1.patch如下
--- a/drivers/usb/serial/option.c 2020-03-26 15:01:47.986237134 +0800
+++ b/drivers/usb/serial/option.c 2020-03-26 16:51:56.912568912 +0800
@@ -571,6 +571,18 @@
static const struct usb_device_id option_ids[] = {
+#if 1 //Added by Quectel
+ { USB_DEVICE(0x05C6, 0x9090) }, /* Quectel UC15 */
+ { USB_DEVICE(0x05C6, 0x9003) }, /* Quectel UC20 */
+ { USB_DEVICE(0x2C7C, 0x0125) }, /* Quectel EC25 */
+ { USB_DEVICE(0x2C7C, 0x0121) }, /* Quectel EC21 */
+ { USB_DEVICE(0x05C6, 0x9215) }, /* Quectel EC20 */
+ { USB_DEVICE(0x2C7C, 0x0191) }, /* Quectel EG91 */
+ { USB_DEVICE(0x2C7C, 0x0195) }, /* Quectel EG95 */
+ { USB_DEVICE(0x2C7C, 0x0306) }, /* Quectel EG06/EP06/EM06 */
+ { USB_DE