linux-kernel - Re: [PATCH 1/5] reset: add acquired/released state for exclusive reset controls

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Message-ID: <1553013474.6482.5.camel@pengutronix.de>
Date:   Tue, 19 Mar 2019 17:37:54 +0100
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] reset: add acquired/released state for exclusive
 reset controls

Hi Thierry,

On Thu, 2019-02-21 at 16:28 +0100, Thierry Reding wrote:
> On Thu, Feb 21, 2019 at 04:25:53PM +0100, Thierry Reding wrote:
> > From: Philipp Zabel <p.zabel@...gutronix.de>
> > 
> > There are cases where a driver needs explicit control over a reset line
> > that is exclusively conneted to its device, but this control has to be
> > temporarily handed over to the power domain controller to handle reset
> > requirements during power transitions.
> > Allow multiple exclusive reset controls to be requested in 'released'
> > state for the same physical reset line, only one of which can be
> > acquired at the same time.
> > 
> > Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
> > Signed-off-by: Thierry Reding <treding@...dia.com>
> > ---
> >  drivers/reset/core.c  | 139 ++++++++++++++++++++++++++++++++++++++----
> >  include/linux/reset.h |  93 ++++++++++++++++++++++------
> >  2 files changed, 200 insertions(+), 32 deletions(-)
> 
> Hi Philipp,
> 
> the bulk of this is unchanged relative to what you had posted
> originally. I squashed in the few things that we had already discussed
> earlier (EINVAL -> EPERM) and a couple of minor fixes for issues that I
> found while working with this.
> 
> Attached is my fixup patch which contains all the changes I made on top
> of your version and that I squashed into this.

I have no further comments on this, I find all these changes either
necessary or useful.

regards
Philipp