As far as the defconfig

http://git.kernel.org/?p=linux/kerne...config;hb=HEAD

Unless there is somewhere better?


I am just reading not editing...
USB_HID is enabled "Say Y here if you want full HID support to connect USB keyboards, mice, joysticks, graphic tablets, or any other HID based devices to your computer via USB, as well as Uninterruptible Power Supply (UPS) and monitor control devices." ... ?

CONFIG_USB_MUSB_OTG=y

worth looking closer than I have.

As far as magnetometers / digital compass, the only evidence I have of any driver at all is the one in the android tree, akm8976 . AFAIK it was never pushed upstream.
It's a tad hard to search because a lot of drivers are simply "adds support for this chip" which really doesn't say a lot. The akm8976 driver was put in the i2c directory instead of the hwmon directory where <some of> the accelerometers are.

Also if your device has a uart interface I suppose you might not bother with a device driver.

But yes, hope springs eternal. ;P I'm being ridiculously silly at this point but it's vaguely entertaining.