Re: [PATCH v3 2/3] usb: typec: cros_ec_ucsi: Load driver from OF and ACPI definitions

[Jameson Thies]

Hi Dmitry,
on early ChromeOS devices using this driver it gets added as a
subdevice of the cros_ec_dev mfd. But, we want to change this to load
the device from OF/ACPI nodes. The issue here is that older devices
which don't define the OF/ACPI nodes to load cros_ec_ucsi will still
need to add the device through cros_ec_dev.

So cros_ec_ucsi needs to support multiple methods of being
instantiated, and going through cros_ec_dev creates an intermediary
device in the path which doesn't exist when the driver is loaded
through OF/ACPI. I'll add a comment explaining this in the v4 series.