linux-kernel - Re: [PATCH 2/2] leds: lp50xx: remove unused regulator

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Date:   Thu, 4 Feb 2021 15:47:28 +0100
From:   Pavel Machek <pavel@....cz>
To:     Dan Murphy <dmurphy@...com>
Cc:     Sven Schuchmann <schuchmann@...leissheimer.de>,
        Rob Herring <robh+dt@...nel.org>, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] leds: lp50xx: remove unused regulator

On Wed 2021-02-03 10:02:00, Dan Murphy wrote:
> Pavel
> 
> On 2/3/21 8:23 AM, Pavel Machek wrote:
> > On Wed 2021-02-03 07:49:35, Dan Murphy wrote:
> > > Pavel
> > > 
> > > On 2/3/21 3:02 AM, Pavel Machek wrote:
> > > > On Wed 2021-02-03 08:34:08, Sven Schuchmann wrote:
> > > > > The regulator for vled-supply is unused in the driver.
> > > > > It is just assigned from DT and disabled in lp50xx_remove.
> > > > > So the code can be removed from the driver.
> > > > Dan, what is going on here? Do we need to also enable the regulator,
> > > > or is the removal correct thing to do?
> > > > 
> > > I think it would be better to do an enable as opposed to removing the code.
> > > 
> > > This would be needed especially in applications that have to meet strict
> > > power management requirements.
> > > 
> > > Users may want to disable or enable the regulator during suspend/resume.
> > > Otherwise it would be considered always-on and the regulator does not need
> > > to be populated.
> > Do you have set up where this is needed and you can test this? Will
> > you submit the fixes?
> 
> No I use an always on regulator in my setup. I have no managed supplies
> exposed.

Hmm, that is not ideal :-(. Can you try to provide patch, anyway?

Best regards,
								Pavel
-- 
http://www.livejournal.com/~pavelmachek

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