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

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Message-ID: <20171004103213.4ezs6ie6z6dq7pvh@sirena.co.uk>
Date:   Wed, 4 Oct 2017 11:32:13 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Łukasz Majewski <l.majewski@...ess.pl>
Cc:     linux-input@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Liam Girdwood <lgirdwood@...il.com>
Subject: Re: [Regulator] Request for clarification - GPIO controlled
 regulator, USB VBUS,

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.  Perhaps this is something
that could be implemented generically for USB as it's a hotpluggable bus
but I'm not convinced.

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