linux-kernel - Re: [PATCH net-next v9 6/6] net: dt-bindings: dwmac: add support for mt8195

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Message-ID: <151fc4556ba03703dffa30aeb8f24aee489c855c.camel@mediatek.com>
Date:   Thu, 16 Dec 2021 10:34:04 +0800
From:   Biao Huang <biao.huang@...iatek.com>
To:     Rob Herring <robh@...nel.org>
CC:     <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <srv_heupstream@...iatek.com>, <macpaul.lin@...iatek.com>,
        <angelogioacchino.delregno@...labora.com>, <dkirjanov@...e.de>
Subject: Re: [PATCH net-next v9 6/6] net: dt-bindings: dwmac: add support
 for mt8195

Dear Rob,
	Thanks for your comments~
On Wed, 2021-12-15 at 16:13 -0600, Rob Herring wrote:
> On Wed, Dec 15, 2021 at 10:16:52AM +0800, Biao Huang wrote:
> > Add binding document for the ethernet on mt8195.
> > 
> > Signed-off-by: Biao Huang <biao.huang@...iatek.com>
> > ---
> >  .../bindings/net/mediatek-dwmac.yaml          | 42 ++++++++++++++-
> > ----
> >  1 file changed, 32 insertions(+), 10 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/mediatek-
> > dwmac.yaml b/Documentation/devicetree/bindings/net/mediatek-
> > dwmac.yaml
> > index 8ad6e19661b8..44d55146def4 100644
> > --- a/Documentation/devicetree/bindings/net/mediatek-dwmac.yaml
> > +++ b/Documentation/devicetree/bindings/net/mediatek-dwmac.yaml
> > @@ -19,6 +19,7 @@ select:
> >        contains:
> >          enum:
> >            - mediatek,mt2712-gmac
> > +          - mediatek,mt8195-gmac
> >    required:
> >      - compatible
> >  
> > @@ -27,26 +28,37 @@ allOf:
> >  
> >  properties:
> >    compatible:
> > -    items:
> > -      - enum:
> > -          - mediatek,mt2712-gmac
> > -      - const: snps,dwmac-4.20a
> > +    oneOf:
> > +      - items:
> > +          - enum:
> > +              - mediatek,mt2712-gmac
> > +          - const: snps,dwmac-4.20a
> > +      - items:
> > +          - enum:
> > +              - mediatek,mt8195-gmac
> > +          - const: snps,dwmac-5.10a
> >  
> >    clocks:
> > +    minItems: 5
> 
> As before, you need 'minItems: 4' in the previous patch.
> 
> If you aren't clear what's needed, run 'make dtbs_checks' yourself 
> before submitting again.

But as modified in "[PATCH net-next v9 3/6] arm64: dts: mt2712: update
ethernet device node", we expect "minItems: 5".

run 'make dtbs_checks' with "[PATCH net-next v9 3/6] arm64: dts:
mt2712: update ethernet device node" applied, will not report logs such
as "ethernet@...1c000: clock-names: ['axi', 'apb', 'mac_main',
'ptp_ref'] is too short".

Should it be fine if I keep "minItems:5"?
> 
> >      items:
> >        - description: AXI clock
> >        - description: APB clock
> >        - description: MAC Main clock
> >        - description: PTP clock
> >        - description: RMII reference clock provided by MAC
> > +      - description: MAC clock gate
> >  
> >    clock-names:
> > -    items:
> > -      - const: axi
> > -      - const: apb
> > -      - const: mac_main
> > -      - const: ptp_ref
> > -      - const: rmii_internal
> > +    minItems: 5
> > +    maxItems: 6
> > +    contains:
> 
> No, you just threw out the order requirements. And this schema will
> be 
> true with just 1 of the strings below plus any other strings. For 
> example, this will pass:
> 
> clock-names = "foo", "bar", "axi", "baz", "rob";
I misunderstood this schema, 
and how about the following description:

clock-names:
  minItems: 5
  maxItems: 6
  items:
    - const: axi
    - const: apb
    - const: mac_main
    - const: ptp_ref
    - const: rmii_internal
    - const: mac_cg

Regards!
> 
> > +      enum:
> > +        - axi
> > +        - apb
> > +        - mac_main
> > +        - ptp_ref
> > +        - rmii_internal
> > +        - mac_cg
> >  
> >    mediatek,pericfg:
> >      $ref: /schemas/types.yaml#/definitions/phandle
> > @@ -61,6 +73,8 @@ properties:
> >        or will round down. Range 0~31*170.
> >        For MT2712 RMII/MII interface, Allowed value need to be a
> > multiple of 550,
> >        or will round down. Range 0~31*550.
> > +      For MT8195 RGMII/RMII/MII interface, Allowed value need to
> > be a multiple of 290,
> > +      or will round down. Range 0~31*290.
> >  
> >    mediatek,rx-delay-ps:
> >      description:
> > @@ -69,6 +83,8 @@ properties:
> >        or will round down. Range 0~31*170.
> >        For MT2712 RMII/MII interface, Allowed value need to be a
> > multiple of 550,
> >        or will round down. Range 0~31*550.
> > +      For MT8195 RGMII/RMII/MII interface, Allowed value need to
> > be a multiple
> > +      of 290, or will round down. Range 0~31*290.
> >  
> >    mediatek,rmii-rxc:
> >      type: boolean
> > @@ -102,6 +118,12 @@ properties:
> >        3. the inside clock, which be sent to MAC, will be inversed
> > in RMII case when
> >           the reference clock is from MAC.
> >  
> > +  mediatek,mac-wol:
> > +    type: boolean
> > +    description:
> > +      If present, indicates that MAC supports WOL(Wake-On-LAN),
> > and MAC WOL will be enabled.
> > +      Otherwise, PHY WOL is perferred.
> > +
> >  required:
> >    - compatible
> >    - reg
> > -- 
> > 2.25.1
> > 
> >