servo v4 does not power on uServo on init |
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Issue descriptionThe latest fw with the latest servo v4 build doesn't power on the uServo on init, but when initialized with servod, will then power on the uServo. This will cause problems during deployment since none of the uServo controls will be available until servod is restarted (causing deployment to fail). A new servo v4 fw will be needed to fix this. The workaround if we can't fix this before the deployment is to run the initial deployment script, watch it fail, run the following command on the labstationand then rerun the deployment: # ssh root@<labstation hostname> # for PORT in $(ls /var/lib/servod/config_* | cut -d _ -f 2); do restart servod PORT=$PORT; done All of the config files should be created and servod started on the v4s so the uServo will get powered on but not detected in time, a restart of servod should then properly initialize the uServo with the v4. I'll take a first pass to see why the uServo isn't powered on since the fw should be doing it. Nick might have an idea of what might be the issue though.
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Sep 30 2016
nevermind, it's not a one-off, all the servo v4s exhibit this (plugging all servo v4s into a guado, only see 18d1:501b in lsusb, after running servod for the servo v4, then 18d1:501a pops up).
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Oct 8 2016
The following revision refers to this bug: https://chromium.googlesource.com/chromiumos/platform/ec/+/155b8d6100b92921efe185c101cd2f90072e0b2f commit 155b8d6100b92921efe185c101cd2f90072e0b2f Author: Nick Sanders <nsanders@chromium.org> Date: Fri Oct 07 03:55:41 2016 servo_v4: update uservo port init for tca6416 Make sure that ioexpander is set to output, and that the uservo usb power enable is set. BUG= chromium:651860 TEST=check that servo micro is initialized properly BRANCH=None Change-Id: Iff994c63cd333933d51db38202a41b7b6fc86d66 Signed-off-by: Nick Sanders <nsanders@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/395186 Reviewed-by: Kevin Cheng <kevcheng@chromium.org> [modify] https://crrev.com/155b8d6100b92921efe185c101cd2f90072e0b2f/board/servo_v4/board.c
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Oct 10 2016
Flashed ToT on servo v4 and uServo comes up, will be writing up a script to update the fw on the v4 (to retain the serial) and giving instructions to lab.
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Oct 10 2016
I'd recommend not using dfu for update since you will need to plug and unplug it with the OTG cable.. You can use the ec usb updater (in ec/extras/usb_updater) which will preserve the serial number. You'll need to update RO and RW in two steps.
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Oct 12 2016
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Comment 1 by kevcheng@chromium.org
, Sep 30 2016Owner: kevcheng@chromium.org