From 2290aefa2e90a43af8555ad6431d49de43259aa3 Mon Sep 17 00:00:00 2001 From: Franklin S Cooper Jr Date: Wed, 10 Jan 2018 16:25:18 +0530 Subject: can: dev: Add support for limiting configured bitrate Various CAN or CAN-FD IP may be able to run at a faster rate than what the transceiver the CAN node is connected to. This can lead to unexpected errors. However, CAN transceivers typically have fixed limitations and provide no means to discover these limitations at runtime. Therefore, add support for a can-transceiver node that can be reused by other CAN peripheral drivers to determine for both CAN and CAN-FD what the max bitrate that can be used. If the user tries to configure CAN to pass these maximum bitrates it will throw an error. Also add support for reading bitrate_max via the netlink interface. Reviewed-by: Suman Anna Signed-off-by: Franklin S Cooper Jr [nsekhar@ti.com: fix build error with !CONFIG_OF] Signed-off-by: Sekhar Nori Signed-off-by: Faiz Abbas Signed-off-by: Marc Kleine-Budde --- include/uapi/linux/can/netlink.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi/linux/can/netlink.h') diff --git a/include/uapi/linux/can/netlink.h b/include/uapi/linux/can/netlink.h index 96710e76d5ce..9f56fad4785b 100644 --- a/include/uapi/linux/can/netlink.h +++ b/include/uapi/linux/can/netlink.h @@ -132,6 +132,7 @@ enum { IFLA_CAN_TERMINATION_CONST, IFLA_CAN_BITRATE_CONST, IFLA_CAN_DATA_BITRATE_CONST, + IFLA_CAN_BITRATE_MAX, __IFLA_CAN_MAX }; -- cgit v1.2.3