Messages in this thread | | | Subject | Re: [Regulator] Request for clarification - GPIO controlled regulator, USB VBUS, | From | Łukasz Majewski <> | Date | Wed, 4 Oct 2017 12:45:39 +0200 |
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Hi Mark,
Thank you for your reply.
> On Tue, Oct 03, 2017 at 06:58:00PM +0200, Łukasz 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.
Łukasz Majewski
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