mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-16 15:39:42 -04:00
Code Issues Packages Projects Releases Wiki Activity

can: canxl: support Remote Request Substitution bit access

Browse Source 
The Remote Request Substitution bit is a dominant bit ("0") in the CAN
XL frame. As some CAN XL controllers support to access this bit a new
CANXL_RRS value has been defined for the canxl_frame.flags element.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://patch.msgid.link/20250124142347.7444-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Oliver Hartkopp
2025-01-24 15:23:47 +01:00
committed by Marc Kleine-Budde
parent 6b89d89f21
commit e1b2c7e902
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/uapi/linux/can.h
View File

@@ -182,7 +182,7 @@ struct canfd_frame {
/*
* defined bits for canxl_frame.flags
*
* The canxl_frame.flags element contains two bits CANXL_XLF and CANXL_SEC
* The canxl_frame.flags element contains three bits CANXL_[XLF|SEC|RRS]
* and shares the relative position of the struct can[fd]_frame.len element.
* The CANXL_XLF bit ALWAYS needs to be set to indicate a valid CAN XL frame.
* As a side effect setting this bit intentionally breaks the length checks
@@ -192,6 +192,7 @@ struct canfd_frame {
*/
#define CANXL_XLF 0x80 /* mandatory CAN XL frame flag (must always be set!) */
#define CANXL_SEC 0x01 /* Simple Extended Content (security/segmentation) */
#define CANXL_RRS 0x02 /* Remote Request Substitution */
/* the 8-bit VCID is optionally placed in the canxl_frame.prio element */
#define CANXL_VCID_OFFSET 16 /* bit offset of VCID in prio element */