linux-kernel - Re: [PATCH v2] regulators: bd718x7: Add enable times

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Message-ID: <20201221081254.GA2984@bogon.m.sigxcpu.org>
Date:   Mon, 21 Dec 2020 09:12:54 +0100
From:   Guido Günther <agx@...xcpu.org>
To:     "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>
Cc:     "lgirdwood@...il.com" <lgirdwood@...il.com>,
        linux-power <linux-power@...rohmeurope.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] regulators: bd718x7: Add enable times

Hi,
On Mon, Dec 21, 2020 at 06:08:15AM +0000, Vaittinen, Matti wrote:
> 
> On Fri, 2020-12-18 at 19:38 +0100, Guido Günther wrote:
> > Use the typical startup times from the data sheet so boards get a
> > reasonable default. Not setting any enable time can lead to board
> > hangs
> > when e.g. clocks are enabled too soon afterwards.
> > 
> > This fixes gpu power domain resume on the Librem 5.
> > 
> > Signed-off-by: Guido Günther <agx@...xcpu.org>
> > 
> > ---
> > v2
> > - As per review comment by Matti Vaittinen
> >   
> > https://lore.kernel.org/lkml/beba25e85db20649aa040fc0ae549895c9265f6f.camel@fi.rohmeurope.com/
> >   Use defines instead of plain values
> > - As per review comment by Mark Brown
> >   https://lore.kernel.org/lkml/20201216130637.GC4861@sirena.org.uk/
> >   Drop cover letter
> > ---
> >  drivers/regulator/bd718x7-regulator.c | 27 ++++++++++++++++++++++++
> >  include/linux/mfd/rohm-bd718x7.h      | 30 
> 
> Thanks again Guido.
> I might have preferred having the defines in bd718x7-regulator.c as
> they are not likely to be used outside this file. That would have

In fact that's where I had them first, then noticing other regulator
related defines in the mfd header. I can shift those around need be.
Cheers,
 -- Guido

> strictly limited the change to regulator subsystem. Having them in the
> header is still fine with me if it works for Mark & others. (I don't
> think these defines need much of changes in the future).
> 
> Reviewed-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> 
> 
> Best Regards
>  Matti Vaittinen
>