[I2C Host] I2C test plan

[johngt]

Description

This issue details what has been tested as part of the I2C Host test plan.

• The following I2C features
  • Speeds
    • Standard-mode (100 kbaud)
  • irqs
    • stretch_timeout
  • Clock stretching.
    • Timeout.
    • During write.
    • During read.
• Read and write all registers of the sensors:
  • Power/current monitor https://github.com/lowRISC/ot-discrete-eg/issues/12
    • Driver written
    • Tested manually
    • Integrated into testing
  • Temperature/humidity sensor https://github.com/lowRISC/ot-discrete-eg/issues/13
    • Driver written
    • Tested manually
  • Compass https://github.com/lowRISC/ot-discrete-eg/issues/14
    • Driver written
    • Tested manually
  • Accelerometer https://github.com/lowRISC/ot-discrete-eg/issues/15
    • Tested manually
  • Ambient light detector https://github.com/lowRISC/ot-discrete-eg/issues/16
    • Tested manually
  • Gas sensor https://github.com/lowRISC/ot-discrete-eg/issues/17
    • Tested manually

Note that due to part numbers being sensitive - that the specific details are kept in an embargoed repo.