Dear IIO/HID maintainers, I have a device, Surface Pro, that has the hid-sensor-hub and many sensors attached. With the help of Srinivas I was able to get them all working except for the magnometer. It uses the hid-magn-3d driver as it should but it does not contain an axis (X, Y, Z) usage attributes. Instead it only has a True North usage attribute. I see two solutions to this problem and was inquiring which one would work best? 1) Modify the hid-magn-3d driver to handle True North attribute. I realize there might not be many devices that have this so not sure if appropriate. I think this could be done; by passing a variable amount of IIO Channels when setting up the hid-magn-3d driver, depending on how many axis and/or if it find True/Magnetic North usage attribute. 2) Create a whole new driver that handles True/Magnetic North. This would not work on my device as it is set to Compass 3D Usage Attribute. This could be resolved by adding another quirk for the Surface to ensure it used the new driver. For both options I think we'd need a new IIO_MOD_NORTH for the iio_chan_spec, as the current ones don't really apply. I like the first solution as it could allow for handling of devices with only one or two axis present. I do realize if the hid-mangn-3d driver was changed it's name would not make sense anymore and the pattern I'm notcing is a driver for each HID Usage. Here's a link to the hid report description with some labels for my device: Bug 73321 Comment 7 https://bugzilla.kernel.org/show_bug.cgi?id=73321#c7 I'd be willing to work on this. Just wanted to know what would work best Thank You, Reyad Attiyat -- 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
