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| author |  Oliver Hartkopp <socketcan@hartkopp.net>
| 2020-11-19 09:49:21 +0100 |
|---|---|---|
| committer |  Marc Kleine-Budde <mkl@pengutronix.de>
| 2020-11-20 12:05:14 +0100 |
| commit | 94c23097f991cd4568388564b3d2816b0b83f924 (patch) | |
| tree | c206200379d41453f89e3d1293d7d87f6bddf324 /Documentation | |
| parent | can: drivers: add len8_dlc support for esd_usb2 CAN adapter (diff) | |
| download | linux-94c23097f991cd4568388564b3d2816b0b83f924.tar.gz linux-94c23097f991cd4568388564b3d2816b0b83f924.tar.bz2 linux-94c23097f991cd4568388564b3d2816b0b83f924.zip | |
can: gw: support modification of Classical CAN DLCs
Add support for data length code modifications for Classical CAN.
The netlink configuration interface always allowed to pass any value
that fits into a byte, therefore only the modification process had to be
extended to handle the raw DLC represenation of Classical CAN frames.
When a DLC value from 0 .. F is provided for Classical CAN frame
modifications the 'len' value is modified as-is with the exception that
potentially existing 9 .. F DLC values in the len8_dlc element are moved
to the 'len' element for the modification operation by mod_retrieve_ccdlc().
After the modification the Classical CAN frame DLC information is brought
back into the correct format by mod_store_ccdlc() which is filling 'len'
and 'len8_dlc' accordingly.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/r/20201119084921.2621-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions