[Bug 195009] [patch]: [arm] Use 400 kHz as the default OMAP4 I2C bus speed
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bugzilla-noreply at freebsd.org
Sun Nov 16 04:16:02 UTC 2014
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195009
Ian Lepore <ian at FreeBSD.org> changed:
What |Removed |Added
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Status|Needs Triage |In Discussion
CC| |ian at FreeBSD.org
--- Comment #1 from Ian Lepore <ian at FreeBSD.org> ---
This isn't a great fix since the bus can actually run faster than 400KHz. The
real problem is that we've long lacked a way of configuring the speed of each
i2c bus in a system, so I attacked the problem from that angle. The patchset
is available for review or download here at
https://reviews.freebsd.org/D1174
This will allow you to set the bus speed from device hints, from the FDT data,
or from a loader.conf file using for example dev.iicbus.0.frequency=400000, or
it can be changed on the fly using a sysctl with the same oid/path.
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