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USB: serial: cp210x: add support for TIOCGICOUNT

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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>
This commit is contained in:
Johan Hovold 2020-07-13 12:55:15 +02:00
parent a7207e9835
commit de9c7e9f27
1 changed files with 1 additions and 0 deletions
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drivers/usb/serial/cp210x.c
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@ -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,