(2011/11/01 21:57), Alan Cox wrote:

quoted

(pch_uart device has auto hardware flow control function. So,
pch_uart driver doesn't have to control modem status interrupt.)

This is true for flow control bits but not for incoming carrier detect ?

Called ".get_mctrl" function, other software can know incoming carrier 
detection.
Or you mean a uart driver must detect incoming carrier with interrupt ?

quoted

This patch deletes the code.

quoted

+	dev_info(priv->port.dev,
+		"PCH UART : Modem status interrupt is not
supported.\n"); }

dev_info seems wrong here. Does the user need to know this ?

OK, a user doesn't have to know the information.
I will delete the dev_info.

Thanks,
-- 
tomoya
ROHM Co., Ltd.