[PATCH] usb: core: Ignore remote wakeup for Fintek ttyUSB device to fix S3 auto-wakeup

[Jie Deng]

The Fintek ttyUSB device (VID: 0x1934, PID: 0x1202)
has wake-up capability enabled by default, and changes
in the RTS/DTR signals can trigger a remote wake-up.
This behavior causes the system to be automatically
woken up from S3 (Suspend to RAM) state unexpectedly.

To prevent this unwanted auto-wakeup and ensure the system
can stay suspended, add the USB_QUIRK_IGNORE_REMOTE_WAKEUP
quirk to the device entry in usb_quirk_list.

Signed-off-by: Jie Deng <dengjie03@xxxxxxxxxx>
---
 drivers/usb/core/quirks.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index b5b577f0b931..b0856e05580e 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -528,6 +528,10 @@ static const struct usb_device_id usb_quirk_list[] = {
 	{ USB_DEVICE(0x1908, 0x1315), .driver_info =
 			USB_QUIRK_HONOR_BNUMINTERFACES },
 
+	/* Fintek ttyUSB Device */
+	{ USB_DEVICE(0x1934, 0x1202), .driver_info =
+		USB_QUIRK_IGNORE_REMOTE_WAKEUP },
+
 	/* Protocol and OTG Electrical Test Device */
 	{ USB_DEVICE(0x1a0a, 0x0200), .driver_info =
 			USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL },
-- 
2.25.1