diff options
| author | Jarkko Nikula <[email protected]> | 2022-05-12 15:41:43 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <[email protected]> | 2022-05-14 20:49:09 +0200 |
| commit | 14ea4a470494528c7e88da5c4116c24eb027059f (patch) | |
| tree | 68a5ba260ca0cb0b30f4c768bffdc9f227956267 /tools/perf/scripts | |
| parent | f3f19f939c11925dadd3f4776f99f8c278a7017b (diff) | |
Revert "can: m_can: pci: use custom bit timings for Elkhart Lake"
This reverts commit 0e8ffdf3b86dfd44b651f91b12fcae76c25c453b.
Commit 0e8ffdf3b86d ("can: m_can: pci: use custom bit timings for
Elkhart Lake") broke the test case using bitrate switching.
| ip link set can0 up type can bitrate 500000 dbitrate 4000000 fd on
| ip link set can1 up type can bitrate 500000 dbitrate 4000000 fd on
| candump can0 &
| cangen can1 -I 0x800 -L 64 -e -fb \
| -D 11223344deadbeef55667788feedf00daabbccdd44332211 -n 1 -v -v
Above commit does everything correctly according to the datasheet.
However datasheet wasn't correct.
I got confirmation from hardware engineers that the actual CAN
hardware on Intel Elkhart Lake is based on M_CAN version v3.2.0.
Datasheet was mirroring values from an another specification which was
based on earlier M_CAN version leading to wrong bit timings.
Therefore revert the commit and switch back to common bit timings.
Fixes: ea4c1787685d ("can: m_can: pci: use custom bit timings for Elkhart Lake")
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Jarkko Nikula <[email protected]>
Reported-by: Chee Hou Ong <[email protected]>
Reported-by: Aman Kumar <[email protected]>
Reported-by: Pallavi Kumari <[email protected]>
Cc: <[email protected]> # v5.16+
Signed-off-by: Marc Kleine-Budde <[email protected]>
Diffstat (limited to 'tools/perf/scripts')
0 files changed, 0 insertions, 0 deletions