The lock is used only for start / stop signaling.
It is used only for 'flags' field and the related condition variable.
This change is a follow-up to r354067, it was suggested by Warner in
D22107.
Suggested by: imp
MFC after: 1 week
This is similar to what is done around other calls that lead to
own_command_wait() that can sleep.
Reviewed by: imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D22107
only gpiobus configured via FDT is supported. Bus enumeration is
supported. Devices are created for each device found. 1-Wire
temperature controllers are supported, but other drivers could be
written. Temperatures are polled and reported via a sysctl. Errors
are reported via sysctl counters. Mis-wired bus detection is included
for more trouble shooting. See ow(4), owc(4) and ow_temp(4) for
details of what's supported and known issues.
This has been tested on Raspberry Pi-B, Pi2 and Beagle Bone Black
with up to 7 devices.
Differential Revision: https://reviews.freebsd.org/D2956
Relnotes: yes
MFC after: 2 weeks
Reviewed by: loos@ (with many insightful comments)
