linux-kernel - [PATCH] Bluetooth: btusb: Add support for Mercusys MA530 Bluetooth adapter

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Message-ID: <a2451dab-004b-4c2f-909e-89b5875eb760@gmail.com>
Date: Sun, 31 Aug 2025 01:57:41 +0200
From: 3 <elespink@...il.com>
To: linux-bluetooth@...r.kernel.org
Cc: marcel@...tmann.org, luiz.dentz@...il.com, linux-kernel@...r.kernel.org
Subject: [PATCH] Bluetooth: btusb: Add support for Mercusys MA530 Bluetooth
 adapter

 From 5d970b05c726749908540bf7d5ee34d634bf16c2 Mon Sep 17 00:00:00 2001
From: elespink <elespink@...il.com>
Date: Sun, 31 Aug 2025 01:06:10 +0200
Subject: [PATCH] Bluetooth: btusb: Add support for Mercusys MA530 Bluetooth
  adapter

Add support for a Realtek-based Mercusys MA530 Bluetooth 5.3 USB dongle
which works with USB ID 2c4e:0115. This device was not recognized by the
kernel with the original device list and thus was non-functional.

The device is misreported in lsusb as "Mercucys INC Meucusys MA530 Adapter".
---
  drivers/bluetooth/btusb.c | 4 ++++
  1 file changed, 4 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 8085fabadde8..94984791e454 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -597,6 +597,10 @@ static const struct usb_device_id quirks_table[] = {
      { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
        .driver_info = BTUSB_REALTEK },

+    /* Mercusys MA530 Adapter */
+    { USB_DEVICE(0x2c4e, 0x0115), .driver_info = BTUSB_REALTEK |
+                             BTUSB_WIDEBAND_SPEECH },
+
      /* MediaTek Bluetooth devices */
      { USB_VENDOR_AND_INTERFACE_INFO(0x0e8d, 0xe0, 0x01, 0x01),
        .driver_info = BTUSB_MEDIATEK |
-- 
2.51.0