High power use ITE Tech 8350 - bug?

[Luciano <luciano@xxxxxxxxxxxx>]

Hi,

I have the aforementioned gyroscope sensor device handled by the
usbhid driver. I find that it uses a considerable amount of power
(relatively). When I look in powertop it shows a 40% use after a cold
boot, and after I awake from suspend-to-ram, it shows 100% usage at
around 700mw. That's roughly a tenth of the typical battery drain on
my laptop.
Is there any way I can try and diagnose this and
1. Find out what the typical power use should be?
2. How I can fix the 100% stuck power-usage on resume-from-suspend?

I'm on kernel 4.14.65.

Thanks!

Luciano

Bus 001 Device 003: ID 048d:8350 Integrated Technology Express, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x048d Integrated Technology Express, Inc.
  idProduct          0x8350
  bcdDevice           10.17
  iManufacturer           1
  iProduct                2
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.12
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength    2532
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1