Re: [RFC 0/4] Intel Integrated Sensor Hub Support (ISH)

[Atri Bhattacharya <badshah400@aim.com>]

On Thu, 2016-06-02 at 15:48 -0700, Srinivas Pandruvada wrote:
> On Fri, 2016-06-03 at 00:29 +0200, Atri Bhattacharya wrote:
> > Hi Srinivas,
> > 
> > On Thu, 2016-06-02 at 21:44 +0000, Pandruvada, Srinivas wrote:
> > > 
> > > On Thu, 2016-06-02 at 13:00 -0700, Srinivas Pandruvada wrote:
> > > > 
> > > > Hi,
> > > > 
> > > > Thanks for your help in evaluation.
> > > > 
> > > > 
> > > > [...]
> > > > 
> > > > The iio sensor proxy starts too soon. So I recommended to wait
> > > > for
> > > > mult-user target before start. I think developer is
> > > > considering.
> > > > 
> > > Add after "Description" in the section [Unit] in systemd unit
> > > file
> > > /usr/lib/systemd/system/iio-sensor-proxy.service
> > > 
> > > After=multi-user.target
> > > 
> > > Your rotation should work on Yoga 260. I tried on Fedora 23.
> > > 
> > It does! Thank you so much for this tip. Well, it doesn't work
> > again
> > after suspend/wakeup but I will let you know if that issue gets
> > fixed
> > after the patched kernel finishes building.
> The problem is iio_proxy keeps open the IIO file handles, but ISH FW
> is
> will powerup again after suspend, which causes issue. So may be by
> systemd magic stop the service and start again on resume.
> 
> I am working on this. So probably in RFC v2, I will have some fix.
> 

One thing I just noticed is that the iio device number change after a
suspend/wakeup cycle. For e.g., immediately after booting the
in_accel_?_raw files are located in the dir
/sys/bus/iio/devices/iio\:device0/
but after a suspend/wakeup the in_accel files have moved to
/sys/bus/iio/devices/iio\:device3/
instead. No idea if this is relevant or not, just thought I should let
you know.

-- 
Atri Bhattacharya
Fri  3 Jun 04:47:15 CEST 2016

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