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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-17 11:55:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-17 11:55:07 -0800 |
| commit | e535d74bc50df2357d3253f8f3ca48c66d0d892a (patch) | |
| tree | fceb1283000fec118000dc02bfe77bea4f512eb4 /Documentation/networking | |
| parent | ece6267878aed4eadff766112f1079984315d8c8 (diff) | |
| parent | ec3fc58b1e7a32cc9f552b306f8dbb4454e83798 (diff) | |
Merge tag 'docs-4.5' of git://git.lwn.net/linux
Pull documentation updates from Jon Corbet:
"A relatively boring cycle in the docs tree. There's a few kernel-doc
fixes and various document tweaks.
One patch reaches out of the documentation subtree to fix a comment in
init/do_mounts_rd.c. There didn't seem to be anybody more appropriate
to take that one, so I accepted it"
* tag 'docs-4.5' of git://git.lwn.net/linux: (29 commits)
thermal: add description for integral_cutoff unit
Documentation: update libhugetlbfs site url
Documentation: Explain pci=conf1,conf2 more verbosely
DMA-API: fix confusing sentence in Documentation/DMA-API.txt
Documentation: translations: update linux cross reference link
Documentation: fix typo in CodingStyle
init, Documentation: Remove ramdisk_blocksize mentions
Documentation-getdelays: Apply a recommendation from "checkpatch.pl" in main()
Documentation: HOWTO: update versions from 3.x to 4.x
Documentation: remove outdated references from translations
Doc: treewide: Fix grammar "a" to "an"
Documentation: cpu-hotplug: Fix sysfs mount instructions
can-doc: Add hint about getting timestamps
Fix CFQ I/O scheduler parameter name in documentation
Documentation: arm: remove dead links from Marvell Berlin docs
Documentation: HOWTO: update code cross reference link
Doc: Docbook/iio: Fix typo in iio.tmpl
DocBook: make index.html generation less verbose by default
DocBook: Cleanup: remove an unused $(call) line
DocBook: Add a help message for DOCBOOKS env var
...
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/can.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/networking/can.txt b/Documentation/networking/can.txt index 05fd83bb3596..6ab619fcc517 100644 --- a/Documentation/networking/can.txt +++ b/Documentation/networking/can.txt @@ -372,6 +372,15 @@ solution for a couple of reasons: nbytes = sendto(s, &frame, sizeof(struct can_frame), 0, (struct sockaddr*)&addr, sizeof(addr)); + An accurate timestamp can be obtained with an ioctl(2) call after reading + a message from the socket: + + struct timeval tv; + ioctl(s, SIOCGSTAMP, &tv); + + The timestamp has a resolution of one microsecond and is set automatically + at the reception of a CAN frame. + Remark about CAN FD (flexible data rate) support: Generally the handling of CAN FD is very similar to the formerly described |