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Date: Tue, 14 Nov 2023 07:56:04 -0600
From: Rob Herring <robh@...nel.org>
To: Daniel Golle <daniel@...rotopia.org>
Cc: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	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 Thu, Nov 09, 2023 at 09:51:47PM +0000, 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.
> 
> Signed-off-by: Daniel Golle <daniel@...rotopia.org>
> ---
>  .../bindings/net/pcs/mediatek,usxgmii.yaml    | 105 ++++++++++++++++++
>  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
> +
> +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:
> +  $nodename:
> +    pattern: "^pcs@[0-9a-f]+$"
> +
> +  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.
> +
> +  resets:
> +    items:
> +      - description: XFI reset
> +      - description: SGMII reset
> +
> +  reset-names:
> +    items:
> +      - const: xfi
> +      - const: sgmii
> +
> +  "#pcs-cells":

There is no such property defined.

Rob

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