Bluetooth: btmrvl_sdio: Refactor irq wakeup

Use device_init_wakeup to allow the Bluetooth dev to wake the system
from suspend. Currently, the device can wake the system but no
power/wakeup entry is created in sysfs to allow userspace to disable
wakeup.
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btmrvl_sdio.c

@@ -111,6 +111,9 @@ static int btmrvl_sdio_probe_of(struct device *dev,
 					"Failed to request irq_bt %d (%d)\n",
 					cfg->irq_bt, ret);
 			}
+
+			/* Configure wakeup (enabled by default) */
+			device_init_wakeup(dev, true);
 			disable_irq(cfg->irq_bt);
 		}
 	}
@@ -1654,6 +1657,7 @@ static void btmrvl_sdio_remove(struct sdio_func *func)
 							MODULE_SHUTDOWN_REQ);
 				btmrvl_sdio_disable_host_int(card);
 			}
+
 			BT_DBG("unregister dev");
 			card->priv->surprise_removed = true;
 			btmrvl_sdio_unregister_dev(card);
@@ -1690,7 +1694,8 @@ static int btmrvl_sdio_suspend(struct device *dev)
 	}
 
 	/* Enable platform specific wakeup interrupt */
-	if (card->plt_wake_cfg && card->plt_wake_cfg->irq_bt >= 0) {
+	if (card->plt_wake_cfg && card->plt_wake_cfg->irq_bt >= 0 &&
+	    device_may_wakeup(dev)) {
 		card->plt_wake_cfg->wake_by_bt = false;
 		enable_irq(card->plt_wake_cfg->irq_bt);
 		enable_irq_wake(card->plt_wake_cfg->irq_bt);
@@ -1707,7 +1712,8 @@ static int btmrvl_sdio_suspend(struct device *dev)
 			BT_ERR("HS not activated, suspend failed!");
 			/* Disable platform specific wakeup interrupt */
 			if (card->plt_wake_cfg &&
-			    card->plt_wake_cfg->irq_bt >= 0) {
+			    card->plt_wake_cfg->irq_bt >= 0 &&
+			    device_may_wakeup(dev)) {
 				disable_irq_wake(card->plt_wake_cfg->irq_bt);
 				disable_irq(card->plt_wake_cfg->irq_bt);
 			}
@@ -1767,7 +1773,8 @@ static int btmrvl_sdio_resume(struct device *dev)
 	hci_resume_dev(hcidev);
 
 	/* Disable platform specific wakeup interrupt */
-	if (card->plt_wake_cfg && card->plt_wake_cfg->irq_bt >= 0) {
+	if (card->plt_wake_cfg && card->plt_wake_cfg->irq_bt >= 0 &&
+	    device_may_wakeup(dev)) {
 		disable_irq_wake(card->plt_wake_cfg->irq_bt);
 		disable_irq(card->plt_wake_cfg->irq_bt);
 		if (card->plt_wake_cfg->wake_by_bt)