Hi, On Wed, Dec 16, 2015 at 2:22 PM, Crt Mori <cmo@xxxxxxxxxxx> wrote: > On 16 December 2015 at 22:41, Nish Aravamudan <nish.aravamudan@xxxxxxxxx> wrote: >> Hi Daniel, >> >> On Wed, Dec 16, 2015 at 1:43 AM, Daniel Baluta <daniel.baluta@xxxxxxxxx> wrote: >>> On Tue, Dec 15, 2015 at 9:19 PM, Nish Aravamudan >>> <nish.aravamudan@xxxxxxxxx> wrote: >>>> So, I apologize in advance for this relatively vague report, but I'm fairly sure >>>> the Yoga 900 has an accelerometer amongst other sensors (ambient light?) >>>> exported over IIO. >>>> >>>> But, these sensors seem to not be updating at all with a 4.4-rc5+ kernel (a >>>> set of patches from https://lkml.org/lkml/2015/11/30/441 applied to Linus' >>>> tree). >>>> >>>> The odd part is at some point in messing with this, I'm fairly sure it did work! >>>> That is, >>>> >>>> `watch -n 0.1 cat '/sys/bus/iio/devices/iio:device'*/*raw*` >>> >>> Can you send us a sample of the output? Also, would be >>> good to identify the exact driver for accel. >> >> cat /sys/bus/iio/devices/iio:device*/*raw* >> 65478 >> 7 >> 1023 >> 0 >> 0 >> 0 >> 100 >> -539062 >> -742187 >> 1292968 >> 1592 >> 64932 >> 2 >> 275 >> 0 0 0 0 >> >> Now, I should say that I distinctly remember at some point waving my >> laptop around and seeing these values change ... but now they seem to >> be "stuck". Maybe it's a hardware issue or something special that >> WIndows does to leverage the IIO sensors? >> >>> Perhaps: cat /sys/bus/iio/devices/iio:device'*/name >> >> $ cat /sys/bus/iio/devices/iio:device*/name >> accel_3d > > Can you list the directory of iio:device with this name (it is: > drivers/iio/accel/hid-sensor-accel-3d.c). > This is something you will be looking at for accel debugging, but it > seems more like > standard /sys/bus/iio/devices/iio:device0/name gyro_3d /sys/bus/iio/devices/iio:device1/name dev_rotation /sys/bus/iio/devices/iio:device2/name als /sys/bus/iio/devices/iio:device3/name magn_3d /sys/bus/iio/devices/iio:device4/name accel_3d /sys/bus/iio/devices/iio:device5/name incli_3d are all the IIO sensors, sorry about that! >> gyro_3d >> als >> magn_3d >> incli_3d >> dev_rotation >> >> >>>> >>>> showed updating values as I moved the laptop around. >>>> >>>> I've not done any accelerometer debugging before, so any suggestion on >>>> where to start would be greatly appreciated! >>> >>> Did you applied some patches and recompiled the kernel? Or when it did stopped >>> working? >> >> As far as I can tell, it only worked that one one time and hasn't >> since. Although your question does make me wonder *which* kernel I was >> on that I experienced the values changing. Let me go back to a stock >> 4.4-rc5 and see. > > Did you compile the stock kernel? It might be that .dts file you are > using (or defconfig) > is not correct. I compiled the stock kernel, based off the the Ubuntu 15.04 .config, trimmed to account for the hardware I have on the system. I can attach the .config if that will be useful. I just went back to 4.4-rc4 and it also didn't seem to have any updates to the raw file contents. -Nish -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
