[PATCH v4 07/13] USB: ch341: add debug output for chip version

[Grigori Goronzy]

There are at least two hardware revisions, this may be helpful in
case compatibility issues need to be debugged.

Signed-off-by: Grigori Goronzy <greg@xxxxxxxxxxxx>
---
 drivers/usb/serial/ch341.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 2fbec4a..e475677 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -209,6 +209,7 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv)
 	r = ch341_control_in(dev, CH341_VERSION, 0, 0, buffer, size);
 	if (r < 0)
 		goto out;
+	dev_dbg(&dev->dev, "Chip version: %d\n", buffer[0]);
 
 	r = ch341_control_out(dev, CH341_SERIAL_INIT, 0, 0);
 	if (r < 0)
-- 
1.9.1