linux-kernel - Re: [PATCHv1 3/5] dt-bindings: phy: rockchip: rk3588 has two reset lines

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Message-ID: <20230418214454.m24t2s3lnsukwppn@mercury.elektranox.org>
Date:   Tue, 18 Apr 2023 23:44:54 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Heiko Stuebner <heiko@...ech.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        linux-ide@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCHv1 3/5] dt-bindings: phy: rockchip: rk3588 has two reset
 lines

Hello Rob,

On Tue, Apr 18, 2023 at 03:41:36PM -0500, Rob Herring wrote:
> On Thu, Apr 13, 2023 at 08:23:43PM +0200, Sebastian Reichel wrote:
> > The RK3588 has two reset lines for the combphy. One for the
> > APB interface and one for the actual PHY.
> > 
> > Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> > ---
> >  .../bindings/phy/phy-rockchip-naneng-combphy.yaml          | 7 ++++++-
> >  1 file changed, 6 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-naneng-combphy.yaml b/Documentation/devicetree/bindings/phy/phy-rockchip-naneng-combphy.yaml
> > index 9ae514fa7533..bac1aae07555 100644
> > --- a/Documentation/devicetree/bindings/phy/phy-rockchip-naneng-combphy.yaml
> > +++ b/Documentation/devicetree/bindings/phy/phy-rockchip-naneng-combphy.yaml
> > @@ -31,8 +31,13 @@ properties:
> >        - const: pipe
> >  
> >    resets:
> > +    minItems: 1
> > +    maxItems: 2
> > +
> > +  reset-names:
> >      items:
> > -      - description: exclusive PHY reset line
> > +      - const: phy
> > +      - const: apb
> 
> This will fail on any existing users with single entry. You need to add 
> 'minItems: 1' here.
> 
> It also fails if they didn't use 'phy' as the name, but names should be 
> defined.

My understanding is, there there currently are users with one entry
and no reset-names. I suppose its sensible not to provide a
reset-name, iff there is only one line. As far as I can tell that
should still work after my changes.

-- Sebastian

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