From: Sean Wang <sean.wang@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Signed-off-by: Yake Yang <yake.yang@xxxxxxxxxxxx>
Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
---
v2: enhance the patch description and comments
v3: add a way suggested by the AngeloGioacchino Del Regno that look
elegant and can avoid the addition of the BTMTKSDIO_INBAND_WAKEUP
flag
---
drivers/bluetooth/btmtksdio.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index d6700efcfe8c..f9a3444753c2 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -1282,6 +1282,13 @@ static void btmtksdio_cmd_timeout(struct hci_dev *hdev)
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);
--
2.25.1
