I2C Specs

• HID over I2C

• Address: 0x00

• Bus speed: 400kHz

• HID_Descriptor: 0x0041

• ACPI Device: SNMU

• Power:

  • Bridge IC: PMIC.REG1: 1.8V

  • tCover Power: PMIC.REG3: 2.8V

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

I2C Specs

• Normal I2C

• Address: 0x?

• Bus speed: 400kHz

• ACPI Device: ?

• HID over I2C

• Address: 0x28

• Bus speed: 400kHz

• HID_Descriptor: 0x0001

• ACPI Device: SNMU

Devices

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00: 00 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- 28 -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 

Physical Access