Bluetooth: btmtksdio: enable bluetooth wakeup in system suspend

The BTMTKSDIO_BT_WAKE_ENABLED flag is set for bluetooth interrupt
during system suspend and increases wakeup count for bluetooth event.
Signed-off-by: Zhengping Jiang <jiangzp@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

drivers/bluetooth/btmtksdio.c

@@ -118,6 +118,7 @@ MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
 #define BTMTKSDIO_FUNC_ENABLED		3
 #define BTMTKSDIO_PATCH_ENABLED		4
 #define BTMTKSDIO_HW_RESET_ACTIVE	5
+#define BTMTKSDIO_BT_WAKE_ENABLED	6
 
 struct mtkbtsdio_hdr {
 	__le16	len;
@@ -554,7 +555,7 @@ static void btmtksdio_txrx_work(struct work_struct *work)
 	sdio_claim_host(bdev->func);
 
 	/* Disable interrupt */
-	sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
+	sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
 
 	txrx_timeout = jiffies + 5 * HZ;
 
@@ -576,7 +577,7 @@ static void btmtksdio_txrx_work(struct work_struct *work)
 		if ((int_status & FW_MAILBOX_INT) &&
 		    bdev->data->chipid == 0x7921) {
 			sdio_writel(bdev->func, PH2DSM0R_DRIVER_OWN,
-				    MTK_REG_PH2DSM0R, 0);
+				    MTK_REG_PH2DSM0R, NULL);
 		}
 
 		if (int_status & FW_OWN_BACK_INT)
@@ -608,7 +609,7 @@ static void btmtksdio_txrx_work(struct work_struct *work)
 	} while (int_status || time_is_before_jiffies(txrx_timeout));
 
 	/* Enable interrupt */
-	sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, 0);
+	sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL);
 
 	sdio_release_host(bdev->func);
 
@@ -620,8 +621,14 @@ static void btmtksdio_interrupt(struct sdio_func *func)
 {
 	struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
 
+	if (test_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state)) {
+		if (bdev->hdev->suspended)
+			pm_wakeup_event(bdev->dev, 0);
+		clear_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state);
+	}
+
 	/* Disable interrupt */
-	sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
+	sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
 
 	schedule_work(&bdev->txrx_work);
 }
@@ -1454,6 +1461,23 @@ static int btmtksdio_runtime_suspend(struct device *dev)
 	return err;
 }
 
+static int btmtksdio_system_suspend(struct device *dev)
+{
+	struct sdio_func *func = dev_to_sdio_func(dev);
+	struct btmtksdio_dev *bdev;
+
+	bdev = sdio_get_drvdata(func);
+	if (!bdev)
+		return 0;
+
+	if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
+		return 0;
+
+	set_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state);
+
+	return btmtksdio_runtime_suspend(dev);
+}
+
 static int btmtksdio_runtime_resume(struct device *dev)
 {
 	struct sdio_func *func = dev_to_sdio_func(dev);
@@ -1474,8 +1498,16 @@ static int btmtksdio_runtime_resume(struct device *dev)
 	return err;
 }
 
-static UNIVERSAL_DEV_PM_OPS(btmtksdio_pm_ops, btmtksdio_runtime_suspend,
-			    btmtksdio_runtime_resume, NULL);
+static int btmtksdio_system_resume(struct device *dev)
+{
+	return btmtksdio_runtime_resume(dev);
+}
+
+static const struct dev_pm_ops btmtksdio_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(btmtksdio_system_suspend, btmtksdio_system_resume)
+	RUNTIME_PM_OPS(btmtksdio_runtime_suspend, btmtksdio_runtime_resume, NULL)
+};
+
 #define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
 #else	/* CONFIG_PM */
 #define BTMTKSDIO_PM_OPS NULL