Startup Verification

[RealET]

Rather than wait for a pre-set duration prior to startup, poll the sensor until we can read the proper vendor ID, then move forward. From logging with our hardware, seems to take between 1.5 and 2.5s to for the PMW3610 to initialize. Others may have different times but this approach should be more flexible and not require tuning.

This might deprecate CONFIG_PMW3610_INIT_POWER_UP_EXTRA_DELAY_MS. What do you think @badjeff ?

[badjeff]

I'd recommend to reset the data->async_init_step if you want to reverse init proc to specific checkpoint. And add a retry count & interval in KConfig.

[RealET]

Ah, yeah, good idea. I implemented those changes and also got rid of PMW3610_INIT_POWER_UP_EXTRA_DELAY_MS since it is probably deprecated with these changes. Any reason to keep it in?