netdev - Re: [RFC PATCH 5/8] dt-bindings: net: pcs: add bindings for MediaTek USXGMII PCS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Sat, 11 Nov 2023 09:13:53 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Daniel Golle <daniel@...rotopia.org>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Chunfeng Yun
 <chunfeng.yun@...iatek.com>, Vinod Koul <vkoul@...nel.org>,
 Kishon Vijay Abraham I <kishon@...nel.org>, Felix Fietkau <nbd@....name>,
 John Crispin <john@...ozen.org>, Sean Wang <sean.wang@...iatek.com>,
 Mark Lee <Mark-MC.Lee@...iatek.com>, Lorenzo Bianconi <lorenzo@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
 Russell King <linux@...linux.org.uk>, Alexander Couzens <lynxis@...0.eu>,
 Philipp Zabel <p.zabel@...gutronix.de>, 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-phy@...ts.infradead.org
Subject: Re: [RFC PATCH 5/8] dt-bindings: net: pcs: add bindings for MediaTek
 USXGMII PCS

On 09/11/2023 22:51, Daniel Golle wrote:
> MediaTek's USXGMII can be found in the MT7988 SoC. We need to access
> it in order to configure and monitor the Ethernet SerDes link in
> USXGMII, 10GBase-R and 5GBase-R mode. By including a wrapped
> legacy 1000Base-X/2500Base-X/Cisco SGMII LynxI PCS as well, those
> interface modes are also available.
> 

A nit, subject: drop second/last, redundant "bindings for". The
"dt-bindings" prefix is already stating that these are bindings.

> Signed-off-by: Daniel Golle <daniel@...rotopia.org>
> ---
>  .../bindings/net/pcs/mediatek,usxgmii.yaml    | 105 ++++++++++++++++++

Use compatible as filename (especially that you do not expect it to grow).

>  1 file changed, 105 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/pcs/mediatek,usxgmii.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/pcs/mediatek,usxgmii.yaml b/Documentation/devicetree/bindings/net/pcs/mediatek,usxgmii.yaml
> new file mode 100644
> index 0000000000000..199cf47859e31
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/pcs/mediatek,usxgmii.yaml
> @@ -0,0 +1,105 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/pcs/mediatek,usxgmii.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek USXGMII PCS

MT7888 I guess?

> +
> +maintainers:
> +  - Daniel Golle <daniel@...rotopia.org>
> +
> +description:
> +  The MediaTek USXGMII PCS provides physical link control and status
> +  for USXGMII, 10GBase-R and 5GBase-R links on the SerDes interfaces
> +  provided by the PEXTP PHY.
> +  In order to also support legacy 2500Base-X, 1000Base-X and Cisco
> +  SGMII an existing mediatek,*-sgmiisys LynxI PCS is wrapped to
> +  provide those interfaces modes on the same SerDes interfaces shared
> +  with the USXGMII PCS.
> +
> +properties:
> +  $nodename:
> +    pattern: "^pcs@[0-9a-f]+$"

Drop, we do not enforce naming in individual device schemas.

> +
> +  compatible:
> +    const: mediatek,mt7988-usxgmiisys
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: USXGMII top-level clock
> +      - description: SGMII top-level clock
> +      - description: SGMII subsystem TX clock
> +      - description: SGMII subsystem RX clock
> +      - description: XFI PLL clock
> +
> +  clock-names:
> +    items:
> +      - const: usxgmii
> +      - const: sgmii_sel
> +      - const: sgmii_tx
> +      - const: sgmii_rx
> +      - const: xfi_pll
> +
> +  phys:
> +    items:
> +      - description: PEXTP SerDes PHY
> +
> +  mediatek,sgmiisys:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description:
> +      Phandle to the syscon node of the corresponding SGMII LynxI PCS.

"syscon node" is Linux term. Instead describe to what part of hardware
this phandle is and why do you need it.

> +
> +  resets:
> +    items:
> +      - description: XFI reset
> +      - description: SGMII reset
> +
> +  reset-names:
> +    items:
> +      - const: xfi
> +      - const: sgmii
> +
> +  "#pcs-cells":
> +    const: 0
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - phys
> +  - mediatek,sgmiisys
> +  - resets
> +  - reset-names
> +  - "#pcs-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mediatek,mt7988-clk.h>
> +    #include <dt-bindings/reset/mediatek,mt7988-resets.h>
> +    soc {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +        usxgmiisys0: pcs@...80000 {

Odd/Messed indentation.

Use 4 spaces for example indentation.

Best regards,
Krzysztof