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Bluetooth: mediatek: add gpio pin to reset bt

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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>
This commit is contained in:
Zhangchao Zhang
2025-09-26 18:10:46 +08:00
committed by Luiz Augusto von Dentz
parent cbca440dc3
commit 484f117689
1 changed files with 13 additions and 0 deletions
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13
drivers/bluetooth/btusb.c
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@@ -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);