i2c bit banging timeout for SCL
Poul-Henning Kamp
phk at phk.freebsd.dk
Mon Jul 1 17:14:51 UTC 2019
--------
In message <CANCZdfoFBvmxPtnEL4GOqXTvp6Zd-xrtja4rmUO1rAcy0JdeSw at mail.gmail.com>, Warner Losh writes:
>The only issue, really, is that this timeout is a busy loop and there may
>be I/O bus contention introduced on these systems.
Does it have to be a busy loop for the entire duration ?
Spin for the median, timeout+poll for the rest of the time ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
More information about the freebsd-current
mailing list