Alec Berg 23ff7f6517 lm4: ADC clock management bug fix ...

Fixed bug in which two different tasks reading two different ADC
channels could interfere and cause the ADC clock to get disabled
when a read is still in progress, thus causing a reboot.

Added a runtime assert to verify that developers don't sample the
same ADC channel from multiple different tasks, which could cause
hard to trace reboots.

BRANCH=none
BUG=chromium:313872
TEST=1) Added console command to continuously read an ADC channel not
read anywhere else. Verified that when running this console command
I could reproduce the bug every few minutes.
2) Wrote code in adc.c to protect the ADC clock resource.
3) Ran console command from step 1 for ~2 hours with no reboots.

Change-Id: Ic1905dde12871a4b93957702f7f31a25a2762bb4
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/175404
Reviewed-by: Randall Spangler <rspangler@chromium.org>

2013-11-01 23:08:24 +00:00

..

host

cleanup: Rename and move header files

2013-10-23 21:27:40 +00:00

lm4

lm4: ADC clock management bug fix

2013-11-01 23:08:24 +00:00

stm32

cleanup: Even more TODO comments

2013-11-01 20:07:24 +00:00