Re: [Regulator] Request for clarification - GPIO controlled regulator, USB VBUS,

[Åukasz Majewski]

Hi Mark,

Thank you for your reply.

> On Tue, Oct 03, 2017 at 06:58:00PM +0200, Åukasz Majewski wrote:
>
> > Have I overlooked something? Maybe there is any other mainline code, which I
> > could reuse?
>
> No, we don't support randomly toggling power for devices without their
> cooperation - it's not generally going to end well.  The reason it's
> difficult to do this is that it's a bad idea.

I do understand the rationale. No issues with this.

>  Perhaps this is something
> that could be implemented generically for USB as it's a hotpluggable bus

In this case we use VBUS as a power supply voltage. The problem with 
regulator API used in this case is that we enable it on boot-up, but 
then we cannot "symulate hotplug" anymore.

> but I'm not convinced.

Maybe, I can look into USB driver and see if the VBUS is manageable from 
there (so I could add some sysfs entry to control it if needed).


--
Best regards.

Åukasz Majewski