Files
OpenCellular/driver
Nicolas Boichat 3b33621d2f driver/led/lm3630a: Disable Bank B, avoid race setting brightness
It is not necessary to enable Bank B, as we do not use it.

Also, we have seen a race between enabling the banks and writing
the brightness register to 0xFF, where the chip would reset the
value after it has been set by EC. Adding a short 100us sleep
fixes the issue.

BRANCH=none
BUG=b:69379749
TEST=Flash whiskers, pwm 0 50 works, even after a cold reset.

Change-Id: Ic523a2475c3874c8433eb1b39e927793dd893e8f
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/906165
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Edward Hill <ecgh@chromium.org>
Reviewed-by: Benjamin Gordon <bmgordon@chromium.org>
2018-02-07 21:27:42 -08:00
..
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