This reverts commit 46ee4abb10a07bd8f8ce910ee6b4ae6a947d7f63.
CH341A has three different modes of operation selectable either by
hardware pin connections or by external EEPROM configuration. Each
mode is represented by corresponding product ID:
0x5523: Asyncronous Serial Interface
0x5584: Parallel Printer Interface
0x5512: EPP/MEM Interface
(See "5.3.Function configuration" in datasheet at wch-ic.com/downloads/CH341DS1_PDF.html)
When CH341A is configured as EPP/MEM Interface it appears as 1a86:5512 and being mistakenly
handled by ch341 USB serial driver.
It is possible to use CH341A in EPP/MEM mode only if ch341 module is blacklisted, but it must be
unblacklisted every time to use CH341A as a serial converter. Also obviously it is impossible
to use two CH341A boards in different modes simoultaneously.
Signed-off-by: Dmytro Bagrii <dimich.dmb@xxxxxxxxx>
---
drivers/usb/serial/ch341.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 29f4b87a9e74..65f1286f7905 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -81,7 +81,6 @@
#define CH341_QUIRK_SIMULATE_BREAK BIT(1)
static const struct usb_device_id id_table[] = {
- { USB_DEVICE(0x1a86, 0x5512) },
{ USB_DEVICE(0x1a86, 0x5523) },
{ USB_DEVICE(0x1a86, 0x7522) },
{ USB_DEVICE(0x1a86, 0x7523) },
--
2.35.1
