linux-kernel - Re: [PATCH V2 08/13] dt-bindings: imx: gpcv2: add support for optional resets

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Date:   Fri, 7 May 2021 16:16:19 -0500
From:   Rob Herring <robh@...nel.org>
To:     Frieder Schrempf <frieder.schrempf@...tron.de>
Cc:     "Peng Fan (OSS)" <peng.fan@....nxp.com>, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, p.zabel@...gutronix.de, l.stach@...gutronix.de,
        krzk@...nel.org, agx@...xcpu.org, marex@...x.de,
        andrew.smirnov@...il.com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        ping.bai@....com, aford173@...il.com, abel.vesa@....com,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V2 08/13] dt-bindings: imx: gpcv2: add support for
 optional resets

On Thu, May 06, 2021 at 08:43:17AM +0200, Frieder Schrempf wrote:
> On 06.05.21 03:04, Peng Fan (OSS) wrote:
> > From: Lucas Stach <l.stach@...gutronix.de>
> > 
> > For some domains the resets of the devices in the domain are not
> > automatically triggered. Add an optional resets property to allow
> > the GPC driver to trigger those resets explicitly.
> > 
> > The resets belong to devices located inside the power domain,
> > which need to be held in reset across the power-up sequence. So we
> > have no means to specify what each reset is in a generic power-domain
> > binding. Same situation as with the clocks in this binding actually.
> 
> My understanding was that Rob wanted this explanation to be contained in the binding docs itself and not only in the commit message, but I might be wrong.

Yes, that would be better.

> 
> > 
> > Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >  Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml | 7 +++++++
> >  1 file changed, 7 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
> > index a96e6dbf1858..4330c73a2c30 100644
> > --- a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
> > +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
> > @@ -66,6 +66,13 @@ properties:
> >  
> >            power-supply: true
> >  
> > +          resets:
> > +            description: |
> > +              A number of phandles to resets that need to be asserted during
> > +              power-up sequencing of the domain.
> > +            minItems: 1
> > +            maxItems: 4
> > +
> >          required:
> >            - '#power-domain-cells'
> >            - reg
> >