[yocto] meta-raspberrypi systemd rpi0-w bluetooth startup

[r10kindsofpeople]

Background:  I'm trying to bring up the pi zero w's bluetooth using
systemd.  Started with rocko and then moved to 'master' of meta-raspberry
pi, sync'd about a week ago after noticing that there were some recent
updates in this area.

There was an initial problem with /dev/serial1 not showing up...I found
udev-rules-rpi.bb, added it to my layer, and when it still didn't show up
in my rootfs, I punted and installed it in /etc/udev/rules.d by hand and
now /dev/serial1 shows up.  Given time, I can probably fix the recipe on my
own, so moving on.

But brcm43438.service still fails on boot.  Despite having
"After=dev-serial1.device" in the service Unit section, it fails with:

Mar 17 16:21:13 raspberrypi0-wifi systemd[1]: Started Broadcom BCM43438
bluetooth HCI.
Mar 17 16:21:14 raspberrypi0-wifi hciattach[105]: Can't open serial port:
No such file or directory
Mar 17 16:21:14 raspberrypi0-wifi hciattach[105]: Can't initialize device:
No such file or directory
Mar 17 16:21:14 raspberrypi0-wifi systemd[1]: [[0;1;39mbrcm43438.service:
Main process exited, code=exited, status=1/FAILURE[[0m
Mar 17 16:21:14 raspberrypi0-wifi systemd[1]: [[0;1;39mbrcm43438.service:
Unit entered failed state.[[0m
Mar 17 16:21:14 raspberrypi0-wifi systemd[1]: [[0;1;39mbrcm43438.service:
Failed with result 'exit-code'.[[0m

If, after booting and ssh'ing into pi, I restart the service, it starts
successfully.

Any hints about what I might change to get the brcm43438.service to start
correctly the first time (every time)?

John
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.yoctoproject.org/pipermail/yocto/attachments/20180317/cb54e03a/attachment.html>