On Fri, Oct 29, 2021 at 04:03:15PM -0400, Jim Quinlan wrote:

This Broadcom STB PCIe RC driver has one port and connects directly to one
device, be it a switch or an endpoint.  We want to be able to turn on/off
any regulators for that device.  Control of regulators is needed because of
the chicken-and-egg situation: although the regulator is "owned" by the
device and would be best handled by its driver, the device cannot be
discovered and probed unless its regulator is already turned on.

Reviwed-by: Mark Brown [off-list ref]