Commit 4b9e1bab authored Jul 11, 2014 by Nikita Edward Baruzdin Committed by Marc Kleine-Budde Jul 15, 2014

can: netlink: Add CAN_CTRLMODE_PRESUME_ACK flag



Most CAN controllers have a support for ignoring ACK absence. Some of
them refer to this feature as a self test mode (e. g. SJA1000) and some
include it as a part of a loopback mode (e. g. MCP2510).

Setting the introduced flag via netlink should make CAN controller
perform a successful transmission, even if there is no acknowledgement
(dominant ACK bit) received.

Signed-off-by: Nikita Edward Baruzdin <nebaruzdin@gmail.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

parent f736d998

include/uapi/linux/can/netlink.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -97,6 +97,7 @@ struct can_ctrlmode {
		#define CAN_CTRLMODE_ONE_SHOT 0x08 /* One-Shot mode */
		#define CAN_CTRLMODE_BERR_REPORTING 0x10 /* Bus-error reporting */
		#define CAN_CTRLMODE_FD 0x20 /* CAN FD mode */
		#define CAN_CTRLMODE_PRESUME_ACK 0x40 /* Ignore missing CAN ACKs */

		/*
		* CAN device statistics