On Thu, Dec 17, 2015 at 5:00 PM, Pandruvada, Srinivas <srinivas.pandruv...@intel.com> wrote: > Hi Andy, > > As per Nish these patches are impacting sensors on Yoga. > https://lkml.org/lkml/2015/11/30/441
To be clear, without that series, the touchpad and touchscreen on the Yoga 900 don't work at all. So they are necessary for functioning. I don't know (I will test it now), if removing the series makes the IIO sensors work properly in /dev/. -Nish > On Thu, 2015-12-17 at 16:51 -0800, Srinivas Pandruvada wrote: >> On Thu, 2015-12-17 at 15:38 -0800, Nish Aravamudan wrote: >> > [Starting a new thread from https://lkml.org/lkml/2015/12/15/663, >> > as >> > now my laptop is displaying values in the sysfs *raw* files.] >> > >> > So I'm trying to understand exactly how the hid-sensor-accel-3d >> > driver works. >> > >> > If I turn up debugging, when I `cat >> > /sys/bus/iio/devices/device*/*raw*`, I see "iio iio:device3: >> > accel_3d_proc_event" and I think that means that >> > hid_sensor_push_data() is getting called. >> > >> > But read()'s on /dev/iio:device3 never produces anything, which is >> > what iio-sensor-proxy uses to translate events to dbus. >> > >> > Is it expected that the dev-node is "silent"? Just trying to >> > understand if an extension to the driver to support a chardev based >> > output is appropriate, or if iio-sensor-proxy needs to be changed >> > to >> > handle this device. >> >> You are saying there is some regression. This used to work and now it >> doesn't work. Is raw values are displayed correctly, when you do >> "cat"? >> If cat of raw values is working then power on of sensors is working. >> >> Turn on HID debug prints. If it is regression we can do git bisect. >> Any ACPI or PM changes can break this. Usually there will be GPIOs >> which will be involved in power on, where ACPI comes into play. This >> will be done by i2c-hid. There are some prints in i2c-hid which can >> be >> enabled also. >> >> Thanks, >> Srinivas >> >> > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
