diff options
| author | Zhangchao Zhang <ot_zhangchao.zhang@mediatek.com> | 2025-09-26 18:10:46 +0800 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2025-12-01 15:58:54 -0500 |
| commit | 484f1176896e85b5ae4f04403c8cd5b79aced95e (patch) | |
| tree | 377be546373494784cc94a836c40d6eb927b89e7 | |
| parent | cbca440dc329b39f18a1121e385aed830bbdfb12 (diff) | |
Bluetooth: mediatek: add gpio pin to reset bt
Support the platform Bluetooth to be reset by hardware pin,
when a Bluetooth exception occurs, attempt to reset the
Bluetooth module using the hardware reset pin, as this
method is generally more stable and reliable than a
software reset. If the hardware reset pin is not specified
in the device tree, fall back to the existing software
reset mechanism to ensure backward compatibility.
Co-developed: Sean Wang <Sean.Wang@mediatek.com>
Co-developed: Hao Qin <hao.qin@mediatek.com>
Co-developed: Chris Lu <chris.lu@mediatek.com>
Signed-off-by: Zhangchao Zhang <ot_zhangchao.zhang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
| -rw-r--r-- | drivers/bluetooth/btusb.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index fa683bb7f0b4..9bfa55cb7acf 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2808,6 +2808,19 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data) btusb_stop_traffic(data); usb_kill_anchored_urbs(&data->tx_anchor); + /* Toggle the hard reset line. The MediaTek device is going to + * yank itself off the USB and then replug. The cleanup is handled + * correctly on the way out (standard USB disconnect), and the new + * device is detected cleanly and bound to the driver again like + * it should be. + */ + if (data->reset_gpio) { + gpiod_set_value_cansleep(data->reset_gpio, 1); + msleep(200); + gpiod_set_value_cansleep(data->reset_gpio, 0); + return 0; + } + err = btmtk_usb_subsys_reset(hdev, btmtk_data->dev_id); usb_queue_reset_device(data->intf); |