pm_ops)
-
-#else /* !CONFIG_PM_SLEEP */
-
-#define IBMEBUS_BUS_PM_OPS_PTR	NULL
-
-#endif /* !CONFIG_PM_SLEEP */
-
 struct bus_type ibmebus_bus_type = {
 	.name      = "ibmebus",
 	.uevent    = of_device_uevent_modalias,
@@ -729,7 +432,6 @@ struct bus_type ibmebus_bus_type = {
 	.remove    = ibmebus_bus_device_remove,
 	.shutdown  = ibmebus_bus_device_shutdown,
 	.dev_attrs = ibmebus_bus_device_attrs,
-	.pm        = IBMEBUS_BUS_PM_OPS_PTR,
 };
 EXPORT_SYMBOL(ibmebus_bus_type);