Bluetooth: btmtksdio: Add in-band wakeup support

Commit ce64b3e94919 ("Bluetooth: mt7921s: Support wake on bluetooth")
adds the wake on bluethooth via a dedicated GPIO.

Extend the wake-on-bluetooth to use the SDIO DAT1 pin (in-band wakeup),
when supported by the SDIO host driver.

Co-developed-by: Yake Yang <yake.yang@mediatek.com>
Signed-off-by: Yake Yang <yake.yang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index d6700ef..f9a3444 100644 (file)
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -1282,6 +1282,13 @@ err:
        hci_reset_dev(hdev);
 }
 
+static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev)
+{
+       struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+
+       return device_may_wakeup(bdev->dev);
+}
+
 static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev)
 {
        struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
@@ -1349,6 +1356,14 @@ static int btmtksdio_probe(struct sdio_func *func,
        hdev->shutdown = btmtksdio_shutdown;
        hdev->send     = btmtksdio_send_frame;
        hdev->wakeup   = btmtksdio_sdio_wakeup;
+       /*
+        * If SDIO controller supports wake on Bluetooth, sending a wakeon
+        * command is not necessary.
+        */
+       if (device_can_wakeup(func->card->host->parent))
+               hdev->wakeup = btmtksdio_sdio_inband_wakeup;
+       else
+               hdev->wakeup = btmtksdio_sdio_wakeup;
        hdev->set_bdaddr = btmtk_set_bdaddr;
 
        SET_HCIDEV_DEV(hdev, &func->dev);