USB: serial: cp210x: add support for TIOCGICOUNT
Enable TIOCGICOUNT to allow reading out the (unused) interrupt counters
and error statistics.
Note that modem-status events are currently left unimplemented as they
appear to be buffered on at least CP2102 and therefore cannot be used to
implement TIOCMIWAIT.
Link: https://lore.kernel.org/r/20200713105517.27796-4-johan@kernel.org
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 02e4acb..3a65be4 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -291,6 +291,7 @@ static struct usb_serial_driver cp210x_device = {
.unthrottle = usb_serial_generic_unthrottle,
.tiocmget = cp210x_tiocmget,
.tiocmset = cp210x_tiocmset,
+ .get_icount = usb_serial_generic_get_icount,
.attach = cp210x_attach,
.disconnect = cp210x_disconnect,
.release = cp210x_release,