0x00 - Microsoft: Type/Touch Cover

Technical information about Type/Touch Covers for Surface RT/2

I2C Specs

  • HID over I2C

  • Address: 0x00

  • Bus speed: 400kHz

  • HID_Descriptor: 0x0041

  • ACPI Device: SNMU

GPIO

HID Interrupt: O5 Hotplug Interrupt: S0

Issue

The tCover I2C address is 0x00. This address is reserved for general call. Linux doesn't allow I2C Slaves to use this address therefore the I2C driver must be patched to allow 0x00 as valid Slave address.

Implementation

i2c-hotplug-gpio is a grate driver and doesn't work in mainline.

VendorID / ProductID

Cover

Generation

VendorID

ProductID

Touch

1

045E

079A

Type

1

045E

079C

Touch

2

045E

07A7

Type

2

045E

07A9

Power

1

045E - tbc

0x07DA - tbc